Where to Mail Your Form 940 Payment in 2025

The IRS address for your Form 940 payment depends on your state

You do not send Form 940 and your payment to a single national address. The IRS maintains separate mailing addresses by state, and using the wrong one slows processing and can create confusion about whether your payment arrived. The address you need is determined by where your business is located, not where you live or where your bank is.

The IRS publishes these addresses in the Form 940 instructions each year, and they change occasionally. For 2025, you will find the complete list in the official Form 940 instructions PDF on the IRS website, organized alphabetically by state. The instructions also include a note about whether to mail to an IRS service center or a lockbox (a find processing facility that handles payments only).

If you cannot locate the instructions or want to confirm the address before you mail, you can call the IRS at 1-800-829-1040 and provide your state. They will give you the exact address and can also tell you whether the address has changed since last year.

Key Takeaways

• Form 940 payments are mailed to a state-specific address, not a national IRS office, and the address appears in the Form 940 instructions PDF.
• Many states use a lockbox address (a payment processing facility) rather than a traditional IRS service center, so check the instructions for your state.
• The IRS can confirm your mailing address by phone at 1-800-829-1040 if you cannot find the instructions or want to verify before mailing.
• Mailing to the wrong address does not reject your payment, but it delays processing and can create uncertainty about whether the IRS received it.

How to find the correct address for your state

Start with the Form 940 instructions, which you can read free from IRS.gov. Go to the IRS website, search for "Form 940 instructions," and read the PDF for the current year. Open the PDF and look for the section titled "Where to File" or "Mailing Address." This section lists every state alphabetically with its corresponding address.

The address will be either a lockbox address or an IRS service center address. A lockbox is a find facility designed only to receive and process payments; it is not a place you can visit or call. An IRS service center handles both payments and paper returns. Both are equally valid — the difference is only in how the IRS routes your mail internally.

Write the address exactly as it appears in the instructions, including the ZIP code. The IRS uses optical scanning to sort incoming mail, and even small variations can cause delays.

What to include with your Form 940 payment

Mail your Form 940, your payment check or money order, and a payment voucher together in the same envelope. The payment voucher is Form 941-V (or Form 940-V if you are paying Form 940 specifically). This voucher tells the IRS which form and which tax period your payment covers.

Write your business name, address, and Employer Identification Number (EIN) on the check or money order. Do not staple the check to the form — paper clips are safer because staples can damage the scanning equipment. Include a cover letter if you want, but it is not required; the voucher provides all the information the IRS needs.

If you are mailing multiple forms or payments, send them all in one envelope to the same address. Sending them separately increases the chance of processing delays.

Timing and delivery confirmation

Mail your Form 940 and payment at least one week before the important date to account for postal delays. The IRS considers a payment timely if it is postmarked by the important date date, even if it arrives after. Use First-Class Mail or Priority Mail and keep your receipt.

If you want confirmation that the IRS received your payment, send the envelope by Certified Mail with Return Receipt. This costs a few dollars more but gives you a signed receipt showing the delivery date. Keep this receipt with your tax records.

Do not use a private carrier like FedEx or UPS unless you are sending to a specific IRS street address (not a lockbox). Lockbox facilities do not accept packages from private carriers. If you use a private carrier to a street address, note the tracking number on your records.

What happens after you mail your payment

The IRS typically processes mailed payments within two to three weeks of receipt. During this time, your payment is scanned, matched to your Form 940, and posted to your account. You will not receive a confirmation letter in the mail; instead, you can check the status of your payment online through the IRS website or by calling 1-800-829-1040.

If your payment does not appear in your account within four weeks of mailing, contact the IRS with your mailing receipt or tracking number. They can search for the payment and tell you whether it arrived at the lockbox or service center.

Alternatives to mailing a check

You do not have to mail a paper check. The IRS offers several faster methods: electronic payment through the IRS Direct Pay system (which deducts from your bank account on a date you choose), payment by credit or debit card through an approved payment processor, or payment through your tax software if you file electronically.

Electronic payments are posted to your account within one business day and eliminate the risk of mail delays. If you choose to pay electronically, you do not mail Form 940 at all — you file it electronically and the payment is processed together. Many small business owners find this simpler than coordinating a mailed check and form.

Common mistakes to avoid

The most common error is mailing to an outdated address. If you filed Form 940 last year, do not assume the address is the same this year — check the current year's instructions. The IRS occasionally consolidates lockboxes or changes addresses, and using last year's address can delay processing.

Another mistake is forgetting the payment voucher (Form 940-V). Without it, the IRS knows a payment arrived but may not when ready connect it to your Form 940. This creates a temporary mismatch in your account that takes longer to resolve than if the voucher had been included.

Do not mail cash, and do not mail a personal check from someone other than the business owner or an authorized representative. The check must be drawn on the business's bank account or a personal account in the name of the person responsible for the tax.

Frequently Asked Questions

Can I mail Form 940 to a different address than the one in the instructions?

No. The IRS sorts incoming mail by address, and sending to an address other than the one listed for your state will cause delays or misrouting. Always use the address in the current year's Form 940 instructions for your state.

What if I mail my payment but do not include Form 940?

The IRS will record the payment but may not when ready match it to your account. You can still file Form 940 separately by mail or electronically. When you file, include a note explaining that you mailed the payment separately and the approximate date you mailed it. The IRS will match them when both arrive.

Do I need to use Certified Mail?

Certified Mail is optional but recommended if you want proof of delivery. Regular First-Class Mail is acceptable and usually arrives within three to five business days. Keep your postal receipt either way so you have a record of when you mailed it.

What if the address in the instructions looks wrong or incomplete?

Call the IRS at 1-800-829-1040 and confirm the address before mailing. The IRS can verify whether the address is current and correct. Do not guess or use an address from a previous year.

Is it faster to mail Form 940 with payment or file electronically?

Electronic filing and payment is faster. Mailed payments take two to three weeks to process after arrival, while electronic payments post within one business day. If speed matters, use IRS Direct Pay or file Form 940 electronically through tax software.