How to Get a Tax Stamp for a Suppressor: Forms, Trusts, and Rules

To get a tax stamp for a suppressor, you file an application with the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF), pass a federal background check, submit fingerprints and a photo, notify your local law enforcement, and wait for ATF approval before taking possession. As of 2026, the federal tax on making or transferring an NFA firearm is $0, but the registration and approval steps are still mandatory. The process is the same whether you buy the suppressor from a dealer or build it yourself.

Confirm Your State Allows Suppressors

Federal approval does not override state law. Eight states currently prohibit civilians from owning suppressors, and buying one in a state that bans them is a state felony regardless of what the ATF approves. If you live near a state line, carrying a suppressor into a neighboring state that bans them exposes you to prosecution there too. Check your state’s rules before you spend anything.

Who Can Get a Tax Stamp

You must be at least 21 to buy from a licensed dealer, a U.S. resident, and not fall into any federally prohibited category. Those categories include a felony conviction (any crime punishable by more than a year), a misdemeanor domestic violence conviction, an active protective order involving an intimate partner or their child, a dishonorable discharge, current unlawful drug use or addiction, adjudication as mentally defective or commitment to a mental institution, and fugitive status. The ATF runs a background check on every applicant, and any hit will trigger a denial.¹

Choose How the Suppressor Will Be Registered

Every suppressor is registered to a specific person or entity. Your choice affects who can legally touch it and what happens to it when you die.

Individual

The simplest option. Paperwork covers only you: your fingerprints, photo, and personal information. The catch is that nobody else can possess the suppressor unless you’re physically present and supervising. If your spouse takes it out of the safe while you’re away, that’s technically a federal violation.

NFA Trust

A trust owns the suppressor on behalf of its trustees. Any named trustee can possess and use it independently, which solves the household-access problem, and beneficiaries inherit through the trust without a new transfer application. The trade-off: every “responsible person” on the trust submits their own fingerprints, photo, and questionnaire with each application. Many dealers include a basic trust with purchase; a custom trust from an attorney usually runs a few hundred dollars.

Corporation or LLC

A business entity can register NFA items much like a trust. Officers, partners, or members with authority over the entity’s firearms are treated as responsible persons and each submit fingerprints, a photograph, and a Responsible Person Questionnaire. This route mainly makes sense if you already run an entity and want it to hold the item.

File the Right ATF Form

Which form you file depends on whether you’re buying or building. Either way, you’ll need your personal information, the suppressor’s make, model, and serial number, and identification documents for every responsible person.

Buying From a Dealer: Form 4

Most people go this route. In practice:

Choose and pay for the suppressor. The dealer holds it in inventory. You cannot take it home yet.
Complete Form 4. Your dealer usually starts this in the ATF eForms portal. You enter your personal information; the dealer enters the suppressor details.
Submit fingerprints and a photo. Individual applicants need one set of prints on FBI Form FD-258 cards and a 2×2 inch passport-style photo. Many dealers have kiosks that capture electronic prints on site.
If you’re applying through a trust or entity, each responsible person also files their own fingerprints, photo, and ATF Form 5320.23 (the Responsible Person Questionnaire), along with a copy of the trust agreement or articles of incorporation.²
Notify your local Chief Law Enforcement Officer. A copy of the completed application goes to the CLEO with jurisdiction over your address. This is a notification only. The CLEO cannot approve or deny your application.³

The registration requirement itself comes from federal statute, which prohibits transferring an NFA firearm without filing an application, obtaining ATF approval, and registering the item to the new owner.⁴

Making Your Own: Form 1

If you’re building a suppressor from a kit or raw materials, you file Form 1 instead. One rule matters above the others: you must have ATF approval in hand before you begin any manufacturing. Assembling components before your Form 1 is approved is a federal felony, even if the application is already submitted. The same fingerprint, photo, CLEO notification, and responsible-person rules apply.³

eForms or Paper

The ATF accepts applications through its eForms online portal or by paper mail. eForms is faster at every stage: submission, processing, and delivery of your approved form. You create an account, upload documents, and pay through Pay.gov.⁵

Paper applications require duplicate copies of everything mailed to the ATF’s NFA Division, with a separate copy to your CLEO. Paper processing is slower, and documents can get lost. Unless you have a specific reason to file on paper, use eForms.

