Year-End Tax Planning for Construction Business Owners: 10 Legal Moves Most Contractors Miss
A remodeler we talked to this fall was sitting on his best year ever and bracing for the tax bill like it was weather. Nothing he could do about it.
That’s the part most contractors get wrong. The tax code is written to reward people who own the business and take the risk, not the people who clock in, and almost none of that reward is automatic. You have to set it up, and most of it has to be in place before December 31.
Year-end tax planning for construction business owners is not one big move. It’s a stack of smaller ones, and the contractors who keep the most are usually running several at once. Here are ten that are fully legal, built for how a trade business actually makes money, and worth checking before the year closes.
1. Elect S-corp status
If you’re netting six figures and still filing as a sole proprietor or single-member LLC, you’re paying 15.3% self-employment tax on every dollar of profit. An S-corp splits your pay into a salary and a distribution, and the distribution isn’t hit with that tax. On a contractor netting $200K, the gap is real money. It only works if payroll is actually run, so this is a setup, not a checkbox.
2. Set your salary at the right number
The S-corp election lives or dies on the salary. Too low to dodge more tax and you’re inviting a problem if anyone looks. Too high and you’ve handed back the savings, because that’s the money getting taxed. A defensible number tracks your role, your revenue, and what the market pays someone who does what you do. It’s a live decision that should move as the business grows, not a figure you set once and forget.
3. Put your kids on real payroll
A child doing real work on your crew, cleanup, running materials, jobsite photos, can earn up to $16,100 in 2026 before owing a dollar of federal income tax, because that’s the standard deduction. The business deducts the wages. Here’s the catch the viral posts skip: that paycheck only escapes Social Security and Medicare tax if your business is a sole proprietorship or a partnership owned only by you and your spouse. Run an S-corp and the wages still carry payroll tax unless the arrangement is built correctly. The work has to be real and the pay has to be reasonable for the job.
4. Rent your home to your business
The Augusta Rule lets you rent your home to your business for up to 14 days a year and collect that rent tax-free, while the business deducts it. The quarterly planning session, the crew meeting, the safety training you already hold, those can count if you document them and charge a fair market rate. Fourteen days is the ceiling. Cross it and the whole thing changes.
5. Write off trucks and equipment in full
Bonus depreciation is back to 100% and permanent under the 2025 law, so a truck, trailer, skid steer, or piece of equipment bought and put to work this year can be deducted in full this year instead of over five or seven. Section 179 covers up to $2.56 million in 2026 on top of the rules you already know. Work vehicles over 6,000 pounds gross weight open up the heaviest write-offs, which is most three-quarter-ton and one-ton trucks.
6. Time the big purchase to the right year
A $70,000 truck bought December 31 and one bought January 1 land in two different tax years. On a strong-profit year, pulling the purchase into this year can be worth thousands. On a slow year, waiting can be the smarter call because the deduction is worth more against higher income later. The point is to decide on purpose, not by whenever the dealer has the unit.
7. Open a retirement plan before the deadline
A Solo 401(k) or SEP lets you move a large chunk of profit into retirement and deduct it. The timing matters: a Solo 401(k) generally has to be established by December 31 to make this year’s employee contributions, while a SEP can be opened up to your filing deadline. For an owner having a high-income year, this is one of the biggest single deductions available, and it builds the wealth side at the same time.
8. Reimburse yourself with an accountable plan
When you pay out of pocket for mileage, tools, your phone, or a home office, an accountable plan lets the business reimburse you. The company deducts it and the money comes to you tax-free. Without the plan, those costs often just disappear, especially the home-office and vehicle miles that add up fast across a season of driving between jobs.
9. Protect your 20% QBI deduction
The 20% qualified business income deduction got made permanent in the 2025 law, which means owners can knock up to a fifth off their taxable business profit. It phases out at higher incomes and interacts with your salary number, so the S-corp salary you set in move two can quietly cost you part of this deduction if nobody’s watching how the pieces fit together.
10. Pay estimated taxes on a real projection
Most penalty notices we see come from one habit: paying this year’s estimates based on last year’s number. On a year where revenue jumped, that leaves you short, and the IRS charges interest on the gap. Run a projection in the fourth quarter while there’s still time to act, then pay the Q4 estimate due January 15 on what you’ll actually owe. It’s the difference between a plan and a surprise.
What to actually do with this
Go down the list and mark the ones that could fit your business. Most have conditions, deadlines, or a right way and a wrong way to set them up, and several close on December 31. The contractors who keep the most aren’t using secret moves. They’re using these, on purpose, with someone checking the math.
If you want to know which of these apply to your numbers this year, that’s what the 2026 Tax Savings Blueprint is for. We project what you’re on track to owe, show you which moves are worth making before year-end and what each is worth, and put them in order. It starts with a free intro call. Book your free call here!