Mileage Log & Quarterly Tax Tracker Browser App for Self Employed and Gig Workers

Quarterly taxes sneak up on you when you work for yourself. This app keeps your business miles, income and expenses in one place and shows you what to set aside before each due date. It's built for freelancers, gig workers, delivery and rideshare drivers, and side hustlers.

Digital browser app, not a printable. Works on any device with a web browser, no app store needed.

WHAT IT DOES

• Mileage log: date, purpose, start, destination, miles, and a round trip option
• Mileage deduction figured automatically from the trip date at the IRS rate (2026: 72.5 cents through June 30, 76 cents from July 1). You can change it
• Income and expense log with common business categories
• Net profit, self-employment tax and an income tax planning estimate
• All four quarterly due dates, with a suggested amount for the next one
• Record the payments you make. The app spreads what's left across the remaining dates
• Prior year safe harbor check using last year's tax
• Download your mileage log or income and expenses as a CSV, or print your mileage log

WHY IT HELPS

• Large text, big buttons, clear labels
• Works offline. No account, no subscription, no install
• Your entries stay on your device. Nothing is uploaded
• Save a backup file any time and restore it later

WHAT YOU GET

One ZIP with the app (one HTML file that opens in Chrome, Edge, Safari or Firefox) and a 3-page how-to guide (PDF).

HOW TO USE IT

1. Download and unzip the file.
2. Open the app file in your web browser on your phone, tablet or computer.
3. Log trips, income and expenses. Set your tax rates in the Taxes tab.
4. Check the Overview for your next suggested payment.

GOOD TO KNOW

• Digital download, nothing ships.
• Use the same browser on the same device so your entries stay put. Save backups.
• All amounts are planning estimates. Check the current mileage rate and due dates on IRS.gov.
• For personal use. Please don't share or resell the file.

This is an organizational tool, not tax, legal, or financial advice.