A Special Occupational Taxpayer dealer, usually shortened to SOT dealer, is a federal firearms licensee who pays an annual federal tax to the Bureau of Alcohol, Tobacco, Firearms and Explosives for the right to deal commercially in items regulated under the National Firearms Act (NFA), such as suppressors, short-barreled rifles, and machine guns.1Congress.gov. The National Firearms Act and PL 119-21 – Issues for Congress SOT is not a standalone license. It is a tax status that sits on top of an existing Federal Firearms License (FFL), and it has to be renewed every year.
What SOT Status Actually Is
Treat SOT as an annual tax stamp that unlocks NFA activity for someone who already holds an FFL. Without it, an FFL holder can deal in ordinary firearms but cannot buy, sell, or manufacture NFA-regulated items for business purposes. The SOT tax year runs from July 1 through June 30, with payment due on or before July 1.2Office of the Law Revision Counsel. 26 USC 5802 – Registration of Importers, Manufacturers, and Dealers ATF issues a Special Tax Stamp (ATF Form 5630.6A) as proof of payment, and a separate stamp is issued for each business location.3Bureau of Alcohol, Tobacco, Firearms and Explosives. Instructions for Form 5630.7, Special Tax Registration and Return Firearms
People often call any SOT a “Class 3 dealer.” Class 3 is actually just one of three SOT classifications, and it specifically covers dealers. Importers and manufacturers fall under different classes with different tax amounts.
The Three SOT Classes
Each class corresponds to a specific NFA activity and requires a particular type of FFL underneath it.
Class 1 (Importer). For importing NFA firearms. Requires a Type 08 FFL (importer of firearms other than destructive devices) or Type 11 FFL (importer of destructive devices). Class 1 importers often work with government or law enforcement buyers.4Bureau of Alcohol, Tobacco, Firearms and Explosives. Federal Firearms Licenses
Class 2 (Manufacturer). For manufacturing NFA items. Requires a Type 07 FFL (manufacturer of firearms other than destructive devices) or Type 10 FFL (manufacturer of destructive devices). A Class 2 holder can both manufacture and deal in NFA items, which makes it the most flexible classification.4Bureau of Alcohol, Tobacco, Firearms and Explosives. Federal Firearms Licenses
Class 3 (Dealer). For dealing in NFA firearms at the retail level. Requires a Type 01 FFL (dealer in firearms), Type 02 FFL (pawnbroker in firearms), or Type 09 FFL (dealer in destructive devices). This is the most common SOT class, held by retail shops that sell suppressors, short-barreled rifles, and similar items to qualified buyers.4Bureau of Alcohol, Tobacco, Firearms and Explosives. Federal Firearms Licenses
Annual tax rates: Class 3 is $500 per year. Class 1 and Class 2 are $1,000 per year, reduced to $500 if the business’s total gross receipts for the most recent taxable year were under $500,000.5eCFR. 27 CFR Part 479 Subpart D – Special (Occupational) Taxes If your company belongs to a controlled group under the Internal Revenue Code, the reduced rate applies only if the entire group’s combined gross receipts fall below $500,000.3Bureau of Alcohol, Tobacco, Firearms and Explosives. Instructions for Form 5630.7, Special Tax Registration and Return Firearms
What NFA Items an SOT Unlocks
The National Firearms Act defines, in 26 U.S.C. 5845, the categories of weapons that require NFA registration and that an SOT lets you deal in commercially: machine guns, silencers (suppressors), short-barreled rifles with barrels under 16 inches, short-barreled shotguns with barrels under 18 inches, destructive devices, and “any other weapons,” a catch-all covering concealable firearms such as pen guns and smooth-bore pistols.6Office of the Law Revision Counsel. 26 USC 5845 – Definitions Antique firearms and items the ATF classifies as collector’s pieces unlikely to be used as weapons are excluded.
State law is a separate layer. Roughly eight states prohibit civilian suppressor possession entirely, and several others restrict machine guns or short-barreled firearms. Before stocking a particular NFA item, confirm that state and local law allows civilian sales where you operate.
How to Become an SOT Dealer
Get the Right FFL First
You cannot apply for SOT status without a current FFL, and the FFL type has to match the SOT class you want. A prospective Class 3 dealer needs at least a Type 01 FFL, which costs $200 to apply for and $90 to renew every three years.4Bureau of Alcohol, Tobacco, Firearms and Explosives. Federal Firearms Licenses A prospective Class 2 manufacturer needs a Type 07 FFL ($150 application, $150 renewal). FFL applications go through the ATF’s Federal Firearms Licensing Center and involve a background check, interview, and premises inspection.
