Lower your 2026 taxes — while you still can.
See your estimated tax bill right now — and find out how much you could lower it before the year ends.
Most people only look at their taxes in April — when it's too late to reduce them.
Free for 2026 tax year·No credit card·All 50 states
Sound familiar?
Questions you're already asking.
Instead of finding out the answer in April, find out right now — while you can still do something about it.
Thinking of selling some stock?
See the tax hit before you sell — long-term vs. short-term, it matters more than you think.
Got a bonus or freelance income?
Know what extra income really costs you in taxes, not just the rate on paper.
Thinking about a big charitable donation?
Find out if it actually moves the needle — or if combining a few years of giving into one would save you more.
Planning a large IRA withdrawal?
See how it shifts your bracket — and whether there's a smarter amount to pull out.
Got a side job or 1099 income?
Self-employment taxes add up fast. See your full picture before year-end.
Thinking about moving money to a Roth account?
See exactly what a conversion costs you this year — and whether the long-term math works.
How it works
You don't need to be an accountant.
For most people, 5–6 numbers is all it takes to get a solid estimate of your tax liability. Enter them once, then play with the what-ifs — and see how each decision changes your bottom line instantly.
Enter your numbers
Start from last year's return. Wages, interest, deductions — the basics. Takes minutes, not hours.
Adjust the what-ifs
Change income, deductions, or contributions and see your tax bill update instantly. Save different versions and compare them side by side — 'what if I sell the stock vs. wait another year?'
Reduce your bill
Time your income, maximize deductions, and optimize contributions while you still can. Small moves now can mean a meaningfully smaller check in April.
For the detail-oriented
Some decisions are worth thousands of dollars.
A single dollar of extra income can cost you thousands in lost subsidies or higher Medicare premiums. TaxVant makes these cliff edges visible — before you accidentally step off one.
Roth Conversions
How much can you convert this year before crossing into the next bracket? See the exact crossover point and model the long-term tradeoff.
ACA Subsidy Cliffs
A few hundred dollars of extra income can wipe out thousands in health insurance subsidies. Map your cliff before it's too late to manage.
Medicare IRMAA
Your Medicare premiums jump at specific income thresholds. Know exactly where yours is — and whether a Roth conversion or IRA withdrawal pushes you over.
TaxVant Ranger
See your full tax picture across a range of incomes.
Want to know what happens to your taxes at $80K vs. $120K vs. $160K? TaxVant Ranger sweeps a range of values and charts every bracket edge, phase-out cliff, and subsidy threshold — all at once. It's the fastest way to find the optimal number.
Ranger charts can look wrong at first glance — a marginal tax rate that dips, or a sudden spike you weren't expecting. Hit Explain This and an AI walks you through exactly why the curve does what it does: which phase-out triggered, which credit phased in, and what it means for your decision. The math is always right — this makes sure you understand why.
Open-source accuracy
Calculations are powered by PolicyEngine's open-source tax model — the same one university researchers and government agencies rely on.
Calculations you can audit
Every formula is open source and inspectable. No black boxes — review our engine, modifications, and logic openly on GitHub .
All 50 states covered
Federal taxes plus all 50 state tax codes — every bracket, deduction, and credit modeled together, so your estimate reflects where you actually live.
Live examples
See real scenarios — no signup required.
These are actual TaxVant workspaces, shared publicly. Click any scenario to explore the interactive charts and numbers yourself.
Scenario Comparison
Side-by-side scenario comparison for a salaried household — No pre-tax contributions vs 401k contributions vs Head of Household filing status.
Long-Term Capital Gains
See why incurring long-term gains can produce a marginal tax rate that goes down as you sell more — a counterintuitive result of our complex tax code.
Roth Conversion Optimization
Find the exact conversion amount that stays within your bracket before crossing into the next tier — with the full tax impact charted.
ACA Subsidy Cliff
Watch your ACA subsidy evaporate as self-employment income crosses the threshold. The exact dollar amount that costs you thousands.
Medicare IRMAA Thresholds
Map every IRMAA tier and see how a Roth conversion pushes you into a higher Medicare premium bracket. We model IRMAA as a tax so you can compare it directly to other tax decisions.