Another little JavaScript calculator. Use this to compare the real after-tax interest rate of your mortgage. Then compare your after-tax yields on taxed investments and tax protected (i.e. tax-deferred 401(k),403(b),IRA accounts or tax free Roth or Education IRA accounts). See where is the best place to put your money!

Put Inputs Here

Nominal Mortgage Interest Rate
Nominal After-Tax Investment Yield Rate
Marginal Federal Tax Rate
Marginal State Tax Rate

Effective After-Tax Loan Interest Rate: %

Effective After-Tax Investment Yield Rate: %

Effective Tax-Protected Investment Yield Rate: %

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