File Form 5630.7 and Pay the Tax
Once the FFL is in place, you file ATF Form 5630.7 (Special Tax Registration and Return) and pay the annual special occupational tax.3Bureau of Alcohol, Tobacco, Firearms and Explosives. Instructions for Form 5630.7, Special Tax Registration and Return Firearms The form can be submitted and paid through Pay.gov.7Pay.gov. ATF Form 5630.7 – Special Tax Registration and Return National Firearms Act
If you operate from more than one premises, each location requires its own SOT tax payment. You can cover all locations on a single Form 5630.7, but the tax amount multiplies by the number of locations and ATF issues a separate Special Tax Stamp for each. You also have to attach a sheet listing the name, trade name, address, and FFL number for every additional location.3Bureau of Alcohol, Tobacco, Firearms and Explosives. Instructions for Form 5630.7, Special Tax Registration and Return Firearms
The 2026 Transfer Tax Change
Effective January 1, 2026, federal legislation changed the NFA transfer tax structure. Under the amended 26 U.S.C. 5811, the $200 transfer tax now applies only to machine guns and destructive devices. For every other NFA firearm, including suppressors, short-barreled rifles, short-barreled shotguns, and any-other-weapons, the transfer tax is $0.8Office of the Law Revision Counsel. 26 USC 5811 – Transfer Tax
The NFA registration requirement itself did not change. Buyers still complete ATF Form 4, go through the background check, and wait for approval. Only the tax went away for most items. For an SOT dealer, the practical effect is that suppressors and short-barreled rifles are cheaper for customers to acquire, which tends to raise demand, while the paperwork and compliance load stay the same.
Transfers Between and Out of SOT Inventory
NFA transfers use different ATF forms depending on who is on each side of the deal.
ATF Form 3 is used for tax-exempt transfers between two FFL/SOT holders. ATF Form 4 is used when an SOT dealer transfers an NFA item to a non-licensee, individual or trust; the $200 tax still applies for machine guns and destructive devices, and is $0 for other NFA items.8Office of the Law Revision Counsel. 26 USC 5811 – Transfer Tax ATF Form 5 covers tax-exempt transfers to government agencies and distributions to lawful heirs from an estate.9Bureau of Alcohol, Tobacco, Firearms and Explosives. Federal Firearms Regulations Reference Guide – Transfers of NFA Firearms eForms submissions consistently process faster than paper across all three forms.10Bureau of Alcohol, Tobacco, Firearms and Explosives. Current Processing Times
Machine Guns and Dealer Samples
Machine guns are where SOT privileges go furthest, and where mistakes are most costly. Federal law has prohibited civilians from possessing machine guns manufactured after May 19, 1986.11Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts Civilians can only own machine guns that were lawfully registered before that date, and the supply is fixed and shrinking, which is why transferable pre-1986 machine guns routinely sell for tens of thousands of dollars.
SOT holders can possess post-1986 machine guns as “dealer samples,” but the rules differ sharply depending on when the gun was made.
Pre-1986 Samples
These are machine guns manufactured or imported between 1968 and May 19, 1986, that entered the NFA registry during that window but were never transferred to a civilian. An SOT can acquire a pre-1986 sample without a law enforcement demonstration letter, and can keep it even after surrendering SOT status.12Bureau of Alcohol, Tobacco, Firearms and Explosives. Ruling 1986-5 Machine Gun Samples Federal Firearms Licensees That retention right is what makes pre-1986 samples more valuable and less risky to hold.
Post-1986 Samples
Post-1986 dealer samples are machine guns manufactured or imported after May 19, 1986. Acquiring one requires a “law letter,” a written request from a law enforcement agency expressing interest in seeing or purchasing that specific model. The letter has to be on agency letterhead, signed by the agency head or authorized delegate, dated within one year of the transfer application, and identify the particular make and model.13Bureau of Alcohol, Tobacco, Firearms and Explosives. Federal Firearms Regulations Reference Guide – Post-1986 Machinegun Dealer Samples
The critical catch: if your SOT status lapses or you discontinue your FFL, you cannot keep post-1986 dealer samples. They must leave your inventory before your license expires, and the only lawful recipients are other current SOT holders or government agencies.14Bureau of Alcohol, Tobacco, Firearms and Explosives. What Happens to Post-86 Dealer Sample Firearms When FFL SOT Discontinues Business Failing to dispose of them before your SOT expires puts you in illegal possession of a machine gun, which carries penalties of up to $10,000 in fines and 10 years in federal prison.15Office of the Law Revision Counsel. 26 USC 5871 – Penalties
Recordkeeping, Security, and Keeping Status
SOT dealers carry the same recordkeeping obligations as any FFL holder, plus the added NFA registration tracking. Every firearm acquisition and disposition goes in a bound book (the A&D book), every retail sale to a non-licensee gets an ATF Form 4473, and NFA items must appear in the National Firearms Registration and Transfer Record maintained by ATF.
If you use a computerized A&D system rather than a physical bound book, ATF requires a daily backup to disk or tape. If you ever close the business, you must provide an ASCII text file along with printed copies of all records to the ATF’s Out of Business Records Center.16Bureau of Alcohol, Tobacco, Firearms and Explosives. Prescribed Requisites for Computerized A and D Software
Federal law does not mandate a specific vault or safe for NFA inventory, but ATF guidance recommends removing firearms from display cases overnight into a reinforced vault, installing burglar bars or security gates, placing concrete-filled posts outside the building to prevent vehicle-ramming break-ins, and conducting a full physical inventory at least once a year.17Bureau of Alcohol, Tobacco, Firearms and Explosives. Learn About Firearms Safety and Security
NFA violations are federal felonies carrying up to $10,000 in fines and up to 10 years in prison per offense.15Office of the Law Revision Counsel. 26 USC 5871 – Penalties For SOT dealers specifically, the most common path to serious trouble is letting status lapse while still holding post-1986 dealer samples. Inventory that was legal one day becomes illegal possession the next.