Processing Times and Getting Your Stamp

After submission, the ATF runs your background check and reviews the paperwork. Wait times have improved sharply from the months-long backlogs of recent years. As of early 2026, the ATF’s reported averages for Form 4 are:

eForm 4, individual: about 10 days
eForm 4, trust: about 26 days
Paper Form 4, individual: about 21 days
Paper Form 4, trust: about 24 days

These averages shift with application volume, so your wait may run shorter or longer.⁶

When your application is approved, the ATF places a tax stamp on the form and notifies your dealer. eForms filers get an email with the digitally stamped document; paper filers get the physical stamped form mailed back to the dealer. Either way, you cannot take possession until that stamped form exists. The statute is explicit that the transferee shall not take possession until the Secretary has approved the transfer and registration.⁴

If Your Application Is Denied

Denials usually come from a background check flag. The denial letter now includes information on the appeals process, which runs through the FBI’s National Instant Criminal Background Check System (NICS). There you can challenge the accuracy of the record that triggered the denial. A separate program called the Voluntary Appeal File exists for applicants who face repeated delays, but the ATF has been clear that it does not function as an appeal of a denied NFA application.

After Approval: What You Need to Know

Proof of Registration

Federal law requires you to keep proof of registration and produce it when the ATF asks.⁷ You are not required to carry the original with you every time you shoot. Most owners keep the original in a safe and carry a photocopy or a scan on their phone. Many ranges will ask to see proof before letting you shoot suppressed, so keeping a copy accessible is practical.

Constructive Possession

This is where individual registrations cause real trouble. Constructive possession means someone has knowing access to or control over an NFA item without the registered owner supervising. If your suppressor is registered to you individually and lives in a safe your spouse or roommate can open, that person arguably possesses an unregistered NFA firearm, which is a federal felony. The fix is either a trust that names household members as co-trustees, or storage in a locked container that only you can open.

Interstate Travel

Suppressors do not require ATF Form 5320.20 (the interstate transport application) to cross state lines, unlike short-barreled rifles, machine guns, and destructive devices.⁸ You can travel with your suppressor across state lines, provided the destination state permits ownership. Carrying a copy of the approved form is a smart precaution if you encounter law enforcement unfamiliar with NFA rules.

Penalties for Skipping the Process

Possessing a suppressor not registered to you in the National Firearms Registration and Transfer Record is a federal felony under 26 U.S.C. § 5861.⁹ The penalty is a fine of up to $10,000, up to 10 years in prison, or both, and the suppressor is subject to seizure and forfeiture.¹⁰ These apply to someone who never registered and to someone whose paperwork is technically deficient. The ATF does not issue warnings for NFA violations. Each suppressor also requires its own separate registration; five suppressors means five approved forms.

1
Office of the Law Revision Counsel. United States Code Title 18 – Section 922
2
Bureau of Alcohol, Tobacco, Firearms and Explosives. NFA Responsible Person Questionnaire
3
Bureau of Alcohol, Tobacco, Firearms and Explosives. Application to Make and Register a Firearm – ATF Form 1 Instructions
4
Office of the Law Revision Counsel. United States Code Title 26 – Section 5812
5
Bureau of Alcohol, Tobacco, Firearms and Explosives. eForms Applications
6
Bureau of Alcohol, Tobacco, Firearms and Explosives. Current Processing Times
7
Office of the Law Revision Counsel. United States Code Title 26 – Section 5841
8
Bureau of Alcohol, Tobacco, Firearms and Explosives. Application to Transport Interstate or Temporarily Export Certain NFA Firearms – ATF Form 5320.20
9
Office of the Law Revision Counsel. United States Code Title 26 – Section 5861 Prohibited Acts
10
Office of the Law Revision Counsel. United States Code Title 26 – Section 5871