Send Form 941 to the IRS address that matches your state, and mail the payment separately to a different lockbox address

Form 941 and the payment it covers go to two different places. The form itself goes to an IRS processing center based on your state. The check or money order goes to a lockbox — a bank facility the IRS uses to collect payments — also based on your state. If you send both to the same address, the payment will be delayed and the form may not match your payment record.

The IRS publishes the correct addresses in the Form 941 instructions each quarter. Those addresses change occasionally, so do not use an address from last year's filing. The current addresses are also listed on the IRS website under "Where to File" for Form 941.

If you file Form 941 electronically through EFILED or a tax software provider, you do not mail the form. You still mail the payment separately to the lockbox address for your state, unless you pay electronically through the Electronic Federal Tax Payment System (EFTPS) or your tax software.

Key Takeaways

  • Form 941 and your payment go to two separate addresses — the form to an IRS processing center and the payment to a lockbox facility.
  • The correct addresses depend on your state and change quarterly, so check the current Form 941 instructions or the IRS website before mailing.
  • If you file Form 941 electronically, you still mail the payment separately unless you pay through EFTPS or your tax software.
  • Include your EIN and Form 941 tax period on the check or money order so the payment reaches your account record.
  • Mailing the payment to the wrong address delays processing and can cause your payment to be misapplied to another account.

How to find your state's Form 941 mailing address

The IRS publishes two addresses for each state: one for the form and one for the payment. Both appear in the instructions that come with Form 941. You can also find them on the IRS website by searching "Form 941 where to file" or by visiting the IRS's address lookup tool.

The form address is usually an IRS processing center in a major city. For example, if you are in California, the form goes to Fresno; if you are in New York, it goes to Andover, Massachusetts. The lockbox address is typically a bank facility in a different city, often in a state with major banking infrastructure.

Do not guess or use an address from memory. The IRS changes these addresses without notice, and using an outdated address causes delays. Print the current instructions or screenshot the address from the IRS website before you prepare your envelope.

What to write on your check or money order

Write the check or money order to "United States Treasury." On the memo line, write your Employer Identification Number (EIN), the form number (941), and the tax period the payment covers. For example: "EIN 12-3456789, Form 941, Q1 2024."

Do not write the business name on the check. The IRS matches payments to accounts by EIN, not by name. If the name does not match your EIN record exactly, the payment may be applied to the wrong account or held in suspense.

Include a copy of the payment voucher (Form 941-V) with your check. This one-page form shows the IRS which form and tax period your payment covers. You can print Form 941-V from the IRS website or generate it through your tax software.

Mailing Form 941 and payment together safely

Use two separate envelopes — one for the form and one for the payment. Put the form in an envelope addressed to the form processing center. Put the check and Form 941-V in a separate envelope addressed to the lockbox. This prevents the payment from being opened and processed at the wrong facility.

Mail both envelopes on the same day so they arrive around the same time. The IRS matches them by EIN and tax period, so as long as both arrive within a few days of each other, they will be linked to your account.

Keep a copy of everything you mail: the completed Form 941, the check or money order (front and back), and Form 941-V. If there is ever a question about whether the payment arrived, you will have proof of what you sent and when.

Electronic filing and payment options

If you file Form 941 electronically, you do not mail the form. You submit it through EFILED, a tax software provider, or a payroll service. The form goes directly to the IRS's electronic system.

You can still mail the payment to the lockbox, or you can pay electronically through EFTPS or your tax software. Electronic payment is faster and more reliable — the IRS receives it when ready and matches it to your account automatically. If you pay electronically, do not mail a check.

If you file the form electronically but mail the payment, include Form 941-V with your check so the IRS knows which form the payment covers. Without it, the payment may be held in suspense for several days while the IRS matches it to your account.

What happens if you mail to the wrong address

If you mail Form 941 to the lockbox address or the payment to the form processing center, the mail will be returned or forwarded. This adds one to two weeks to processing time. The IRS will eventually sort it out, but your payment record will show a late arrival.

If the payment reaches the wrong lockbox (for a different state or region), it may be applied to another account or held in suspense. The IRS will eventually correct it when they match the EIN on your check to your account, but this can take several weeks and may trigger a notice.

To avoid this, double-check the address on your envelope against the current Form 941 instructions before you seal it. Spending 30 seconds to verify saves weeks of confusion later.

Timing and delivery confirmation

Mail Form 941 and the payment at least one week before the due date. The IRS considers a payment on time if it is postmarked by the due date, but processing takes time. Mailing early gives you a buffer if there are delays.

Use First-Class Mail or Priority Mail with tracking. Do not use regular mail without tracking — you will have no proof of delivery if the envelope is lost. The cost of tracking is worth the protection.

If you are mailing close to the due date, consider paying electronically instead. EFTPS and most tax software allow you to schedule a payment for a specific date, and the IRS receives it when ready. This eliminates mailing delays and gives you certainty that the payment will arrive on time.

Frequently Asked Questions

Can I mail Form 941 and the payment to the same address?

No. The form and payment go to two different addresses. Mailing both to the same place causes the payment to be delayed and may prevent it from matching your form. Always use two separate envelopes and two separate addresses.

What if I do not have Form 941-V?

Form 941-V is a one-page voucher that tells the IRS which form your payment covers. You can print it from the IRS website or generate it through your tax software. If you do not include it, the IRS will still process your payment, but it may take longer to match it to your account.

Do I need to mail Form 941 if I file electronically?

No. If you file Form 941 electronically through EFILED, tax software, or a payroll service, the form goes directly to the IRS. You only mail the payment, unless you pay electronically through EFTPS or your software.

What if my state's address changed since last year?

The IRS changes mailing addresses occasionally without notice. Always check the current Form 941 instructions or the IRS website before mailing. Do not use an address from a previous year's filing.

Is it better to mail or pay electronically?

Electronic payment is faster and more reliable. The IRS receives it when ready and matches it to your account automatically. If you mail a check, it takes several days to arrive and process. If you have the option, pay through EFTPS or your tax software.