Definition
A routing number is the nine-digit code that identifies a US bank or credit union in domestic transfers. Together with an account number, it tells the payer's bank where to send money. Businesses include their routing and account numbers in invoice payment instructions so clients can pay by ACH or wire.
Also called: ABA routing number, Routing transit number, RTN
Routing number in practice
Some banks use different routing numbers for ACH transfers and for wire transfers. Check with your bank and label each clearly on the invoice, for example "ACH routing" and "Wire routing", so clients do not send a wire to the wrong number.
Routing numbers are for US domestic payments. International clients paying a US account usually need your bank's SWIFT code as well, and payments into most other countries use an IBAN instead.
Sharing a routing and account number lets people send money to you, but treat changes with care. Fraudsters often send fake "updated bank details" emails, so confirm any change by phone before relying on it.
Example
An invoice's payment section reads: "Pay by ACH: Bank of Example, routing 000000000, account 1234567890. Reference INV-0217."
Frequently Asked Questions
Is it safe to put my routing number on an invoice?
It is standard practice, since clients need it to pay you. Monitor your account and ask your bank about debit blocks or positive pay if you are concerned about unauthorized debits.
Where do I find my routing number?
On your checks, in your online banking account details, or on your bank's website. Confirm whether your bank uses a separate number for wires.
Related terms
- ACH transfer An ACH transfer is an electronic bank-to-bank payment in the United States sent through the Automated Clearing House network.
- Wire transfer A wire transfer is an electronic payment sent individually from one bank to another, usually settling the same day for domestic transfers and within one to five business days internationally.
- SWIFT code A SWIFT code, also called a BIC (Bank Identifier Code), is an 8 or 11 character code that identifies a specific bank and branch for international wire transfers.
- IBAN An IBAN (International Bank Account Number) is a standardized account identifier of up to 34 characters, starting with a two-letter country code, used for cross-border bank transfers in Europe and many other regions.
- Sort code A sort code is the six-digit number that identifies a UK bank and branch, usually written in three pairs such as 12-34-56.
- BSB number A BSB number is the six-digit code that identifies an Australian bank and branch, usually written in the format 123-456.
This page is for general information only and is not legal, tax, or financial advice. Rules change and vary by location, so consult a qualified lawyer or accountant about your situation.