Year-End Tax Planning for Contractors: 2026 Checklist
Year-end tax planning for contractors works best in October and November, not the last week of December. By then, most of your big jobs are far enough along that you can project the year with real numbers, and you still have time to act. Once January 1 arrives, most of the options on this list are gone for 2026.
This checklist is written for owners and controllers of bonded commercial subcontractors and general contractors. Work through it with your tax advisor, mark what applies, and assign a date to each item.
Why Year-End Tax Planning for Contractors Is Different
A contractor's taxable income can swing hard in the last quarter. A single change order, a closeout, or a fade on a large job can move profit by hundreds of thousands of dollars. Your accounting method for long-term contracts also controls when that profit is taxed.
That is why a generic small business checklist does not fit. Contractors need to start with the WIP schedule, then layer equipment, payroll, and owner-level moves on top.
The 2026 Contractor Tax Checklist
1. Update your WIP schedule and project year-end profit
Refresh estimated costs to complete on every open job. Your projected taxable income is only as good as those estimates, and every decision below depends on that number.
2. Confirm where you sit on the gross receipts test
For 2026, the test is average annual gross receipts of $32,000,000 or less over the prior 3 tax years. Remember that related businesses may be combined. Your position decides which accounting methods are available to you.
3. Review your long-term contract methods
Contractors under the test may use the small contractor exception for contracts expected to finish within 3 years (expanded from 2 years for contracts entered into in tax years beginning after July 4, 2025). Larger contractors generally must use percentage of completion. If a method change makes sense, Form 3115 is usually required.
4. Time equipment purchases around the placed-in-service rule
100% bonus depreciation is now permanent for qualified property acquired after January 19, 2025, new or used. The equipment must be placed in service, meaning delivered and ready for use, by December 31. A dozer sitting at the dealer on New Year's Eve does not count.
5. Choose between Section 179 and bonus depreciation
For 2026, Section 179 allows up to $2,560,000, with a dollar-for-dollar phase-out once qualifying purchases exceed $4,090,000. Section 179 cannot create a loss. Bonus depreciation can. The right mix depends on your income and your state rules.
6. Document heavy truck business use
Trucks and SUVs with a gross vehicle weight rating over 6,000 lbs avoid the luxury auto caps and can qualify for 100% bonus. SUVs face a $32,000 Section 179 cap. Business use must exceed 50%, and you need logs to prove it.
7. Test owner reasonable compensation
S corporation owners must take reasonable compensation through payroll before distributions. Review salaries before the final payroll run of the year, since changing them after December 31 is messy.
8. Fund retirement plans
For 2026, the 401(k) employee deferral limit is $24,500, with an $8,000 catch-up at age 50 and up, and $11,250 for ages 60 to 63. Total annual additions can reach $72,000. Some plan types have setup deadlines, so confirm yours now rather than at filing time.
9. Decide on a pass-through entity tax election
The SALT cap is $40,400 for 2026 and phases down by 30% of MAGI above $505,000 (never below $10,000). A state PTET election can still help owners whose state taxes exceed the cap. Payment timing matters, and rules vary by state.
10. Check your QBI position
The 20% qualified business income deduction is permanent. For 2026, the threshold is $403,500 for married filing jointly and $201,750 for other filers. Above that, W-2 wages and qualified property limit the deduction, so salary and equipment decisions interact with it.
11. Set up overtime tracking for 2026 W-2s
Employees may deduct qualified overtime premium pay, up to $12,500 ($25,000 married filing jointly), phased down above $150,000 of MAGI ($300,000 joint). Employers must report qualified overtime separately on 2026 W-2s. Field crew payroll needs to separate the premium portion now.
12. Clean up vendor files for 1099 season
The 1099-NEC and 1099-MISC threshold is $2,000 for payments made starting in 2026. Collect a W-9 from every sub before the first payment anyway. Chasing W-9s in January slows everything down.
13. Run your estimated tax safe harbor
Individuals can avoid underpayment penalties by paying 100% of last year's tax (110% if prior-year AGI exceeded $150,000) or 90% of this year's tax. The fourth quarter payment is due January 15.
14. Gather R&D and 179D support
If your team did design-build, MEP engineering, or prefabrication work, the R&D credit may apply. For 179D, projects that began construction on or before June 30, 2026 may still qualify, so collect start-of-construction records while they are easy to find.
Example: Putting Three Items Together
Say an S corporation electrical contractor projects $1,500,000 of taxable profit for 2026. Here is how three checklist items could change that number:
Places a $250,000 bucket truck (over 6,000 lbs, 100% business use) in service on December 15 and takes bonus depreciation: profit drops to $1,250,000.
Adds $50,000 of owner salary to bring compensation in line with the role: profit drops to $1,200,000 (the salary is taxable wages to the owner instead).
Makes a $30,000 employer retirement contribution for the owner: profit drops to $1,170,000.
That is $330,000 less pass-through income ($250,000 + $50,000 + $30,000). The actual tax effect depends on your rates, state, QBI position, and payroll taxes, which is exactly why you model it before acting.
How This Connects to Your Bonding
Your surety reads your reviewed or audited financial statements, not your tax return. Some year-end moves cut taxes without touching those statements. Others, like buying equipment with cash, reduce working capital, which is one of the first numbers an underwriter checks.
Before you write a big check in December, ask two questions. What does this do to my tax bill? What does this do to working capital and equity on my year-end statement? A good plan answers both.
Frequently Asked Questions
When should contractors start year-end tax planning?
October is ideal. Your WIP numbers are reliable enough to project the year, and you still have time to buy and place equipment in service, adjust payroll, and fund plans before December 31.
Does equipment have to be paid for by December 31 to deduct it?
The key test is placed in service, meaning the equipment is delivered and ready for its intended use by year end. Financing does not prevent the deduction, but a purchase order alone does not qualify.
Can I change my accounting method at year end?
Some method changes are possible, and many are automatic changes filed on Form 3115. Timing and eligibility depend on your gross receipts and contract mix, so review this before the year closes.
Talk to a Contractor Tax Specialist
Payless Taxes works with bonded commercial contractors from $5M to $50M in revenue nationwide. We combine tax planning and tax preparation, so your year-end moves and your return are built together. Book a 30-minute call to walk through this checklist with your numbers.
This article is general information, not tax or legal advice. Tax rules change and depend on your specific facts. Talk with a qualified tax professional before acting.
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