What is an ABA routing number?

An ABA routing number is a unique nine-digit code that identifies a specific bank or credit union in the United States. The American Bankers Association introduced the system in 1910, which is why it carries the ABA name. You will also see it called a routing transit number (RTN), a cheque routing number, or a Fedwire number.

The job of the number is simple: it makes sure money moving by cheque, wire transfer, or direct deposit reaches the correct institution. Every US bank has at least one, the format is always nine digits, and that consistency is what keeps a payment from landing in the wrong place.

Here is where the number does its work:

• Electronic Fund Transfers (EFTs): When money moves electronically between banks, the ABA number points the funds at the right institution. Direct deposits, utility payments, and automatic monthly debits all rely on it. An employer, for example, uses it to deposit a paycheque straight into an account.
• ACH transactions: ACH stands for Automated Clearing House, the US network for batched electronic transfers like payroll and recurring payments. ACH and ABA numbers share the same nine-digit format but can serve different purposes, and a bank may assign a separate ACH routing number for electronic payments. ACH clears faster (same or next day) because it is processed in batches, unlike individually processed paper-cheque transfers. Always confirm which number applies.
• Wire transfers: "Routing number" is the general term for the nine-digit bank identifier; an ABA number is the specific US version used for domestic transactions, including wires. For a domestic US wire, the ABA number directs the funds. For an international transfer, it works alongside a SWIFT code. Every ABA number is a routing number, but not every routing number is an ABA number.

Why an Indian business ends up dealing with ABA numbers

Meera runs a design studio in Pune and invoices clients in New York. When a client pays her by wire, their US bank needs an ABA number to route the domestic US leg, and a SWIFT/BIC code to carry the payment across the border into India. That is the moment most Indian exporters, freelancers, and SaaS teams first run into the ABA number: not as account holders, but as the people receiving a US payment.

This is the practical distinction to hold on to. The ABA number lives inside the US banking system. For funds to actually reach an Indian account, the transfer relies on the SWIFT network and, on arrival, on documentation like a FIRA (Foreign Inward Remittance Advice, the proof that an inward payment came in). Knowing which code does what is how you stop chasing a payment that stalled halfway.

Where to find an ABA routing number

You do not need to be a banking expert to locate one. There are several reliable places to look.

On a US cheque. The routing number sits in the bottom-left corner, printed in magnetic ink so machines can read it. It appears on both personal and business cheques. Some cheques also carry a shorter fractional routing number near the top as a backup, but the primary nine-digit number is always at the bottom.

In online banking. Logged into a US bank account, the routing number appears in the account details or during any transaction setup. Scheduling an EFT usually shows the routing number right next to the account number in the transaction summary.

In a mobile banking app. Most apps list the ABA number under account details. In the Chase app, for instance, it sits under the "See full account detail" tab, so it is accessible from a phone.

On a bank statement. Mailed and digital statements often print the routing number at the top or bottom of the page near the account information, which is a useful backup when you are away from online banking.

Through a lookup tool. The Fedwire directory lets you retrieve an ABA number by entering a bank's name or location. Most major US banks also publish their routing numbers under the customer-service or FAQ section of their own websites, and apps like Fedwire Finder let you search on the go.

How to verify an ABA routing number before you transact

Accuracy here is not optional. A single wrong digit can misdirect a payment or leave it in limbo, neither received nor returned, while the banks trace it. For a time-sensitive payment like a bill or a loan settlement, that delay can mean penalties.

Two things make verification worth the extra minute:

• A wrong digit misroutes the money. The number identifies the destination institution. Get it wrong and the payment can go to the wrong bank or stall for days while it is traced and corrected.
• Some banks use more than one ABA number. A bank may hold one routing number for ACH transfers (direct deposits, recurring payments) and a different one for wires (same-day, large-value). Use the ACH number for a wire, or the reverse, and the transaction can fail or be delayed.

The safe habit is to confirm the correct number with the bank before starting any new type of payment.

What happens if the ABA number is wrong

The consequences run from mildly annoying to genuinely costly.

• Delayed transactions. An incorrect number can hold up a payment for verification or bounce it back, turning a quick transfer into a days-long wait.
• Bounced direct deposits. If a payer uses the wrong number for a direct deposit, the payment can return to the sender. The funds miss the account on time, and reprocessing adds further delay.
• Failed electronic payments. An error can mean the payment never leaves the account at all, because the system cannot locate the destination bank. For a subscription or bill, that can trigger overdue notices or service disruption.

The fix is boringly simple: double-check the number with the bank before you send.

Which ABA number to use for which transaction

Not every transaction uses the same ABA number. Match the number to the transaction type:

• Cheques: the number printed on a US cheque is the standard one for everyday personal banking.
• Direct deposits and electronic payments: some banks assign a separate routing number for automated transactions.
• Wire transfers: a bank may use a different routing number for wires, and domestic versus international routing can differ. For an international wire into India, the ABA number is paired with a SWIFT code.

When in doubt, ask the bank which number applies to your specific transaction type.

Receiving US payments into India without the friction

Knowing the codes is half the battle. The other half is getting the money into your Indian account quickly, at a good rate, with the paperwork sorted. That is where the receiving side matters more than the routing number itself.

PayGlocal is an RBI-authorised cross-border payments provider (a Payment Aggregator - Cross Border - Inward & Outward, PA-CB-I&O, and an Online Payment Aggregator, PA-O), and part of the ICICI Bank Group. For an Indian business collecting from US and global customers, that means a high Payment Success Rate on international cards, settlement in INR, and FIRA generated automatically so your export documentation is handled without the manual chase.