The IRS raised the optional business mileage rate from 72.5 cents to 76 cents per mile effective July 1, 2026. This complete guide explains the split-year calculation, qualifying business trips, accountable-plan reimbursements, recordkeeping, standard mileage versus actual expenses, common mistakes, and downloadable mileage-log templates.

2026 Tax Changes You Can't Ignore: How OBBBA Impacts S-Corp Owners, Side Hustlers, and High-Earners