100% Bonus Depreciation Is Permanent Now: What It Changes for Construction Business Owner Tax Planning

A contractor called us last December ready to buy a $90,000 excavator he didn't need yet, purely because he'd heard the write-off was shrinking. He was right that it was shrinking. He was wrong that panic-buying was the move. That whole conversation just changed.

The One Big Beautiful Bill Act, signed in July 2025, made 100% bonus depreciation permanent. Any qualifying equipment you buy and put to work after January 19, 2025 can be fully deducted the year you place it in service, with no scheduled phase-out. For years, construction business owner tax planning came with a ticking clock. Bonus depreciation was stepping down about 20 points a year and was headed to 40% in 2025. That clock is gone. Here's what actually changed, and the timing decision that replaced the old one.

What the rule does now

Bonus depreciation lets you deduct the full cost of qualifying business property in the year it's placed in service. Skid steers, excavators, trailers, generators, compressors, work trucks, and most tools with a recovery period of 20 years or less qualify. Before the new law it was phasing out. Now it's locked at 100% for anything placed in service after January 19, 2025.

Section 179 does something similar and got bigger too. For 2026 you can expense up to $2.56 million, with the benefit phasing out once you place more than $4.09 million of property in service. Many contractors never come near those ceilings, so the two tools overlap. The short version: between Section 179 and 100% bonus, a normal equipment year is fully deductible.

Vehicles have their own rules. Many work trucks over 14,000 pounds GVWR can qualify for a full first-year deduction when used primarily for business. A heavy SUV between 6,001 and 14,000 pounds is capped around $32,000 under Section 179, but you can apply 100% bonus depreciation to whatever's left. Business use has to be over 50%, and the vehicle has to be in service, not just paid for.

The old timing game is over. A better one took its place.

The panic buy used to make a certain kind of sense. If the deduction was worth less next year, buying now protected it. That reason is gone. The scheduled phase-out is gone, so under current law the deduction is no longer set to shrink over time.

What still matters is which year you take it. "Placed in service" means available and ready to use, not ordered, not paid for. It's sitting in your yard ready to run. Buy a loader on December 28 and put it to work, the deduction lands this year. Take delivery January 3, it lands next year.

That hands you a real lever. If this was a big revenue year and next year looks slower, pulling a purchase into December drops the deduction against your higher income. If you had a down year and next year is already booked solid, waiting until January puts the write-off where it does more good. The decision went from "beat the phase-out" to "match the deduction to the income." That's the version of construction business owner tax planning that actually moves the number.

The trap the deduction sets

A full write-off is not the same as free equipment. We say this to contractors constantly. A 100% deduction on a $90,000 machine doesn't save you $90,000. It saves you your tax rate times $90,000, so maybe $25,000 to $35,000 depending on your bracket. You still spent the rest in real cash.

Buying gear you don't need to shrink a tax bill is spending a dollar to save thirty cents. The deduction is a reason to time a purchase you were already going to make. It's not a reason to make one.

There's a cash flow angle too. Contractors run on seasonal income and lumpy receivables. Front-loading the whole deduction feels good in April, but it also means you've used up the depreciation deduction that otherwise would have been available in future years. For some owners, spreading depreciation out is the smarter play. That's a numbers conversation, not a default setting.

What to do with this

Look at your equipment plans for the rest of the year and ask two questions. What do I actually need, and which tax year does the deduction help most? If you've got a strong year and a purchase you were planning anyway, timing it before December 31 is worth a hard look. If cash is tight or next year looks bigger, there's no rush now that the rate is permanent. Solid construction business owner tax planning treats the write-off as one input, not the whole decision.

Run the real numbers before you sign anything.

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