Can You Write Off a Vehicle in an S-Corp? 2026 Rules

#Understand the two ownership paths before picking one

This is a decision, not background reading. Every S-corp owner using a vehicle for business has to pick a structure. Pick the wrong one. You could leave money on the table. You could generate unexpected W-2 income. Or you could create a documentation problem the IRS loves to audit.

#Path A: personally-owned vehicle with accountable plan reimbursement

You own the car personally. Your S-corp reimburses you for business mileage at the IRS standard mileage rate. For 2026 the rate is 72.5 cents for miles driven January 1 to June 30. It is 76 cents for miles driven July 1 to December 31. Split your mileage log at June 30. The reimbursement is tax-free income to you as the employee-owner. It is also fully deductible by the corporation as a business expense. No vehicle goes on the corporation’s balance sheet. No depreciation schedule to manage.

#Path B: corporation-owned vehicle

The S-corp titles the vehicle in the corporation’s name. The corp buys it, insures it, and pays all operating costs. The corporation deducts actual vehicle expenses: §179, bonus depreciation, fuel, insurance, maintenance, and registration. Any personal use by the owner must be tracked and reported as a taxable fringe benefit on your W-2.

#The default recommendation for most owners

For most S-corp owners driving one vehicle that doubles as a family car, Path A (accountable plan) is the right answer. You keep the car out of the corporation. You skip the fringe benefit tracking requirement. You still capture a full business deduction through reimbursement.

Path B makes sense when: the vehicle is used almost exclusively for business. It also qualifies as a heavy vehicle, GVWR above 6,000 lbs. And the first-year depreciation math produces meaningful tax savings. A true work truck or company van is the ideal candidate. A family SUV that parks in the school pickup line is not.

#Use the accountable plan to reimburse personal mileage

The accountable plan is the most underused S-corp tax tool. Properly set up, it lets the corporation reimburse the owner for business mileage. That reimbursement never touches your W-2 or your self-employment tax base.

#How the reimbursement works

The mechanics are straightforward:

• You drive your personal vehicle for a business trip, like a client visit, site inspection, supply run, or business errand.
• You log each trip: date, starting point, destination, business purpose, and miles driven.
• You submit a mileage report to the corporation monthly or quarterly.
• The corporation pays you miles times 72.5 cents.
• The corporation books the payment as a business expense deduction.
• You receive the check with zero income tax, zero FICA tax, and zero SE tax.

The IRS has allowed this since the accountable plan rules were codified under IRC §62(a)(2)(A) and Treas. Reg. §1.62-2. The standard mileage rate is set by the IRS to approximate average vehicle operating costs. Notice 2026-10 set 72.5 cents for January 1 to June 30, 2026. The IRS standard mileage page shows 76 cents for July 1 to December 31, 2026 (IR-2026-29). A year of 12,000 miles, split evenly, is $8,910.

#The dollar math on a typical year

Consider an S-corp owner who drives 12,000 business miles per year:

• Reimbursement: 12,000 miles × $0.725 = $8,700
• Federal income tax on the reimbursement: $0
• FICA tax: $0
• State income tax (in most states): $0
• Corporation’s deduction: $8,700
• Federal tax savings in a 32% bracket: $8,700 × 32% = $2,784

For owners driving 20,000 business miles per year, the reimbursement hits $14,500 and federal savings approach $4,640 before state taxes. And it takes nothing more than a mileage log.

#What makes the plan actually “accountable”

The IRS requires three elements for the reimbursements to be tax-free. If any element is missing, the entire reimbursement becomes taxable wages:

• Business connection: the expense must have a legitimate business reason
• Substantiation: the mileage log must capture date, destination, business purpose, and miles, recorded contemporaneously (not reconstructed at year-end)
• Return of excess: return any extra money within a reasonable time. The IRS safe harbor is 120 days. Turn in your mileage log within 60 days of the trip, to stay in the safe harbor

Use a mileage tracking app or a well-maintained spreadsheet. The documentation requirement is the only real work here, and it is not much work if you stay current.

