The Tax Landscape for Contractors in 2026
The tax environment for construction companies has shifted meaningfully in 2026. The One Big Beautiful Bill Act (OBBBA), signed into law in mid-2025, restored several provisions that had been phasing out or expiring, while also introducing new rules that affect how contractors recognize income on long-term contracts. If your tax planning still relies on pre-2025 assumptions, you are almost certainly overpaying.
These seven strategies are specifically calibrated for contractors in the $1M to $15M revenue range. We will use a $4M revenue general contractor as our running example: the company generates $4M in revenue, has $3.4M in total costs (85% cost ratio), and produces $600,000 in pre-tax profit. The owner takes a salary of $180,000 and expects to distribute the remaining profit. Here is how to reduce the tax bill.
Strategy 1: S-Corp Election and Reasonable Compensation
If you are operating as a sole proprietorship or single-member LLC taxed as a disregarded entity, every dollar of profit is subject to self-employment tax at 15.3% (12.4% Social Security up to the $176,100 wage base in 2026 plus 2.9% Medicare on all earnings, plus the 0.9% Additional Medicare Tax on earnings above $200,000).
By electing S-corp status (filing Form 2553), the company pays you a reasonable salary, and the remaining profit passes through as a distribution that is not subject to self-employment tax. The key word is "reasonable." The IRS has successfully challenged S-corp owners who pay themselves unreasonably low salaries to avoid payroll taxes.
For our $4M contractor, a reasonable salary for an owner who functions as the company's president, lead estimator, and primary project manager is in the range of $150,000 to $200,000. At $180,000 in salary, the owner pays FICA on $180,000 ($13,770 employer share plus $13,770 employee share equals $27,540 total). The remaining $420,000 in distributions avoids self-employment tax entirely.
If this same owner operated as a sole proprietor, self-employment tax on $600,000 would be approximately $42,000 (accounting for the Social Security wage base cap and the Additional Medicare Tax). The S-corp saves roughly $25,000 to $40,000 per year depending on the exact salary level and whether state taxes create additional savings.
The compliance cost is modest: an S-corp requires payroll processing, a separate tax return (Form 1120-S), and K-1 preparation for the owner. Most payroll services handle this for $100 to $200 per month.
Strategy 2: 100% Bonus Depreciation (Restored Under OBBBA)
Bonus depreciation had been phasing down from 100% in 2022 to 80% in 2023, 60% in 2024, 40% in 2025, and was scheduled to reach 0% by 2027. The OBBBA restored 100% first-year bonus depreciation for qualified property placed in service after the date of enactment in 2025 and through the end of 2029.
For contractors, this means that when you purchase equipment, vehicles (with certain rules), and qualified improvement property, you can deduct the entire cost in the year the asset is placed in service rather than depreciating it over 5, 7, or 15 years.
Our $4M contractor buys a $95,000 mini excavator and a $55,000 work truck (GVWR over 6,000 lbs) in 2026. Under 100% bonus depreciation, the company deducts the full $150,000 in 2026. At a combined federal and state marginal tax rate of 35%, that is a $52,500 tax reduction in the current year. Without bonus depreciation, the company would depreciate the excavator over 5 years and the truck over 5 years, generating only about $30,000 in first-year depreciation under MACRS.
This strategy is particularly powerful when combined with year-end tax planning. If you know in November that your company is going to have an unexpectedly profitable year, purchasing needed equipment before December 31 creates an immediate deduction. The equipment must be placed in service (not just ordered or paid for) before year-end.
Important note for bonding: While bonus depreciation reduces your tax liability, it also reduces your net income and retained earnings on your tax return. Your surety looks at your financial statements (which use book depreciation), not your tax return, but your bank may use tax returns for lending decisions. Discuss the bonding and lending implications with your CFO before taking large bonus depreciation deductions.
Strategy 3: Section 179 Expensing ($2.5M Limit)
Section 179 allows you to expense qualifying property in the year it is placed in service, similar to bonus depreciation but with different rules. For 2026, the Section 179 deduction limit is $2.5 million (adjusted for inflation under OBBBA), and the phase-out begins when total qualifying property placed in service exceeds $3.13 million.
The practical difference between Section 179 and bonus depreciation is that Section 179 gives you a choice. You can elect to expense some assets under Section 179 and depreciate others normally. Bonus depreciation is generally all-or-nothing for each asset class (though you can elect out of bonus depreciation). This flexibility matters for tax planning.
