Compare taxes across all 50 states, model retirement scenarios, run what-if analyses, and get personalized recommendations. No account required.
Tax Analysis
Federal, state, and local taxes calculated together. See your effective rate, take-home pay, and how progressive brackets apply to your income.
Side-by-side effective rates, take-home pay, and marginal brackets across all 50 states and DC.
NYC, Yonkers, Philadelphia, Portland, San Francisco, Denver, and more.
Interactive charts showing how effective rates change across income levels.
Compare current brackets against previous years to see how rates have shifted.
Planning
Run scenarios on relocations, retirement timelines, filing strategies, and more. Every calculation updates instantly with your profile data.
Project savings across conservative, baseline, and aggressive scenarios with Social Security estimates.
Marriage penalty, best/worst states, filing jointly vs. separately, Roth vs. Traditional, and the $1,000 raise.
Estimate taxes on investment gains across short-term and long-term holding periods.
Compare loan options and understand the after-tax cost of borrowing.
Research
Explore state-specific programs, global tax rates, fixed income yields, and a knowledge base — all without leaving the app.
17 states with deduction-eligible 529 plans, plus education credits and other state-specific benefits.
Interactive globe with tax data for international cities — useful for retirement abroad or relocation.
Compare after-tax yields on treasuries, munis, and corporate bonds for your bracket.
A local LLM that runs entirely in your browser via WebGPU. No data leaves your machine.
Searchable articles on tax concepts, filing strategies, and deduction eligibility.
No sign-up. No tracking. Your data stays in localStorage on your device.
Open Finance Maxxing