Amortization Schedule Breakdown: How Mortgage Payments Split Over Time
Learn how fixed-rate mortgage payments shift from interest-heavy to principal-heavy over 15 and 30-year loan terms.
What is an Amortization Schedule?
An amortization schedule is a complete table detailing every periodic payment on an amortizing loan. Each line item tracks how your fixed monthly payment is divided into principal reduction and interest charges.
The Early-Year Interest Heavy Curve
Because interest is calculated monthly against your remaining loan balance, early mortgage payments are heavily skewed toward interest. On a $400,000 30-year fixed loan at 6.5%, month 1 assigns 80.2% of your payment to interest ($2,166.67) and only 19.8% to principal ($535.95).
Amortization Crossover Point
The crossover point occurs when your monthly payment shifts to paying more principal than interest. For a 30-year fixed loan, this typically happens around Year 18.5.
Accelerating Your Amortization Schedule
- Bi-weekly Payment Strategy: Making 26 half-payments per year equates to 13 full monthly payments, shaving 4+ years off a 30-year term.
- Targeted Principal Extra Payments: Adding $200/month directly to principal accelerates the crossover point by over 5 years.