diff --git a/packages/types/src/create/registry.ts b/packages/types/src/create/registry.ts
index c5f6b62cd9..215502716b 100644
--- a/packages/types/src/create/registry.ts
+++ b/packages/types/src/create/registry.ts
@@ -93,10 +93,10 @@ export class TypeRegistry implements Registry {
 
   #chainProperties?: ChainProperties;
 
-  #metadataExtensions: string[] = defaultExtensions;
-
   #knownTypes: RegisteredTypes = {};
 
+  #signedExtensions: string[] = defaultExtensions;
+
   constructor () {
     // we only want to import these on creation, i.e. we want to avoid types
     // weird side-effects from circular references. (Since registry is injected
@@ -136,7 +136,7 @@ export class TypeRegistry implements Registry {
   }
 
   public get signedExtensions (): string[] {
-    return this.#metadataExtensions;
+    return this.#signedExtensions;
   }
 
   /**
@@ -240,11 +240,11 @@ export class TypeRegistry implements Registry {
   }
 
   public getSignedExtensionExtra (): Record<string, keyof InterfaceTypes> {
-    return expandExtensionTypes(this.#metadataExtensions, 'extra');
+    return expandExtensionTypes(this.#signedExtensions, 'extra');
   }
 
   public getSignedExtensionTypes (): Record<string, keyof InterfaceTypes> {
-    return expandExtensionTypes(this.#metadataExtensions, 'types');
+    return expandExtensionTypes(this.#signedExtensions, 'types');
   }
 
   public hasClass (name: string): boolean {
@@ -326,10 +326,10 @@ export class TypeRegistry implements Registry {
   }
 
   // sets the available signed extensions
-  setSignedExtensions (signedExtensions: string[]): void {
-    this.#metadataExtensions = signedExtensions;
+  setSignedExtensions (signedExtensions: string[] = defaultExtensions): void {
+    this.#signedExtensions = signedExtensions;
 
-    const unknown = findUnknownExtensions(this.#metadataExtensions);
+    const unknown = findUnknownExtensions(this.#signedExtensions);
 
     if (unknown.length) {
       console.warn(`Unknown signed extensions ${unknown.join(', ')} found, treating them as no-efect`);
diff --git a/packages/types/src/extrinsic/SignerPayload.spec.ts b/packages/types/src/extrinsic/SignerPayload.spec.ts
index 476de5921a..a882d7e961 100644
--- a/packages/types/src/extrinsic/SignerPayload.spec.ts
+++ b/packages/types/src/extrinsic/SignerPayload.spec.ts
@@ -22,6 +22,7 @@ describe('SignerPayload', (): void => {
     genesisHash: '0xdcd1346701ca8396496e52aa2785b1748deb6db09551b72159dcb3e08991025b',
     method: '0x0600ffd7568e5f0a7eda67a82691ff379ac4bba4f9c9b859fe779b5d46363b61ad2db9e56c',
     nonce: '0x00001234',
+    signedExtensions: ['CheckNonce', 'CheckWeight'],
     specVersion: '0x00000006',
     tip: '0x00000000000000000000000000005678',
     transactionVersion: '0x00000007',
@@ -38,6 +39,7 @@ describe('SignerPayload', (): void => {
         genesisHash: '0xdcd1346701ca8396496e52aa2785b1748deb6db09551b72159dcb3e08991025b',
         method: registry.createType('Call', '0x0600ffd7568e5f0a7eda67a82691ff379ac4bba4f9c9b859fe779b5d46363b61ad2db9e56c'),
         nonce: 0x1234,
+        signedExtensions: ['CheckNonce'],
         tip: 0x5678,
         version: 3
       }).toPayload()
@@ -49,6 +51,7 @@ describe('SignerPayload', (): void => {
       genesisHash: '0xdcd1346701ca8396496e52aa2785b1748deb6db09551b72159dcb3e08991025b',
       method: '0x0600ffd7568e5f0a7eda67a82691ff379ac4bba4f9c9b859fe779b5d46363b61ad2db9e56c',
       nonce: '0x00001234',
+      signedExtensions: ['CheckNonce'],
       specVersion: '0x00000000',
       tip: '0x00000000000000000000000000005678',
       transactionVersion: '0x00000000',
@@ -58,7 +61,10 @@ describe('SignerPayload', (): void => {
 
   it('re-constructs from JSON', (): void => {
     expect(
-      new SignerPayload(registry, { ...TEST, runtimeVersion: { specVersion: 0x06, transactionVersion: 0x07 } }).toPayload()
+      new SignerPayload(registry, {
+        ...TEST,
+        runtimeVersion: { specVersion: 0x06, transactionVersion: 0x07 }
+      }).toPayload()
     ).toEqual(TEST);
   });
 
