Avoid penalties
The IRS charges underpayment penalties if you don't pay enough tax throughout the year. Quarterly estimates prevent this.
Tax Calculators
for Freelancers
Calculate your self-employment tax, plan quarterly payments, and understand sales tax obligations. Know exactly what you owe before the deadline.
Self-Employment Tax Estimator
Calculate SE tax, federal income tax, and total tax burden. See quarterly payment estimates.
Open calculator →Quarterly Tax Calculator
Estimate quarterly estimated tax payments with exact IRS deadlines. Avoid underpayment penalties.
Open calculator →Sales Tax Calculator
Calculate sales tax for all 50 US states plus DC. Includes state and average local rates.
Open calculator →Why tax planning matters
Unlike employees, freelancers don't have taxes withheld from each paycheck. You're responsible for estimating and paying your own taxes quarterly. Getting this wrong means penalties, interest, and a stressful tax season.
Know your SE tax
Self-employment tax is 15.3% — Social Security plus Medicare. As a freelancer, you pay both the employee and employer portions.
Plan your cash flow
Knowing your tax obligations in advance helps you set aside the right amount and avoid surprises at tax time.