Make the check payable to U.S. Treasury. Not “IRS,” not “Internal Revenue Service,” not any abbreviation. That is the exact payee name the IRS instructs taxpayers to use on every check, money order, or cashier’s check sent for federal taxes.1Internal Revenue Service. Pay by Check or Money Order The payee line is the easy part. The rest of what belongs on the check, and around it, is where payments get delayed or lost.
What Else Belongs on the Check
Below the payee, the IRS wants enough identifying detail to match the payment to your account without a human having to hunt for it. On the memo line and in the space around it, include:1Internal Revenue Service. Pay by Check or Money Order
- Your name and address, exactly as they appear on your tax return.
- A daytime phone number where you can be reached if there’s a question.
- The tax year the payment applies to, such as “2025.”
- The related form number, like “1040” for an annual return or “1040-ES” for estimated payments.
- The Social Security number, ITIN, or EIN of the person who should receive credit for the payment.
Write the amount in numbers ($1,250.00 rather than spelled out). Do not staple or paperclip the check to your return or voucher.1Internal Revenue Service. Pay by Check or Money Order
One narrow situation: if you filed a joint return but you and your spouse received separate balance-due notices, put the identification number of the person who should get credit on the check and write “MFT 31 separate assessment” on the memo line.1Internal Revenue Service. Pay by Check or Money Order
Include Form 1040-V With an Annual Return Payment
When you mail a check with your annual return, attach Form 1040-V, the one-page payment voucher.2Internal Revenue Service. About Form 1040-V, Payment Voucher for Individuals It has a scannable line that lets the processing center credit your account by machine instead of by hand. Skipping the voucher won’t get the payment rejected, but it will slow things down.
The form takes about two minutes. Enter your name, address, Social Security number, and the exact payment amount. Download the current version from irs.gov rather than reusing an older one, because the scan-line formatting can change. Make sure the name and identification number on the voucher match what you wrote on the check. Mismatches are one of the most common causes of processing delays.
For quarterly estimated taxes, use the voucher from Form 1040-ES that corresponds to that specific quarter, and reference “Form 1040-ES” along with the tax year and your identification number on the check itself.1Internal Revenue Service. Pay by Check or Money Order
Where to Mail the Check
The correct address for a Form 1040-V payment depends on the state you live in.3Internal Revenue Service. Where to File Addresses for Taxpayers and Tax Professionals Filing Form 1040-V
- Most states: Internal Revenue Service, P.O. Box 931000, Louisville, KY 40293-1000
- Alabama, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Texas: Internal Revenue Service, P.O. Box 1214, Charlotte, NC 28201-1214
- Foreign addresses, APO/FPO, or filers using Form 2555: Internal Revenue Service, P.O. Box 1303, Charlotte, NC 28201-1303, USA
These addresses are for Form 1040-V payments only. Estimated tax payments, balance-due notices, and other payment types can go to different addresses, so check the instructions on the specific form or notice you’re responding to. A check sent to the wrong address can lose weeks in transit.
Proving You Paid on Time
Dropping the envelope in a mailbox works, but leaves you with nothing if the IRS later says the payment arrived late. USPS certified mail gives you a postmarked receipt that the IRS accepts as proof of the mailing date.4Internal Revenue Service. 26 CFR Part 301 TD 8932 – Timely Mailing Treated as Timely Filing/Electronic Postmark That receipt shuts down any dispute about when you sent it.
Certain private delivery services from DHL Express, FedEx, and UPS also qualify under the same “timely mailing as timely filing” rule.5Internal Revenue Service. Private Delivery Services (PDS) Not every service tier counts. FedEx Priority Overnight is on the approved list; FedEx Ground is not. Using a service that isn’t approved means the delivery receipt won’t serve as legal proof of the mailing date. The IRS publishes the full list of qualifying services.
For a mailed check to be treated as on time for the 2025 tax year, it needs to be postmarked by April 15, 2026, not received by that date.6Internal Revenue Service. IRS Opens 2026 Filing Season Filing an extension on Form 4868 gives you until October 15 to submit the return, but does not extend the deadline to pay. Tax owed is still due by the April deadline.7Internal Revenue Service. 8Internal Revenue Service. Failure to Pay Penalty Interest also accrues on unpaid balances at a rate that adjusts quarterly, compounding daily on both the tax and the penalty.9Internal Revenue Service. Quarterly Interest Rates
A check that doesn’t clear brings a separate dishonored-payment penalty. For checks under $1,250, the penalty is the lesser of the check amount or $25. For checks of $1,250 or more, it’s 2% of the payment.10Internal Revenue Service. Dishonored Check or Other Form of Payment Penalty The underlying tax also remains unpaid, so the failure-to-pay penalty and interest keep running on top of the dishonored-payment charge.
Confirming the Payment Was Received
After mailing, you can verify the payment through your IRS Online Account at irs.gov under the Payment Activity tab. A paper check can take up to three weeks to appear.11Internal Revenue Service. Online Account for Individuals – Frequently Asked Questions If it hasn’t shown up after three weeks, call the IRS. Having the certified mail receipt or private delivery tracking number ready will make that call shorter.