diff --git a/packages/web3-core/src/web3_config.ts b/packages/web3-core/src/web3_config.ts
index bf944dc9ba5..cfb1939cc09 100644
--- a/packages/web3-core/src/web3_config.ts
+++ b/packages/web3-core/src/web3_config.ts
@@ -25,7 +25,7 @@ import {
 } from 'web3-types';
 import { ConfigHardforkMismatchError, ConfigChainMismatchError } from 'web3-errors';
 import { isNullish, toHex } from 'web3-utils';
-import { ValidationSchemaInput } from 'web3-validator';
+import { ValidationSchemaInput, Schema } from 'web3-validator';
 import { TransactionTypeParser } from './types.js';
 // eslint-disable-next-line import/no-cycle
 import { TransactionBuilder } from './web3_context.js';
@@ -523,6 +523,15 @@ export abstract class Web3Config
 		this.config.transactionTypeParser = val;
 	}
 
+	public get customTransactionSchema() {
+		return this.config.customTransactionSchema;
+	}
+
+	public set customTransactionSchema(schema: ValidationSchemaInput) {
+		this._triggerConfigChange('customTransactionSchema', schema);
+		this.config.customTransactionSchema = schema;
+	}
+
 	private _triggerConfigChange<K extends keyof Web3ConfigOptions>(
 		config: K,
 		newValue: Web3ConfigOptions[K],
diff --git a/packages/web3-core/src/web3_context.ts b/packages/web3-core/src/web3_context.ts
index d030b375b9a..f181a28bba2 100644
--- a/packages/web3-core/src/web3_context.ts
+++ b/packages/web3-core/src/web3_context.ts
@@ -119,7 +119,6 @@ export class Web3Context<
 			isSupportedProvider(providerOrContext as SupportedProviders<API>)
 		) {
 			this._requestManager = new Web3RequestManager<API>(
-				{},
 				providerOrContext as undefined | string | SupportedProviders<API>,
 			);
 			this._subscriptionManager = new Web3SubscriptionManager(
@@ -146,7 +145,7 @@ export class Web3Context<
 		this._requestManager =
 			requestManager ??
 			new Web3RequestManager<API>(
-				this.config,
+				config,
 				provider,
 				config?.enableExperimentalFeatures?.useSubscriptionWhenCheckingBlockTimeout,
 				requestManagerMiddleware,
diff --git a/packages/web3-core/src/web3_request_manager.ts b/packages/web3-core/src/web3_request_manager.ts
index 087d8b3cbd8..70ce2425912 100644
--- a/packages/web3-core/src/web3_request_manager.ts
+++ b/packages/web3-core/src/web3_request_manager.ts
@@ -75,18 +75,18 @@ export class Web3RequestManager<
 }> {
 	private _provider?: SupportedProviders<API>;
 	private readonly useRpcCallSpecification?: boolean;
-	public config: Web3ConfigOptions;
+	public config: Partial<Web3ConfigOptions>;
 	public middleware?: RequestManagerMiddleware<API>;
 
 	public constructor(
-		config: Web3ConfigOptions,
 		provider?: SupportedProviders<API> | string,
 		useRpcCallSpecification?: boolean,
 		requestManagerMiddleware?: RequestManagerMiddleware<API>,
+		config?: Partial<Web3ConfigOptions>,
 	) {
 		super();
 
-		this.config = config;
+		this.config = config ?? {};
 
 		if (!isNullish(provider)) {
 			this.setProvider(provider);
diff --git a/packages/web3-core/test/unit/web3_config.test.ts b/packages/web3-core/test/unit/web3_config.test.ts
index bd250d6386a..7238c1fcb33 100644
--- a/packages/web3-core/test/unit/web3_config.test.ts
+++ b/packages/web3-core/test/unit/web3_config.test.ts
@@ -49,6 +49,7 @@ const defaultConfig = {
 	defaultReturnFormat: DEFAULT_RETURN_FORMAT,
 	transactionBuilder: undefined,
 	transactionTypeParser: undefined,
+	customTransactionSchema: undefined,
 };
 const setValue = {
 	string: 'newValue',
diff --git a/packages/web3-core/test/unit/web3_context.test.ts b/packages/web3-core/test/unit/web3_context.test.ts
index b50c98e8661..6b3d211f2c6 100644
--- a/packages/web3-core/test/unit/web3_context.test.ts
+++ b/packages/web3-core/test/unit/web3_context.test.ts
@@ -124,6 +124,9 @@ describe('Web3Context', () => {
 			expect(newContext.requestManager).toBeInstanceOf(Web3RequestManager);
 			expect(newContext.config.defaultHardfork).toEqual(config.defaultHardfork);
 			expect(newContext.config.defaultNetworkId).toEqual(config.defaultNetworkId);
+			expect(newContext.requestManager.config.defaultHardfork).toEqual(
+				config.defaultHardfork,
+			);
 		});
 
 		describe('accountsProvider', () => {
diff --git a/packages/web3-eth/CHANGELOG.md b/packages/web3-eth/CHANGELOG.md
index 7d1470f593d..3e3454e63ef 100644
--- a/packages/web3-eth/CHANGELOG.md
+++ b/packages/web3-eth/CHANGELOG.md
@@ -267,7 +267,7 @@ Documentation:
 ### Fixed
 
