Home Equity Loan Calculator Formula & How It Works
- Most lenders allow combined LTV of up to 85% (some up to 90%)
- Home equity loan is a fixed-rate second mortgage
- Monthly payment uses the standard amortization formula
- Interest may be tax-deductible if used for home improvement
Home equity loans allow you to borrow against your home's equity in a lump sum at a fixed rate. Lenders typically allow combined loan-to-value (CLTV) up to 80–85%. The payment uses the same amortization formula as a mortgage: M = P[r(1+r)ⁿ]/[(1+r)ⁿ−1].