Heavy Duty Truck Section 179 and Bonus Depreciation for 2024 Purchase - Tax Filing Questions
Hey everyone, I've got a question about a truck purchase for our construction business (we're an LLC). We need a new heavy duty truck specifically for hauling workers and materials between job sites, plus towing our equipment trailer. This would be strictly for business use - everyone has their own personal vehicles. I'm struggling to understand how Section 179 deduction and bonus depreciation work together for our 2024 taxes (filing in 2025). Is bonus depreciation at 60% for purchases made this year? For context, we're looking at either a base Ram Tradesman Crew 3500 diesel at around $97k or a base Crew Silverado 3500 diesel at about the same price. Our company is definitely profitable this year with substantially more revenue than the cost of this truck. My main questions: - How much of the $97k can we deduct on our 2024 taxes when filing in 2025? - Is there some calculator to figure out the maximum deduction available? - If we take the maximum Section 179 and bonus depreciation, can we still continue depreciating the truck until we've deducted the full purchase price? Or is it one and done? - Also, if we use these depreciation methods, can we still deduct actual operational costs like fuel, maintenance, etc.? Thanks for any help with this tax situation!
20 comments


Leeann Blackstein
You've got a few things to understand with Section 179 and bonus depreciation for your heavy-duty truck purchase. For 2024, Section 179 allows you to deduct the full cost of qualifying equipment (including heavy-duty trucks over 6,000 lbs GVWR used for business) up to $1,220,000. Your $97k truck would fall well within this limit. Bonus depreciation is indeed 60% for 2024 purchases. This applies to the remaining amount after any Section 179 deduction. With your situation, you have several options: 1. Take the full $97k as a Section 179 deduction in 2024 2. Take partial Section 179 and apply bonus depreciation to the remainder 3. Skip Section 179 and just use bonus depreciation (60% in year 1) plus regular depreciation for the rest For operational costs - yes, fuel, maintenance, insurance, etc. are always deductible as regular business expenses regardless of how you handle the depreciation.
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Ryder Greene
•Thanks for the explanation! I think I'm still a bit confused. If we went with option 2 and took partial Section 179, let's say $50k, would we then apply the 60% bonus depreciation to the remaining $47k? And what would that look like in terms of actual numbers?
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Leeann Blackstein
•If you took a $50,000 Section 179 deduction, you'd have $47,000 remaining basis. The 60% bonus depreciation would then apply to that remainder, giving you an additional $28,200 deduction ($47,000 × 60%). Regular MACRS depreciation would then apply to the remaining basis of $18,800 over several years. For heavy trucks, you'd use a 5-year recovery period, allowing about $3,760 in additional first-year depreciation (20% of remaining basis). So your total first-year deduction would be approximately $81,960 ($50,000 + $28,200 + $3,760).
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Carmella Fromis
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Theodore Nelson
•Does taxr.ai actually explain the reasoning behind the recommendations? I'm trying to understand this stuff myself rather than just blindly following suggestions.
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AaliyahAli
•I'm curious - does it handle specialized vehicles like utility trucks with mounted equipment? We have some F-550s with specialized equipment installations that I've been told might have different depreciation schedules.
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Carmella Fromis
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Theodore Nelson
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Ellie Simpson
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Arjun Kurti
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Raúl Mora
I have to admit I was completely wrong about Claimyr. After posting my skeptical comment, I decided to try it anyway because I was desperate to resolve a question about vehicle depreciation for our company trucks. The service actually did exactly what it claimed - I got a call back in about 15 minutes connecting me directly to an IRS representative. No waiting on hold, no phone tree navigation, just straight to a helpful person. The agent clarified that for our situation with heavy duty trucks purchased in 2024, we could claim the full Section 179 deduction and still take regular business deductions for operating expenses. She also confirmed the correct bonus depreciation percentage and gave me specific guidance on how to document business-only use. Saved me hours of frustration and gave me confidence in our approach to the truck purchase!
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Margot Quinn
Something important to consider that hasn't been mentioned - if you take full Section 179 on the truck and then don't use it 100% for business in future years, you could face recapture issues. The IRS requires the asset to remain in primarily business use for its useful life. So if you're planning to eventually transition this truck to personal use before the end of its depreciation period, you might want to consider using regular depreciation instead of Section 179.
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Evelyn Kim
•I've always wondered about this. What's considered the "useful life" for a heavy duty truck? Is that the same as the depreciation period? And what percentage is considered "primarily business use"?
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Margot Quinn
•The useful life for depreciation purposes of a heavy duty truck (over 6,000 lbs) is 5 years under MACRS, though in reality these vehicles often last much longer. For "primarily business use," the IRS generally considers this to be more than 50% business use. If business use drops below 50% in any year after taking Section 179, you would need to recapture (pay back) a portion of the deduction as ordinary income. This is why documentation of business use is so important - vehicle logs, mileage records, and purpose of trips should be maintained, especially if there's any potential for personal use.
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Diego Fisher
I think everyone is overcomplicating this. We just bought a 2024 F-350 diesel for our construction business for $94k. Our accountant recommended we take the full amount as a Section 179 deduction since we're having a very profitable year. She said we can still deduct ALL operational expenses (fuel, maintenance, insurance, etc.) regardless of how we handled the initial purchase price. The only requirement is that we use it 100% for business, which we do. We have separate personal vehicles.
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Henrietta Beasley
•That approach works if you're having a very profitable year, but it might not be optimal for everyone. Sometimes spreading out deductions through bonus depreciation plus regular depreciation gives better tax advantages over multiple years, especially if you expect higher income in future years.
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Luca Russo
Great discussion here! As someone who's been through this exact situation with multiple heavy truck purchases, I'd add a few practical considerations: 1. **Cash flow timing** - If you're profitable this year but uncertain about next year's income, taking the full Section 179 deduction now might be smart. But if you expect steady or growing profits, spreading it out could be better. 2. **State tax implications** - Don't forget that some states don't follow federal Section 179 rules exactly. Make sure to check how your state handles these deductions. 3. **Equipment financing** - If you're financing the truck, you can still claim Section 179 on the full purchase price even though you're making payments over time. 4. **Alternative Minimum Tax (AMT)** - For some businesses, large Section 179 deductions can trigger AMT issues, though this is less common with the current tax law. The key is matching your deduction strategy to your specific business situation. What works for one construction company might not be optimal for another, even with similar truck purchases. Also, keep excellent records of business use from day one - GPS logs, job site documentation, etc. The IRS loves to scrutinize vehicle deductions, especially on expensive trucks.
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Noland Curtis
•This is really helpful context! I hadn't considered the state tax implications at all. Our LLC is in California - do you know if they follow the federal Section 179 rules, or should I be researching this separately? Also, the point about AMT is interesting. We're expecting around $800k in revenue this year - is that the kind of income level where AMT becomes a concern with a large Section 179 deduction?
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