ACH Routing Number: Meaning, Example & How to Find It

What Is an ACH Routing Number?

An ACH routing number is a nine-digit numeric code assigned to a US financial institution for processing electronic transactions. ACH stands for Automated Clearing House; it is a US-based network that moves money electronically between banks and financial institutions for direct deposits, bill payments, and fund transfers.

Think of it as the PIN code of a bank. Just as a PIN code tells the postal system which area to deliver a letter to, an ACH routing number tells the ACH network exactly which bank to send money to. Once the bank is identified, the account number identifies the individual account within that bank.

The American Bankers Association (ABA) assigns and maintains these numbers. That’s why you might hear your clients say ACH routing numbers as ABA routing numbers. While they are not wrong, ABA routing numbers are mostly used for paper cheques, and ACH routing numbers are used for electronic transfers. Because you will receive international payments online, you will need an ACH routing number and the bank account number.

What Is the Importance of an ACH Routing Number?

The importance of an ACH routing number is that it ensures electronic payments reach the right financial institution without manual intervention, enabling accurate fund routing, direct deposits, recurring payments, reduced errors and fraud, and fast, low-cost transfers. That's the top-level view of why it matters; here are the practical scenarios where it makes a difference:

For businesses, like your clients, the ACH routing number provides direct operational advantages. Payroll runs on time, vendor payments don't get stuck in manual queues, and every transaction is traceable through the ACH network's records.

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What Are ACH Routing Numbers Used For?

ACH routing numbers are used for payroll direct deposits, loan and mortgage repayments, utility bill payments, tax payments and refunds, charitable donations, personal and business transfers, B2B payments, eCommerce checkouts, and mobile payment apps. Here's how individuals and companies use them across each of these:

Payroll direct deposits: Companies transfer salaries into employee bank accounts via ACH. They only need the employee's bank ACH routing number and their bank account number.

Loan and mortgage repayments: Borrowers set up auto-debit instructions so lenders pull monthly payments directly from their accounts.

Utility bill payments: Consumers set an ACH and electricity, gas, water, and internet providers collect monthly fees automatically.

Tax payments and refunds: The IRS uses ACH to disburse federal tax refunds and accepts ACH-based payments for tax dues.

Charitable donations: Nonprofits and fundraising platforms process contributions from donors through ACH, which reduces card processing fees.

Personal and business fund transfers: ACH is also used to move money between checking and savings accounts, or between a personal and a business account.

B2B payments: Organizations pay suppliers, contractors, and vendors through ACH, which is a faster and‌ lower-cost alternative to issuing paper checks.

eCommerce checkouts: Online merchants offer ACH as a payment method, especially for high-value purchases to save on card fees.

Mobile payment apps: Platforms like Venmo use ACH to move money between users and linked bank accounts.

What Does an ACH Routing Number Look Like?

An ACH routing number has nine digits; it’s completely numeric, there are no letters or special characters.

For example, Bank of America's ACH routing number for electronic payments in certain states is 021000322. Their wire transfer routing number is entirely different 026009593.

A single bank can have multiple ABA routing numbers, each assigned to a specific transaction. The ACH routing number depends on the state where the account was first opened and not where the business or individual is located. It also varies according to the region, account, and transaction type within the same bank. The sender must always confirm the ACH routing number before any transfer.

Each digit in an ACH routing number has a meaning:

Example routing number: 021000089

Digits 1–2 (02): The first two digits identify the Federal Reserve Bank district where the institution is located. There are twelve Federal Reserve districts in the US; ACH-specific routing numbers often begin with digits in the 61–72 range.

Digits 3–4 (10): These two digits specify the Federal Reserve Bank branch or processing centre within that district.

Digits 5–8 (0008): These digits are the institution's unique identifier within its Federal Reserve district; this distinguishes one bank from another.

Digit 9 (9): The last digit is the check digit, calculated using a mathematical algorithm applied to the first eight digits. Its purpose is to verify that the routing number is valid and that no digits were entered incorrectly.

