Quarterly Tax Calculator

Self-employed individuals, freelancers, and anyone who expects to owe $1,000+ in taxes and doesn't have sufficient withholding from wages.

You can avoid underpayment penalties by paying at least 100% of last year's tax liability (110% if AGI > $150K) or 90% of current year's tax.

Yes, completely free with no sign-up required. All calculations run in your browser.

Yes, all 50 US states are included with current state income tax rates and brackets.

The Quarterly Tax Calculator is an online tool that lets you calculate quarterly estimated tax payments with federal + state taxes, safe harbor rules, and payment deadlines for all 50 us states. It is part of NexTool's collection of free tools designed to help you work faster and more efficiently.

Using the Quarterly Tax Calculator is simple: visit the tool page, enter your data or input into the provided fields, and get instant results. Follow the controls on the page. Some functions require sign-in or a paid plan; see Pricing for limits.

The Quarterly Tax Calculator returns results based on the inputs and the tool methodology. Check assumptions, units and source dates. Treat projections as estimates. For critical decisions, always consult a qualified professional.

Local calculations run in your browser. AI features, accounts, saved reports and external data requests use server services. Check the tool description and privacy policy for the relevant processing and storage.