For our $4M contractor, Section 179 is most useful for targeted purchases where you want to control exactly how much deduction you take. If you need a $60,000 deduction to bring your taxable income to a target level, you can elect Section 179 on $60,000 of qualifying equipment and depreciate the rest normally.
Qualifying property for contractors includes construction equipment, vehicles (subject to listed property rules for vehicles under 6,000 lbs GVWR), office furniture and computers, and certain building improvements. Land and buildings themselves do not qualify, but qualified improvement property (interior improvements to nonresidential buildings) does qualify for Section 179.
Strategy 4: Completed Contract Method (Now Available Post-OBBBA)
This is one of the most significant changes for contractors under the OBBBA. For contracts entered into after July 4, 2025, the completed contract method (CCM) is available to contractors with average annual gross receipts of $40 million or less over the prior three tax years.
Under the completed contract method, you do not recognize any revenue or deduct any costs on a contract until the contract is complete. Compare this to the percentage-of-completion method (PCM), where you recognize revenue and costs proportionally as work progresses.
The tax deferral advantage is significant. Consider our $4M contractor who starts a $1.2M project in September 2026 and completes it in April 2027. Under PCM, if the job is 35% complete at December 31, 2026, the contractor recognizes $420,000 in revenue and approximately $357,000 in costs in 2026, generating $63,000 in taxable income on that job for 2026. Under CCM, the contractor recognizes zero income from that job in 2026 and reports the entire profit in 2027 when the job closes.
This is not tax elimination; it is tax deferral. But deferral has real value. If the contractor consistently has jobs spanning year-end, CCM can defer $50,000 to $150,000 in taxable income each year, and the time value of that deferral compounds over the life of the business.
The catch: CCM is only available for tax purposes. Your financial statements for your surety and bank must still use the percentage-of-completion method under GAAP. This means you will maintain two sets of income recognition: one for financial reporting (PCM) and one for your tax return (CCM). Your CPA must reconcile the two, and the difference creates a deferred tax asset or liability on your GAAP balance sheet. This is normal and expected, but it does add complexity.
Strategy 5: Income Timing Between POC and Completed Contract
Even if you do not fully adopt the completed contract method, there are income timing strategies available within the percentage-of-completion framework that can reduce your current-year tax liability.
Cost-to-complete estimates. Under POC, the percentage of completion is calculated as costs incurred to date divided by total estimated costs. If your project manager revises the total estimated cost upward (perhaps due to a scope change, material cost increase, or anticipated warranty work), the percentage of completion decreases, which reduces recognized revenue for the current year.
This is not about manipulating estimates. It is about making sure your estimates reflect reality. Many contractors underestimate their cost to complete because they have not accounted for punch list work, warranty reserves, mobilization and demobilization costs on the back end, or the final 5% of a job that always takes longer than expected. An honest, conservative estimate of total cost will naturally defer some income to future periods.
Timing of job starts and completions. If you have discretion over when to start a new contract, beginning a large project in Q4 rather than Q3 means fewer costs incurred (and therefore less revenue recognized) by year-end. Similarly, if a job is 95% complete in November, accelerating completion into December allows you to recognize the full profit in the current year if that is beneficial, or slowing the punch list into January defers the final profit to the next year.
For our $4M contractor, managing the timing of two or three year-end jobs can shift $30,000 to $80,000 in taxable income between years. Over a decade, this consistent deferral strategy has meaningful compounding value.
Strategy 6: Retirement Plans (Solo 401(k) and Defined Benefit)
Retirement plan contributions are the most overlooked tax strategy for profitable contractors. The amounts are substantial, the tax savings are immediate, and you are building personal wealth at the same time.
Solo 401(k) for owner-only or owner-and-spouse companies. If your S-corp has no employees other than the owner (and possibly the owner's spouse), a Solo 401(k) allows employee deferrals of up to $23,500 in 2026 (plus a $7,500 catch-up contribution if the owner is 50 or older), plus an employer contribution of up to 25% of W-2 compensation. For our contractor with $180,000 in salary, the employer contribution can be up to $45,000, for a total contribution of $68,500 ($76,000 with catch-up). At a 35% marginal rate, that is a $24,000 to $26,600 tax reduction.
If the company has employees, you can still establish a 401(k), but you must offer participation to eligible employees and potentially make matching or profit-sharing contributions. The cost of matching is deductible, so the net expense is reduced by your tax rate.
