Mileage Tracking 101: How to Claim Every Mile at Tax Time

If you're an independent driver or run a taxi service, your vehicle is your biggest business asset — and your biggest expense. Yet most drivers dramatically underreport their mileage at tax time, leaving hundreds (sometimes thousands) of dollars in deductions unclaimed.

The reason isn't laziness. It's that most mileage tracking systems are either too clunky to use consistently, or too easy to forget about mid-shift. This guide covers what you need to know, what qualifies, and how to build a system that actually sticks.

Why mileage tracking matters more than you think

In the US, the IRS standard mileage rate is 67 cents per mile for business use (2024 rate). That means for every 1,000 miles you can document as business-related, you reduce your taxable income by $670. For a driver doing 30,000 business miles a year, that's a $20,000+ deduction — and at a 25% tax rate, over $5,000 back in your pocket.

In the UK and Ireland, HMRC and Revenue have similar approved mileage allowances. The principle is the same: every documented business mile reduces your tax bill.

What counts as a deductible mile?

For independent drivers and taxi operators, almost every mile you drive while working qualifies. Specifically:

• Trips with a passenger — every mile you drive with a client in the vehicle
• Dead miles — driving to pick up a client, or repositioning to a better area
• Airport runs — including waiting time driving around terminals
• Pre-shift vehicle checks — if you drive to inspect or prepare your vehicle at a separate location
• Client-related errands — picking up supplies, getting a car wash for the business, etc.

What doesn't count: your commute from home to your first job of the day (if your home isn't a registered business location), and any personal trips made during working hours.

The problem with most mileage tracking

The classic method is a paper logbook or a spreadsheet. You write down the date, starting odometer, ending odometer, destination, and purpose after every trip. In theory, it's perfect. In practice, you forget to note the starting reading, the logbook stays in the glove box for three weeks, and by December you're reconstructing the year from memory — which the IRS won't accept.

Apps that require you to manually start and stop tracking every trip have the same problem. If you have to remember to do it, eventually you won't.

What good mileage records look like

Whether you use an app or paper, every entry needs five things to be IRS-compliant:

1. The date of the trip
2. The starting and ending location (or odometer readings)
3. The total miles driven
4. The business purpose (e.g. "client pickup — airport run")
5. The client or job it relates to (where applicable)

The more of this you can capture automatically at the point of the trip, the more complete and accurate your records will be by the time your accountant asks for them.

Building a system that sticks

The drivers who claim the most at tax time aren't necessarily the most organised — they've just built trip logging into their existing workflow. A few habits that help:

• Log the trip immediately when you drop off, not at the end of the shift. It takes 15 seconds while you're still parked.
• Attach the client to every trip. This makes your records far more useful than raw mileage figures — it shows the IRS a clear business purpose for every mile.
• Keep a route library. If you're doing the same airport run three times a week, saving that route means logging it is one tap, not typing addresses every time.
• Review weekly, not yearly. A quick five-minute check every Sunday catches missed entries before they're gone from memory.

The bottom line

Mileage is one of the largest deductions available to self-employed drivers, and it's one of the easiest to lose track of. A simple, consistent logging habit — ideally backed by a tool that keeps your routes and clients in one place — can make a material difference to your tax bill every single year.

The best time to start was the first day you went self-employed. The second best time is right now.