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⚖️ How much would you save paying debt instead of investing a windfall?

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Reviews of How much would you save paying debt instead of investing a windfall?

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Finn

This calculator tackles one of the most common financial dilemmas: whether to use a sudden chunk of cash to wipe out debt or invest it for the future. It stands out by correctly modeling the freed-up cash flow, meaning it assumes that once your debt is paid off, you'll start investing your old monthly payment. I always keep a sharp eye out for lopsided comparisons, but the math here lands perfectly on its feet. You'll want to keep in mind that the investment returns don't account for taxes, so if you're investing in a taxable account, the actual wealth gained from investing might be slightly lower than shown.

Reviewed v26.10.0

Oct 6, 2026