diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6714ae042fa..46c0eefe645 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2728,3 +2728,9 @@ If there are any bugs, improvements, optimizations or any new feature proposal f
 -   The callback function provided to the static `Web3.onNewProviderDiscovered` function expects a parameter of type `EIP6963ProvidersMapUpdateEvent` as opposed to `EIP6963AnnounceProviderEvent`. (#7242)
 
 ## [Unreleased]
+
+### Changed
+
+#### web3-eth
+
+-   Allow `getEthereumjsTxDataFrom` to return additional fields that may be passed if using a `customTransactionSchema`.
diff --git a/packages/web3-eth/CHANGELOG.md b/packages/web3-eth/CHANGELOG.md
index e75b0f867b2..71fd65e4f9e 100644
--- a/packages/web3-eth/CHANGELOG.md
+++ b/packages/web3-eth/CHANGELOG.md
@@ -280,3 +280,7 @@ Documentation:
 -   Adds the same `{transactionSchema?: ValidationSchemaInput}` that exists in `formatTransaction` to `validateTransactionForSigning`
 
 ## [Unreleased]
+
+### Changed
+
+-   Allow `getEthereumjsTxDataFrom` to return additional fields that may be passed if using a `customTransactionSchema`.
diff --git a/packages/web3-eth/src/utils/prepare_transaction_for_signing.ts b/packages/web3-eth/src/utils/prepare_transaction_for_signing.ts
index cd70e1e265c..a90ce32173d 100644
--- a/packages/web3-eth/src/utils/prepare_transaction_for_signing.ts
+++ b/packages/web3-eth/src/utils/prepare_transaction_for_signing.ts
@@ -37,6 +37,7 @@ import { transactionBuilder } from './transaction_builder.js';
 const getEthereumjsTxDataFromTransaction = (
 	transaction: FormatType<PopulatedUnsignedTransaction, typeof ETH_DATA_FORMAT>,
 ) => ({
+	...transaction,
 	nonce: transaction.nonce,
 	gasPrice: transaction.gasPrice,
 	gasLimit: transaction.gasLimit ?? transaction.gas,
diff --git a/packages/web3-eth/test/unit/prepare_transaction_for_signing.test.ts b/packages/web3-eth/test/unit/prepare_transaction_for_signing.test.ts
index ce83a505d17..e0955db8fac 100644
--- a/packages/web3-eth/test/unit/prepare_transaction_for_signing.test.ts
+++ b/packages/web3-eth/test/unit/prepare_transaction_for_signing.test.ts
@@ -28,9 +28,13 @@ import {
 	FeeMarketEIP1559Transaction,
 	Transaction,
 	Hardfork,
+	TypedTransaction,
+	TransactionFactory,
 } from 'web3-eth-accounts';
 import { prepareTransactionForSigning } from '../../src/utils/prepare_transaction_for_signing';
 import { validTransactions } from '../fixtures/prepare_transaction_for_signing';
+import { transactionSchema } from '../../src/schemas';
+import { CustomFieldTransaction } from '../fixtures/format_transaction';
 
