Calculate Your Estimated Tax
Payments in Minutes
Instant Estimate. Zero Guesswork.
Stay Ahead of Your Quarterly Taxes
If you’re required to pay estimated taxes, missing a payment can mean penalties, even if you pay your taxes in full later. HarborTax helps you stay on track by showing you how much to pay each quarter so there are no surprises.
Whether you’re self-employed full time, earning 1099 income, or juggling a W-2 job with a side business, HarborTax takes the guesswork out of estimated taxes.
Why HarborTax?
HarborTax works whether your income is steady, seasonal, or all over the place. It’s designed for freelancers, contractors, business owners, and anyone with income that doesn’t have taxes automatically withheld.
We calculate your safe harbor payments based on your income, filing status, and prior-year taxes, so you know what’s needed to avoid underpayment penalties.
- Quarterly tax planning checklists
- Retirement contribution calculators
- 2026 Tax deduction guides
- Expense tracking sheets
How It Works
Enter your info
Add your income details, filing status, and last year’s tax information.
Get your results instantly
We calculate your safe harbor amount and estimated quarterly payments right away.
Download your report
Save your results and use them as a guide when making quarterly payments.
No account required. No waiting. No sales call!
Built by Tax Professionals
HarborTax was created by tax professionals who work with self-employed individuals and business owners every day. We built this tool to make estimated taxes easier to understand and easier to manage, without unnecessary complexity.
Our goal is simple: help you pay the right amount, on time, with confidence.
Ready to Calculate?
It takes less than two minutes to see what you should be paying in estimated taxes and when.
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