If you’re a business owner and mileage tracking fell apart somewhere between “I’ll remember later” and “tax season is here,” you’re not alone. Mileage is one of the most common deductions people miss—not because they don’t drive for business, but because they didn’t track it consistently.
The good news is this. All is not lost. There are still reasonable, compliant ways to reconstruct your mileage and avoid leaving money on the table.
Why Mileage Matters More Than You Think
For 2025, the standard mileage rate was 70 cents per mile. That means every mile you drove for business reduced your taxable income by $0.70.
That adds up fast.
Let’s say you drive 10 miles round-trip to Staples once a week to make copies or pick up supplies.
10 miles × 52 weeks = 520 miles
520 miles × $0.70 = $364 deduction
And that’s just one errand.
When mileage goes untracked, it’s not just paperwork you’re missing. It’s real money.
What Counts as Business Mileage
Business mileage includes travel that is ordinary and necessary for your business. Common examples include:
- Checking your PO Box
- Creating and posting flyers
- Meeting clients or prospects
- Checking on posted flyers or bulletin boards
- Attending networking events
- Running office supply errands
- Driving to a conference or training
If the primary purpose of the trip was business-related, it may qualify.
Commuting from home to a regular W-2 job does not count. But if your home qualifies as your principal place of business, many local trips that support your business activities may be deductible.
What to Do If You Didn’t Track Mileage
If you didn’t use a mileage app or logbook, you can still reconstruct your mileage—as long as you do it honestly and reasonably.
Start by going back through:
- Your planner or calendar
- Appointment schedules
- Email confirmations
- Invoices or receipts tied to in-person activity
Look at where you went and what you did for your business. Next, calculate the mileage using a mapping tool, such as Google Maps to calculate round-trip distances, in the most direct route.
The IRS allows reconstructed mileage when it’s based on credible records and a consistent method. What they don’t allow is guessing or inflating numbers to “make it worth it.”
What the IRS Actually Cares About
The IRS isn’t expecting perfection. They are looking for:
- A clear business purpose
- A reasonable method for calculating mileage
- Consistency from year to year
- Documentation that supports your estimates
If your numbers align with your business activity, they are far more defensible than simply claiming zero because you didn’t track perfectly.
How to Make This Easier Going Forward
Once you’ve reconstructed what you reasonably can, put a simple system in place so this doesn’t happen again.
That can be as basic as:
- A notes app on your phone
- A spreadsheet updated weekly
- A mileage tracking app that runs automatically
The key is consistency, not complexity.
Final Thoughts
Mileage deductions are one of the easiest ways to reduce your tax bill, and they’re also one of the easiest to overlook. If you didn’t track perfectly this year, don’t panic—and don’t ignore it either.
Take the time to reconstruct what you can, document your reasoning, and move forward with a system that works for you. Even small trips add up, and over the course of a year, that mileage can make a meaningful difference.
And if you’re ever unsure whether a trip counts, it’s usually better to document it now and sort it out later than to forget it entirely.
