Year-End Tax Planning for Contractors

Why Year-End Planning Matters

For most contractors, year-end tax planning isn't a priority until November or December. But by then, it's often too late to make meaningful changes. Year-end tax planning is a year-round discipline.

Smart contractors plan their tax strategy throughout the year — reviewing job profitability, WIP Schedules, and estimated tax payments. They use year-end to fine-tune and optimize, not to scramble.

Key Tax Strategies for Contractors

• Section 179 expensing: Deduct the full cost of qualifying equipment in the year it's placed in service — up to a limit.
• Bonus depreciation: An additional deduction for qualifying assets — currently 80% through 2026.
• Deferring revenue: If you're on the cash basis, you can delay billing to defer revenue to the next year.
• Accelerating expenses: Prepay expenses — like materials or insurance — to claim the deduction in the current year.
• Retirement contributions: Contributions to SEP IRAs, SIMPLE IRAs, or 401(k) plans reduce taxable income.
• Multi-state tax planning: Ensure you're apportioning income correctly among states.

The Importance of Estimated Tax Payments

Contractors are required to pay estimated taxes quarterly. Underpaying estimated taxes can result in penalties — even if you don't owe tax at year-end.

The key to estimated taxes: know your income early. If you're having a good year, increase your estimated payments. If you're having a slow year, reduce them. The IRS penalizes underpayment, not accuracy — so it's better to overpay and get a refund than underpay and pay penalties.

Multi-State Tax Planning at Year-End

If you work in multiple states, year-end is the time to review your state tax positions:

• Review your apportionment: Make sure your income is correctly apportioned among states.
• Check for nexus: Did you create nexus in any new state this year? If so, you may need to file.
• Review estimated payments: Ensure you've made estimated payments in every state where you owe tax.
• File non-resident returns: If you worked in a state but didn't file, correct it now.

Common Year-End Tax Mistakes

• Not meeting with your CPA early enough: By December, it's often too late to implement meaningful strategies.
• Ignoring estimated tax payments: Underpaying estimated taxes can result in penalties.
• Not reviewing your WIP Schedule: Your WIP Schedule affects your taxable income under the percentage-of-completion method.
• Forgetting about multi-state obligations: States have their own filing deadlines and rules.
• Not taking advantage of available deductions: Many contractors miss deductions they're entitled to.

How Year-End Tax Planning Affects Your Bonding

When a surety evaluates your bonding capacity, they look at your tax compliance. Tax liens, delinquent filings, and outstanding tax liabilities are all red flags. Year-end tax planning is an opportunity to clean up your tax record before your next bonding review.

Frequently Asked Questions

When should I start year-end tax planning?

Ideally, start in October. Review your financials and WIP Schedule, and meet with your CPA to discuss strategies.

What's the Section 179 deduction limit?

The limit changes annually. For 2026, the deduction limit is $1,220,000 (subject to phase-out). Check with your CPA for the current year.

Can I deduct my truck on my taxes?

Yes — if you use it for business. The deduction is based on actual expenses or standard mileage.

What if I don't file on time?

You'll face penalties and interest — and it can affect your bonding capacity. File on time, even if you can't pay.