 describe('prepareTransactionForSigning', () => {
 	const web3Context = new Web3Context<EthExecutionAPI>({
@@ -317,4 +321,52 @@ describe('prepareTransactionForSigning', () => {
 			},
 		);
 	});
+
+	it('should not remove extra fields when using a custom schema', async () => {
+		const context = new Web3Context<EthExecutionAPI>({
+			provider: new HttpProvider('http://127.0.0.1'),
+			config: {
+				defaultNetworkId: '0x1',
+				customTransactionSchema: {
+					type: 'object',
+					properties: {
+						...transactionSchema.properties,
+						feeCurrency: { format: 'address' },
+					},
+				},
+			},
+		});
+
+		async function transactionBuilder<ReturnType = TransactionType>(options: {
+			transaction: TransactionType;
+			web3Context: Web3Context<EthExecutionAPI & Web3NetAPI>;
+			privateKey?: HexString | Uint8Array;
+			fillGasPrice?: boolean;
+			fillGasLimit?: boolean;
+		}): Promise<ReturnType> {
+			const tx = { ...options.transaction };
+			return tx as unknown as ReturnType;
+		}
+
+		context.transactionBuilder = transactionBuilder;
+
+		const spy = jest.spyOn(TransactionFactory, 'fromTxData');
+		(await prepareTransactionForSigning(
+			{
+				chainId: 1458,
+				nonce: 1,
+				gasPrice: BigInt(20000000000),
+				gasLimit: BigInt(21000),
+				to: '0xF0109fC8DF283027b6285cc889F5aA624EaC1F55',
+				from: '0x2c7536E3605D9C16a7a3D7b1898e529396a65c23',
+				value: '1000000000',
+				input: '',
+				feeCurrency: '0x1234567890123456789012345678901234567890',
+			} as CustomFieldTransaction,
+			context,
+		)) as TypedTransaction & { feeCurrency: string };
+
+		// @ts-expect-error feeCurrency is a custom field for testing here
+		expect(spy.mock.lastCall[0].feeCurrency).toBe('0x1234567890123456789012345678901234567890');
+	});
 });
diff --git a/packages/web3/test/fixtures/tx-type-15/index.ts b/packages/web3/test/fixtures/tx-type-15/index.ts
index 8dd34b35e25..1d7dd778067 100644
--- a/packages/web3/test/fixtures/tx-type-15/index.ts
+++ b/packages/web3/test/fixtures/tx-type-15/index.ts
@@ -32,9 +32,9 @@ import {
 	AccessList,
 	AccessListUint8Array,
 	FeeMarketEIP1559TxData,
-	FeeMarketEIP1559ValuesArray,
 	JsonTx,
 	TxOptions,
+	TxValuesArray,
 } from 'web3-eth-accounts';
 
 const { getAccessListData, getAccessListJSON, getDataFeeEIP2930, verifyAccessList } = txUtils;
@@ -43,6 +43,26 @@ const MAX_INTEGER = BigInt('0xffffffffffffffffffffffffffffffffffffffffffffffffff
 export const TRANSACTION_TYPE = 15;
 const TRANSACTION_TYPE_UINT8ARRAY = hexToBytes(TRANSACTION_TYPE.toString(16).padStart(2, '0'));
 
+type CustomFieldTxValuesArray = [
+	Uint8Array,
+	Uint8Array,
+	Uint8Array,
+	Uint8Array,
+	Uint8Array,
+	Uint8Array,
+	Uint8Array,
+	Uint8Array,
+	AccessListUint8Array,
+	Uint8Array,
+	Uint8Array?,
+	Uint8Array?,
+	Uint8Array?,
+];
+
+type SomeNewTxTypeTxData = FeeMarketEIP1559TxData & {
+	customTestField: bigint;
+};
+
 /**
  * Typed transaction with a new gas fee market mechanism
  *
@@ -50,12 +70,13 @@ const TRANSACTION_TYPE_UINT8ARRAY = hexToBytes(TRANSACTION_TYPE.toString(16).pad
  * - EIP: [EIP-1559](https://eips.ethereum.org/EIPS/eip-1559)
  */
 // eslint-disable-next-line no-use-before-define
-export class SomeNewTxTypeTransaction extends BaseTransaction<FeeMarketEIP1559Transaction> {
+export class SomeNewTxTypeTransaction extends BaseTransaction<SomeNewTxTypeTransaction> {
 	public readonly chainId: bigint;
 	public readonly accessList: AccessListUint8Array;
 	public readonly AccessListJSON: AccessList;
 	public readonly maxPriorityFeePerGas: bigint;
 	public readonly maxFeePerGas: bigint;
+	public readonly customTestField: bigint;
 
 	public readonly common: Common;
 
@@ -77,7 +98,7 @@ export class SomeNewTxTypeTransaction extends BaseTransaction<FeeMarketEIP1559Tr
 	 * - `chainId` will be set automatically if not provided
 	 * - All parameters are optional and have some basic default values
 	 */
-	public static fromTxData(txData: FeeMarketEIP1559TxData, opts: TxOptions = {}) {
+	public static fromTxData(txData: SomeNewTxTypeTxData, opts: TxOptions = {}) {
 		return new SomeNewTxTypeTransaction(txData, opts);
 	}
 
