The Federal Excise Tax and New Semi Truck Financing: Why the 12% FET Pushes So Many Owner-Operators Toward Used Kenworth T680s

Ask an experienced owner-operator why so many of their peers finance a well-kept used Kenworth T680 instead of ordering a brand-new one, and the answer almost always circles back to a federal tax most non-trucking businesses have never heard of: the Federal Excise Tax, or FET, on new heavy trucks and tractors. It's a real cost baked into the price of a new truck before financing even enters the picture, and understanding how it works changes how a lot of owner-operators approach semi truck financing decisions altogether.

What the Federal Excise Tax Actually Is

FET is a federal tax, under Internal Revenue Code Section 4051, applied to the first retail sale of new heavy trucks, truck tractors, and trailers. It's one of the oldest and largest federal excise taxes still in effect, and unlike sales tax, which varies by state, FET applies nationwide at the same rate regardless of where the truck is purchased or registered. It's charged once, at the first retail sale, which is exactly why it factors so heavily into the new-vs-used decision: a used T680 that already had FET paid on its original sale doesn't trigger the tax again when it changes hands a second or third time.

The Rate and What It Applies To

The rate is twelve percent of the first retail sale price, and that sale price includes components installed incident to delivery, meaning the chassis and the truck body or equipment added before the sale are generally included in the taxable amount, not just the base chassis price. Trucks are taxed only if gross vehicle weight exceeds 33,000 pounds, and trailers only if gross vehicle weight exceeds 26,000 pounds, but truck tractors like a T680 are generally subject to FET regardless of weight once the applicable gross combination weight threshold is met, which covers essentially every new highway sleeper or day cab tractor sold for over-the-road use.

How FET Gets Collected

The seller, typically the dealer, is generally liable for FET and responsible for collecting and remitting it, filing Form 720 quarterly with the IRS. In practice, that means FET shows up as a line item in the sale price you negotiate with a dealer rather than a separate bill that arrives later, and it's built into the total before any financing conversation happens. A buyer purchasing specifically for resale or for a qualifying long-term lease can sometimes provide a certification that shifts liability, which is relevant mainly to dealers and leasing companies rather than an owner-operator buying a truck to drive themselves.

Why FET Pushes So Many Owner-Operators Toward Used Trucks

Because FET applies only to the first retail sale, a used T680 effectively carries whatever FET was paid when it was originally sold new, already absorbed into a price history that's now reflected in its current market value rather than charged again as a separate twelve percent tax on today's transaction. That structural fact, combined with the simple reality that a well-maintained used sleeper tractor costs meaningfully less to acquire than a new one in the first place, is a big part of why the used-truck market is as deep and active as it is in trucking specifically, compared to industries where buyers default to new equipment far more often.

Can FET Be Financed Along With the Truck?

Since FET is baked into the negotiated sale price of a new truck rather than billed separately after the fact, it's typically rolled into the total amount financed along with the chassis, body, and any equipment, the same way sales tax or title fees often are. That's a meaningful piece of information to have before you start shopping: the sticker price you're comparing between a new and used T680 already reflects very different starting points once FET is factored into the new truck's total cost, well before term length or deposit size enter the conversation.

Exemptions and Trade-In Credits

A handful of situations change how FET applies, and it's worth knowing they exist even if most owner-operators won't qualify for them:

• Sales to state or local governments, and to qualified nonprofit educational institutions, are generally exempt from FET.

• A truck purchased for further manufacture or legitimate resale can be exempted with the right certification, a path relevant to dealers more than owner-operators.

• Trade-in treatment and how FET interacts with the value of a traded truck can vary, so this is genuinely a detail to confirm directly with your dealer and your tax professional before assuming how it applies to your specific deal.

The Owner-Operator Case: Weighing New vs. Used With FET in Mind

This is exactly the kind of structural detail that belongs alongside the broader comparison covered in our piece on new vs. used semi truck financing: engine hours, mileage, and remaining warranty coverage are only part of the picture. FET is a real, structural reason a used T680 and a new one aren't an apples-to-apples price comparison, on top of whatever the mechanical condition difference is worth. Neither choice is automatically right; a new truck's warranty coverage and uptime reliability are worth something real too. The point is simply that FET belongs in the comparison rather than being a surprise line item discovered mid-negotiation.

Semi Truck Financing: FET Is a Tax, Not a Reason to Avoid Owning

FET is a real cost of buying new, but it isn't a reason to lean on someone else's equipment instead of financing your own. Whether you finance a new T680 with FET built into the price or a used one that already absorbed that tax years ago, you're still building toward ownership of equipment that's actually yours to run, rather than paying indefinitely for a truck you'll never own a piece of. Confirm the exact FET treatment of your specific purchase, including any trade-in considerations, with your dealer and your tax professional before you finalize a deal.

Where BFC Equipment Loans Fits

BFC Equipment Loans works with owner-operators and carriers nationwide, startups and established fleets, strong credit and credit that's taken some hits, to structure semi truck financing for a new or used T680, with a clear-eyed look at what actually belongs in the real total cost comparison, FET included.

Ready to Move Forward?

Talk through semi truck financing for your next Kenworth T680, new or used. Visit our home page to learn more, apply now to get the process started, browse our equipment for sale listings if you're still deciding on the right truck, and subscribe to our newsletter for more financing-strategy breakdowns like this one.