Defined benefit (pension) plan for high-income owners. If the Solo 401(k) is not enough, a defined benefit plan can shelter significantly more. The maximum annual benefit in 2026 is $280,000, and the annual contribution required to fund that benefit depends on the owner's age and years to retirement. For a 50-year-old owner planning to retire at 62, the annual contribution could be $150,000 to $200,000. For a 55-year-old, it could exceed $250,000.
You can stack a defined benefit plan on top of a 401(k). A 50-year-old contractor with $600,000 in profit could contribute $68,500 to the 401(k) and $180,000 to the defined benefit plan, sheltering $248,500 from current taxation. At a 35% combined rate, that is $86,975 in tax savings in a single year.
The defined benefit plan requires an actuary to calculate annual contributions and has annual filing requirements (Form 5500). Setup costs run $2,000 to $4,000, and annual administration costs are $1,500 to $3,000. For a contractor sheltering $150,000 or more per year, the return on this administrative cost is extraordinary.
Strategy 7: Vehicle and Equipment Deduction Planning
Construction companies buy, lease, and replace vehicles and equipment regularly. The tax treatment depends on the type of vehicle, its gross vehicle weight rating (GVWR), and how it is used.
Vehicles over 6,000 lbs GVWR (most pickup trucks, all dump trucks, all heavy equipment) are not subject to the luxury auto depreciation limits. Under Section 179, you can deduct the full purchase price up to the $2.5M annual limit. Under 100% bonus depreciation, you can deduct the full cost regardless of the Section 179 limit. For our contractor buying a $72,000 Ford F-350 (GVWR 11,500 lbs) for 100% business use, the entire $72,000 is deductible in 2026.
Vehicles under 6,000 lbs GVWR (sedans, small SUVs, most crossovers) are subject to luxury auto limits. For 2026, the first-year depreciation limit including bonus depreciation is approximately $20,400. If you buy a $45,000 sedan, you can only deduct $20,400 in year one, with the remaining $24,600 depreciated over subsequent years.
Leasing versus buying is often presented as a tax decision, but for contractors, it is primarily a cash flow and balance sheet decision. Lease payments are deductible as incurred, but you do not build equity in the asset and the total cost over the lease term typically exceeds the purchase price. If your bonding program requires a strong balance sheet (high net worth and working capital), owning equipment may be preferable even if leasing produces a slightly better tax result.
Year-end equipment purchases combine strategies 2, 3, and 7. In December 2026, our contractor reviews the year's projected taxable income and determines that an additional $100,000 deduction would bring the effective tax rate to the target level. The company purchases a $100,000 skid steer that it has been planning to buy anyway, places it in service before December 31, and takes a $100,000 Section 179 or bonus depreciation deduction. The tax savings at 35% is $35,000, effectively reducing the net cost of the equipment to $65,000.
Putting It All Together: The $4M Contractor Example
Let us total the potential savings for our example contractor with $4M in revenue and $600,000 in pre-tax profit.
S-corp election saves $25,000 to $40,000 in self-employment tax. Bonus depreciation and Section 179 on $150,000 in equipment purchases generates approximately $52,500 in tax savings (or more precisely, defers $52,500 in taxes to future years when the depreciation would have been taken). Completed contract method defers $50,000 to $100,000 in taxable income, saving $17,500 to $35,000 in current-year taxes. Retirement plan contributions of $68,500 (Solo 401(k)) to $248,500 (with defined benefit) save $24,000 to $87,000. Vehicle deduction planning adds another $10,000 to $25,000 in timing benefits.
The total ranges from roughly $80,000 to $190,000 in annual tax reduction or deferral. Even the conservative end of that range represents a meaningful improvement in after-tax cash flow.
None of these strategies are exotic or aggressive. Every one of them is explicitly provided for in the Internal Revenue Code, and all are widely used by well-advised contractors. The difference between contractors who use them and those who do not is usually whether they have a tax advisor who understands construction, not whether they qualify.
Implementation Timeline
If you are not currently using these strategies, here is the order of implementation. First quarter: Evaluate S-corp election (must file Form 2553 within 75 days of the start of the tax year for it to be effective in the current year). Second quarter: Establish a retirement plan (Solo 401(k) can be established any time before December 31; defined benefit plans should be established by September 30 to allow time for actuarial calculations). Third quarter: Review your accounting method with your CPA and evaluate completed contract method adoption (requires Form 3115 filed with your tax return). Fourth quarter: Execute year-end equipment purchases and review cost-to-complete estimates on active jobs for income timing.
Tax planning is not a December activity. The most impactful strategies require decisions in the first half of the year. If you wait until November to start planning, you have already missed the S-corp election window and the optimal retirement plan setup timeline.