@@ -110,10 +131,10 @@ export class SomeNewTxTypeTransaction extends BaseTransaction<FeeMarketEIP1559Tr
 	 * Format: `[chainId, nonce, maxPriorityFeePerGas, maxFeePerGas, gasLimit, to, value, data,
 	 * accessList, signatureYParity, signatureR, signatureS]`
 	 */
-	public static fromValuesArray(values: FeeMarketEIP1559ValuesArray, opts: TxOptions = {}) {
-		if (values.length !== 9 && values.length !== 12) {
+	public static fromValuesArray(values: CustomFieldTxValuesArray, opts: TxOptions = {}) {
+		if (values.length !== 10 && values.length !== 13) {
 			throw new Error(
-				'Invalid EIP-1559 transaction. Only expecting 9 values (for unsigned tx) or 12 values (for signed tx).',
+				'Invalid CUSTOM TEST transaction. Only expecting 10 values (for unsigned tx) or 13 values (for signed tx).',
 			);
 		}
 
@@ -127,6 +148,7 @@ export class SomeNewTxTypeTransaction extends BaseTransaction<FeeMarketEIP1559Tr
 			value,
 			data,
 			accessList,
+			customTestField,
 			v,
 			r,
 			s,
@@ -144,7 +166,7 @@ export class SomeNewTxTypeTransaction extends BaseTransaction<FeeMarketEIP1559Tr
 			s,
 		});
 
-		return new FeeMarketEIP1559Transaction(
+		return new SomeNewTxTypeTransaction(
 			{
 				chainId: uint8ArrayToBigInt(chainId),
 				nonce,
@@ -155,6 +177,7 @@ export class SomeNewTxTypeTransaction extends BaseTransaction<FeeMarketEIP1559Tr
 				value,
 				data,
 				accessList: accessList ?? [],
+				customTestField: uint8ArrayToBigInt(customTestField),
 				v: v !== undefined ? uint8ArrayToBigInt(v) : undefined, // EIP2930 supports v's with value 0 (empty Uint8Array)
 				r,
 				s,
@@ -170,12 +193,13 @@ export class SomeNewTxTypeTransaction extends BaseTransaction<FeeMarketEIP1559Tr
 	 * the static factory methods to assist in creating a Transaction object from
 	 * varying data types.
 	 */
-	public constructor(txData: FeeMarketEIP1559TxData, opts: TxOptions = {}) {
+	public constructor(txData: SomeNewTxTypeTxData, opts: TxOptions = {}) {
 		super({ ...txData, type: TRANSACTION_TYPE }, opts);
-		const { chainId, accessList, maxFeePerGas, maxPriorityFeePerGas } = txData;
+		const { chainId, accessList, maxFeePerGas, maxPriorityFeePerGas, customTestField } = txData;
 
 		this.common = this._getCommon(opts.common, chainId);
 		this.chainId = this.common.chainId();
+		this.customTestField = customTestField;
 
 		if (!this.common.isActivatedEIP(1559)) {
 			throw new Error('EIP-1559 not enabled on Common');
@@ -272,7 +296,7 @@ export class SomeNewTxTypeTransaction extends BaseTransaction<FeeMarketEIP1559Tr
 	 * signature parameters `v`, `r` and `s` for encoding. For an EIP-155 compliant
 	 * representation for external signing use {@link FeeMarketEIP1559Transaction.getMessageToSign}.
 	 */
-	public raw(): FeeMarketEIP1559ValuesArray {
+	public raw(): TxValuesArray {
 		return [
 			bigIntToUnpaddedUint8Array(this.chainId),
 			bigIntToUnpaddedUint8Array(this.nonce),
@@ -283,10 +307,11 @@ export class SomeNewTxTypeTransaction extends BaseTransaction<FeeMarketEIP1559Tr
 			bigIntToUnpaddedUint8Array(this.value),
 			this.data,
 			this.accessList,
+			bigIntToUnpaddedUint8Array(this.customTestField),
 			this.v !== undefined ? bigIntToUnpaddedUint8Array(this.v) : Uint8Array.from([]),
 			this.r !== undefined ? bigIntToUnpaddedUint8Array(this.r) : Uint8Array.from([]),
 			this.s !== undefined ? bigIntToUnpaddedUint8Array(this.s) : Uint8Array.from([]),
-		];
+		] as TxValuesArray;
 	}
 
