The biggest challenge for field service companies is that expenses happen in the field, not at a desk. Your techs are at supply houses, gas stations, and hardware stores throughout the day. Without a simple system they’ll actually follow, receipts pile up in truck consoles and expenses go unrecorded.

Start with one rule: every business purchase goes on a business card or comes out of a business account. No personal cards, no cash unless absolutely necessary. This gives you a transaction record even when the receipt disappears. If you have multiple crews or technicians making purchases, issue company cards with spending limits. Most business credit card providers let you set per-transaction and monthly caps for each cardholder.

Capture receipts the same day. Phone photos work, but a receipt scanning app like Dext or Hubdoc is better because it extracts the vendor, amount, and date automatically and can push the data into QuickBooks. The longer a receipt sits in someone’s pocket, the less likely it gets recorded. Make it part of the daily routine. When the crew wraps up for the day, snap photos of every receipt before heading home.

Code every expense to the job it belongs to. Materials for the Garcia irrigation install should be tagged to that project, not lumped into a generic “materials” category. This is what lets you see whether a job actually made money or whether material costs ate into your margin. Without job-level tracking, you’re guessing at profitability. Your accounting software needs to be set up for this, and it takes discipline from the people making purchases to note which job the expense is for.

Track vehicle costs consistently. Fuel, oil changes, tires, and repairs are significant line items for home and property service businesses. Use a mileage tracking app like MileIQ if you’re claiming the standard mileage deduction, or track actual vehicle expenses if that method works better for your situation. Either way, do it as you go. Reconstructing a year of driving from memory is not a realistic plan.

Reconcile weekly, not monthly. When you wait a full month, you’ve forgotten what half the charges were for. Weekly reconciliation in QuickBooks takes 15 to 20 minutes and catches duplicate charges, miscoded expenses, and unauthorized purchases before they become bigger problems.

Set up categories in your accounting software that match how your business actually spends money. Generic charts of accounts don’t work well for field service companies. You want categories for materials, fuel, equipment maintenance, subcontractors, permits, and disposal fees if that applies to your trade. The more specific the categories, the more useful your financial reports become.

If tracking feels like it’s falling apart despite good intentions, the issue is usually that the system asks too much of the people in the field. Simplify wherever you can. Fewer steps between spending money and recording it means better data. Working with a small business accounting firm that understands field service operations can help you build a system your team will actually stick with, and catch the gaps that inevitably come with busy weeks.