Underwrite a rental before you buy it. Compare long-term and short-term rental strategies side by side: cash flow, cash-on-cash return, cap rate, IRR, tax effects and a 10-year outlook. You can compare several deals at once.
Free, private calculators for big money decisions.
Napkin math gets you started. These tools take you further: every assumption is editable, the math is explained, and everything runs in your browser.
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- Every assumption editable
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See when you could retire and what it takes to get there. It models 401(k), Roth and taxable savings separately, uses a safe withdrawal rate that adjusts to how long retirement lasts, and stress-tests a bad first decade, all in today's dollars.
Shows its working
Every assumption is visible and editable, and each tool explains its math.
How the tools work →Goes beyond napkin math
Stress tests, tax effects and timing are built in, because they change the answer.
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