An ABA transit number is a 9-digit bank routing number used in the U.S. to identify a financial institution for payments like direct deposit, ACH transfers, and checks.

Quick Scoop

  • Same thing as a routing number: “ABA number,” “ABA transit number,” and “routing number” are commonly used to mean the same 9-digit code.
  • What it does: It helps banks route money to the correct institution during electronic and paper transactions.
  • Where to find it: Usually on the bottom left of a check, or in your bank’s online account details.

Example use

If your employer sets up direct deposit, they may ask for your ABA transit number so the payment reaches your bank correctly.

Bottom line

If someone asks for your “transit ABA number,” they usually mean your bank’s routing number.