Every year around Thanksgiving, someone tells you the same thing. Your buddy at the supply house, the salesman at the dealership, maybe even your brother-in-law: “Had a good year? Buy a truck before December 31. It’s a write-off.”
Sometimes that’s good advice. Sometimes it’s an expensive way to feel better about a tax bill.
Here’s the short answer. Buying a truck in December makes sense when your business actually needs the truck and can comfortably carry the payments after the tax savings are spent. It doesn’t make sense when the tax break is the main reason you’re buying. A write-off moves a deduction into this year. It doesn’t make the truck cheaper.
Let’s walk through the real math.
What “write-off” actually means
A write-off is a deduction. It lowers your taxable income, which lowers your tax. But it saves you tax at your tax rate, not dollar for dollar.
If you’re in the 24% federal bracket and you deduct a $70,000 truck, you don’t save $70,000. You save roughly 24% of it, about $16,800 in federal income tax. You still spent $70,000.
For 2026, two federal rules let you deduct most or all of a work vehicle’s cost in the year you start using it, instead of spreading it over several years.
- Bonus depreciation. Federal tax law passed in 2025 made 100% bonus depreciation permanent for qualifying property acquired after January 19, 2025. That means the full cost of a qualifying truck can generally be deducted in the first year.
- Section 179. This lets businesses expense equipment up to a yearly limit, which is $2,560,000 for 2026. That limit is far above what most trade shops spend in a year.
The practical difference for most owners: a Section 179 deduction can’t be larger than your business income, while bonus depreciation can create a loss that may carry forward. Your CPA will choose which one to use, or a mix of the two.
Which trucks qualify for the big deduction
Weight matters. Passenger cars and light trucks have much lower yearly depreciation limits. Vehicles with a gross vehicle weight rating over 6,000 pounds escape those limits.
That’s why heavy-duty pickups like an F-250 or RAM 2500, and most full-size work vans, are the usual examples. Don’t guess on your vehicle’s weight. Open the driver’s door and check the sticker on the door frame for the GVWR.
A few more details:
- Heavy SUVs have their own Section 179 cap, $32,000 for 2026. Bonus depreciation can generally cover the rest of the cost.
- Business use has to be more than 50%. If you use the truck 80% for work, you can deduct 80% of the cost. If business use later drops to 50% or below, you may have to pay back part of the deduction.
- Keep records. A simple mileage or use log protects the deduction if you’re ever asked to prove it.
The December 31 detail people miss
Signing the paperwork isn’t enough. The truck has to be placed in service by December 31, which means delivered and ready to work.
If you sign for a truck on December 20 but it doesn’t arrive until January 8, the deduction lands next year, not this one. With dealer inventory and upfitting (racks, shelving, a utility body) often taking weeks, a truck you decide on in late December may not count for this year at all.
The math nobody shows you
Here’s an example. The numbers are illustrative, so your tax rate, price, and loan terms will be different.
Say you buy a $70,000 heavy pickup in December. You use it 100% for business. You put $10,000 down and finance $60,000 over five years at about 7.5%. Your payment is about $1,200 a month, or roughly $14,400 a year.
You’re in the 24% federal bracket, and you deduct the full cost this year.
Year one looks great:
- Cash out: $10,000 down
- Federal tax saved: about $16,800
You came out ahead on paper, and that’s the part everybody talks about.
Years two through five look different:
- Cash out: about $14,400 a year in payments
- Depreciation deduction left: almost none, because you used it all in year one
Over the life of the loan, you’ll spend about $82,000 on the truck, counting the down payment and interest. Your federal tax savings from depreciation are roughly the same $16,800 whether you take them all this year or spread them out. The loan interest is generally deductible too, which your CPA will factor in. The year-one deduction changes when you save, not how much the truck costs.
That timing can still be valuable. Saving $16,800 this year instead of over five years is real money. But only if the payments that follow fit comfortably in your cash flow, including in your slowest months.
The Georgia twist
If your business files in Georgia, there’s one more wrinkle.
Georgia doesn’t follow federal bonus depreciation. The state’s 2026 tax law, HB 1199, signed in March 2026, updated Georgia’s tax code to match most federal changes but kept that exception in place. On your Georgia return, the bonus depreciation you took federally is added back, and the truck is generally depreciated on a regular schedule over several years instead.
Georgia does partially follow Section 179, so depending on your situation there may be a larger state deduction available this year. That’s a question for your CPA before you buy, not after.
What it means in practice: your Georgia tax savings in year one will likely be smaller than your federal savings. If you’re counting on a big state deduction to make the numbers work, check first.
South Carolina has its own rules too. If your business files there, ask your CPA how the state treats the purchase.
When buying makes sense, and when it doesn’t
Before you sign, run through these five questions.
- Do you need this truck now? Is there a tech waiting for a vehicle, a route you can’t cover, or a truck that’s costing you in repairs and downtime? If the answer is “not really,” the tax break alone isn’t a good reason.
- Can you make the payment in your slowest month? Look at your worst month from the last year, not your best. If $1,200 more a month would have hurt then, think twice.
- Is this year unusually good? A deduction is worth more in a high-income year. If next year looks just as strong, waiting until January may cost you very little.
- Have you compared the alternatives? Leasing, buying used, or waiting a few weeks can all change the math.
- Has your CPA run the numbers? Before you sign, not in April.
One more thing to know: when you sell or trade the truck later, part of the deduction you took can come back as taxable income. Owners who trade trucks every few years should plan for that.
What your books need to show
Even a smart purchase can cause problems if the books don’t reflect it properly. Here’s what should be in place:
- The truck is recorded as an asset, not an expense. It goes on your balance sheet, with the loan recorded as a liability. If the full price shows up as an expense in your books, your profit and your financial statements are wrong, which matters when you apply for a loan or line of credit. Our Home & Field Services clients see this mistake often when they first come to us.
- Payments are split between principal and interest. Only the interest is an expense. The rest pays down the loan.
- The paperwork is on file. Title in the business name, the purchase agreement, the date the truck was delivered and put to work, and a business-use log.
- The payment is in your forecast. A new truck payment should be part of your cash flow plan before you commit to it, not a surprise in February.
That’s where a bookkeeper who knows trade businesses earns their keep. At ClearLedgers, our Budgeting & Cash Flow Forecasting service shows what a new payment does to your cash month by month. Full-Service Bookkeeping keeps the truck, the loan, and every payment recorded correctly. And when you’re weighing a bigger decision, Financial Strategy helps you look at it from every angle. We work alongside your CPA, so the person preparing your return gets clean, accurate numbers to work from.
This article is general information about federal and Georgia tax rules for business vehicles for the 2026 tax year, current as of October 2026. It isn’t tax advice. Limits change every year, and the right choice depends on your business, so talk with your CPA before making a purchase decision.
