A routing number is the 9-digit code that identifies your bank in the US payment system. You need it for direct deposits, ACH transfers, wire transfers, and setting up automatic bill payments. Here’s everything you need to know.
Routing Numbers by Major Bank (2026)
| Bank | Primary Routing Number | Notes |
|---|---|---|
| Chase | 021000021 (NY) | Varies by state — see full list |
| Bank of America | 026009593 (East) | Varies by state |
| Wells Fargo | 121042882 | Most accounts |
| Citibank | 021000089 | Most accounts |
| US Bank | 091000022 | Most accounts |
| PNC Bank | 043000096 | Most accounts |
| Capital One | 051405515 | Most accounts |
| TD Bank | 011103093 | Most accounts |
| Ally Bank | 124003116 | Single routing number |
| Marcus by Goldman Sachs | 124085066 | Single routing number |
| SoFi Bank | 084015416 | Single routing number |
| Discover Bank | 031100649 | Single routing number |
Important: Large national banks have multiple routing numbers by state. Always use the routing number assigned to the state where you originally opened your account.
What Is a Routing Number?
Routing numbers were created by the American Bankers Association in 1910 to sort, bundle, and ship paper checks between banks. Today they serve the same purpose electronically — routing ACH transfers and wire instructions to the correct financial institution.
The technical name is ABA routing transit number (RTN). Each 9-digit number encodes:
- Digits 1–4: Federal Reserve routing symbol (identifies which Fed district processes the transaction)
- Digits 5–8: Institution identifier (unique to your bank)
- Digit 9: Check digit (mathematical verification that the first 8 digits are correct)
A worked example
On a $1,200 direct deposit from your employer, the payroll system uses your routing number to direct funds to the correct bank. The bank then uses your account number to deposit funds into your specific account. Without either number, the payment cannot be processed.
How to Find Your Routing Number
1. On a paper check — The bottom-left 9-digit number is your routing number. The next set of numbers is your account number. The shorter number at the far right is the check number.
2. In your bank’s app — Open the app, navigate to your account details or account information screen. Most banks show the routing number directly. Chase and BofA label it “routing number” or “ABA number.”
3. On your bank’s website — Search your bank’s site for “routing number.” Most publish them on customer service pages. Ally, Marcus, and Discover publish their single routing numbers prominently.
4. By calling customer service — Routing numbers are public information. Any bank representative will confirm your routing number without requiring account verification.
Routing Numbers vs. Account Numbers
| Feature | Routing Number | Account Number |
|---|---|---|
| What it identifies | The bank | Your specific account |
| Length | Always 9 digits | 10–17 digits (varies) |
| Same for all customers? | Yes (or by state) | No — unique per account |
| Public information? | Yes | No — keep private |
| Needed for direct deposit? | Yes | Yes |
| Changes when you move? | Sometimes | No |
When You Need Your Routing Number
| Purpose | Routing Number Needed? | Account Number Needed? |
|---|---|---|
| Setting up direct deposit | Yes | Yes |
| Receiving an ACH payment | Yes | Yes |
| Sending or receiving a wire transfer | Yes (ABA for domestic) | Yes |
| Setting up autopay (bills, loans) | Yes | Yes |
| Writing a check | Printed on check already | Printed on check already |
| Zelle / Venmo / Cash App | No | No |
| Receiving an international wire | SWIFT code instead | Yes |
Important: Some banks publish separate routing numbers for ACH transfers versus wire transfers. Wells Fargo and a handful of other large banks use different routing numbers for each payment type. When in doubt, call your bank and specify whether you need the ACH routing number or the wire routing number.
What Happens If You Use the Wrong Routing Number?
For direct deposit: The payment fails and returns to the sender within 1–3 business days. Your employer’s payroll team will notify you and re-issue the payment once you provide correct information. No money is lost, but you may face a delay of one full pay cycle.
For ACH payment setup (autopay): The ACH transaction is rejected and returned. You’ll receive a failed payment notice and may face a returned payment fee from the biller ($15–$35). Contact the biller immediately and correct the banking information.
For a wire transfer: Wires are the highest-risk scenario. If an incorrect routing number routes a wire to a different real bank, recovery depends on whether the receiving bank can locate the funds in a suspense account. Act within minutes — call your bank’s wire department to initiate a recall. Once the receiving bank confirms and credits a matching account, reversal is not guaranteed.
Worked example: Maria sets up direct deposit with her new employer and accidentally transposes two digits in her routing number (writes 021000021 instead of 021000021 — an easy typo). Her first paycheck fails and is returned to her employer on day 2. She corrects the routing number; her next check arrives normally. She was not charged any fees, but experienced a one-pay-cycle delay.
Is It Safe to Share Your Routing Number?
Your routing number is public information — it appears on every check you write and is listed in the publicly accessible ABA routing number registry. Sharing it alone poses minimal risk.
However, your routing number combined with your account number is sensitive. Together, these two numbers are all someone needs to initiate an ACH debit from your account. Fraudulent ACH debits are reversible under Regulation E if reported within 60 days, but the process takes time and causes temporary disruption.
Safe to share: Your routing number (and account number) with a verified employer for direct deposit, government agencies for tax refunds, or financial institutions where you’re setting up an authorized payment.
Never share: Both numbers with anyone who contacts you unsolicited by phone, email, or text. Legitimate institutions do not call you and ask for your banking details unprompted. If someone claiming to be from your bank asks for your routing and account numbers, hang up and call the number on the back of your card.
Routing Number Articles in This Cluster
Routing Numbers by Bank — Full List
State-by-state routing numbers for Chase, Bank of America, Wells Fargo, Citi, US Bank, PNC, and 30+ more institutions.
What Is a Routing Number?
Plain-language explanation of what routing numbers are, why they exist, and how the 9-digit code is structured.
Routing Number vs. Account Number
Side-by-side comparison of these two numbers — what each does, where to find them, and when you need both.
How to Find Your Routing Number
Step-by-step instructions for finding your routing number on a check, in your app, and on your bank’s website.
Routing Numbers Explained (Simple Guide)
A simplified explanation for first-time banking customers and anyone setting up direct deposit for the first time.
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