 	/**
@@ -384,7 +409,7 @@ export class SomeNewTxTypeTransaction extends BaseTransaction<FeeMarketEIP1559Tr
 	public _processSignature(v: bigint, r: Uint8Array, s: Uint8Array) {
 		const opts = { ...this.txOptions, common: this.common };
 
-		return FeeMarketEIP1559Transaction.fromTxData(
+		return SomeNewTxTypeTransaction.fromTxData(
 			{
 				chainId: this.chainId,
 				nonce: this.nonce,
@@ -395,6 +420,7 @@ export class SomeNewTxTypeTransaction extends BaseTransaction<FeeMarketEIP1559Tr
 				value: this.value,
 				data: this.data,
 				accessList: this.accessList,
+				customTestField: this.customTestField,
 				v: v - BigInt(27), // This looks extremely hacky: /util actually adds 27 to the value, the recovery bit is either 0 or 1.
 				r: uint8ArrayToBigInt(r),
 				s: uint8ArrayToBigInt(s),
diff --git a/packages/web3/test/integration/web3-plugin-add-tx.test.ts b/packages/web3/test/integration/web3-plugin-add-tx.test.ts
index 9b5bad43fa1..505862a4eeb 100644
--- a/packages/web3/test/integration/web3-plugin-add-tx.test.ts
+++ b/packages/web3/test/integration/web3-plugin-add-tx.test.ts
@@ -18,6 +18,7 @@ along with web3.js.  If not, see <http://www.gnu.org/licenses/>.
 /* eslint-disable @typescript-eslint/no-magic-numbers */
 
 import { Transaction, Web3Account } from 'web3-eth-accounts';
+import { transactionSchema } from 'web3-eth';
 import { SupportedProviders, Web3, Web3PluginBase } from '../../src';
 import {
 	createAccount,
@@ -51,6 +52,14 @@ describe('Add New Tx as a Plugin', () => {
 	});
 	it('should receive correct type of tx', async () => {
 		web3.registerPlugin(new Eip4844Plugin());
+		web3.config.customTransactionSchema = {
+			type: 'object',
+			properties: {
+				...transactionSchema.properties,
+				customField: { format: 'string' },
+			},
+		};
+		web3.eth.config.customTransactionSchema = web3.config.customTransactionSchema;
 		const tx = {
 			from: account1.address,
 			to: account2.address,
@@ -58,16 +67,21 @@ describe('Add New Tx as a Plugin', () => {
 			type: TRANSACTION_TYPE,
 			maxPriorityFeePerGas: BigInt(5000000),
 			maxFeePerGas: BigInt(5000000),
+			customField: BigInt(42),
 		};
 		const sub = web3.eth.sendTransaction(tx);
 
-		const waitForEvent: Promise<Transaction> = new Promise(resolve => {
-			// eslint-disable-next-line @typescript-eslint/no-floating-promises
-			sub.on('sending', txData => {
-				resolve(txData as unknown as Transaction);
-			});
-		});
-		expect(Number((await waitForEvent).type)).toBe(TRANSACTION_TYPE);
+		const waitForEvent: Promise<Transaction & { customField: bigint }> = new Promise(
+			resolve => {
+				// eslint-disable-next-line @typescript-eslint/no-floating-promises
+				sub.on('sending', txData => {
+					resolve(txData as unknown as Transaction & { customField: bigint });
+				});
+			},
+		);
+		const { type, customField } = await waitForEvent;
+		expect(Number(type)).toBe(TRANSACTION_TYPE);
+		expect(BigInt(customField)).toBe(BigInt(42));
 		await expect(sub).rejects.toThrow();
 	});
 });