diff --git a/packages/types/src/extrinsic/v5/Extrinsic.ts b/packages/types/src/extrinsic/v5/Extrinsic.ts
index 70f61565f23..955403604a2 100644
--- a/packages/types/src/extrinsic/v5/Extrinsic.ts
+++ b/packages/types/src/extrinsic/v5/Extrinsic.ts
@@ -10,6 +10,8 @@ import type { ExtrinsicOptions } from '../types.js';
 import { Struct } from '@polkadot/types-codec';
 import { isU8a } from '@polkadot/util';
 
+export const EXTRINSIC_VERSION = 5;
+
 export interface ExtrinsicValueV5 {
   method?: Call;
   signature?: ExtrinsicSignatureV5;
@@ -74,7 +76,7 @@ export class GenericExtrinsicV5 extends Struct implements IExtrinsicV5Impl {
    * @description The version for the signature
    */
   public get version (): number {
-    return this.getT('version');
+    return EXTRINSIC_VERSION;
   }
 
   /**
diff --git a/packages/types/src/extrinsic/v5/ExtrinsicPayload.ts b/packages/types/src/extrinsic/v5/ExtrinsicPayload.ts
index 9cd66e72461..e01c13d94a0 100644
--- a/packages/types/src/extrinsic/v5/ExtrinsicPayload.ts
+++ b/packages/types/src/extrinsic/v5/ExtrinsicPayload.ts
@@ -2,16 +2,13 @@
 // SPDX-License-Identifier: Apache-2.0
 
 import type { SignOptions } from '@polkadot/keyring/types';
-import type { Hash, MultiLocation } from '@polkadot/types/interfaces';
-import type { Bytes } from '@polkadot/types-codec';
-import type { Inspect, Registry } from '@polkadot/types-codec/types';
+import type { Registry } from '@polkadot/types-codec/types';
 import type { HexString } from '@polkadot/util/types';
-import type { BlockHash } from '../../interfaces/chain/index.js';
-import type { ExtrinsicEra } from '../../interfaces/extrinsics/index.js';
-import type { ExtrinsicPayloadValue, ICompact, IKeyringPair, INumber, IOption } from '../../types/index.js';
+import type { ExtrinsicPayloadValue, IKeyringPair } from '../../types/index.js';
 
-import { Enum, Struct } from '@polkadot/types-codec';
-import { objectSpread } from '@polkadot/util';
+import { Enum } from '@polkadot/types-codec';
+
+import { GenericExtrinsicPayloadV4 } from '../v4/ExtrinsicPayload.js';
 
 /**
  * @name GenericExtrinsicPayloadV5
@@ -19,15 +16,11 @@ import { objectSpread } from '@polkadot/util';
  * A signing payload for an [[Extrinsic]]. For the final encoding, it is
  * variable length based on the contents included
  */
-export class GenericExtrinsicPayloadV5 extends Struct {
+export class GenericExtrinsicPayloadV5 extends GenericExtrinsicPayloadV4 {
   #signOptions: SignOptions;
 
   constructor (registry: Registry, value?: ExtrinsicPayloadValue | Uint8Array | HexString) {
-    super(registry, objectSpread(
-      { method: 'Bytes' },
-      registry.getSignedExtensionTypes(),
-      registry.getSignedExtensionExtra()
-    ), value);
+    super(registry, value);
 
     // Do detection for the type of extrinsic, in the case of MultiSignature
     // this is an enum, in the case of AnySignature, this is a Hash only
@@ -37,87 +30,10 @@ export class GenericExtrinsicPayloadV5 extends Struct {
     };
   }
 
-  /**
-   * @description Returns a breakdown of the hex encoding for this Codec
-   */
-  public override inspect (): Inspect {
-    return super.inspect({ method: true });
-  }
-
-  /**
-   * @description The block [[BlockHash]] the signature applies to (mortal/immortal)
-   */
-  public get blockHash (): BlockHash {
-    return this.getT('blockHash');
-  }
-
-  /**
-   * @description The [[ExtrinsicEra]]
-   */
-  public get era (): ExtrinsicEra {
-    return this.getT('era');
-  }
-
-  /**
-   * @description The genesis [[BlockHash]] the signature applies to (mortal/immortal)
-   */
-  public get genesisHash (): BlockHash {
-    return this.getT('genesisHash');
-  }
-
-  /**
-   * @description The [[Bytes]] contained in the payload
-   */
-  public get method (): Bytes {
-    return this.getT('method');
-  }
-
-  /**
-   * @description The [[Index]]
-   */
-  public get nonce (): ICompact<INumber> {
-    return this.getT('nonce');
-  }
-
-  /**
-   * @description The specVersion for this signature
-   */
-  public get specVersion (): INumber {
-    return this.getT('specVersion');
-  }
-
-  /**
-   * @description The tip [[Balance]]
-   */
-  public get tip (): ICompact<INumber> {
-    return this.getT('tip');
-  }
-
-  /**
-   * @description The transactionVersion for this signature
-   */
-  public get transactionVersion (): INumber {
-    return this.getT('transactionVersion');
-  }
-
-  /**
-   * @description The (optional) asset id for this signature for chains that support transaction fees in assets
-   */
-  public get assetId (): IOption<INumber | MultiLocation> {
-    return this.getT('assetId');
-  }
-
-  /**
-   * @description The (optional) asset id for this signature for chains that support transaction fees in assets
-   */
-  public get metadataHash (): IOption<Hash> {
-    return this.getT('metadataHash');
-  }
-
   /**
    * @description Sign the payload with the keypair
    */
-  public sign (signerPair: IKeyringPair): Uint8Array {
+  public override sign (signerPair: IKeyringPair): Uint8Array {
     // NOTE The `toU8a({ method: true })` argument is absolutely critical, we
     // don't want the method (Bytes) to have the length prefix included. This
     // means that the data-as-signed is un-decodable, but is also doesn't need