To buy a truck for business, you title and finance it in the company’s name using an EIN, business tax returns, and commercial insurance, then match the truck’s gross vehicle weight rating to the tax treatment and federal registrations you plan to rely on. A truck rated above 6,000 pounds GVWR can qualify for up to $2,560,000 in first-year Section 179 expensing for 2026, and 100% bonus depreciation may let you write off the full purchase price the year you place it in service. Getting there depends on paperwork you assemble before you shop, the ownership structure at closing, and mileage records you keep from day one.
What You Need Before You Shop
Lenders and dealers will ask for the same core documents. The central one is your federal Employer Identification Number, the nine-digit number the IRS issues for tax reporting, banking, and business credit.1Internal Revenue Service. Employer Identification Number Alongside the EIN, expect to produce your Articles of Incorporation or Organization and at least two years of business tax returns so the lender can see the company can carry the debt.
Whoever signs the financing application has to have authority to bind the company, and that authority should already be written into your bylaws or operating agreement. The business address on the application needs to match what’s on file with your Secretary of State. Small mismatches between these records are one of the most common reasons an approval stalls.
Commercial auto insurance quotes belong in this stack too. Commercial policies carry higher liability limits than personal ones, and lenders typically require at least $1,000,000 in combined single-limit coverage. Hauling cargo or towing equipment usually adds specific riders. Getting quotes early keeps insurance from becoming the bottleneck at closing.
Financing: Loan or TRAC Lease
Commercial truck financing usually comes down to two structures, and they affect your balance sheet, tax position, and long-term cost differently.
A commercial installment loan is the familiar version: you borrow, pay it down over 36 to 72 months, and own the truck once the loan is paid off. The lender holds a lien on the title in the meantime. Interest rates depend on your business credit profile, the age of the vehicle, and the lender. Most small businesses will be asked to sign a personal guarantee, and that is where owners often underestimate the risk.
A personal guarantee means that if the business can’t pay, you personally can. An unlimited guarantee lets the lender pursue your personal savings, real estate, and other assets for the full balance. A limited guarantee caps your exposure at a set dollar amount. Forming an LLC does not shield you from a guarantee you signed personally. A default hits both business and personal credit, and business bankruptcy will not eliminate a personal guarantee unless you file personal bankruptcy alongside it. Negotiate for a limited guarantee when you can, and read what you’re signing.
A Terminal Rental Adjustment Clause (TRAC) lease works differently. The leasing company owns the truck through the lease term. At the end, the payment adjusts based on the truck’s actual value against the projected value: if it held up better than expected, you may get a credit; if it depreciated faster, you owe the difference. TRAC leases suit trucks that will accumulate high mileage or that you don’t intend to keep long-term. The trade-off is balance-sheet treatment, which can matter for lending ratios and financial reporting.
Weight Rating Drives the Tax Deduction
Buying through the company rather than personally opens two provisions that do most of the work: Section 179 expensing and bonus depreciation under Section 168(k). Both hinge on the truck’s gross vehicle weight rating.
Section 179 Expensing
Section 179 lets you deduct the full cost of qualifying business equipment in the year you place it in service instead of depreciating it over several years.2Office of the Law Revision Counsel. 26 USC 179 Election to Expense Certain Depreciable Business Assets For 2026, the maximum deduction is approximately $2,560,000, and it begins phasing out once total qualifying equipment purchases exceed roughly $4,090,000. New and used trucks both qualify as long as the vehicle is new to your business.
Section 280F defines a “passenger automobile” as a four-wheeled vehicle rated at 6,000 pounds GVWR or less, and vehicles at or below that weight face strict annual depreciation caps.3Office of the Law Revision Counsel. 26 USC 280F Limitation on Depreciation for Luxury Automobiles For a passenger automobile placed in service in 2026 with bonus depreciation, the first-year cap is $20,300, then $19,800, $11,900, and $7,160 each year after. Without bonus depreciation, the first-year cap drops to $12,300.
A truck rated above 6,000 pounds GVWR escapes the luxury auto caps entirely. That is why the weight sticker matters: a qualifying heavy truck can be fully expensed in year one, while a lighter pickup might take six or more years. The GVWR is usually printed on the manufacturer’s label on the driver’s side door jamb. Sport utility vehicles between 6,000 and 14,000 pounds sit in a middle category: they escape the passenger auto caps but face a separate Section 179 limit of $32,000.2Office of the Law Revision Counsel. 26 USC 179 Election to Expense Certain Depreciable Business Assets
Bonus Depreciation
Section 168(k) adds a first-year depreciation allowance on top of normal depreciation. For qualifying property placed in service after January 19, 2025, that allowance is 100% of the adjusted basis, so the entire purchase price can be written off in year one.4Office of the Law Revision Counsel. 26 USC 168 Accelerated Cost Recovery System It applies to new and used vehicles. For trucks over 6,000 pounds GVWR, Section 179 and bonus depreciation together can produce a full first-year write-off.
The 50% Business-Use Rule
Both Section 179 and bonus depreciation require that business use of the truck exceeds 50%.3Office of the Law Revision Counsel. 26 USC 280F Limitation on Depreciation for Luxury Automobiles If business use drops below that in a later year, the IRS recaptures part of the depreciation you already claimed, which means additional tax. That single rule makes your mileage log the most important document behind the deduction.