#Decide between standard mileage and actual expense

Once you know which path you are on, you need to pick a calculation method. For personally-owned vehicles on an accountable plan, you reimburse at the standard mileage rate or actual expenses. For corporation-owned vehicles, the corp tracks actual expenses and claims depreciation.

#Standard mileage: simpler and usually better for personal vehicles

At 72.5 cents per mile, the standard mileage rate bundles fuel, oil, tires, insurance, maintenance, registration, and a depreciation equivalent into one number. Track miles, multiply, done.

For most personal vehicles, the standard rate beats actual expense because:

• No need to track individual expenses month by month
• The rate tends to be generous for fuel-efficient vehicles where actual fuel costs are low
• No risk of the depreciation cap problem that hits passengers cars under actual expense
• You can switch to actual expense in later years if it becomes advantageous. You cannot switch back to standard mileage, though, if you started with actual expense and took §179

#Actual expense: required for corporate ownership and big deductions

If the corporation owns the vehicle and you plan to claim §179 or bonus depreciation, actual expense is the only option. The standard mileage rate and §179 cannot both apply to the same vehicle in the same year.

Actual expense covers: fuel, oil, tires, insurance, registration, repairs, washing, and depreciation including §179 and bonus. All costs are pro-rated by the business-use percentage. A vehicle used 80% for business produces an 80% deduction on each expense.

One rule to know: say you use actual expense, with §179 or accelerated depreciation, in year one. You cannot switch back to standard mileage for that vehicle in future years. The §179 election is a permanent track commitment. Choose carefully.

#Structure corporation ownership correctly

If the vehicle is going into the corporation, the setup matters for both the deduction and the fringe benefit treatment.

#Title, insurance, and all costs must flow through the corporation

The vehicle must be titled in the corporation’s legal name. Not your personal name. Not your name “doing business as” the corporation. The exact legal name of the S-corp. The corporation should also carry the insurance policy, pay registration, and run all fuel and maintenance through the corporate bank account.

If you personally titled the car and the corporation reimburses you for expenses, that is an accountable plan arrangement (Path A), not corporate ownership. The two structures cannot be mixed on the same vehicle.

#Personal use becomes taxable W-2 income

Here is what most S-corp owners do not expect. When you drive a company-owned car for personal purposes (commuting, family trips, personal errands), that personal use is a taxable fringe benefit. The corporation must calculate the value of personal use and include it in your W-2.

The IRS allows several valuation methods:

• Annual Lease Value method: based on the IRS’s lease value table tied to the car’s fair market value
• Cents-per-mile method: personal miles times 72.5 cents per mile (same rate as the standard mileage rate for 2026)
• Commuting valuation: an owner who owns 1% or more of the S-corp cannot use the $1.50 one-way commute rule. That owner can use the annual lease value method instead, or the cents-per-mile method if the vehicle meets its value and use tests

The personal use amount gets added to your W-2 wages. That means income tax and FICA on that value. Say an owner drives a $60,000 company car 30% for personal use. The annual fringe benefit could easily add $5,000 to $10,000 of W-2 income.

That is why the accountable plan is the cleaner answer for most single-vehicle owners. The home office decision follows the same logic: personal ownership with accountable reimbursement is often simpler than transferring the asset into the corporation.

#Take §179 and bonus depreciation on a heavy vehicle

This is where corporate vehicle ownership becomes genuinely compelling. Say your S-corp buys a vehicle with a GVWR above 6,000 lbs. You can combine §179 with 100% bonus depreciation, made permanent by the One Big Beautiful Bill Act, for a first-year deduction. That deduction can cover the full purchase price of a heavy SUV, truck, or van.

