diff --git a/packages/web3-eth/src/utils/format_transaction.ts b/packages/web3-eth/src/utils/format_transaction.ts
index d8447dcfde2..ac97f45b3a0 100644
--- a/packages/web3-eth/src/utils/format_transaction.ts
+++ b/packages/web3-eth/src/utils/format_transaction.ts
@@ -40,18 +40,19 @@ export function formatTransaction<
 
 	formattedTransaction = format(options.transactionSchema, formattedTransaction, returnFormat);
 
-	if (
-		!isNullish(formattedTransaction.data) &&
-		!isNullish(formattedTransaction.input) &&
-		formattedTransaction.data !== formattedTransaction.input
-	)
-		throw new TransactionDataAndInputError({
-			data: bytesToHex(formattedTransaction.data),
-			input: bytesToHex(formattedTransaction.input),
-		});
-	else if (!isNullish(formattedTransaction.data)) {
+	if (!isNullish(formattedTransaction.data)) {
+		if (
+			!isNullish(formattedTransaction.input) &&
+			formattedTransaction.data !== formattedTransaction.input
+		)
+			throw new TransactionDataAndInputError({
+				data: bytesToHex(formattedTransaction.data),
+				input: bytesToHex(formattedTransaction.input),
+			});
+
 		formattedTransaction.input = formattedTransaction.data;
-		delete formattedTransaction.data;
+	} else if (!isNullish(formattedTransaction.input)) {
+		formattedTransaction.data = formattedTransaction.input;
 	}
 
 	if (!isNullish(formattedTransaction.gasLimit)) {
diff --git a/packages/web3-eth/src/utils/transaction_builder.ts b/packages/web3-eth/src/utils/transaction_builder.ts
index 310a16fa401..eff5eb6a023 100644
--- a/packages/web3-eth/src/utils/transaction_builder.ts
+++ b/packages/web3-eth/src/utils/transaction_builder.ts
@@ -44,7 +44,7 @@ import {
 	TransactionDataAndInputError,
 	UnableToPopulateNonceError,
 } from 'web3-errors';
-import { format } from 'web3-utils';
+import { bytesToHex, format } from 'web3-utils';
 import { NUMBER_DATA_FORMAT } from '../constants';
 // eslint-disable-next-line import/no-cycle
 import { getChainId, getTransactionCount } from '../rpc_method_wrappers';
@@ -158,20 +158,28 @@ export async function defaultTransactionBuilder<ReturnType = Transaction>(option
 		populatedTransaction.value = '0x';
 	}
 
-	if (!isNullish(populatedTransaction.data) && !isNullish(populatedTransaction.input)) {
-		throw new TransactionDataAndInputError({
-			data: populatedTransaction.data,
-			input: populatedTransaction.input,
-		});
-	} else if (!isNullish(populatedTransaction.data)) {
+	if (!isNullish(populatedTransaction.data)) {
+		if (
+			!isNullish(populatedTransaction.input) &&
+			populatedTransaction.data !== populatedTransaction.input
+		)
+			throw new TransactionDataAndInputError({
+				data: bytesToHex(populatedTransaction.data),
+				input: bytesToHex(populatedTransaction.input),
+			});
+
+		if (!populatedTransaction.data.startsWith('0x'))
+			populatedTransaction.data = `0x${populatedTransaction.data}`;
+
 		populatedTransaction.input = populatedTransaction.data;
-		delete populatedTransaction.data;
-	}
+	} else if (!isNullish(populatedTransaction.input)) {
+		if (!populatedTransaction.input.startsWith('0x'))
+			populatedTransaction.input = `0x${populatedTransaction.input}`;
 
-	if (isNullish(populatedTransaction.input) || populatedTransaction.input === '') {
+		populatedTransaction.data = populatedTransaction.input;
+	} else {
 		populatedTransaction.input = '0x';
-	} else if (!populatedTransaction.input.startsWith('0x')) {
-		populatedTransaction.input = `0x${populatedTransaction.input}`;
+		populatedTransaction.data = '0x';
 	}
 
