The #1 Reason Construction Companies Get Surprised by Taxes Every Year
- Mark Toussaint
- 3 days ago
- 2 min read
Updated: 2 days ago
It’s not the tax return.
It’s what’s happening in the books all year.
Most construction companies aren’t missing tax “strategies”—they’re missing the way their numbers are tracked month to month. And that shows up as a surprise when the return gets filed.
Here are the three areas where that usually happens:
1. Misclassified Costs (Where Construction Taxes Start Getting Overpaid)
One of the biggest issues is how costs are categorized during the year.
Repairs vs. improvements. Materials vs. supplies. Expenses vs. capitalized costs.
Recent IRS rules under Section 263 make these distinctions more important—not less. The difference between expensing and capitalizing isn’t just technical—it directly impacts taxable income.
Without the right classification, those costs may be depreciated over years. With proper treatment under Section 179 and/or bonus depreciation, they could be 100% deductible immediately.
That’s the difference between writing off 5%… or 100% in the current year for the same cost.
If this is being cleaned up once a year at tax time, the opportunity has likely already passed.
Sources Referenced: Treas. Reg. §§ 1.263(a), 1.162-3, 1.179-1, 1.168(k)-2; Rev. Proc. 2015-14; Rev. Proc. 2015-20
2. Missed R&D Credit Opportunities (Yes—In Construction)
Many contractors assume R&D credits don’t apply to them.
But design-build work, custom fabrication, and problem-solving in the field can qualify—especially when you’re developing solutions, modifying plans, or improving processes.
The issue isn’t eligibility — It’s documentation.
Without job-level tracking of labor, subcontractors, and materials tied to those activities, the opportunity disappears—even if the work clearly qualifies.
This isn’t just a deduction—it’s a credit.
That means it directly reduces your tax bill, dollar-for-dollar.
In some cases, that can be up to roughly 10% of qualifying costs—for example, $200,000 of qualifying activity could generate around a $20,000 tax savings.
Sources Referenced: Treas. Reg. § 1.41; IRC § 174A; https://www.irs.gov/businesses/research-credit
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3. Energy Efficiency Incentives (IRC §179D) Are Project-Based
For certain commercial and government-related projects, energy-efficient building deductions can be significant.
But they are tied to specific projects—not your business as a whole.
If those jobs aren’t identified and tracked during the year, reconstructing them later is difficult and often incomplete.
On qualifying projects, this can add up quickly.
For example, a 10,000 square foot job could generate an additional $25,000–$50,000 deduction*
*Depending on the level of energy efficiency achieved.
Sources Referenced: IRC § 179D Notice 2006-52; Notice 2008-40; Notice 2012-26; Announcement 2023-1; https://www.irs.gov/credits-deductions/energy-efficient-commercial-buildings-deduction; https://www.irs.gov/pub/irs-pdf/p5832.pdf; https://179d-portal.energy.gov/
What each of these have in common
None of these are “tax-time” strategies.
They all depend on how your numbers are tracked — by job, by cost type, and by activity.
That’s where the difference is made.
Not when the tax return is due — But in how the books are built through out the year.
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