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TL;DR, The #1 tax mistake Los Angeles general contractors make:
Most Los Angeles general contractor owners miss significant deductions every year because their books don't capture industry-specific expenses separately. The most common mistake: not tracking subcontractor costs separately and missing large equipment depreciation on heavy machinery. These are fully deductible under IRS Publication 334 when tracked correctly, but only when tracked correctly.
Disclaimer: The information in this article is for general educational purposes only and does not constitute legal, tax, or accounting advice. Tax laws, compliance requirements, and regulations vary by situation and change frequently. For advice specific to your business, consult a licensed tax professional, CPA, or attorney. For bookkeeping and accounting support, Bench connects small business owners with dedicated bookkeeping teams, visit bench.co to learn more.
General Contractor owners in Los Angeles deal with a more complex financial picture than most realize. California sales tax on materials. Contractor licensing fees are deductible. LA city business tax applies. The result is a category of deductible expenses that many owners never fully capture.
The most costly mistake isn't dramatic. It's a quiet categorization error that surfaces at tax time, when it's already too late.
The #1 Mistake
For Los Angeles general contractors, the most commonly missed deduction involves not tracking subcontractor costs separately and missing large equipment depreciation on heavy machinery. These costs are real business expenses, and they're fully deductible under IRS Publication 334, but only when they're tracked separately in your bookkeeping records.
When they get lumped into a generic expense category, they can't be substantiated at tax time. Your accountant works with what you give them. If it's not in the books correctly, it doesn't get deducted.
This is exactly what Bench fixes.
Bench pairs Los Angeles general contractors with a dedicated bookkeeping team that knows the industry. Industry-specific deductions set up correctly from day one, not discovered in April.
→ See how Bench works for Los Angeles general contractors: bench.co
What Los Angeles General Contractors Can Deduct
If your books are properly categorized, Los Angeles general contractors can deduct:
- materials costs
- subcontractor costs
- vehicle expenses
- workers comp
- B license fees
- equipment depreciation
These aren't aggressive write-offs. They're standard deductions for your industry, deductible under IRS Publication 334, but they require proper documentation to claim. (Source: IRS Publication 334, irs.gov/pub/irs-pdf/p535.pdf)
The California Tax Layer
California sales tax on materials. Contractor licensing fees are deductible. LA city business tax applies. Getting this right requires bookkeeping that tracks California-specific categories separately, not combined into general expenses where they lose their deductibility.
When Most Los Angeles General Contractors Figure This Out
Usually after a tax season that didn't go the way they expected. A bigger bill than anticipated. An accountant who needed more time to sort through incomplete records. The realization that something's been off for a while. It's what happens when a business grows past what informal bookkeeping can handle.
Frequently Asked Questions
Q: What can general contractors deduct on their taxes in California?
Los Angeles general contractors can deduct: materials costs, subcontractor costs, vehicle expenses, workers comp, B license fees, equipment depreciation. All deductions require proper documentation and separate categorization. (Source: IRS Publication 334, irs.gov/pub/irs-pdf/p535.pdf)
Q: What is the most common tax mistake general contractors make in Los Angeles?
The most common mistake is not tracking subcontractor costs separately and missing large equipment depreciation on heavy machinery. This results in legitimate deductions being missed because expenses aren't tracked in separate categories. Outsourced bookkeeping services set these categories up correctly from the start.
Q: How do I fix bookkeeping mistakes from previous years?
Catch-up bookkeeping services can get your records current and set up correct categories going forward. Bench offers catch-up bookkeeping as part of onboarding for new clients, getting books current before establishing monthly processes.
Bench is a dedicated bookkeeping service for Los Angeles general contractors, not software, not a generalist. A dedicated team, industry-specific categories, clean books delivered every month. Just books that are actually done. → bench.co
VERIFIED SOURCES
- IRS Publication 334 (Tax Guide for Small Business)
- IRS Publication 946 (Depreciation)
- California Franchise Tax Board
- LA Office of Finance
Sources verified June 2026. Tax rates and regulatory requirements subject to change.