#The GVWR threshold matters more than sticker price

The gross vehicle weight rating (GVWR) is printed on every vehicle’s door jamb sticker. It is the manufacturer’s maximum loaded weight, not the empty curb weight. Popular vehicles that clear 6,000 lbs: Chevy Suburban, Ford Expedition, GMC Sierra 1500, Ram 1500, Toyota Land Cruiser, and most full-size pickup trucks.

Vehicles at or below 6,000 lbs GVWR face the luxury auto caps covered in the next section. Vehicles above 6,000 lbs do not face those caps. That difference can be tens of thousands of dollars in year-one deductions.

#How §179 stacks with bonus depreciation on a heavy SUV

Under IRC §179(b)(5), the §179 deduction on an SUV is capped at approximately $32,000 for 2026, inflation-adjusted annually. “SUV” here means a four-wheeled vehicle designed mainly for passenger use, with a GVWR between 6,001 and 14,000 lbs. The $32,000 SUV cap has two exceptions. It does not apply to a pickup with a cargo bed at least 6 feet long, open or capped, not directly reachable from the passenger compartment. And it does not apply to a cargo van with no seats behind the driver. A pickup with a shorter bed is still under the cap. Bonus depreciation can still cover the rest of the cost.

But the story does not stop at $32,000. Under the OBBBA, 100% bonus depreciation is now permanent (see the full OBBBA bonus depreciation breakdown). Bonus depreciation applies to the remaining depreciable basis after §179 is taken.

Example: $85,000 Ford Expedition, 90% business use

• Business-use cost basis: $85,000 × 90% = $76,500
• §179 deduction (heavy SUV cap under §179(b)(5)): $32,000
• Remaining depreciable basis: $76,500 - $32,000 = $44,500
• 100% bonus depreciation on remaining basis: $44,500
• Total year-one deduction: $76,500 (the full business-use portion)
• Personal-use portion ($8,500): carried as an asset, no current deduction

In year one the deduction could cut federal tax by about $24,480 at the 32% bracket. This is a timing gain. If you sell the vehicle later, the depreciation you took is taxed as ordinary income. Personal use also adds to your W-2.

Just so you know: a pickup truck or cargo van with GVWR above 6,000 lbs is not subject to the §179 SUV cap. Take a Ram 2500 or cargo Mercedes Sprinter used for business. It can take full §179, up to $2,560,000 for 2026, with 100% bonus on any remaining basis. First-year deduction equals full business-use cost basis.

#The 50% business-use floor is non-negotiable

§179 and bonus depreciation both require more than 50% business use. Say business use drops to 50% or below in any year the vehicle is on the depreciation schedule. You must then recapture the accelerated deductions as income. Track business use with your mileage log. This is especially important on vehicles that are also personal family cars.

#Understand the luxury auto caps on passenger cars

If the S-corp owns a passenger automobile with GVWR at or below 6,000 lbs, IRC §280F applies. These limits are called the “luxury auto caps,” but they apply to virtually every passenger sedan, compact SUV, and crossover regardless of actual price. A $28,000 Honda Accord faces the same cap as a $90,000 BMW.

#What the §280F cap looks like in dollars

For 2026 (Rev. Proc. 2026-15), the first-year depreciation caps on passenger automobiles are:

• Year 1 with bonus depreciation: $20,300 (Rev. Proc. 2026-15)
• Year 1 without bonus depreciation: $12,200
• Years 2 and beyond: limited to several thousand dollars per year, with full cost recovery taking six to eight years

There is no way to accelerate past these caps on a sub-6,000 lb vehicle. §179 cannot break through them. Bonus depreciation cannot break through them. They are hard annual limits on deductible depreciation per vehicle.

#The $60,000 car vs the $60,000 heavy SUV

If your S-corp buys a $60,000 luxury sedan in 2026:

• Year 1: $20,300 maximum deduction (with bonus)
• Remaining unrecovered basis after year 1: $39,700
• Recovery timeline: 6 to 8 more years at capped annual amounts
• Total first-year tax savings at 32%: $20,300 × 32% = $6,496

If your S-corp buys a $60,000 heavy SUV in 2026 (GVWR above 6,000 lbs):

• Year 1: $60,000 potential full deduction (at 100% business use, combining §179 and bonus)
• Recovery timeline: one year
• Total first-year tax savings at 32%: $60,000 × 32% = $19,200

Same price. Same year. $12,736 difference in year-one tax savings based entirely on GVWR.

