File your Form 941 and payment to the IRS, either electronically through EFTPS or by mail to a lockbox address that depends on your state
The IRS does not accept Form 941 and payment at the same address everywhere. Where you send them depends on whether you pay electronically or by check, and which state your business is located in. The fastest and most reliable route is electronic filing through EFTPS (Electronic Federal Tax Payment System), which processes both the form and payment in one submission. If you mail instead, your payment goes to a lockbox address specific to your state, while the form itself goes to a different IRS processing center.
The distinction matters because mailed payments and forms can arrive on different schedules. A check that reaches the lockbox late will be treated as late even if your form arrived on time. Electronic filing eliminates this timing gap and gives you a same-day confirmation number.
Key Takeaways
- EFTPS is the IRS's official electronic payment system and is free to use; you can file Form 941 and pay in one transaction through the IRS website or by phone.
- If you mail Form 941 and a check, the payment goes to a state-specific lockbox address, while the form goes to an IRS service center address — these are different locations.
- Payment lockbox addresses vary by state and are listed on the IRS website; using the wrong address delays processing and can trigger a late-payment notice.
- Form 941 mailed forms go to the IRS service center for your region, not to the lockbox; sending both to the lockbox will cause the form to be misrouted.
- The IRS considers a payment late based on the lockbox receipt date, not the postmark date, so mailing leaves no buffer for postal delays.
Electronic filing through EFTPS
EFTPS is the IRS's official system for paying federal taxes electronically. You can file Form 941 and submit payment on the same day through the IRS website at irs.gov or by calling the EFTPS phone line. The system is free and available 24 hours a day, seven days a week, except for brief maintenance windows.
To use EFTPS, you need an EIN (Employer Identification Number) and a PIN or credentials set up in advance. If you have not used EFTPS before, you can enroll online at eftps.gov in about 10 minutes. The IRS will mail you a PIN within two weeks, or you can set up online credentials when ready and use those instead. Once enrolled, you can schedule payments up to 120 days in advance, which is useful if you want to may support a payment posts before a important date.
When you file Form 941 electronically through the IRS website, you can attach your payment in the same submission. The IRS will send you a confirmation number when ready, and the payment will post to your account within one business day. This method eliminates the risk of a mailed check arriving late or being lost.
Mailing Form 941 and payment separately
If you mail Form 941 and a check, they go to two different addresses. Your check and payment coupon go to a lockbox address specific to your state. Your Form 941 itself goes to an IRS service center address for your region. Sending both documents to the same address will cause the form to be misrouted and delay processing.
The lockbox address depends on your state. For example, if your business is in California, you mail the check to a lockbox in Fresno. If you are in New York, it goes to a lockbox in New York City. The IRS publishes the complete list of lockbox addresses on its website under "Where to File" for Form 941. You can also find the correct address on the Form 941 instructions, which are updated annually.
The Form 941 itself goes to the IRS service center for your region, which is separate from the lockbox. The service center address is also listed in the Form 941 instructions. Using the wrong service center address will not cause the form to be rejected, but it will delay processing by several weeks because the form will have to be forwarded internally.
Payment lockbox addresses by state
The lockbox address for your payment depends on which state your business is located in. The IRS maintains separate lockboxes in different regions to process payments more quickly. These addresses are listed in the Form 941 instructions and on the IRS website, and they do not change frequently, but you should verify the correct address before mailing to may support your payment reaches the right location.