@@ -66,7 +72,10 @@ describe('SignerPayload', (): void => {
     expect(
       new SignerPayload(
         registry,
-        new SignerPayload(registry, { ...TEST, runtimeVersion: { specVersion: 0x06, transactionVersion: 0x07 } })
+        new SignerPayload(registry, {
+          ...TEST,
+          runtimeVersion: { specVersion: 0x06, transactionVersion: 0x07 }
+        })
       ).toPayload()
     ).toEqual(TEST);
   });
diff --git a/packages/types/src/extrinsic/SignerPayload.ts b/packages/types/src/extrinsic/SignerPayload.ts
index 7443e58691..2ed8ef85a9 100644
--- a/packages/types/src/extrinsic/SignerPayload.ts
+++ b/packages/types/src/extrinsic/SignerPayload.ts
@@ -9,6 +9,8 @@ import { u8aToHex } from '@polkadot/util';
 
 import Compact from '../codec/Compact';
 import Struct from '../codec/Struct';
+import Vec from '../codec/Vec';
+import Text from '../primitive/Text';
 import u8 from '../primitive/U8';
 
 export interface SignerPayloadType extends Codec {
@@ -20,6 +22,7 @@ export interface SignerPayloadType extends Codec {
   method: Call;
   nonce: Compact<Index>;
   runtimeVersion: RuntimeVersion;
+  signedExtensions: Vec<Text>;
   tip: Compact<Balance>;
   version: u8;
 }
@@ -35,6 +38,7 @@ const _Payload: Constructor<SignerPayloadType> = Struct.with({
   method: 'Call',
   nonce: 'Compact<Index>',
   runtimeVersion: 'RuntimeVersion',
+  signedExtensions: 'Vec<Text>',
   tip: 'Compact<Balance>',
   version: 'u8'
 }) as any;
@@ -49,7 +53,7 @@ export default class SignerPayload extends _Payload implements ISignerPayload {
    * @description Creates an representation of the structure as an ISignerPayload JSON
    */
   public toPayload (): SignerPayloadJSON {
-    const { address, blockHash, blockNumber, era, genesisHash, method, nonce, runtimeVersion: { specVersion, transactionVersion }, tip, version } = this;
+    const { address, blockHash, blockNumber, era, genesisHash, method, nonce, runtimeVersion: { specVersion, transactionVersion }, signedExtensions, tip, version } = this;
 
     return {
       address: address.toString(),
@@ -59,6 +63,7 @@ export default class SignerPayload extends _Payload implements ISignerPayload {
       genesisHash: genesisHash.toHex(),
       method: method.toHex(),
       nonce: nonce.toHex(),
+      signedExtensions: signedExtensions.map((e) => e.toString()),
       specVersion: specVersion.toHex(),
       tip: tip.toHex(),
       transactionVersion: transactionVersion.toHex(),
diff --git a/packages/types/src/types/extrinsic.ts b/packages/types/src/types/extrinsic.ts
index 72f60b8383..e5c5de02d5 100644
--- a/packages/types/src/types/extrinsic.ts
+++ b/packages/types/src/types/extrinsic.ts
@@ -171,6 +171,11 @@ export interface SignerPayloadJSON {
    */
   transactionVersion: string;
 
+  /**
+   * @description The applicable signed extensions for this runtime
+   */
+  signedExtensions: string[];
+
   /**
    * @description The version of the extrinsic we are dealing with
    */
diff --git a/packages/types/src/types/registry.ts b/packages/types/src/types/registry.ts
index 06e5e7c94e..481ee5b158 100644
--- a/packages/types/src/types/registry.ts
+++ b/packages/types/src/types/registry.ts
@@ -138,5 +138,5 @@ export interface Registry {
   register (arg1: string | Constructor | RegistryTypes, arg2?: Constructor): void;
   setChainProperties (properties?: ChainProperties): void;
   setMetadata (metadata: RegistryMetadata, signedExtensions?: string[]): void;
-  setSignedExtensions (signedExtensions: string[]): void;
+  setSignedExtensions (signedExtensions?: string[]): void;
 }