When a payout or collection fails, it’s often not because the account has no funds—it’s because the payment instructions didn’t point to the right bank. In the United States, one small detail does a lot of the heavy lifting: the routing number.

Routing number: the bank’s “address” in the U.S. A routing number is a nine-digit code used by U.S. banking networks to identify which financial institution should receive or send funds. You may also hear it called an ABA routing number or routing transit number (RTN).

For businesses moving money through U.S. rails—especially ACH transfers, direct deposits, and some wire transfers—this number helps route transactions accurately so payments reach the right bank.

Common moments your company will be asked for it In day-to-day operations, routing numbers show up in a few predictable places. Here are the most DogPay-relevant scenarios:

1) Paying contractors, employees, or vendors via ACH If you’re sending bulk payouts to U.S. bank accounts (for example, contractor payments, marketplace seller settlements, or vendor invoices), payment forms typically require: Routing number (bank identifier) Account number (recipient’s specific account)

2) Collecting U.S. customer payments from a bank account If your business collects funds via bank transfer methods that rely on U.S. routing, your payer may need your routing number to set up one-time or recurring payments.

3) Setting up direct deposit inflows Businesses often use routing details to receive: Refunds Rebates Partner or platform payouts Other direct deposit credits

4) Initiating certain wire transfers Some banks use a routing number to identify the destination bank for domestic wires, while international wires usually rely on different identifiers (more on that below). Always follow the instructions provided by the sending bank.

5) Connecting bank accounts for transfers When linking accounts for treasury ops—moving funds between operating, payroll, and settlement accounts—routing numbers are commonly required during verification or setup.

Where to find a routing number Option A: On a paper check On standard U.S. checks, the routing number appears on the bottom left. You’ll usually see three groups of numbers: 1. Routing number (9 digits) 2. Account number 3. Check number (often shorter)

If anything looks unclear, confirm with the bank before using it.

Option B: In online or mobile banking Most banks list routing details inside your account information. 1. Log in to your bank’s online portal/app 2. Open Account details (or similar) 3. Locate the routing number shown near the account number

If your bank shows multiple routing numbers, choose the one that matches the payment type you’re setting up.

A practical reminder: routing numbers can differ by payment method Some financial institutions maintain different routing numbers depending on whether the transaction is: ACH (direct deposit / standard bank transfers) Wire transfer Specific regions or processing centers

For B2B payments, this matters because an ACH routing number entered for a wire (or vice versa) can cause delays, rejects, or manual repair work.

Routing number vs. account number (don’t mix these up) Routing number: identifies the bank- Account number: identifies the specific account at that bank

Both are usually required for bank-to-bank transfers.

What about international transfers? Routing numbers are primarily a U.S. banking identifier. For cross-border payments, banks commonly use other standards such as: SWIFT/BIC- IBAN (in many regions)

If you’re paying overseas suppliers or receiving international client funds, make sure you collect the correct set of banking details for that corridor.

Quick checklist before you submit bank details To reduce failed payments in vendor onboarding or payout workflows: Confirm whether the transfer is ACH or wire- Use the routing number specifically provided for that payment type Double-check the account number digit-by-digit If there’s uncertainty, verify with the recipient’s bank information source

Disclaimer: This article is for general informational purposes only and does not constitute financial, legal, or professional advice. Consult qualified professionals as needed. DogPay is not responsible for losses or liabilities arising from the use of this information.