How to Track Mileage and Expenses for Your Service Business
Most service business owners leave thousands of dollars on the table every year because they don’t track their expenses. You drive to 6-10 client locations a day, fill up twice a week, buy equipment and supplies every month — and come tax time, you’re guessing at the numbers or just not claiming what you’re owed.
Here’s what to track, why it matters, and how to make it painless.
Why tracking matters
Every mile you drive between jobs and every dollar you spend on equipment is potentially deductible. The IRS lets you deduct business mileage at the standard mileage rate (check with your accountant for the current year’s rate — it changes annually). For a service business owner driving 80-120 miles a day across client locations, that adds up to real money.
Beyond mileage, you can deduct fuel, equipment purchases and repairs, supplies and materials, trailer costs, insurance, and phone expenses if you use your phone for scheduling and invoicing. But you can only deduct what you can document. No records, no deduction.
What to track
Mileage between jobs. Every drive from one client location to the next counts as business mileage. So does the drive from your home or shop to the first job and from the last job back. Keep a log of date, starting location, ending location, and miles driven.
Fuel and vehicle costs. If you use the actual expense method instead of the standard mileage rate, track every fill-up, oil change, tire, and repair. Keep receipts.
Equipment. Pressure washers, cleaning machines, power tools, trailers, specialized gear — these are business assets. Track what you paid and when you bought them. Larger purchases may need to be depreciated over time rather than deducted in one year.
Supplies and materials. Cleaning products, replacement parts, disposable materials, safety gear — anything you use on the job.
Software and subscriptions. Your scheduling app, invoicing tools, accounting software, and any other business subscriptions.
Common mistakes
Not tracking consistently. Writing down your mileage “when you remember” means you’re missing half your deductions. You need a system that captures every trip automatically or makes it trivially easy to log.
Mixing personal and business expenses. Using one vehicle for client jobs and weekend errands is fine, but you need to separate the business miles from the personal ones. If you can’t show which miles were for work, an auditor won’t accept any of them.
Shoebox accounting. A pile of receipts in a drawer is not a system. By the time you sort through them in April, half are faded and the rest are missing context. Digitize receipts as you get them.
Ignoring small purchases. That $12 pack of supplies and the $8 bottle of cleaner add up over a season. Track everything.
How to make it easy
The single best thing you can do is stop relying on paper and memory. Use an app that’s already part of your daily workflow.
If you’re using Fescue to schedule jobs and invoice clients, you’re already halfway there. Fescue’s route planning maps out your day’s jobs and optimizes your driving order — which means you’re not just saving fuel, you’re also building a documented record of where you drove and when. That route history is exactly the kind of mileage documentation that holds up at tax time.
Beyond route records, a few habits make the difference:
- Snap a photo of every receipt the day you get it. Most accounting apps and even your phone’s camera can handle this.
- Use a dedicated business bank account or credit card. This separates business and personal expenses automatically and gives you a clean transaction history.
- Review weekly, not yearly. Spend 10 minutes every Sunday categorizing the week’s expenses while they’re fresh.
The bottom line
Tracking mileage and expenses isn’t exciting, but it’s the difference between paying more tax than you owe and keeping the money you earned. Start with a system that fits into how you already work, be consistent, and talk to an accountant about what you can deduct in your specific situation.
If you’re still managing your service business with texts and a paper calendar, Fescue can handle the scheduling, invoicing, and route planning — and give you better records in the process.