The formula behind the number
We use the standard amortization formula M = P × r / (1 − (1 + r)^−n), where P is the loan amount, r is your monthly rate (APR ÷ 12) and n is the number of monthly payments. A $50,000 heloc / home equity loan at 9% APR over 120 months works out to roughly $633 per month.
