Mail your payment to the address printed on your tax notice or bill

The IRS does not have a single mailing address for all payments. Instead, the correct address depends on what you are paying for and which state you live in. The safest approach is to use the address printed on the notice or bill you received — the IRS includes the right mailing address on every document they send you.

If you have lost the notice, you can find the correct address on the IRS website by searching for your state, or you can call the IRS at 1-800-829-1040 to confirm the address before you mail your payment. Sending a check to the wrong address delays processing and may result in a late-payment penalty even though you mailed it on time.

Key Takeaways

  • Always use the mailing address printed on your tax notice or bill, because the IRS routes payments to different addresses based on your location and the type of tax you owe.
  • If you have lost your notice, call 1-800-829-1040 or check the IRS website for your state's payment address before mailing a check.
  • Include your Social Security number or Employer Identification Number and tax year on the check itself, and use a check or money order only — the IRS does not accept cash by mail.
  • Mail your payment at least one week before the due date to account for postal delays, and keep a copy of the front and back of your check for your records.
  • If you miss the mailing deadline, you can still pay by phone, online, or through an authorized payment processor to avoid additional late fees.

What information to write on your check

Write your Social Security number or Employer Identification Number on the front of the check in the memo line. On the back of the check, write the tax year and the type of tax (for example, "2023 Form 1040" or "2024 Estimated Tax"). This information helps the IRS match your payment to your account.

Do not mail cash. The IRS only accepts checks or money orders by mail. If you send cash, it will not be recorded as a payment, and you will still owe the full amount plus penalties and interest.

Payment addresses vary by state and tax type

The IRS maintains different mailing addresses for individual income tax, business tax, payroll tax, and excise tax payments. Your state also affects which address you use. For example, if you live in California and owe income tax, your mailing address is different from someone in Texas who owes the same type of tax.

The IRS website lists all payment addresses organized by state. You can also find the correct address by looking at any notice the IRS sent you — it will show the address where that specific payment should go. If you are unsure which type of tax you owe, the notice will clarify that as well.

How long to mail your payment before the due date

Mail your payment at least one week before the due date. The U.S. Postal Service does not may provide delivery on a specific date, and the IRS considers a payment late if it arrives after the due date, even if you mailed it on time. Mailing early protects you from late-payment penalties.

If the due date falls on a weekend or federal holiday, the deadline moves to the next business day. Check your notice to confirm the exact due date for your payment.

Keep records of what you mailed

Make a copy of the front and back of your check before you mail it. Write down the date you mailed it, the amount, and the address where you sent it. Keep these records for at least three years in case the IRS questions whether the payment was received.

If you want proof of mailing, use Certified Mail with Return Receipt from the post office. This costs a few dollars but gives you a receipt showing the date and address where the IRS received your payment. This is especially useful if you are mailing a large payment or if you are close to a deadline.

Faster alternatives to mailing a check

If you are close to the due date and worried about mail delays, you can pay online through IRS.gov, by phone at 1-800-829-1040, or through an authorized payment processor. Online and phone payments are processed the same day, so there is no risk of a late-payment penalty.

The IRS also allows you to set up a payment plan if you cannot pay the full amount at once. You can arrange this by phone, online, or by mail. A payment plan does not eliminate penalties and interest, but it stops them from growing as quickly as they would if you did not pay at all.

What happens if the IRS receives your payment late

If your payment arrives after the due date, the IRS will add a late-payment penalty of 0.5 percent of the unpaid tax for each month or part of a month the payment is late. Interest also accrues on the unpaid amount. These charges continue to grow until the balance is paid in full.

If you can show that the delay was caused by the postal service and not by you, you may be able to request that the IRS remove the penalty. You will need to provide proof, such as a Certified Mail receipt showing the date you mailed the payment. Contact the IRS at 1-800-829-1040 to discuss your situation.

Frequently Asked Questions

Can I mail a payment to the IRS office nearest me?

No. You must use the address printed on your notice or the address listed for your state on the IRS website. Mailing to a local IRS office will delay your payment and may result in a late-payment penalty. Always use the address provided by the IRS for your specific tax type and location.

What if I mail my payment but the IRS says they never received it?

If you mailed with Certified Mail, show the IRS your receipt. If you mailed regular mail, you may not have proof. Contact the IRS at 1-800-829-1040 with the date, amount, and address where you mailed it. They can search their records. If they confirm it was lost, ask about removing the late-payment penalty.

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

No cover letter is required. The IRS only needs your Social Security number or Employer Identification Number and tax year written on the check. A cover letter can actually slow processing. Keep your mailing simple: check, envelope, address, stamp.

Can I mail a payment for someone else's tax bill?

Yes, but write the taxpayer's Social Security number or Employer Identification Number on the check, not your own. The IRS will credit the payment to the correct account. Make sure the check is signed by the person whose name appears on it.

What if the address on my notice is outdated or unclear?

Call 1-800-829-1040 and confirm the current mailing address before you send your payment. The IRS updates addresses periodically, and using an old address can delay processing. A five-minute phone call is faster and safer than guessing.