Mileage Records the IRS Will Accept
The IRS requires a written record of every business trip made at or near the time of the trip. A log updated weekly counts as timely. Each entry needs the date, the starting and ending odometer readings, miles driven, destination, and business purpose. You also track annual totals split between business and personal miles. The IRS does not accept estimates.5Internal Revenue Service. Publication 463 Travel, Gift, and Car Expenses Without a contemporaneous log in an audit, the entire deduction can be lost. GPS-based apps handle this more reliably than a paper book, but either works if the records are consistent and timely.
The IRS does publish a standard mileage rate (72.5 cents per business mile in 2026) as an alternative to tracking actual expenses.6Internal Revenue Service. 2026 Standard Mileage Rates It is simpler but almost always smaller than actual expenses paired with Section 179 or bonus depreciation on a high-value truck, and you can’t use the standard rate on a vehicle you’ve already expensed under those provisions.
Closing in the Business Name
The Bill of Sale lists the business entity as buyer, not you personally, and includes the VIN and the exact purchase price. Signatures go under official capacities, with corporate titles noted. Payment comes from the business checking account by wire or cashier’s check. Running the down payment through a personal account blurs the legal separation between you and the company and complicates the books at tax time.
Keep the signed contract, receipts, and financing documents in the company’s permanent records. They anchor your purchase date, which determines when depreciation starts, and they prove ownership transfer. The dealer usually issues a temporary operating permit valid for 30 to 60 days while permanent registration is processed, with the exact duration set by state law.
Titling, Registration, and Commercial Plates
The truck has to be titled and registered under the business entity’s name at your state’s motor vehicle agency. Sales tax is due on the purchase, and registration fees vary by state, weight class, and vehicle type. Many states use a separate commercial registration form. Titling in the business name is what supports your liability protection, commercial insurance coverage, and tax deductions all at once.
Commercial plates often carry a weight declaration that has to match the truck’s actual rated capacity. Overweight penalties at roadside inspections are expensive, so the declared weight should match the GVWR.
Federal Registrations Triggered by Weight and Interstate Use
Buying a heavier truck, or running it across state lines, brings a set of federal registrations that don’t apply to a personal vehicle.
USDOT Number
A truck with a GVWR of 10,001 pounds or more used in interstate commerce has to be registered with the Federal Motor Carrier Safety Administration, which issues a USDOT number.7Federal Motor Carrier Safety Administration. Do I Need a USDOT Number The same requirement applies to any vehicle transporting hazardous materials in intrastate commerce, regardless of weight. The number is displayed on the vehicle and is used to track safety and compliance history. Operating without one when required can bring significant fines.
Commercial Driver’s License
The truck’s weight also decides whether the driver needs a CDL. Federal regulations set three classes based on gross vehicle weight:8Federal Motor Carrier Safety Administration. Drivers
- Class A covers any combination of vehicles with a gross combination weight rating of 26,001 pounds or more, where the towed unit exceeds 10,000 pounds GVWR.
- Class B covers a single vehicle of 26,001 pounds GVWR or more, or such a vehicle towing a unit of 10,000 pounds GVWR or less.
- Class C covers vehicles below the Class A or B thresholds that are designed to carry 16 or more passengers or that transport hazardous materials.
Most standard business pickups and medium-duty work trucks fall well below 26,001 pounds and don’t require a CDL. A large flatbed, dump truck, or tractor unit will, so build training and testing time into the plan.9eCFR. 49 CFR 383.91 Commercial Motor Vehicle Groups
Form 2290 Heavy Highway Vehicle Use Tax
A truck with a taxable gross weight of 55,000 pounds or more owes an annual federal highway use tax filed on IRS Form 2290.10Internal Revenue Service. Instructions for Form 2290 Most pickups, vans, and panel trucks are well under that weight; this hits heavy-duty commercial vehicles. The tax period runs July 1 through June 30, and returns for vehicles first used in July are due by August 31.11Internal Revenue Service. When Form 2290 Taxes Are Due For a truck first used mid-year, the deadline is the last day of the month following the month of first use.
Missing the deadline draws a 4.5% penalty on tax due per month for up to five months, a separate 0.5% monthly late-payment penalty, and interest of about 0.54% per month.12Federal Highway Administration. HVUT Penalties A $550 liability can climb past $700 within five months. Many states also suspend the vehicle’s registration when proof of Form 2290 payment is missing, which parks the truck until you’re current.
IFTA, UCR, and IRP for Interstate Operations
Operating across state lines pulls in three more programs. The International Fuel Tax Agreement applies to two-axle vehicles over 26,000 pounds GVW, any three-or-more-axle vehicle, and combination vehicles over 26,000 pounds that travel in more than one state. Qualifying carriers get an IFTA license from their base state and file quarterly fuel tax returns reporting miles and fuel by jurisdiction.
The Unified Carrier Registration program requires interstate motor carriers, freight forwarders, brokers, and leasing companies to register annually and pay a fee scaled to fleet size. For 2026, a one- or two-vehicle carrier pays $46, three to five pays $138, six to twenty pays $276, and twenty-one to one hundred pays $963.13Unified Carrier Registration. Fee Brackets The fees are modest, but operating without registration draws roadside citations.
The International Registration Plan handles apportioned registration for trucks over 26,000 pounds that travel between states, distributing registration fees among the states where you operate based on miles driven in each. Vehicles at or below 26,000 pounds that cross state lines may register under IRP voluntarily. The paperwork and fee calculations add real time to the registration process, so plan for it up front.