 	if (isNullish(populatedTransaction.common)) {
diff --git a/packages/web3-eth/test/integration/web3_eth/send_transaction.test.ts b/packages/web3-eth/test/integration/web3_eth/send_transaction.test.ts
index 33271ae3101..4a208fb9795 100644
--- a/packages/web3-eth/test/integration/web3_eth/send_transaction.test.ts
+++ b/packages/web3-eth/test/integration/web3_eth/send_transaction.test.ts
@@ -180,6 +180,7 @@ describe('Web3Eth.sendTransaction', () => {
 			const transaction: Transaction = {
 				from: tempAcc.address,
 				data: greeterContractDeploymentData,
+				input: greeterContractDeploymentData,
 				gas: BigInt('475520'),
 			};
 			const response = await web3Eth.sendTransaction(transaction);
@@ -203,6 +204,7 @@ describe('Web3Eth.sendTransaction', () => {
 				from: tempAcc.address,
 				to: greeterContractAddress,
 				data: contractFunctionCall,
+				input: contractFunctionCall,
 			};
 			const response = await web3Eth.sendTransaction(transaction);
 			expect(response.status).toBe(BigInt(1));
diff --git a/packages/web3-eth/test/unit/default_transaction_builder.test.ts b/packages/web3-eth/test/unit/default_transaction_builder.test.ts
index a07eae51ee8..c4df9973786 100644
--- a/packages/web3-eth/test/unit/default_transaction_builder.test.ts
+++ b/packages/web3-eth/test/unit/default_transaction_builder.test.ts
@@ -29,6 +29,7 @@ import { ethRpcMethods } from 'web3-rpc-methods';
 
 import {
 	Eip1559NotSupportedError,
+	TransactionDataAndInputError,
 	UnableToPopulateNonceError,
 	UnsupportedTransactionTypeError,
 } from 'web3-errors';
@@ -210,28 +211,44 @@ describe('defaultTransactionBuilder', () => {
 		});
 	});
 
-	describe('should populate input', () => {
+	describe('should populate input/data', () => {
 		it('should populate with 0x', async () => {
 			const input = { ...transaction };
 			delete input.input;
+			delete input.data;
 
 			const result = await defaultTransactionBuilder({
 				transaction: input,
 				web3Context,
 			});
 			expect(result.input).toBe('0x');
+			expect(result.data).toBe('0x');
 		});
 
 		it('should prefix with 0x', async () => {
 			const input = { ...transaction };
-			delete input.data;
 			input.input = '123';
+			input.data = '123';
 
 			const result = await defaultTransactionBuilder({
 				transaction: input,
 				web3Context,
 			});
 			expect(result.input).toBe('0x123');
+			expect(result.data).toBe('0x123');
+		});
+
+		it('should throw TransactionDataAndInputError', async () => {
+			const input = { ...transaction };
+			input.data = '0x3211';
+			input.input = '0x1233';
+
+			await expect(
+				defaultTransactionBuilder({
+					transaction: input,
+					web3Context,
+				}),
+			).rejects.toThrow(TransactionDataAndInputError);
 		});
 	});
 
diff --git a/tools/web3-plugin-example/test/unit/contract_method_wrappers.test.ts b/tools/web3-plugin-example/test/unit/contract_method_wrappers.test.ts
index f5998f5ab1f..0351a695e53 100644
--- a/tools/web3-plugin-example/test/unit/contract_method_wrappers.test.ts
+++ b/tools/web3-plugin-example/test/unit/contract_method_wrappers.test.ts
@@ -69,6 +69,7 @@ describe('CustomRpcMethodsPlugin Tests', () => {
 				params: [
 					{
 						input: '0x70a082310000000000000000000000008da5e39ec14b57fb9bcd9aa2b4500e909119795d',
+						data: '0x70a082310000000000000000000000008da5e39ec14b57fb9bcd9aa2b4500e909119795d',
 						to: '0xdAC17F958D2ee523a2206206994597C13D831ec7',
 					},
 					'latest',
@@ -102,6 +103,7 @@ describe('CustomRpcMethodsPlugin Tests', () => {
 				params: [
 					{
 						input: '0xa9059cbb0000000000000000000000004f641def1e7845caab95ac717c80416082430d0d000000000000000000000000000000000000000000000000000000000000002a',
+						data: '0xa9059cbb0000000000000000000000004f641def1e7845caab95ac717c80416082430d0d000000000000000000000000000000000000000000000000000000000000002a',
 						from: sender,
 						gasPrice: expectedGasPrice,
 						maxFeePerGas: undefined,