| State | Lockbox Address |
|---|---|
| Alabama, Georgia, South Carolina | IRS, P.O. Box 931000, Louisville, KY 40293-1000 |
| Alaska, Arizona, California, Hawaii, Idaho, Nevada, Oregon, Washington | IRS, P.O. Box 7515, San Francisco, CA 94120-7515 |
| Arkansas, Louisiana, Mississippi, Oklahoma, Texas | IRS, P.O. Box 660619, Dallas, TX 75266-0619 |
| Colorado, Kansas, Nebraska, New Mexico, Utah, Wyoming | IRS, P.O. Box 802501, Cincinnati, OH 45280-2501 |
| Connecticut, Delaware, Maine, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont | IRS, P.O. Box 371621, Pittsburgh, PA 15250-7621 |
| Florida, North Carolina, Virginia, West Virginia | IRS, P.O. Box 931000, Louisville, KY 40293-1000 |
| Illinois, Indiana, Iowa, Michigan, Minnesota, Missouri, Ohio, Wisconsin | IRS, P.O. Box 802501, Cincinnati, OH 45280-2501 |
| Kentucky, Tennessee | IRS, P.O. Box 931000, Louisville, KY 40293-1000 |
| Maryland, Virginia, Washington D.C. | IRS, P.O. Box 371621, Pittsburgh, PA 15250-7621 |
| Montana, North Dakota, South Dakota | IRS, P.O. Box 802501, Cincinnati, OH 45280-2501 |
These addresses change occasionally, so verify the correct lockbox for your state on the IRS website before mailing. The Form 941 instructions, updated each quarter, include the current lockbox addresses. If you mail to an outdated address, the payment may be delayed or returned.
Form 941 service center addresses by region
Form 941 itself goes to one of four IRS service centers, depending on your region. The service center addresses are listed in the Form 941 instructions and on the IRS website. Unlike the lockbox addresses, which are specific to states, the service center addresses are regional and do not change as frequently.
If you are unsure which service center serves your region, check the Form 941 instructions for the current quarter. The instructions include a map and a list of states assigned to each service center. Mailing to the wrong service center will not cause the form to be rejected, but it will add processing time because the form will be forwarded internally.
Timing and postmark rules
The IRS considers a payment on time if it is received by the lockbox by the due date, not if it is postmarked by the due date. This is a critical distinction. A check postmarked on the due date but received three days later will be treated as late, and you will owe a late-payment penalty and interest.
To meet a important date by mail, you should send your payment at least five to seven business days before the due date to account for postal delays. If you are mailing close to the important date, use certified mail with return receipt so you have proof of when the IRS received it. Even with certified mail, the IRS's receipt date — not your postmark date — determines whether the payment is on time.
Form 941 itself is considered filed on the date the IRS receives it, not the postmark date. However, the IRS typically allows a grace period of a few days for mailed forms. If your form arrives a few days late but your payment arrived on time, the IRS will usually not penalize you for the form. If both arrive late, you will owe penalties on both.
When to use EFTPS versus mailing
EFTPS is the safer choice for most businesses because it eliminates postal delays and gives you when ready confirmation. If you are filing close to a important date, EFTPS is the only reliable option. The system is free, available 24 hours a day, and you can schedule payments in advance.
Mailing is an option if you are filing well before the important date and have time to account for postal delays. However, mailing introduces risk: a lost check, a delayed arrival, or a misrouted form can all trigger penalties. If you do mail, use the correct lockbox address for your state and the correct service center address for your region, and send both at least five to seven business days before the important date.
Many payroll processors and accounting software can file Form 941 and submit payment electronically on your behalf. If you use a payroll service, ask whether they handle Form 941 filing and payment. This removes the burden from you and ensures the filing is done correctly and on time.
Frequently Asked Questions
What happens if I mail my check to the wrong lockbox address?
The check may be delayed or returned to you. If it is returned, you will have missed the important date and will owe a late-payment penalty and interest. Always verify the lockbox address for your state on the IRS website or in the Form 941 instructions before mailing.
Can I file Form 941 and pay at the same address?
No. If you mail, the payment goes to the lockbox and the form goes to the service center. Sending both to the same address will cause the form to be misrouted. EFTPS is the only method that allows you to file and pay in one submission to one location.
Is EFTPS really free?
Yes. EFTPS is the IRS's official electronic payment system and has no fees. Some third-party payment processors charge fees, but the IRS's own EFTPS system is free. You can enroll at eftps.gov and start using it when ready.
What if my Form 941 and check arrive on different dates?
The IRS will process them separately. Your payment is considered on time or late based on when the lockbox receives it. Your form is considered filed based on when the service center receives it. If the payment arrives on time and the form arrives a few days late, the IRS usually will not penalize you for the form, but if both arrive late, you will owe penalties on both.
Can I schedule an EFTPS payment in advance?
Yes. EFTPS allows you to schedule payments up to 120 days in advance. This is useful if you want to may support a payment posts before a important date without having to remember to file on the due date. You can schedule a payment and then forget about it until the IRS confirms it has posted.