Quarterly Tax Estimator

Estimate 2026 quarterly tax payments (Form 1040-ES) for freelancers and self-employed. Calculate federal income tax + self-employment tax with payment schedule and due dates.

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Income

Self-Employment Gross Income ($)

Business Expenses ($)

W-2 Income ($)

W-2 Federal Withholding (annual) ($)

Other Income ($)

Deductions & Status

Filing Status

Retirement Contributions ($)

Health Insurance Premiums ($)

Deduction Type

How Quarterly Estimated Taxes Work

If you expect to owe $1,000+ in taxes, you must make quarterly estimated payments.
Payments cover both federal income tax and self-employment tax.
Due dates: April 15, June 15, September 15, and January 15.
Underpayment may result in penalties from the IRS.

Safe Harbor Rules

Pay 100% of prior year tax liability (110% if AGI over $150K)
Or pay 90% of current year tax liability
Meeting either threshold avoids underpayment penalties
100% client-side calculation

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