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How Plumbers, Electricians, and HVAC Techs Should Track Expenses

Published April 2026

For trades like plumbing, electrical, and HVAC, expense tracking is not just good accounting—it directly impacts profitability. Every tool, vehicle cost, and material purchase affects your bottom line. Without proper tracking, you may not know whether you are actually making money on jobs.

Create a System for Tools and Equipment

Tools under $2,500 are typically expensed as deductible costs. Tools over that threshold are depreciated. Keep a detailed list of all tools purchased with dates and amounts. Separately track major equipment (vans, lifts, compressors) for depreciation purposes. When tools are lost or stolen, you need documentation for both insurance claims and tax deductions.

Track Materials on a Job-by-Job Basis

Every material purchase should be tied to a specific job when possible. Record the supplier, date, amount, and what the materials were for. This helps you understand the true cost of materials for similar jobs and identify which suppliers offer the best value. Over time, you will notice patterns that inform your pricing.

Document Vehicle Expenses Carefully

You can deduct vehicle expenses either as actual costs (maintenance, fuel, insurance, depreciation) or using the standard mileage rate (68 cents per mile in 2026). Track all vehicle expenses and mileage by keeping a log or using mileage tracking app. Separately track business versus personal use to claim only the business percentage.

Monitor Fuel and Fleet Costs

Fuel is one of the largest ongoing expenses for trades. Keep fuel receipts and track gallons purchased or mileage to monitor fuel efficiency over time. If you have multiple vehicles, track each separately to identify which vehicle is most efficient. Unusual spikes may indicate maintenance issues.

Keep Records of Licensing and Certifications

License renewals, certification courses, and continuing education are deductible business expenses. Create a file for all licensing and training costs with dates. These expenses maintain your ability to operate in your trade and are fully deductible.

Account for Vehicle Depreciation

Service vehicles are capitalized and depreciated over time rather than expensed immediately. Track the purchase price, date, and intended useful life. You may be able to claim Section 179 depreciation to deduct more quickly. Keep purchase agreements and title documents for all vehicle purchases.

Document Subcontractor or Helper Costs

If you hire subcontractors or temporary help on jobs, track these payments separately. You need to issue 1099s to subcontractors at year end, so keep detailed records of who you paid, how much, and when. Employee wages and payroll taxes follow different rules.

Create Monthly Expense Summaries

At the end of each month, review all expenses by category and compare against previous months. Large variances may indicate problems with pricing, efficiency, or waste. This monthly review helps you make real-time decisions about job pricing and cost management.

The trades are high-expense businesses, but those expenses are deductible. By tracking carefully, you ensure you capture every deduction and understand your true profitability by job type.