Special Occupational Tax (SOT): Classes, Rates, and Benefits

The Special Occupational Tax is an annual federal tax that every business importing, manufacturing, or dealing in National Firearms Act items must pay to operate legally. It runs from $500 to $1,000 a year depending on what your business does, and it sits on top of your Federal Firearms License rather than replacing it. Starting January 1, 2026, P.L. 119-21 set the making and transfer tax to $0 for most NFA items, but the SOT itself did not change. If you run an NFA business, you still owe it.¹

Who Owes the Tax

Federal law requires every importer, manufacturer, and dealer in NFA firearms to pay the SOT before conducting business.² You also need a valid FFL that authorizes the activity. A standard FFL by itself does not let you deal in NFA items, and an SOT is meaningless without the underlying license.

The tax applies per location. Two shops means two SOTs.² Personal ownership of a suppressor, short-barreled rifle, or other NFA item does not require an SOT; the tax is strictly for commercial activity.

The Three Classes and What They Cost

There are three SOT classes, each tied to a type of NFA business activity and matched to a particular FFL type.

Class 1 (Importer): $1,000 per year. For businesses importing NFA firearms and destructive devices, paired with an importation FFL such as a Type 08 or Type 11.
Class 2 (Manufacturer): $1,000 per year. For businesses manufacturing NFA firearms and destructive devices, typically paired with a Type 07 or Type 10 FFL. Manufacturers can also deal in what they produce.
Class 3 (Dealer): $500 per year. For businesses buying and selling NFA items, paired with a dealer or pawnbroker FFL such as a Type 01, 02, or 09.

These rates have applied since January 1, 1988.³

Reduced Rate for Smaller Importers and Manufacturers

Class 1 and Class 2 taxpayers whose gross receipts were under $500,000 for the most recent taxable year pay $500 instead of $1,000.² The threshold looks at the taxable year ending before the SOT period you’re paying for. Controlled group members are treated as one taxpayer when measuring receipts. Class 3 dealers pay $500 regardless of size.

What the SOT Actually Buys You

The tax is not just a permission slip. It unlocks the mechanics that make NFA commerce workable.

Tax-Free Transfers Between SOT Holders

When one qualified FFL/SOT holder transfers an NFA firearm to another qualified FFL/SOT holder for business purposes, no transfer tax applies.⁴ These transfers move on ATF Form 3 rather than the standard Form 4, and they clear much faster.⁵ Without this, every wholesale transaction in the NFA supply chain would carry a tax and months of waiting.

Post-1986 Machine Guns for Class 2 Manufacturers

Civilian possession of machine guns made after May 19, 1986, is generally prohibited. Class 2 SOT manufacturers can still make new machine guns for sale to government and law enforcement agencies, and ATF also permits FFL/SOT holders going out of business to transfer post-1986 machine guns to other FFL/SOT manufacturers or importers.⁶ If you want law enforcement contracts for automatic weapons, Class 2 is the only path.

How to Register and Pay

Get your FFL first. You cannot register for an SOT without one, and the license type has to match the NFA activity you plan to conduct.

Registration uses ATF Form 5630.7, “Special Tax Registration and Return.” It asks for your FFL number, business name and address, and the class you’re applying for.⁷ You can file and pay through Pay.gov.⁸ First-time registrants also submit a photograph and fingerprints with the initial application.⁹

Tax Year and Timing

The SOT tax year runs from July 1 through June 30, and payment is due on or before July 1.⁷ The statute sets the rate for “a year or fraction thereof,” so starting partway through the year does not reduce your bill.² A February start still costs the full annual amount.

If Your SOT Lapses

Once your SOT expires, you lose the legal authority to conduct NFA business. You cannot buy, sell, manufacture, or import NFA items commercially, and any attempted transfer without a valid SOT is a federal violation. A conviction under the NFA can bring a fine of up to $10,000, imprisonment for up to ten years, or both.¹⁰

Items already in your inventory stay registered to the business, but you lose the ability to move them on a tax-exempt Form 3. Any disposition after that runs through the standard, slower process, with the applicable making or transfer tax attaching for machine guns and destructive devices. Businesses winding down save real time and legal exposure by planning inventory transfers before the SOT lapses.

The SOT Is Not the NFA Tax Stamp

These two taxes get confused constantly. The SOT is an annual business tax that authorizes commercial NFA activity. The NFA tax stamp, technically the making or transfer tax under 26 USC §5811, was historically a one-time $200 tax paid per item when it was made or transferred to a new owner.

P.L. 119-21 set that making and transfer tax to $0 for all NFA firearms except machine guns and destructive devices, effective January 1, 2026.¹ The law did not repeal the NFA. Registration, background checks, ATF approval before transfers, and the SOT itself all remain. An individual buyer no longer pays $200 for a suppressor or short-barreled rifle, but the business selling it still owes $500 or $1,000 a year to keep its SOT active.²

1
Congressional Research Service. The National Firearms Act and P.L. 119-21: Issues for Congress
2
Office of the Law Revision Counsel. 26 USC 5801 – Imposition of Tax
3
eCFR. 27 CFR 479.32 – Special (Occupational) Tax Rates
4
GovInfo. 26 USC 5852 – General Provisions Relating to Transferees and Makers
5
Bureau of Alcohol, Tobacco, Firearms and Explosives. ATF National Firearms Act Handbook
6
Bureau of Alcohol, Tobacco, Firearms and Explosives. May a Manufacturer Licensed Under the GCA Manufacture a Machine Gun for Transfer to a Government Agency
7
Bureau of Alcohol, Tobacco, Firearms and Explosives. Instructions for Form 5630.7, Special Tax Registration and Return Firearms
8
Pay.gov. ATF Special Occupational Tax (SOT) ATF Form 5630.7
9
Office of the Law Revision Counsel. 26 USC 5802 – Registration of Importers, Manufacturers, and Dealers
10
Office of the Law Revision Counsel. 26 USC 5871 – Penalties