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  • Writer's pictureFelipe Wityk Sanchez

Rules for Deducting Car Expenses for Business Owners(Tax Strategies)



The tax strategies for business owners deducting car expenses begin with the question of whether to use the relatively simpler standard mileage method that the IRS just adjusted its rates for in 2024 or the more complex calculation of the actual expenses relating to the vehicle.


However, as a result of putting in the above work small business owners may tap into some major tax reduction in the process.


The Standard Mileage Method

For 2024 taxes, the IRS upped the rate of the business mileage deduction by 1.5 cents year over year to 67 cents. As long as the taxpayer has calculated the number of miles that they traveled in the car on business, they can find the amount of their potential deduction by simply multiplying the distance by 0.67.

To use the standard mileage rate for a car you own, you must choose to use it in the first year the car is available for use in your business. Then, in later years, you can choose to use the standard mileage rate or actual expenses. For a car you lease, you must use the standard mileage rate method for the entire lease period (including renewals) if you choose the standard mileage rate.  Some good rules of the road include downloading tracking apps such as MileIQ to document the distance.

The deduction is applied based on the number of business miles driven, not the number of total miles. With the standard mileage method, it is important to keep a mile log.


Comparing the Choices

The selection of methods requires weighing the potential deductions against each other.  In one example laid out by a guide from Intuit TurboTax, a self-employed rideshare app driver used a car for business 75% of the time and logged 30,000 miles on the job. The driver’s expenses for gas, depreciation, auto insurance, maintenance, oil, tires and car washes came to $11,300 for the year. Using the actual expenses calculation in multiplying that amount by the 75% business usage, the deduction would be $8,475. For a standard mileage deduction with the previous 2023 rate of 65.5 cents a mile, however, the deduction is $19,650.

“In this example, the driver is able to deduct $11,175 more by using the standard mileage method than by using the actual expenses method,” the TurboTax tutorial stated. “The two methods can yield vastly different results. Be sure to keep all your receipts so you can calculate the deduction both ways and then choose the method that benefits you the most.”


Section 179 Deductions

The Section 179 calculations for cars run into specific limits based on their gross vehicle weight ratings. For cars under 6,000 pounds in the 2023 tax year, the deduction can go as high as $12,200. For those between 6,000 and 14,000, such as full-size sport utility vehicles, pickup trucks and vans, it can go as high as $28,900. The IRS imposes no ceilings on the deductions for the cost of other vehicles above 14,000 pounds like big-rig trucks, hearses, shuttles and cargo vans.

For self-employed or business owner clients seeking to qualify for a Section 179 deduction for vehicle expenses, IRS rules mandate that they drive in the operation of their company at least half the time in their car. To find the amount of the possible deduction for the cost of buying the vehicle, the taxpayer multiplies the percentage of time they drive for business by the lesser of the price tag or the available limit based on the weight of the car.

If you have a vehicle that, No. 1, is over 6,000 pounds and, No. 2, you use for more than 50% for business purposes, you have the ability to deduct up to 100% of the purchase price of the vehicle, and that can result in substantial savings up front for the business owners. If you meet that threshold for the 6,000-pound vehicle and more than 50% of business use, you can elect to use bonus depreciation for the rest of the purchase price.






Depreciation Determinations

Other than the more basic calculations adding up all of the costs of the car, figuring out the depreciation expenses usually proves to be the most complicated aspect of the second method.

The driver in that TurboTax case counted $3,160 in depreciation. Other taxpayers may rack up a much larger sum that makes the expense method much more attractive than the mileage one. As physical assets, cars’ depreciation expenses depend on their estimated useful life and whether the owner is using a so-called straight-line calculation or another formula.

An allowance for bonus depreciation becomes available only in the first year that a business uses a new or pre-owned car. The Tax Cuts and Jobs Act of 2017 pushed down the percentage of depreciation that’s eligible for the bonus as well. For 2023, taxpayers can only count a bonus of up to 80% of the depreciation. In 2024, that percentage will fall to 60%, followed by 40% in 2025, 20% in 2026 and 0% by 2027. There are also limitations on cars classified as luxury vehicles.

While the higher standard deduction under the Tax Cuts and Jobs Act has redced the number of taxpayers itemizing their costs each year, the available car write-offs can help self-employed or business owners reap savings.


To see past publications please visit our Knowledge Center.

The information presented here should not be construed as legal, tax, accounting, or valuation advice. No one should act on such information without appropriate professional advice and after a thorough examination of the particular situation.


Article obtained thanks to Gallerors Robinson Certified Public Accountants and advisors

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