TabSalary

Side-Hustle Tax Estimator

Estimate how much freelance or gig income to set aside after an eligible business-mileage deduction.

Estimated Tax Reserve

Suggested Amount to Set Asidefor this income estimate
Gross daily earnings
Mileage standard deduction
Net taxable income
Effective tax rate applied
Estimated tax reserve
Estimated tax effect of mileage
Mileage deduction shields income0% shielded

This is a planning estimate, not a tax return. Check current rules and consult a qualified tax professional for advice about your situation.

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TabSalary calculator guide

Estimate a side-hustle tax set-aside

Independent workers usually do not have an employer withholding income and self-employment taxes from each payment. This planning tool applies a selected effective rate after a mileage deduction to suggest how much cash to reserve. It is intentionally simpler than a tax return.

Written by the TabSalary editorial team · Last reviewed July 21, 2026

How the calculation works

Estimated reserve = max(0, gross earnings − business miles × $0.76) × selected effective rate

  1. Enter gross business income received or earned for the period you are planning.
  2. Enter documented business miles driven on or after July 1, 2026; the tool uses the 76¢ IRS business rate effective for that period.
  3. Choose a rough effective tax rate that reflects income tax plus self-employment tax exposure.
  4. Move the estimated reserve to a separate savings account and reconcile it against quarterly estimates.

Worked example

For $150 of gross earnings and 40 qualifying business miles after June 30, 2026, the mileage estimate is $30.40. The remaining $119.60 multiplied by a 25% planning rate suggests reserving $29.90. Actual deductible mileage and tax depend on eligibility, records, total annual income, filing status, state law, and other expenses.

What this estimate does not include

  • This is not a tax return and does not calculate brackets, credits, quarterly safe-harbor rules, state taxes, or the deductible portion of self-employment tax.
  • The 76¢ rate applies to eligible business mileage from July 1 through December 31, 2026; earlier 2026 mileage uses 72.5¢.
  • Commuting is generally not deductible business mileage. Keep contemporaneous records and consult a qualified tax professional for your circumstances.

Use the result as a planning estimate, not as personalized financial, tax, legal, or investment advice.

Sources and further reading

Help & answers

Tax reserve questions

Common questions about setting aside money for freelance and gig income taxes.

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Each tool is free, runs in your browser, and explains the assumptions behind the result.

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