#Common questions

Can my S-corp reimburse me for a personally-owned car through the accountable plan? Yes, and this is the most common setup. You own the vehicle, keep a mileage log, and submit it to the corporation. The corporation reimburses you at 72.5 cents per mile for 2026. The reimbursement is tax-free to you and deductible by the corp. No vehicle goes on the balance sheet, and you avoid the fringe benefit reporting that comes with corporate ownership.

What happens to my W-2 if I have personal use on a company car? Personal use of a corporation-owned vehicle is a taxable fringe benefit. The corporation values it using an IRS-approved method: the annual lease value table, the cents-per-mile method, or commuting valuation. It then adds that value to your W-2. You pay income tax and FICA on that amount. This is a real cost that is easy to underestimate when you first structure corporate ownership.

Does a used vehicle qualify for §179 and bonus depreciation? Yes, with one condition. Bonus depreciation requires that the taxpayer (or any predecessor) has not previously claimed depreciation on the vehicle. A used SUV bought from a dealership qualifies. A vehicle you already own and move into your S-corp does not qualify for section 179 or for bonus depreciation. The corporation takes your cost basis and normal depreciation, limited by the luxury auto caps if the vehicle is under 6,000 lbs GVWR. A vehicle the corporation buys from an unrelated seller can qualify.

What is the 50% business-use rule for §179? Both §179 and bonus depreciation require that you use the vehicle more than 50% for business in the year the deduction is taken. Say you take §179 in year one at 80% business use. Say business use then drops to 45% in year three. The IRS requires you to report recapture income, which means paying back a portion of the deduction. Track business use with a mileage log every year the vehicle is on the depreciation schedule.

Can my S-corp take the standard mileage rate instead of actual expense? The standard mileage rate is designed for employees using personally-owned vehicles. For a corporation-owned vehicle, actual expense is the appropriate method. You cannot claim §179 and then reimburse mileage at the standard rate for the same vehicle. Once you claim §179 or accelerated depreciation, you are locked into the actual expense method for that vehicle’s life.

What if my vehicle GVWR is just under 6,000 lbs? Then you are in luxury auto cap territory under §280F for the life of the vehicle. The caps apply based on GVWR, not weight class or marketing category. Some vehicles marketed as SUVs come in under 6,000 lbs GVWR. Check before you buy, not after.

How does the vehicle deduction coordinate with the Augusta Rule? The Augusta Rule covers home rental income to the corporation. Vehicle reimbursement through the accountable plan covers mileage. These operate on separate expense categories, so they do not conflict. Many S-corp owners run the accountable plan for vehicle and home office expenses alongside the Augusta Rule for business meeting income. The strategies stack without overlap.

Is there a limit on how many vehicles can qualify for §179 in one year? No per-vehicle limit on the count, only the overall §179 ceiling ($2,560,000 for 2026) and the special SUV cap ($32,000 per SUV under §179(b)(5)). A company operating a fleet of qualifying vehicles can take §179 on each one. That is subject to the overall annual deduction cap and any business income limitation.

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#Ready to figure out which setup fits your situation?

The right answer depends on several things. Your specific vehicle. How much you actually drive for business. Whether your GVWR clears 6,000 lbs. And whether the first-year deduction math justifies the fringe benefit tracking that corporate ownership requires.

We work through that analysis quickly. You will have a clear recommendation before the call ends.

Book a 20-minute Tax Discovery — Google Meet, no pitch, free advice either way. If you want to see everything we do for S-corp owners beyond vehicle deductions, the tax planning advisory page covers the full scope. We don’t do surprises.