IRS code 310 means your refund was issued as a check mailed to the address on file with the IRS
When you see "310" on your IRS refund status or correspondence, it identifies the method the IRS used to send your money. Code 310 specifically means the IRS printed a paper check and mailed it to you. This is one of three ways the IRS can deliver a refund — the other two are direct deposit (code 030) and a debit card (code 021).
The IRS assigns these codes internally to track how refunds move through their system. You might see 310 in your IRS account on IRS.gov, in a letter the IRS sends you, or when you call the IRS refund line. It tells you what to expect and where to look for your money.
Key Takeaways
- Code 310 means your refund is coming as a mailed check, not direct deposit or a debit card.
- Checks typically arrive 7 to 10 business days after the IRS issues them, though mail delivery can add time depending on where you live.
- If you provided a current mailing address on your tax return, the check will go there; if that address is wrong, the check may be returned to the IRS.
- A lost or undelivered check can be replaced, but you will need to contact the IRS and wait for a new one to be issued and mailed.
- If you want your refund by direct deposit instead, you can update your banking information on IRS.gov before the check is mailed.
How the IRS decides which refund method to use
The IRS does not ask you which method you prefer when you file your return. Instead, the method depends on how you filed and what information you provided. If you filed electronically and included your bank account information for direct deposit, the IRS will send your refund that way. If you filed on paper or did not provide banking details, the IRS defaults to mailing a check — which is code 310.
Some taxpayers choose the paper check method deliberately because they do not have a bank account or prefer not to share banking information with the IRS. Others end up with code 310 because they filed by mail or because their direct deposit information was incomplete or incorrect. Either way, once the IRS has issued the check, the method is locked in and cannot be changed for that refund.
When your check will arrive after code 310 is issued
The timeline depends on two separate stages: when the IRS issues the check, and how long the check takes to reach you by mail. The IRS typically issues refund checks within 21 days of processing your return, though this varies depending on whether your return was selected for review or contained errors that needed correction. Once the check is issued and mailed, standard mail delivery usually takes 7 to 10 business days, but can take longer depending on your location and current mail volume.
If you filed early in the tax season (January or February), your check may arrive faster because the IRS is processing fewer returns. If you filed closer to the April important date, processing times are longer and mail delivery may also be slower. Weather, holidays, and postal service delays can all add time to delivery. In rare cases, a check can take three to four weeks to arrive after being mailed.
What to do if your check has not arrived
If your code 310 check does not arrive within the timeframe you expected, first verify that the mailing address on your tax return is correct. Check your filed return or your IRS account on IRS.gov to confirm the address the IRS has on file. If the address is wrong, the check may have been returned to the IRS, and you will need to contact them to have a new check issued to the correct address.
If the address is correct but the check still has not arrived after four weeks, contact the IRS at 1-800-829-1040. Have your Social Security number, filing status, and the exact refund amount ready. The IRS can verify whether the check was mailed and, if it was, issue a replacement check. Replacement checks are mailed the same way as the original, so expect another 7 to 10 business days for delivery. The IRS can also investigate whether the check was cashed by someone other than you, which would indicate theft or fraud.
Changing from code 310 to direct deposit before the check is mailed
If you see code 310 on your refund status but have not yet received the check, you may be able to change the delivery method to direct deposit through IRS.gov. Log into your IRS account, go to the refund status tool, and look for an option to update your banking information. This option is only available for a limited window after the IRS processes your return but before the check is physically printed and mailed.
Once the check has been mailed, you cannot stop it or redirect it. If you miss the window to change the method online, your only option is to wait for the check to arrive, then deposit it yourself. You cannot ask the IRS to cancel a mailed check and send the money by direct deposit instead — the refund process does not work that way.
What happens if your code 310 check is lost or stolen
If your check arrives but is then lost in the mail, damaged, or stolen, you have options. If the check has not been cashed, contact the IRS and request a replacement. The IRS will verify that the original check was issued to you and has not been deposited, then issue a new check to the same address. This process takes another 7 to 10 business days for mailing.
If the check has already been cashed by someone other than you, this is fraud. Report it to the IRS when ready by calling 1-800-829-1040 and to your local police department. The IRS has fraud investigation procedures, though recovery can be difficult. If you believe your identity was compromised, also place a fraud alert with the three major credit bureaus (Equifax, Experian, and TransUnion) and consider a credit freeze.
Code 310 versus other refund delivery methods
| Refund Code | Delivery Method | Typical Timeline | When It Happens |
|---|---|---|---|
| 030 | Direct deposit to bank account | 3 to 5 business days after IRS issues refund | You filed electronically and provided valid banking information |
| 310 | Paper check mailed to address on file | 7 to 10 business days after IRS mails check | You filed on paper or did not provide banking information |
| 021 | Debit card issued by IRS contractor | 7 to 10 business days after IRS issues card | You chose this option when filing or the IRS offered it as an alternative |
Direct deposit (code 030) is the fastest method because the money moves electronically and does not depend on mail delivery. A debit card (code 021) is similar in speed to a check but arrives as a prepaid card rather than a check you must deposit. Code 310 checks are the slowest because they depend on postal service delivery, which adds 7 to 10 days to the timeline even after the IRS has issued the check.
Frequently Asked Questions
Can I cash a code 310 check at any bank?
Yes. An IRS refund check is a U.S. Treasury check and can be cashed or deposited at any bank, credit union, or check-cashing service. You do not need to have an account at a specific bank. Bring the check and a photo ID. Some check-cashing services charge a small fee, while banks and credit unions typically cash Treasury checks for free if you have an account.
What if the address on my return is outdated?
If you moved after filing but before the check was mailed, contact the IRS when ready at 1-800-829-1040 with your new address. The IRS can sometimes intercept the check before it is mailed and reissue it to your current address. If the check has already been mailed to your old address, it may be returned to the IRS as undeliverable, and you will need to request a replacement check sent to your new address.
How do I know if my code 310 check was actually mailed?
Check your IRS account on IRS.gov using the "Where's My Refund?" tool. This tool shows the status of your refund and confirms whether it has been issued. If it shows code 310 and a date, the check has been mailed. If it still shows "processing," the check has not yet been issued. The tool updates once per day, usually overnight.
Can I have the IRS mail my code 310 check to a different address?
Not after the check has been issued. If the check has not yet been mailed, you may be able to update your address through IRS.gov before it goes out. Once it is mailed, you cannot redirect it. If it arrives at the wrong address, you can ask the person at that address to return it to you, or contact the IRS to request a replacement check sent to the correct address.
What if I never received my code 310 check and it has been months?
Contact the IRS at 1-800-829-1040 and report the check as missing. The IRS can verify whether it was mailed and whether it was ever cashed. If it was not cashed, a replacement will be issued. If it was cashed but you did not cash it, report it as fraud to the IRS and to your local police department. If the check was issued more than a year ago, the IRS may treat it as a stale check and require additional verification before issuing a replacement.