Amortization Schedule for a Typical Utah Home Loan
The amortization formula for a fixed-rate loan is:
M = P × [r(1+r)^n] / [(1+r)^n − 1]
M = monthly payment | P = principal | r = monthly rate (annual ÷ 12) | n = total payments
For Utah's median home scenario — $517,500 loan at 6.51%:
- Monthly rate r = 6.51% ÷ 12 = 0.5425%
- Monthly payment M = $3,274
- Month 1 interest: $2,807 | Month 1 principal: $467
- After 5 years (60 payments): balance still $484,518
- After 15 years (180 payments): balance still $375,755 (73% of original)
- Total interest over 30 years: $661,140
The key insight: after paying $3,274/month for 15 years — halfway through the loan — you still owe $375,755. This is because early payments are almost entirely interest. Paying just $200 extra per month would save approximately $115,596 in interest and shorten the loan by roughly 4.5 years.