1099 Tax Calculator

1099 federal tax planning guide

This calculator combines self-employment tax and federal income tax so a contractor can estimate total federal liability, quarterly payments and a monthly reserve target.

Worked example

With $65,000 gross 1099 income and $8,000 business expenses, net business profit is $57,000. The tool estimates self-employment tax on 92.35% of profit, subtracts the deductible half of SE tax for income-tax purposes, applies the 2026 standard deduction and then calculates federal income tax by bracket.

Effective vs marginal rate

The effective rate divides total estimated federal tax by net business profit. The marginal rate is the federal income tax rate on the next dollar of taxable income.