The standard case: $100,000 at 6% for 30 years
- Input
- Amount = $100,000, Rate = 6% per year, Term = 30 years (360 months)
- Working
- Monthly rate r = 6 / 1200 = 0.005. Payment = 100,000 × 0.005 / (1 − 1.005^(−360)) = $599.55. Month 1: interest = 100,000 × 0.005 = $500.00, so principal = 599.55 − 500.00 = $99.55 and the balance falls to $99,900.45.
- Result
- Payment = $599.55/month; total paid $215,838.45; total interest $115,838.45