What is business-use percentage?

It is the share of total miles you treat as business. Many actual-expense calculations apply this percentage to vehicle costs.

Is commuting the same as business mileage?

Usually not. Travel between home and a regular workplace is often commuting. Rules can be fact-specific—ask a qualified professional.

Do the category miles need to add up?

Yes for a clean chart. If business + commute + personal does not match total miles, the tool warns you to reconcile the inputs.

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Business vs. Personal Mileage Calculator

Calculate business-use percentage from total, business, personal, and commuting miles. See a clear breakdown that distinguishes ordinary commuting from business driving.

Business vs personal mileage breakdown

Total miles drivenBusiness milesClient visits, job sites, temporary workplaces—confirm with a tax proCommuting milesOften home ↔ regular workplace; usually treated differently from business milesOther personal miles

Business-use percentage: 60.0%
Business miles: 9,000 mi
Non-business miles: 6,000 mi

Visual mix

Business
Commute
Personal

Categorization matters as much as the mile count.

Tag drives as business or personal in MileLedger while the purpose is still obvious.

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How this tool works

Enter total miles and how you categorize business, commuting, and other personal miles. The tool computes business-use percentage and flags inconsistent totals.

Calculation methodology

Business-use % = business miles ÷ total miles. Commuting is shown separately because it is often treated differently from deductible business miles—confirm with a tax professional.

Worked example

15,000 total miles with 9,000 business, 4,000 commute, and 2,000 personal → 60% business-use, with commuting highlighted separately from business miles.

Frequently asked questions

What is business-use percentage?: It is the share of total miles you treat as business. Many actual-expense calculations apply this percentage to vehicle costs.
Is commuting the same as business mileage?: Usually not. Travel between home and a regular workplace is often commuting. Rules can be fact-specific—ask a qualified professional.
Do the category miles need to add up?: Yes for a clean chart. If business + commute + personal does not match total miles, the tool warns you to reconcile the inputs.

Authoritative sources

IRS standard mileage rates

Estimates only. MileLedger does not provide tax, legal, or accounting advice. Confirm rates, eligibility, and filing positions with a qualified professional.