A Rivian R1S qualifies for a Section 179 deduction because its 8,532-pound gross vehicle weight rating clears the 6,000-pound federal threshold that exempts a vehicle from the luxury automobile depreciation caps. For a business owner using the R1S more than 50% for business, that weight classification typically allows the full purchase price to be written off in the first year by stacking Section 179 with 100% bonus depreciation.
Why the 6,000-Pound Weight Rating Matters
Federal tax law limits how much you can depreciate a “passenger automobile,” which it defines as a four-wheeled vehicle rated at 6,000 pounds gross vehicle weight or less.1Office of the Law Revision Counsel. 26 U.S. Code 280F – Limitation on Depreciation for Luxury Automobiles Those luxury automobile limits cap the first-year deduction on a lighter vehicle at roughly $20,000 and stretch what remains across several more tax years.
The R1S, at 8,532 pounds GVWR, is not a passenger automobile under IRC Section 280F, so none of those annual caps apply.1Office of the Law Revision Counsel. 26 U.S. Code 280F – Limitation on Depreciation for Luxury Automobiles It can be expensed under Section 179 and bonus depreciation with far fewer restrictions. The same weight-based treatment applies to any qualifying heavy SUV, electric or otherwise.
How Much You Can Deduct Under Section 179
Section 179 lets a business deduct the full cost of qualifying equipment in the year it is placed in service instead of spreading the deduction across several years. Vehicles over 6,000 pounds GVWR qualify, but SUVs in the 6,000-to-14,000-pound range face a separate sub-cap that is lower than the overall Section 179 limit.
For 2026, that SUV-specific cap is approximately $32,000. The overall Section 179 deduction limit for all equipment combined is roughly $2.56 million, with phase-outs beginning when total equipment purchases exceed about $4.09 million.
The R1S falls inside the 6,000-to-14,000-pound band, so you can deduct up to about $32,000 of its purchase price under Section 179 in the year it is placed in service. That is well above what a lighter vehicle could claim in year one under the luxury auto caps, but on a vehicle that starts near $79,000 it does not cover the whole cost by itself.
Bonus Depreciation Covers the Rest
After Section 179 is applied, the remaining depreciable cost of the R1S can be written off through bonus depreciation. The One Big Beautiful Bill Act permanently restored 100% first-year bonus depreciation for qualifying business property acquired after January 19, 2025. That reversed a phasedown that had reduced the rate to 80% in 2023, 60% in 2024, and 40% in 2025 before the law changed.
Because the R1S exceeds 6,000 pounds GVWR and is not subject to the luxury auto caps, the full remaining cost after Section 179 qualifies for 100% bonus depreciation. Together, the two provisions can allow you to deduct the entire purchase price of the R1S in the first year, which is not possible with a vehicle rated at 6,000 pounds or less.
Sample First-Year Deduction on an $85,000 R1S
The 2026 R1S starts at approximately $79,000, and fully loaded configurations run well above $100,000. Here is how the numbers work on an R1S purchased for $85,000 and used entirely for business:
- Section 179 deduction: $32,000 (approximate 2026 SUV cap)
- Remaining depreciable cost: $53,000
- Bonus depreciation at 100%: $53,000
- Total first-year deduction: $85,000
These are deductions, not credits. They reduce your taxable income, not your tax bill dollar for dollar. At a 24% marginal federal rate, an $85,000 deduction translates to roughly $20,400 in federal tax savings. At the 37% top rate it would save about $31,450. State income taxes add to the benefit in most states.
If business use is less than 100%, both deductions scale proportionally. An R1S used 70% for business on the same purchase price yields a first-year deduction of about $59,500.
Business Use Threshold, Records, and Recapture
Both Section 179 and bonus depreciation require the vehicle to be a depreciable asset used in a trade or business. Personal commuting and errands do not count. The vehicle must be used more than 50% for business in the year it is placed in service to qualify for Section 179 at all. Drop below that threshold and you lose the accelerated deduction, leaving only standard depreciation across a multi-year schedule.
The IRS expects you to substantiate the business use percentage through contemporaneous records: a mileage log, a vehicle tracking app, or other documentation showing the date, destination, business purpose, and miles for each trip. General statements about mostly using the vehicle for work will not hold up in an audit.
There is also a recapture risk. If you claim the full Section 179 deduction in year one and business use drops to 50% or below in a later year, you will owe tax on the excess depreciation you claimed. The IRS treats the difference as ordinary income in the year business use falls short. Plan for that if your driving pattern is likely to change.
Leasing an R1S Through a Business
If you lease the R1S for your business, you deduct the business-use portion of the lease payments as a business expense rather than depreciating the vehicle. Vehicles over 6,000 pounds GVWR are not subject to the lease inclusion amounts that reduce deductions on expensive lighter vehicles, so the weight threshold works in your favor on a lease as well.
A leased vehicle is owned by the leasing company, not by you, so Section 179 and bonus depreciation belong to the lessor. Competitive lessors may factor their own tax savings into lease pricing, but there is no first-year write-off you can claim personally on a vehicle you do not own.
The Federal EV Credits No Longer Apply
The Section 30D consumer clean vehicle credit and the Section 45W commercial clean vehicle credit, both worth up to $7,500, were terminated by the One Big Beautiful Bill Act for vehicles acquired after September 30, 2025.2Internal Revenue Service. FAQs for Modification of Sections 25C, 25D, 25E, 30C, 30D, 45L, 45W, and 179D Under Public Law 119-21 Neither credit is available on a new R1S purchased in 2026, so the R1S tax strategy in 2026 runs entirely through the weight-based depreciation rules above. For a business buyer, those deductions typically deliver more federal tax savings than the old $7,500 credit did; for a personal-use buyer without a business, no federal tax benefit tied to the R1S remains.