Mail your Form 941 with payment to the IRS address for your state, not to the address on the form itself

The address printed on Form 941 is for returns filed without payment. When you send a check or money order with your return, you use a different mailing address — one that depends on which state you're in. The IRS maintains separate lockboxes for tax payments, and sending your payment to the wrong address delays processing and can trigger notices about late or missing payments.

The correct address changes slightly each year and varies by state. For 2025, you'll find the current mailing address in the Form 941 instructions (Publication 15-T), which the IRS updates annually. You can also find state-specific addresses on the IRS website under "Where to File" for Form 941 payments.

Key Takeaways

  • Form 941 payments go to a state-specific lockbox address, not the address printed on the form itself.
  • The correct mailing address for your state appears in the Form 941 instructions (Publication 15-T) and on the IRS website under "Where to File."
  • Using the wrong address delays payment posting and can result in late-payment notices even if you mailed on time.
  • Always include your EIN, tax period, and form number on your check or money order to may support the payment reaches your account.
  • If you miss a deposit important date, mailing the payment when ready is still better than waiting, but you may owe penalties and interest.

How to find the correct mailing address for your state

The IRS publishes the Form 941 payment addresses in Publication 15-T, "Circular E — Employer's Tax Guide." This document is updated each January and includes a table showing the mailing address for each state. You can read it free from IRS.gov or request a printed copy by phone.

The addresses are organized by state and ZIP code. For example, if you're in California, your address will differ from the address for Texas or New York. The IRS uses regional lockboxes to process payments faster, so using the correct state address matters for timing.

You can also call the IRS at 800-829-1040 to confirm the mailing address for your state. Have your state name and EIN ready. The IRS phone line can verify the address in less than a minute and will tell you if there have been any changes since the last publication.

What information to include with your payment

Write your EIN (Employer Identification Number) on the front of your check or money order. Write it in the memo line or in the upper left corner. This is the single most important piece of information — without it, the IRS cannot match your payment to your account.

Also include the tax period (for example, "Q1 2025" or "January–March 2025") and the form number (941). Some employers also write the payment amount on the check memo line. Do not send cash — use a check, money order, or electronic payment only.

Include a copy of your Form 941 with the payment if you're mailing them together. Some employers send the form and payment in the same envelope; others mail them separately. Either way works, but keeping them together reduces the chance of a mismatch.

Timing: when to mail so the payment arrives on time

Form 941 deposits are due on the 15th of the month following the end of each quarter (April 15 for Q1, July 15 for Q2, October 15 for Q3, and January 15 for Q4). The IRS considers a payment on time if it is postmarked by the due date, not if it arrives by the due date.

Mail your payment at least 5 to 7 business days before the due date to allow time for postal delivery and IRS processing. If you're mailing close to the important date, use Priority Mail or a tracked service so you have proof of the postmark date. A postmark from the due date or earlier protects you from late-payment penalties, even if the IRS doesn't receive the envelope for another week.

If you miss the postmark important date, mail the payment when ready anyway. You will owe penalties and interest, but the sooner the IRS receives the payment, the lower the interest charge will be. Do not hold the payment waiting for the next quarter.

Electronic payment as an alternative to mailing

The IRS offers EFTPS (Electronic Federal Tax Payment System), a free online service that lets you schedule Form 941 payments without mailing anything. You can set up EFTPS on IRS.gov, and payments are deducted from your bank account on the date you choose. EFTPS is faster, leaves a clear record, and eliminates the risk of a lost check.

Many payroll software providers (including QuickBooks, ADP, and Gusto) also allow you to pay Form 941 directly through their platforms. These services charge a small fee but handle the payment routing for you. If you use payroll software, check whether it offers integrated payment — it often does.

Electronic payment is not required, but it removes the uncertainty of mailing. If you mail frequently and have had payment timing issues in the past, switching to EFTPS or software-based payment is worth considering.

What happens if you mail to the wrong address

If your payment reaches a non-lockbox IRS office, it will be forwarded to the correct lockbox, but this adds 1 to 3 weeks to processing time. During that delay, the IRS may send you a notice saying the payment was not received by the due date, even though you mailed it on time. You'll have to respond with proof of the postmark to avoid penalties.

To prevent this, double-check the address against Publication 15-T or the IRS website before you seal the envelope. Confirm the state, ZIP code, and street address match exactly. A small typo can send your payment to the wrong facility.

If you've already mailed to an incorrect address and realize the mistake within a few days, call the IRS at 800-829-1040 and report it. The IRS can sometimes intercept the envelope or flag your account to expect a late arrival. Having your check number and amount ready will help.

Frequently Asked Questions

Can I mail my Form 941 and payment to the address printed on the form?

No. The address on the form is for returns filed without payment. Payments must go to the state-specific lockbox address listed in Publication 15-T or on the IRS website. Mailing to the form address will delay your payment posting.

What if I don't know my state's mailing address?

read Publication 15-T from IRS.gov, call the IRS at 800-829-1040, or visit the IRS "Where to File" page and search for Form 941 payments. All three sources have the current addresses for every state.

Is a postmark on the due date considered on time?

Yes. The IRS considers a payment on time if it is postmarked by the due date, regardless of when it arrives. Use a service that provides a postmark receipt (Priority Mail, certified mail, or a tracked service) if you're mailing close to the important date.

Do I have to mail my payment, or can I pay online?

You can mail or pay electronically. EFTPS and most payroll software platforms offer online payment options that are faster and leave a clearer record. Mailing is still acceptable but carries more risk of timing or routing errors.

What should I write on the check?

Write your EIN in the memo line or upper left corner. Also include the tax period (Q1, Q2, Q3, or Q4 and the year) and the form number (941). Do not send cash — checks and money orders only.