Mileage Tracking for Contractors: Don't Leave Money on the Table

Contractors drive. A lot. Job sites, supply houses, client meetings, permit offices, equipment rentals, site visits. A typical contractor might drive 15,000-25,000 business miles a year.

At the 2024 IRS standard mileage rate of $0.67 per mile, 20,000 business miles is a $13,400 tax deduction. If you're in a 25% tax bracket, that's $3,350 in actual tax savings.

Most contractors claim a fraction of this because they don't have a reliable system to track miles.

What Makes a Mile "Business"?

The IRS definition of a deductible business mile: any drive made for a legitimate business purpose, not including commuting from your home to your first job site.

Deductible Business Miles for Contractors

• Driving between job sites on the same day
• Trips to lumber yards, hardware stores, supply houses
• Client and prospect visits
• Permit office runs
• Tool and equipment rental pick-ups
• Bank runs for business deposits
• Meeting with subs on a job site

Non-Deductible Miles

• Driving from home to your first job site of the day (commuting)
• Personal errands even if done on a work day
• Driving from your last job site home at the end of the day

Exception: if your home is your principal place of business (you have a legitimate home office), the drive from home to a client site may be deductible. Consult your tax advisor.

IRS Record-Keeping Requirements for Mileage

The IRS requires "contemporaneous" records — meaning you record the mileage when it happens, not reconstructed later from memory. Your records should include:

• Date of the trip
• Starting and ending location
• Business purpose
• Miles driven

A mileage app that automatically records this information satisfies the IRS requirement. Manual logs (notebooks, spreadsheets) work too, but require consistent discipline.

Standard Mileage vs. Actual Expenses

The IRS gives you two ways to deduct vehicle costs:

Standard Mileage Rate

Multiply your total business miles by the IRS rate ($0.67 in 2024). Simple, no need to track every gas fill-up or repair receipt. Most small contractors come out ahead with this method.

Actual Expense Method

Track all vehicle costs (gas, insurance, maintenance, depreciation, loan interest) and deduct the business-use percentage. More paperwork, sometimes a higher deduction — particularly if you have a new or expensive truck.

Note: once you choose the actual expense method for a vehicle, you generally can't switch to standard mileage for that vehicle.

For most contractors, standard mileage is simpler and sufficient. For contractors with expensive trucks and high actual costs, it's worth running the numbers both ways.

Why Manual Mileage Logs Fail

The IRS recommends keeping a mileage log. Very few contractors do it consistently. Here's why:

• You're on a job site at 7 AM and the last thing you're thinking about is writing down your odometer reading
• The notebook lives in the truck glove box and somehow never gets opened
• You forget twice, then feel like the log is already ruined, so you stop
• At year end, you can't prove the miles you claimed

The result: contractors either claim no mileage (leaving thousands in deductions unclaimed) or estimate (which the IRS doesn't accept if audited).

Automatic Mileage Tracking: The Right Solution

Automatic mileage tracking uses your phone's GPS to detect when you're driving and logs the trip in the background. You review trips later and classify them as business or personal with a tap.

The advantages over manual logging:

• No action required while driving — it just works
• Captures every trip, even the ones you'd forget to log
• Generates IRS-compliant reports automatically
• Takes 30 seconds to review a full day's drives

Hardhat Ledger includes automatic mileage tracking alongside job costing, receipt scanning, and invoicing — so your entire contractor bookkeeping workflow lives in one app.

Linking Mileage to Jobs

Beyond the tax deduction, mileage tracking per job gives you accurate job cost data. If you drive 200 miles back and forth to the Johnson job site over 3 weeks, that's $134 in vehicle cost — a real job expense that affects your margin.

When you link mileage to jobs in Hardhat Ledger, those costs flow automatically into the job's P&L. Your job cost reports get more accurate, your bids get better, and your margins are real — not inflated by ignoring travel costs.