The address depends on where you live and how you're paying

The IRS publishes different mailing addresses for tax payments depending on your state and the type of payment you're sending. You cannot mail a check to the main IRS office in Washington, D.C. — the IRS operates regional lockbox facilities that handle incoming payments, and sending your check to the wrong address delays processing by weeks or months.

The correct address appears on your tax notice or return, but if you're paying without filing a return, or if you've lost the notice, you need to find your state's specific lockbox address before you mail anything. Using the wrong address is one of the most common reasons payments get lost or credited to the wrong account.

Key Takeaways

  • The IRS maintains separate lockbox addresses for each state, and the address you use depends on where you live, not where the IRS is located.
  • Your tax notice, Form 1040, or the IRS website shows the correct address for your state — do not use a general IRS office address.
  • Payments mailed to an incorrect address can take months to locate and explore to your account, even if the IRS eventually finds them.
  • The IRS does not accept payments at field offices or walk-in locations — all mailed payments go to lockbox facilities.

How to find your state's lockbox address

The IRS publishes a complete list of state-by-state mailing addresses on its website under "Where to File" for individual returns. If you received a tax notice from the IRS — such as a bill for taxes owed or a notice of deficiency — the correct mailing address for payment appears on that notice, usually near the bottom or on the back.

If you are filing a return and paying at the same time, the address appears in the instructions for your form or on the return itself. For Form 1040 (the standard individual income tax return), the address is listed in the return's instructions based on your state.

The IRS also maintains this information on IRS.gov under "Mailing Addresses." Search for your state name and "tax payment mailing address" to find the current lockbox location. Addresses do occasionally change, so checking the official source before you mail is worth the five minutes it takes.

What information to include with your payment

Write your Social Security number, tax year, and form type on the check or money order itself — not on a separate piece of paper. The lockbox staff process thousands of payments daily, and a loose note can separate from your payment and get lost.

Include a brief letter with your payment stating your name, address, Social Security number, the tax year you are paying for, and the amount enclosed. This letter is your proof that you mailed the payment, and it helps the IRS match your check to your account if there is any delay.

Do not send cash. The IRS will not process it, and you will have no proof of payment. Use a check, money order, or electronic payment method instead.

Timing and what happens after you mail

Mail a check at least two weeks before any payment important date. The IRS counts a payment as received on the date it arrives at the lockbox, not the date you mail it. If your important date is April 15 and you mail on April 10, your payment may not arrive in time.

After the lockbox receives your payment, it typically takes 5 to 7 business days for the IRS to post it to your account. During this time, you will not see the payment reflected in your IRS account online. If you need proof that you paid, keep your cancelled check or money order receipt.

If you are paying a bill notice, the IRS will send you a receipt by mail within two to three weeks. If you do not receive a receipt within a month, contact the IRS at the phone number on your original notice to confirm the payment was received.

Why electronic payment is faster than mailing

The IRS offers several electronic payment methods that process the same day you submit them: Direct Debit, credit or debit card (through an approved payment processor), and Electronic Federal Tax Payment System (EFTPS). These methods post to your account when ready, and you receive a confirmation number on screen.

Electronic payments also eliminate the risk of your check getting lost in the mail or sent to the wrong lockbox. If you are paying a large amount or have a tight important date, electronic payment removes the guesswork about whether your payment will arrive on time.

You can set up electronic payments on IRS.gov under "Payment Options" or by calling the IRS at 1-800-829-1040. The process takes about 10 minutes and requires your bank account information or credit card number.

What to do if you mailed a payment to the wrong address

If you realize you sent your check to an incorrect address, contact the IRS when ready at the phone number on your tax notice or at 1-800-829-1040. Have your check number, the amount, and the date you mailed it ready. The IRS can sometimes intercept a payment before it reaches the wrong lockbox, but this only works if you call within a few days of mailing.

If the payment has already been processed at the wrong location, the IRS will attempt to locate it and transfer it to your account. This process can take 60 to 90 days. In the meantime, the IRS may send you a bill for the unpaid amount. Once your original payment is found and applied, the IRS will issue a refund for any overpayment.

To avoid this situation entirely, double-check the address on your notice or the IRS website before you seal the envelope. A five-second verification prevents months of back-and-forth.

Frequently Asked Questions

Can I mail my payment to a local IRS office instead of the lockbox address?

No. IRS field offices do not accept mailed payments. All payments must go to the lockbox address for your state. Sending a check to a local office will delay processing by several weeks while the office forwards it to the correct lockbox.

What if I mail a check but the IRS says they never received it?

If your check was lost in the mail, the IRS will not have a record of it. You will need to stop payment on the original check through your bank and mail a new one to the correct lockbox address, or pay electronically. Keep the cancelled check or stop-payment confirmation as proof you attempted to pay.

Do I need to include a cover letter with my payment?

A brief letter with your name, Social Security number, tax year, and the amount is helpful but not required if you write all this information on the check itself. The letter serves as your record that you mailed the payment, so keeping a copy for your files is a good practice.

How long does it take for the IRS to cash my check?

The IRS typically deposits checks within 5 to 7 business days of receiving them at the lockbox. Your bank may clear the check before the IRS deposits it, so do not assume the payment has not been received just because your bank shows the funds as pending.

Can I pay by check if I owe taxes on an amended return?

Yes. Mail your amended return (Form 1040-X) and your check to the same lockbox address for your state. Write "Amended Return" on the check and include the tax year the amendment covers. The lockbox will match your payment to your amended return.