Check an ACH routing number here

Routing number versus account number:

You could confuse between an ACH routing number and a bank account number. Here are some tactics to help you identify which one is which:

Routing number (9 digits): Identifies the financial institution

Account number (8–12 digits, varies by bank): Identifies the individual account held at that institution

Both ‌numbers appear at the bottom of the paper check. The routing number is always the first nine digits on the bottom left, followed by the account number, and then the check number.

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Where to Find Your ACH Routing Number?

ACH Routing number on a paper check

You can find an ACH routing number at the bottom of a paper check, in an online banking portal, in a mobile banking app, on bank statements, on the bank's official website, through the ABA routing number lookup tool, in the Federal Reserve's Fedwire directory, or by phone. When your US-based client makes an ACH payment, they need to know where to look, and you can guide them so the money reaches your virtual USD account correctly. Here's a closer look at each:

Always confirm with your client or their bank that they are using the ACH-specific routing number. Using the wire routing number by mistake can cause the transfer to fail or incur higher fees.

ACH Routing Number, ABA Number, SWIFT Code & IFSC Code

You might get confused between the ACH Routing Number, ABA Number, SWIFT Code & IFSC Code when you’re dealing with a US client. Mixing them up can cause failed transfers, delays, or unexpected deductions.

Here is how they differ:

An ACH routing number and an ABA routing number are both nine-digit numeric codes, but they are not always the same. The ABA routing number is the broader category, created for paper check processing. The ACH routing number is a specific type of ABA number used for electronic transactions. Some banks use the same nine-digit number for both; always ask your client which number applies to electronic ACH transfers specifically.

A wire routing number ‌is used for real-time, high-value wire transfers between banks. For example, a bank might use one number for ACH direct deposits and a different number for domestic wire instructions. The payment may still go through if your client uses a wire routing number instead of an ACH routing number, but it will trigger a different and costlier processing path.

SWIFT codes are used for international transfers only. They have no role to play in domestic US ACH transactions. In the same way, ACH routing numbers cannot be used for a payment to a bank outside the US.

IFSC codes are the Indian equivalent of ACH routing numbers. It is assigned by the Reserve Bank of India, and made of an 11-character alphanumeric code identifying every Indian bank branch participating in NEFT, RTGS, and IMPS. It is entirely domestic and has no function in cross-border payments.

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How Do ACH Routing Numbers Work in Cross-Border Payments? An Example

In a cross-border payment, the ACH routing number tells your client's US bank which account to send funds to, routing the payment to your virtual USD account, from where the platform converts it to INR and settles it in your Indian bank account with a FIRC/FIRA issued as proof. Here's how it plays out with a real number.

Say a US client owes you $5,000 for a completed project:

How Does Skydo Help You Receive ACH Payments in India?

Skydo is an India-based payment platform. It provides virtual USD accounts to Indian freelancers or any business owner with US-based clients. Besides the account number, each account comes with its own ACH routing number, which you can share with clients to receive ACH payments.

Setting up Skydo only takes 15 minutes; there are no monthly subscription fees. You pay only when you transact.

Skydo charges a flat fee based on your transaction amount: under $2,000 = $19; $2,000–$10,000 = $29; over $10,000 = 0.3%. All-in-all your total fees stay under 2% compared to the 5%-10% that Indian banks or other platforms, like PayPal, charge.

After you receive an international payment, Skydo issues an FIRA automatically, which you download directly from your dashboard. An FIRA is a crucial RBI compliance document to prove you received an international payment in India.

From setting up a virtual account to track payments, you can do all that on your own without following up with your banking relationship manager or chasing clients for SWIFT copies. You get real-time visibility into your payments, so you always know when the funds will arrive in your bank account.

Besides USD, Skydo also supports virtual accounts in SGD, EUR, GBP, AUD, and CAD.

So if you’re an Indian freelancer or an exporter looking for a cost-effective alternative to banks that also provides free FIRA and real-time tracking, check out Skydo today.