Guide
How to Read an Amortization Schedule
Understand principal vs interest over time and use amortization outputs to plan prepayments.
Quick answer: Amortization schedules show how each payment splits between interest and principal across the loan lifecycle.
How to use this guide
- Generate a base schedule from your current balance, rate, and term.
- Add optional extra principal to compare payoff speed changes.
- Export yearly or monthly rows for side-by-side lender scenario review.
Common mistakes
- