diff --git a/packages/babel-generator/src/generators/modules.ts b/packages/babel-generator/src/generators/modules.ts
index 8029c04ae9b9..870319ec5477 100644
--- a/packages/babel-generator/src/generators/modules.ts
+++ b/packages/babel-generator/src/generators/modules.ts
@@ -248,6 +248,10 @@ export function ImportDeclaration(this: Printer, node: t.ImportDeclaration) {
     this.noIndentInnerCommentsHere();
     this.word("module");
     this.space();
+  } else if (node.phase) {
+    this.noIndentInnerCommentsHere();
+    this.word(node.phase);
+    this.space();
   }
 
   const specifiers = node.specifiers.slice(0);
@@ -315,6 +319,10 @@ export function ImportNamespaceSpecifier(
 
 export function ImportExpression(this: Printer, node: t.ImportExpression) {
   this.word("import");
+  if (node.phase) {
+    this.token(".");
+    this.word(node.phase);
+  }
   this.token("(");
   this.print(node.source, node);
   if (node.options != null) {
diff --git a/packages/babel-generator/test/fixtures/import-phases/options.json b/packages/babel-generator/test/fixtures/import-phases/options.json
new file mode 100644
index 000000000000..dd7da3eefb1a
--- /dev/null
+++ b/packages/babel-generator/test/fixtures/import-phases/options.json
@@ -0,0 +1,4 @@
+{
+  "plugins": ["sourcePhaseImports"],
+  "parserOpts": { "createImportExpressions": true }
+}
diff --git a/packages/babel-generator/test/fixtures/import-phases/source-declaration/input.js b/packages/babel-generator/test/fixtures/import-phases/source-declaration/input.js
new file mode 100644
index 000000000000..0907982f2885
--- /dev/null
+++ b/packages/babel-generator/test/fixtures/import-phases/source-declaration/input.js
@@ -0,0 +1 @@
+import source x from "y";
diff --git a/packages/babel-generator/test/fixtures/import-phases/source-declaration/output.js b/packages/babel-generator/test/fixtures/import-phases/source-declaration/output.js
new file mode 100644
index 000000000000..b7a8dea61a36
--- /dev/null
+++ b/packages/babel-generator/test/fixtures/import-phases/source-declaration/output.js
@@ -0,0 +1 @@
+import source x from "y";
\ No newline at end of file
diff --git a/packages/babel-generator/test/fixtures/import-phases/source-expression/input.js b/packages/babel-generator/test/fixtures/import-phases/source-expression/input.js
new file mode 100644
index 000000000000..1994954871e6
--- /dev/null
+++ b/packages/babel-generator/test/fixtures/import-phases/source-expression/input.js
@@ -0,0 +1 @@
+import.source("x");
diff --git a/packages/babel-generator/test/fixtures/import-phases/source-expression/output.js b/packages/babel-generator/test/fixtures/import-phases/source-expression/output.js
new file mode 100644
index 000000000000..283642fdf663
--- /dev/null
+++ b/packages/babel-generator/test/fixtures/import-phases/source-expression/output.js
@@ -0,0 +1 @@
+import.source("x");
\ No newline at end of file
diff --git a/packages/babel-parser/data/schema.json b/packages/babel-parser/data/schema.json
index 25732221a273..ad149875ab72 100644
--- a/packages/babel-parser/data/schema.json
+++ b/packages/babel-parser/data/schema.json
@@ -192,6 +192,7 @@
               "placeholders",
               "privateIn",
               "regexpUnicodeSets",
+              "sourcePhaseImports",
               "throwExpressions",
               "topLevelAwait",
               "typescript",
diff --git a/packages/babel-parser/src/parse-error/standard-errors.ts b/packages/babel-parser/src/parse-error/standard-errors.ts
index 0d43a53046af..92fe0348a874 100644
--- a/packages/babel-parser/src/parse-error/standard-errors.ts
+++ b/packages/babel-parser/src/parse-error/standard-errors.ts
@@ -233,6 +233,10 @@ export default {
     "In non-strict mode code, functions can only be declared at top level or inside a block.",
   SloppyFunctionAnnexB:
     "In non-strict mode code, functions can only be declared at top level, inside a block, or as the body of an if statement.",
+  SourcePhaseImportRequiresDefault:
+    'Only `import source x from "./module"` is valid.',
+  SourcePhaseDynamicImportRequiresImportExpressions:
+    "'import.source(...)' can only be parsed when using the 'createImportExpressions' option.",
   StaticPrototype: "Classes may not have static property named prototype.",
   SuperNotAllowed:
     "`super()` is only valid inside a class constructor of a subclass. Maybe a typo in the method name ('constructor') or not extending another class?",
diff --git a/packages/babel-parser/src/parser/expression.ts b/packages/babel-parser/src/parser/expression.ts
index 0d073646b729..d672fde59b32 100644
--- a/packages/babel-parser/src/parser/expression.ts
+++ b/packages/babel-parser/src/parser/expression.ts
@@ -1652,7 +1652,10 @@ export default abstract class ExpressionParser extends LValParser {
   }
 
   // https://tc39.es/ecma262/#prod-ImportMeta
-  parseImportMetaProperty(node: Undone<N.MetaProperty>): N.MetaProperty {
+  parseImportMetaProperty(
+    this: Parser,
+    node: Undone<N.MetaProperty | N.ImportExpression>,
+  ): N.MetaProperty | N.ImportExpression {
     const id = this.createIdentifier(
       this.startNodeAtNode<N.Identifier>(node),
       "import",
@@ -1664,9 +1667,20 @@ export default abstract class ExpressionParser extends LValParser {
         this.raise(Errors.ImportMetaOutsideModule, { at: id });
       }
       this.sawUnambiguousESM = true;
+    } else if (this.isContextual(tt._source)) {
+      this.expectPlugin("sourcePhaseImports");
+      if (!this.options.createImportExpressions) {
+        throw this.raise(
+          Errors.SourcePhaseDynamicImportRequiresImportExpressions,
+          { at: this.state.startLoc },
+        );
+      }
+      this.next();
+      (node as Undone<N.ImportExpression>).phase = "source";
+      return this.parseImportCall(node as Undone<N.ImportExpression>);
     }
 
-    return this.parseMetaProperty(node, id, "meta");
+    return this.parseMetaProperty(node as Undone<N.MetaProperty>, id, "meta");
   }
 
   parseLiteralAtNode<T extends N.Node>(
diff --git a/packages/babel-parser/src/parser/statement.ts b/packages/babel-parser/src/parser/statement.ts
index a84981fe5bec..29fd8c2afa47 100644
--- a/packages/babel-parser/src/parser/statement.ts
+++ b/packages/babel-parser/src/parser/statement.ts
@@ -2870,13 +2870,21 @@ export default abstract class StatementParser extends ExpressionParser {
   }
 
   checkImportReflection(node: Undone<N.ImportDeclaration>) {
-    if (node.module) {
-      if (
-        node.specifiers.length !== 1 ||
-        node.specifiers[0].type !== "ImportDefaultSpecifier"
-      ) {
+    const { specifiers } = node;
+    const isSingleDefaultBinding =
+      specifiers.length === 1 &&
+      specifiers[0].type === "ImportDefaultSpecifier";
+
+    if (node.phase === "source") {
+      if (!isSingleDefaultBinding) {
+        this.raise(Errors.SourcePhaseImportRequiresDefault, {
+          at: specifiers[0].loc.start,
+        });
+      }
+    } else if (node.module) {
+      if (!isSingleDefaultBinding) {
         this.raise(Errors.ImportReflectionNotBinding, {
-          at: node.specifiers[0].loc.start,
+          at: specifiers[0].loc.start,
         });
       }
       if (node.assertions?.length > 0) {
@@ -2921,7 +2929,8 @@ export default abstract class StatementParser extends ExpressionParser {
   }
 
   isPotentialImportPhase(isExport: boolean): boolean {
-    return !isExport && this.isContextual(tt._module);
+    if (isExport) return false;
+    return this.isContextual(tt._source) || this.isContextual(tt._module);
   }
 
   applyImportPhase(
@@ -2932,20 +2941,28 @@ export default abstract class StatementParser extends ExpressionParser {
   ): void {
     if (isExport) {
       if (!process.env.IS_PUBLISH) {
-        if (phase === "module") {
+        if (phase === "module" || phase === "source") {
           throw new Error(
-            "Assertion failure: export declarations do not support the 'module' phase.",
+            `Assertion failure: export declarations do not support the '${phase}' phase.`,
           );
         }
       }
       return;
     }
+
     if (phase === "module") {
       this.expectPlugin("importReflection", loc);
       (node as N.ImportDeclaration).module = true;
     } else if (this.hasPlugin("importReflection")) {
       (node as N.ImportDeclaration).module = false;
     }
+
+    if (phase === "source") {
+      this.expectPlugin("sourcePhaseImports", loc);
+      (node as N.ImportDeclaration).phase = "source";
+    } else if (this.hasPlugin("sourcePhaseImports")) {
+      (node as N.ImportDeclaration).phase = null;
+    }
   }
 
   /*
diff --git a/packages/babel-parser/src/tokenizer/types.ts b/packages/babel-parser/src/tokenizer/types.ts
index 385bab7e71fb..daa10d39e511 100644
--- a/packages/babel-parser/src/tokenizer/types.ts
+++ b/packages/babel-parser/src/tokenizer/types.ts
@@ -291,6 +291,7 @@ export const tt = {
   _of: createKeywordLike("of", { startsExpr }),
   _sent: createKeywordLike("sent", { startsExpr }),
   _set: createKeywordLike("set", { startsExpr }),
+  _source: createKeywordLike("source", { startsExpr }),
   _static: createKeywordLike("static", { startsExpr }),
   _using: createKeywordLike("using", { startsExpr }),
   _yield: createKeywordLike("yield", { startsExpr }),
diff --git a/packages/babel-parser/src/types.d.ts b/packages/babel-parser/src/types.d.ts
index 1c21761bafff..5799756091a1 100644
--- a/packages/babel-parser/src/types.d.ts
+++ b/packages/babel-parser/src/types.d.ts
@@ -627,6 +627,7 @@ export interface NewExpression extends CallOrNewBase {
 export interface ImportExpression extends NodeBase {
   type: "ImportExpression";
   source: Expression;
+  phase?: null | "source";
   options: Expression | null;
 }
 
@@ -927,6 +928,7 @@ export interface ImportDeclaration extends NodeBase {
   >;
   source: Literal;
   importKind?: "type" | "typeof" | "value"; // TODO: Not in spec,
+  phase?: null | "source";
   attributes?: ImportAttribute[];
   // @deprecated
   assertions?: ImportAttribute[];
diff --git a/packages/babel-parser/src/typings.d.ts b/packages/babel-parser/src/typings.d.ts
index dbbaf4f76163..126a6c1286d7 100644
--- a/packages/babel-parser/src/typings.d.ts
+++ b/packages/babel-parser/src/typings.d.ts
@@ -36,6 +36,7 @@ export type Plugin =
   | "placeholders"
   | "privateIn" // Enabled by default
   | "regexpUnicodeSets" // Enabled by default
+  | "sourcePhaseImports"
   | "throwExpressions"
   | "topLevelAwait"
   | "v8intrinsic"
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/attributes-declaration/input.js b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/attributes-declaration/input.js
new file mode 100644
index 000000000000..b3ab4945e1d3
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/attributes-declaration/input.js
@@ -0,0 +1 @@
+import source s from "x" with { attr: "val" };
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/attributes-declaration/options.json b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/attributes-declaration/options.json
new file mode 100644
index 000000000000..c4a65d77444d
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/attributes-declaration/options.json
@@ -0,0 +1,4 @@
+{
+  "sourceType": "module",
+  "plugins": ["sourcePhaseImports", "importAttributes"]
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/attributes-declaration/output.json b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/attributes-declaration/output.json
new file mode 100644
index 000000000000..93232efb0709
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/attributes-declaration/output.json
@@ -0,0 +1,58 @@
+{
+  "type": "File",
+  "start":0,"end":46,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":46,"index":46}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":46,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":46,"index":46}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ImportDeclaration",
+        "start":0,"end":46,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":46,"index":46}},
+        "phase": "source",
+        "specifiers": [
+          {
+            "type": "ImportDefaultSpecifier",
+            "start":14,"end":15,"loc":{"start":{"line":1,"column":14,"index":14},"end":{"line":1,"column":15,"index":15}},
+            "local": {
+              "type": "Identifier",
+              "start":14,"end":15,"loc":{"start":{"line":1,"column":14,"index":14},"end":{"line":1,"column":15,"index":15},"identifierName":"s"},
+              "name": "s"
+            }
+          }
+        ],
+        "source": {
+          "type": "StringLiteral",
+          "start":21,"end":24,"loc":{"start":{"line":1,"column":21,"index":21},"end":{"line":1,"column":24,"index":24}},
+          "extra": {
+            "rawValue": "x",
+            "raw": "\"x\""
+          },
+          "value": "x"
+        },
+        "attributes": [
+          {
+            "type": "ImportAttribute",
+            "start":32,"end":43,"loc":{"start":{"line":1,"column":32,"index":32},"end":{"line":1,"column":43,"index":43}},
+            "key": {
+              "type": "Identifier",
+              "start":32,"end":36,"loc":{"start":{"line":1,"column":32,"index":32},"end":{"line":1,"column":36,"index":36},"identifierName":"attr"},
+              "name": "attr"
+            },
+            "value": {
+              "type": "StringLiteral",
+              "start":38,"end":43,"loc":{"start":{"line":1,"column":38,"index":38},"end":{"line":1,"column":43,"index":43}},
+              "extra": {
+                "rawValue": "val",
+                "raw": "\"val\""
+              },
+              "value": "val"
+            }
+          }
+        ]
+      }
+    ],
+    "directives": []
+  }
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/attributes-expression/input.js b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/attributes-expression/input.js
new file mode 100644
index 000000000000..329aa1d6c1d9
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/attributes-expression/input.js
@@ -0,0 +1 @@
+import.source("x", { with: { attr: "val" } });
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/attributes-expression/options.json b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/attributes-expression/options.json
new file mode 100644
index 000000000000..01b7ae8a55b8
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/attributes-expression/options.json
@@ -0,0 +1,4 @@
+{
+  "plugins": ["sourcePhaseImports", "importAttributes"],
+  "createImportExpressions": true
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/attributes-expression/output.json b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/attributes-expression/output.json
new file mode 100644
index 000000000000..35f3fbdc146e
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/attributes-expression/output.json
@@ -0,0 +1,76 @@
+{
+  "type": "File",
+  "start":0,"end":46,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":46,"index":46}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":46,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":46,"index":46}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start":0,"end":46,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":46,"index":46}},
+        "expression": {
+          "type": "ImportExpression",
+          "start":0,"end":45,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":45,"index":45}},
+          "phase": "source",
+          "source": {
+            "type": "StringLiteral",
+            "start":14,"end":17,"loc":{"start":{"line":1,"column":14,"index":14},"end":{"line":1,"column":17,"index":17}},
+            "extra": {
+              "rawValue": "x",
+              "raw": "\"x\""
+            },
+            "value": "x"
+          },
+          "options": {
+            "type": "ObjectExpression",
+            "start":19,"end":44,"loc":{"start":{"line":1,"column":19,"index":19},"end":{"line":1,"column":44,"index":44}},
+            "properties": [
+              {
+                "type": "ObjectProperty",
+                "start":21,"end":42,"loc":{"start":{"line":1,"column":21,"index":21},"end":{"line":1,"column":42,"index":42}},
+                "method": false,
+                "key": {
+                  "type": "Identifier",
+                  "start":21,"end":25,"loc":{"start":{"line":1,"column":21,"index":21},"end":{"line":1,"column":25,"index":25},"identifierName":"with"},
+                  "name": "with"
+                },
+                "computed": false,
+                "shorthand": false,
+                "value": {
+                  "type": "ObjectExpression",
+                  "start":27,"end":42,"loc":{"start":{"line":1,"column":27,"index":27},"end":{"line":1,"column":42,"index":42}},
+                  "properties": [
+                    {
+                      "type": "ObjectProperty",
+                      "start":29,"end":40,"loc":{"start":{"line":1,"column":29,"index":29},"end":{"line":1,"column":40,"index":40}},
+                      "method": false,
+                      "key": {
+                        "type": "Identifier",
+                        "start":29,"end":33,"loc":{"start":{"line":1,"column":29,"index":29},"end":{"line":1,"column":33,"index":33},"identifierName":"attr"},
+                        "name": "attr"
+                      },
+                      "computed": false,
+                      "shorthand": false,
+                      "value": {
+                        "type": "StringLiteral",
+                        "start":35,"end":40,"loc":{"start":{"line":1,"column":35,"index":35},"end":{"line":1,"column":40,"index":40}},
+                        "extra": {
+                          "rawValue": "val",
+                          "raw": "\"val\""
+                        },
+                        "value": "val"
+                      }
+                    }
+                  ]
+                }
+              }
+            ]
+          }
+        }
+      }
+    ],
+    "directives": []
+  }
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/dynamic-import-no-createImportExpressions/input.js b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/dynamic-import-no-createImportExpressions/input.js
new file mode 100644
index 000000000000..80f2a209f3bb
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/dynamic-import-no-createImportExpressions/input.js
@@ -0,0 +1 @@
+import.source("foo");
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/dynamic-import-no-createImportExpressions/options.json b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/dynamic-import-no-createImportExpressions/options.json
new file mode 100644
index 000000000000..82867fc88bbb
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/dynamic-import-no-createImportExpressions/options.json
@@ -0,0 +1,4 @@
+{
+  "plugins": ["sourcePhaseImports"],
+  "throws": "'import.source(...)' can only be parsed when using the 'createImportExpressions' option. (1:7)"
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/dynamic-import/input.js b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/dynamic-import/input.js
new file mode 100644
index 000000000000..80f2a209f3bb
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/dynamic-import/input.js
@@ -0,0 +1 @@
+import.source("foo");
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/dynamic-import/options.json b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/dynamic-import/options.json
new file mode 100644
index 000000000000..10b0764f64b7
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/dynamic-import/options.json
@@ -0,0 +1,4 @@
+{
+  "plugins": ["sourcePhaseImports"],
+  "createImportExpressions": true
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/dynamic-import/output.json b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/dynamic-import/output.json
new file mode 100644
index 000000000000..d77b2e5a5e71
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/dynamic-import/output.json
@@ -0,0 +1,31 @@
+{
+  "type": "File",
+  "start":0,"end":21,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":21,"index":21}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":21,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":21,"index":21}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start":0,"end":21,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":21,"index":21}},
+        "expression": {
+          "type": "ImportExpression",
+          "start":0,"end":20,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":20,"index":20}},
+          "phase": "source",
+          "source": {
+            "type": "StringLiteral",
+            "start":14,"end":19,"loc":{"start":{"line":1,"column":14,"index":14},"end":{"line":1,"column":19,"index":19}},
+            "extra": {
+              "rawValue": "foo",
+              "raw": "\"foo\""
+            },
+            "value": "foo"
+          }
+        }
+      }
+    ],
+    "directives": []
+  }
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-default-binding-source/input.js b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-default-binding-source/input.js
new file mode 100644
index 000000000000..82164c0f91b2
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-default-binding-source/input.js
@@ -0,0 +1 @@
+import source from "x";
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-default-binding-source/output.json b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-default-binding-source/output.json
new file mode 100644
index 000000000000..64a65c083939
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-default-binding-source/output.json
@@ -0,0 +1,38 @@
+{
+  "type": "File",
+  "start":0,"end":23,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":23,"index":23}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":23,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":23,"index":23}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ImportDeclaration",
+        "start":0,"end":23,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":23,"index":23}},
+        "phase": null,
+        "specifiers": [
+          {
+            "type": "ImportDefaultSpecifier",
+            "start":7,"end":13,"loc":{"start":{"line":1,"column":7,"index":7},"end":{"line":1,"column":13,"index":13}},
+            "local": {
+              "type": "Identifier",
+              "start":7,"end":13,"loc":{"start":{"line":1,"column":7,"index":7},"end":{"line":1,"column":13,"index":13},"identifierName":"source"},
+              "name": "source"
+            }
+          }
+        ],
+        "source": {
+          "type": "StringLiteral",
+          "start":19,"end":22,"loc":{"start":{"line":1,"column":19,"index":19},"end":{"line":1,"column":22,"index":22}},
+          "extra": {
+            "rawValue": "x",
+            "raw": "\"x\""
+          },
+          "value": "x"
+        }
+      }
+    ],
+    "directives": []
+  }
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-source-binding-from/input.js b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-source-binding-from/input.js
new file mode 100644
index 000000000000..a5c6af299fd3
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-source-binding-from/input.js
@@ -0,0 +1 @@
+import source from from "x";
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-source-binding-from/output.json b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-source-binding-from/output.json
new file mode 100644
index 000000000000..9280e87e471d
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-source-binding-from/output.json
@@ -0,0 +1,38 @@
+{
+  "type": "File",
+  "start":0,"end":28,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":28,"index":28}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":28,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":28,"index":28}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ImportDeclaration",
+        "start":0,"end":28,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":28,"index":28}},
+        "phase": "source",
+        "specifiers": [
+          {
+            "type": "ImportDefaultSpecifier",
+            "start":14,"end":18,"loc":{"start":{"line":1,"column":14,"index":14},"end":{"line":1,"column":18,"index":18}},
+            "local": {
+              "type": "Identifier",
+              "start":14,"end":18,"loc":{"start":{"line":1,"column":14,"index":14},"end":{"line":1,"column":18,"index":18},"identifierName":"from"},
+              "name": "from"
+            }
+          }
+        ],
+        "source": {
+          "type": "StringLiteral",
+          "start":24,"end":27,"loc":{"start":{"line":1,"column":24,"index":24},"end":{"line":1,"column":27,"index":27}},
+          "extra": {
+            "rawValue": "x",
+            "raw": "\"x\""
+          },
+          "value": "x"
+        }
+      }
+    ],
+    "directives": []
+  }
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-source-binding-source/input.js b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-source-binding-source/input.js
new file mode 100644
index 000000000000..a21321d210f8
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-source-binding-source/input.js
@@ -0,0 +1 @@
+import source source from "x";
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-source-binding-source/output.json b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-source-binding-source/output.json
new file mode 100644
index 000000000000..ca1a5118448f
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-source-binding-source/output.json
@@ -0,0 +1,38 @@
+{
+  "type": "File",
+  "start":0,"end":30,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":30,"index":30}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":30,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":30,"index":30}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ImportDeclaration",
+        "start":0,"end":30,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":30,"index":30}},
+        "phase": "source",
+        "specifiers": [
+          {
+            "type": "ImportDefaultSpecifier",
+            "start":14,"end":20,"loc":{"start":{"line":1,"column":14,"index":14},"end":{"line":1,"column":20,"index":20}},
+            "local": {
+              "type": "Identifier",
+              "start":14,"end":20,"loc":{"start":{"line":1,"column":14,"index":14},"end":{"line":1,"column":20,"index":20},"identifierName":"source"},
+              "name": "source"
+            }
+          }
+        ],
+        "source": {
+          "type": "StringLiteral",
+          "start":26,"end":29,"loc":{"start":{"line":1,"column":26,"index":26},"end":{"line":1,"column":29,"index":29}},
+          "extra": {
+            "rawValue": "x",
+            "raw": "\"x\""
+          },
+          "value": "x"
+        }
+      }
+    ],
+    "directives": []
+  }
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-source/input.js b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-source/input.js
new file mode 100644
index 000000000000..6cfa837a5768
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-source/input.js
@@ -0,0 +1 @@
+import source x from "x";
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-source/output.json b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-source/output.json
new file mode 100644
index 000000000000..84970bf7a9ad
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/import-source/output.json
@@ -0,0 +1,38 @@
+{
+  "type": "File",
+  "start":0,"end":25,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":25,"index":25}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":25,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":25,"index":25}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ImportDeclaration",
+        "start":0,"end":25,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":25,"index":25}},
+        "phase": "source",
+        "specifiers": [
+          {
+            "type": "ImportDefaultSpecifier",
+            "start":14,"end":15,"loc":{"start":{"line":1,"column":14,"index":14},"end":{"line":1,"column":15,"index":15}},
+            "local": {
+              "type": "Identifier",
+              "start":14,"end":15,"loc":{"start":{"line":1,"column":14,"index":14},"end":{"line":1,"column":15,"index":15},"identifierName":"x"},
+              "name": "x"
+            }
+          }
+        ],
+        "source": {
+          "type": "StringLiteral",
+          "start":21,"end":24,"loc":{"start":{"line":1,"column":21,"index":21},"end":{"line":1,"column":24,"index":24}},
+          "extra": {
+            "rawValue": "x",
+            "raw": "\"x\""
+          },
+          "value": "x"
+        }
+      }
+    ],
+    "directives": []
+  }
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/no-named/input.js b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/no-named/input.js
new file mode 100644
index 000000000000..3a5f9a7c45d8
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/no-named/input.js
@@ -0,0 +1 @@
+import source { x } from "x";
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/no-named/output.json b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/no-named/output.json
new file mode 100644
index 000000000000..082eaec22323
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/no-named/output.json
@@ -0,0 +1,46 @@
+{
+  "type": "File",
+  "start":0,"end":29,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":29,"index":29}},
+  "errors": [
+    "SyntaxError: Only `import source x from \"./module\"` is valid. (1:16)"
+  ],
+  "program": {
+    "type": "Program",
+    "start":0,"end":29,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":29,"index":29}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ImportDeclaration",
+        "start":0,"end":29,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":29,"index":29}},
+        "phase": "source",
+        "specifiers": [
+          {
+            "type": "ImportSpecifier",
+            "start":16,"end":17,"loc":{"start":{"line":1,"column":16,"index":16},"end":{"line":1,"column":17,"index":17}},
+            "imported": {
+              "type": "Identifier",
+              "start":16,"end":17,"loc":{"start":{"line":1,"column":16,"index":16},"end":{"line":1,"column":17,"index":17},"identifierName":"x"},
+              "name": "x"
+            },
+            "local": {
+              "type": "Identifier",
+              "start":16,"end":17,"loc":{"start":{"line":1,"column":16,"index":16},"end":{"line":1,"column":17,"index":17},"identifierName":"x"},
+              "name": "x"
+            }
+          }
+        ],
+        "source": {
+          "type": "StringLiteral",
+          "start":25,"end":28,"loc":{"start":{"line":1,"column":25,"index":25},"end":{"line":1,"column":28,"index":28}},
+          "extra": {
+            "rawValue": "x",
+            "raw": "\"x\""
+          },
+          "value": "x"
+        }
+      }
+    ],
+    "directives": []
+  }
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/no-namespace/input.js b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/no-namespace/input.js
new file mode 100644
index 000000000000..b991e826da8d
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/no-namespace/input.js
@@ -0,0 +1 @@
+import source * as x from "x";
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/no-namespace/output.json b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/no-namespace/output.json
new file mode 100644
index 000000000000..296ee9fea1f1
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/no-namespace/output.json
@@ -0,0 +1,41 @@
+{
+  "type": "File",
+  "start":0,"end":30,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":30,"index":30}},
+  "errors": [
+    "SyntaxError: Only `import source x from \"./module\"` is valid. (1:14)"
+  ],
+  "program": {
+    "type": "Program",
+    "start":0,"end":30,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":30,"index":30}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ImportDeclaration",
+        "start":0,"end":30,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":30,"index":30}},
+        "phase": "source",
+        "specifiers": [
+          {
+            "type": "ImportNamespaceSpecifier",
+            "start":14,"end":20,"loc":{"start":{"line":1,"column":14,"index":14},"end":{"line":1,"column":20,"index":20}},
+            "local": {
+              "type": "Identifier",
+              "start":19,"end":20,"loc":{"start":{"line":1,"column":19,"index":19},"end":{"line":1,"column":20,"index":20},"identifierName":"x"},
+              "name": "x"
+            }
+          }
+        ],
+        "source": {
+          "type": "StringLiteral",
+          "start":26,"end":29,"loc":{"start":{"line":1,"column":26,"index":26},"end":{"line":1,"column":29,"index":29}},
+          "extra": {
+            "rawValue": "x",
+            "raw": "\"x\""
+          },
+          "value": "x"
+        }
+      }
+    ],
+    "directives": []
+  }
+}
diff --git a/packages/babel-parser/test/fixtures/experimental/source-phase-imports/options.json b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/options.json
new file mode 100644
index 000000000000..2d987408711b
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/experimental/source-phase-imports/options.json
@@ -0,0 +1,4 @@
+{
+  "sourceType": "module",
+  "plugins": ["sourcePhaseImports"]
+}
diff --git a/packages/babel-parser/typings/babel-parser.d.ts b/packages/babel-parser/typings/babel-parser.d.ts
index aa021814ce76..54743d7aa382 100644
--- a/packages/babel-parser/typings/babel-parser.d.ts
+++ b/packages/babel-parser/typings/babel-parser.d.ts
@@ -40,6 +40,7 @@ type Plugin =
   | "placeholders"
   | "privateIn" // Enabled by default
   | "regexpUnicodeSets" // Enabled by default
+  | "sourcePhaseImports"
   | "throwExpressions"
   | "topLevelAwait"
   | "v8intrinsic"
diff --git a/packages/babel-types/src/ast-types/generated/index.ts b/packages/babel-types/src/ast-types/generated/index.ts
index 2281fb58abed..e2007191e38c 100644
--- a/packages/babel-types/src/ast-types/generated/index.ts
+++ b/packages/babel-types/src/ast-types/generated/index.ts
@@ -864,6 +864,7 @@ export interface ImportDeclaration extends BaseNode {
   attributes?: Array<ImportAttribute> | null;
   importKind?: "type" | "typeof" | "value" | null;
   module?: boolean | null;
+  phase?: "source" | null;
 }
 
 export interface ImportDefaultSpecifier extends BaseNode {
@@ -887,6 +888,7 @@ export interface ImportExpression extends BaseNode {
   type: "ImportExpression";
   source: Expression;
   options?: Expression | null;
+  phase?: "source" | null;
 }
 
 export interface MetaProperty extends BaseNode {
diff --git a/packages/babel-types/src/definitions/core.ts b/packages/babel-types/src/definitions/core.ts
index c6a656c40212..5c249569d3f8 100644
--- a/packages/babel-types/src/definitions/core.ts
+++ b/packages/babel-types/src/definitions/core.ts
@@ -1743,6 +1743,10 @@ defineType("ImportDeclaration", {
       optional: true,
       validate: assertValueType("boolean"),
     },
+    phase: {
+      default: null,
+      validate: assertOneOf("source"),
+    },
     specifiers: {
       validate: chain(
         assertValueType("array"),
@@ -1810,6 +1814,10 @@ defineType("ImportExpression", {
   visitor: ["source", "options"],
   aliases: ["Expression"],
   fields: {
+    phase: {
+      default: null,
+      validate: assertOneOf("source"),
+    },
     source: {
       validate: assertNodeType("Expression"),
     },