 -   Adds transaction property to be an empty list rather than undefined when no transactions are included in the block (#7151)
--   Change method `getTransactionReceipt` to not be casted as `TransactionReceipt` to give proper return type (#7159)
+    w
 
 ## [Unreleased]
 
diff --git a/packages/web3-eth/test/fixtures/format_transaction.ts b/packages/web3-eth/test/fixtures/format_transaction.ts
index dc91dc7c823..5476efa90aa 100644
--- a/packages/web3-eth/test/fixtures/format_transaction.ts
+++ b/packages/web3-eth/test/fixtures/format_transaction.ts
@@ -210,6 +210,39 @@ export const numbersAsBigIntTransaction: FormatType<
 	s: '0x7e1941b264348e80c78c4027afc65a87b0a5e43e86742b8ca0823584c6788fd0',
 };
 
+export const customFieldTransaction: FormatType<
+	Transaction,
+	{ number: FMT_NUMBER.BIGINT; bytes: typeof DEFAULT_RETURN_FORMAT.bytes }
+> = {
+	from: '0xEB014f8c8B418Db6b45774c326A0E64C78914dC0',
+	to: '0x3535353535353535353535353535353535353535',
+	value: BigInt(100000000000),
+	gas: BigInt(21000),
+	gasPrice: BigInt(20000000000),
+	type: BigInt(0),
+	maxFeePerGas: BigInt(78000000000),
+	maxPriorityFeePerGas: BigInt(1230000000),
+	data: '0x',
+	nonce: BigInt(4),
+	chain: 'mainnet',
+	hardfork: 'berlin',
+	chainId: BigInt(1),
+	common: {
+		customChain: {
+			name: 'foo',
+			networkId: BigInt(4),
+			chainId: BigInt(66),
+		},
+		baseChain: 'mainnet',
+		hardfork: 'berlin',
+	},
+	gasLimit: BigInt(21000),
+	v: BigInt(37),
+	r: '0x4f4c17305743700648bc4f6cd3038ec6f6af0df73e31757007b7f59df7bee88d',
+	s: '0x7e1941b264348e80c78c4027afc65a87b0a5e43e86742b8ca0823584c6788fd0',
+	feeCurrency: '0x4242424242424242424242424242424242424242',
+};
+
 const dummyTransaction: Transaction = {
 	from: '0xEB014f8c8B418Db6b45774c326A0E64C78914dC0',
 	to: '0x3535353535353535353535353535353535353535',
diff --git a/packages/web3-eth/test/unit/format_transaction.test.ts b/packages/web3-eth/test/unit/format_transaction.test.ts
index c255fd6a1ae..8267868c616 100644
--- a/packages/web3-eth/test/unit/format_transaction.test.ts
+++ b/packages/web3-eth/test/unit/format_transaction.test.ts
@@ -25,8 +25,10 @@ import {
 	numbersAsStringTransaction,
 	numbersAsNumberTransaction,
 	bytesAsUint8ArrayTransaction,
+	customFieldTransaction,
 } from '../fixtures/format_transaction';
 import { objectBigintToString } from '../fixtures/system_test_utils';
+import { transactionSchema } from '../../src';
 
 const transactionsDataForNumberTypes: Record<FMT_NUMBER, Record<string, unknown>> = {
 	[FMT_NUMBER.BIGINT]: numbersAsBigIntTransaction,
@@ -117,7 +119,18 @@ describe('formatTransaction', () => {
 		);
 	});
 
-	it.todo('Accepts a custom schema', () => {
-		// TODO(nico):
+	it('Accepts a custom schema', () => {
+		expect(formatTransaction(customFieldTransaction).feeCurrency).toBeUndefined();
+		expect(
+			formatTransaction(customFieldTransaction, undefined, {
+				transactionSchema: {
+					...transactionSchema,
+					properties: {
+						...transactionSchema.properties,
+						feeCurrency: 'address',
+					},
+				},
+			}),
+		);
 	});
 });