The Hidden Cost of a 30-Year Mortgage (Run the Numbers Yourself)

A $400,000 house at 7% interest on a 30-year mortgage costs you $958,036 by the time it's paid off. That's $558,036 in interest alone. You're paying for the house almost two and a half times over. Most people don't run these numbers before they sign. They focus on the monthly payment, the realtor tells them they're "pre-approved," and they move forward without understanding how amortization actually works against them for the first decade. How the Monthly Payment Formula Works The standard mortgage payment formula looks intimidating but it's straightforward once you break it down: M = P[r(1+r)^n] / [(1+r)^n - 1] P is the principal (loan amount). r is the monthly interest rate (annual rate divided by 12). n is the total number of payments (years times 12). For that $400K loan at 7%: r = 0.07/12 = 0.00583. n = 360 months. Your monthly payment comes out to $2,661. That $2,661 stays the same every month for 30 years. But where that money goes changes dramatically over time. The Front-Loadi