🧪 Tax Optimization Simulation

This simulation demonstrates the principles of tax optimization within a progressive marginal tax system. Adjust your gross income and three real pre-tax levers — retirement contributions, an HSA, and itemized deductions — and watch a 3D tax waterfall rebuild in real time, one colored tier per bracket, showing exactly how many dollars are taxed at each marginal rate. Live readouts track taxable income, total tax owed, effective rate, marginal rate, and the running dollar amount you save by sheltering income, illustrating why the same deduction is worth more to a high earner than a low one — and why minimizing tax is about managing which bracket your last dollar falls into, not just how much you earn.