What a suppressor tax stamp is and why you need one

A suppressor tax stamp is a federal document that permits you to legally own a suppressor (also called a silencer). The suppressor itself is regulated under the National Firearms Act (NFA), a 1934 federal law that treats suppressors the same way it treats machine guns and short-barreled rifles. You cannot legally possess a suppressor without this stamp, even in states where suppressors are otherwise permitted for hunting or sport shooting.

The stamp costs $200 and does not expire. Once approved, it stays valid for that specific suppressor for as long as you own it. The approval process takes time — typically four to nine months, though this varies depending on how the FBI processes your fingerprints and background check. You submit your process to the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF), the federal agency that administers NFA registrations.

Key Takeaways

  • You must submit Form 4 (for buying from a dealer) or Form 1 (for making your own suppressor) to the ATF along with a $200 check or money order.
  • You need two fingerprint cards completed by a law enforcement agency, a photo ID, and a signed statement from your chief law enforcement officer (or a declaration if your state does not require their approval).
  • The ATF will conduct a background check; approval typically takes four to nine months but can take longer depending on processing volume.
  • Once your stamp is approved, the ATF mails you a physical stamp that you must keep with the suppressor or in a safe place — losing it does not void your registration, but you should report the loss.

Gathering documents before you start

Before you contact the ATF, collect the paperwork you will need. You must have two completed fingerprint cards (FBI Form FD-258). These are not something you fill out yourself — you take them to a local police department, sheriff's office, or a private fingerprinting service and have them rolled and printed by someone trained to do it. Many police departments do this for free; some charge a small fee. Call ahead to ask whether they do NFA fingerprints and whether you need an appointment.

You also need a color photocopy of a valid government-issued photo ID (driver's license, passport, or state ID). Prepare a signed statement on plain paper stating your full legal name, address, date of birth, and citizenship status. If your state requires approval from your chief law enforcement officer (usually the local police chief or sheriff) before you can register an NFA item, you will need their signature on your process. If your state does not require this, you can instead submit a signed statement saying you have informed your chief law enforcement officer of your intent to register the suppressor — this is called a "responsible person declaration" and serves the same purpose.

Choosing between Form 4 and Form 1

The form you submit depends on how you are obtaining the suppressor. Form 4 is used when you are buying a suppressor from a licensed dealer. The dealer will walk you through this process and often handles much of the paperwork on your behalf, though you still must provide the fingerprints, photo ID, and chief law enforcement officer signature or declaration.

Form 1 is used if you are manufacturing your own suppressor. This is legal under federal law if you follow the rules: you must register it before you make it (not after), you must be a U.S. citizen or permanent resident, and you must not be prohibited from owning firearms. Form 1 also requires the same fingerprints, photo ID, and chief law enforcement officer approval or declaration as Form 4. Many people use Form 1 to register suppressors they build from kits or parts they purchase separately.

If you are buying from a dealer, ask them which form they use and whether they will submit it for you. Most dealers submit Form 4 on behalf of the buyer, which simplifies the process — you provide the documents and they handle the filing.

Submitting your process to the ATF

You can submit your process by mail or electronically through the ATF's eForm system. The eForm system is faster and more reliable; it allows you to upload your documents, track your process status, and receive updates by email. To use eForm, you must create an account on the ATF website and follow their step-by-step instructions. The system walks you through each required field and tells you which documents to upload.

If you submit by mail, send your completed form, fingerprint cards, photo ID copy, statement, and a check or money order for $200 to the ATF address listed on the form itself. Use certified mail with return receipt so you have proof of delivery. Include a cover letter with your name, address, and phone number so the ATF can contact you if they have questions.

Whether you use eForm or mail, keep a copy of everything you submit. Write down the date you submitted your process. The ATF will send you a receipt or confirmation; save this as well. Do not send the original fingerprint cards — send copies, as the ATF will not return them.

What happens after you submit

Once the ATF receives your process, they conduct a background check through the FBI. This check looks at your criminal history, mental health records, and other factors that would disqualify you from owning firearms. The background check typically takes several weeks. During this time, you can check the status of your process through the eForm system if you submitted electronically, or by calling the ATF NFA Division at 304-616-4500.

If the ATF approves your process, they will mail you a physical tax stamp. This is a small document with a serial number, your name, and details about the suppressor. Keep this stamp in a safe place — you do not need to carry it with you, but you should have it available if law enforcement asks to see it. Some people keep it in a safe or with important documents.

If the ATF denies your process, they will send you a letter explaining why. Common reasons for denial include a disqualifying criminal conviction, a false statement on the process, or an incomplete submission. If you are denied, you can reapply once you have corrected the issue, or you can request a hearing to appeal the decision.

Common mistakes to avoid

The most frequent error is submitting incomplete fingerprint cards. If the fingerprints are smudged, faint, or rolled incorrectly, the FBI cannot process them and your process stalls. When you have your fingerprints taken, ask the person doing it to check the cards before you leave — they should be dark, clear, and cover the entire print area. If they look poor, ask them to redo them.

Another common mistake is getting the chief law enforcement officer signature wrong or skipping it when your state requires it. Some states do require this signature; others do not. Look up your state's rules before you submit. If you are unsure, submit a responsible person declaration instead — this is accepted in all states and serves the same purpose.

Do not send cash. The ATF only accepts checks or money orders. Write the check or money order for exactly $200 and make it payable to the "Bureau of Alcohol, Tobacco, Firearms and Explosives." If you use eForm, you can pay by credit card or electronic transfer.

Finally, do not assume your process is lost if you do not hear back within a few months. The ATF processes thousands of applications and backlogs are common. Use the eForm system or call the NFA Division to check your status before you resubmit.

After your stamp arrives

Once you receive your tax stamp, your suppressor is legally registered to you. The stamp itself does not expire and does not need to be renewed. If you sell the suppressor, the new owner must submit their own Form 4 and get their own stamp — the registration is tied to the person, not the item.

If you move to a different state, you do not need a new stamp. Your registration follows you. However, check your new state's laws about suppressor ownership — some states prohibit them entirely, and moving there with a registered suppressor could put you in violation of state law.

Keep your stamp and the paperwork from your process together. If you ever need to prove you own the suppressor legally, you will have the documentation ready.

Frequently Asked Questions

How long does it actually take to get approved?

Most applications are approved within four to nine months, but processing times vary. The ATF's current average is around six months, though some applications take longer if there are delays in the background check or if your fingerprints need to be resubmitted. You can check your status through eForm or by calling 304-616-4500.

Can I use my suppressor while I am waiting for the stamp?

No. You cannot legally possess or use a suppressor until your stamp is approved and you receive it. Using one before approval is a federal crime. Wait until the ATF mails you the physical stamp before you take possession of the suppressor.

What if I lose my tax stamp after it arrives?

Your registration with the ATF does not disappear if you lose the physical stamp. The suppressor is still registered to you in the federal database. However, you should report the loss to the ATF so they can note it in their records. You can request a replacement stamp, though the process may take additional time.

Do I need a separate stamp for each suppressor I own?

Yes. Each suppressor requires its own $200 stamp and its own process. If you own three suppressors, you will have three separate stamps and three separate registrations with the ATF.

What disqualifies me from getting a stamp?

You cannot register a suppressor if you are prohibited from owning firearms under federal law — this includes felony convictions, certain domestic violence convictions, active restraining orders, or adjudication as mentally ill. You also cannot register if you are not a U.S. citizen or permanent resident. If you have questions about your specific situation, contact the ATF or speak with a lawyer who handles firearms law.