ACH vs Wire Transfer Routing Numbers
Two Types of Electronic Transfers, Two Different Systems
When you send money electronically, you are almost certainly using one of two systems: ACH or Fedwire. Each system processes transactions differently, and some banks use different routing numbers for each. Using the wrong routing number can cause your transfer to fail or be rejected.
ACH Routing Numbers
ACH stands for Automated Clearing House. The ACH network is operated by Nacha (formerly NACHA — the National Automated Clearing House Association) and processes the vast majority of direct deposits, bill payments, and consumer bank transfers in the US. ACH transactions are processed in batches — typically one to three business days for standard ACH, or same-day for Same Day ACH.
ACH routing numbers come from the Federal Reserve's FedACH directory. Every financial institution that participates in the ACH network has an ACH routing number. For most people setting up direct deposit or paying bills online, this is the routing number to use.
Common uses for ACH routing numbers:
- Payroll direct deposit
- Social Security and government benefits
- Bill pay (utilities, insurance, subscriptions)
- Tax refunds and payments
- Person-to-person transfers (Venmo, Zelle, etc.)
Wire Transfer Routing Numbers
Wire transfers use the Fedwire Funds Service, operated by the Federal Reserve. Unlike ACH, wire transfers are processed individually and in real time — funds are available the same business day, often within hours. Wire transfers are used for large transactions and time-sensitive payments.
Not all banks have a separate wire routing number. Many banks use the same routing number for both ACH and wires. However, some large banks — particularly those with complex operations — use different routing numbers for each system. When wiring funds, always confirm the wire routing number with your bank directly.
Common uses for wire routing numbers:
- Real estate closings
- Large business-to-business payments
- International wire transfers (outbound leg)
- Brokerage and investment account funding
- Time-sensitive transfers of $10,000 or more
Which Routing Number Should You Use?
For most everyday transactions — setting up direct deposit, paying bills, or sending money to another person — use the ACH routing number. If you are wiring a large sum of money, especially for a real estate closing or business transaction, confirm the wire routing number with your bank. Many banks list both on their website or on your bank statement.
If you are unsure which routing number to use, call your bank's customer service line before initiating the transfer. Using the wrong routing number can delay your transfer or result in funds being returned or misdirected.
How to Find the Right Routing Number
You can look up a routing number using the search tool on this site. Each routing number page shows the institution name, address, and the transaction types the number supports. You can also find your routing number on the bottom of a check — it is the nine-digit number in the lower-left corner.