Debt vs. Invest Calculator
LiveWatched 18d
What we measured
- Responding
- yes
- Watched
- 18 days
- Last checked
- 12d ago
We check every product on this page once a day and record whether it still answers.
A free, open-source calculator that tells you whether paying off debt or investing wins after taxes, using 2026 U.S. federal and state tax rules instead of a simple pre-tax rate comparison.
FreeNo sign-upOpen source
What to know▼
- How it works
- Applies 2026 federal brackets, NIIT, and state tax treatment to compare options like a HYSA, T-Bills, stocks, or IRAs against paying off a car or student loan, with shareable links.
- What's different
- Compares after-tax returns rather than the pre-tax rate comparison most calculators use.
- Pricing
- Free, open source, no signup.
- Best for
- anyone deciding whether to pay off a loan or invest extra money.
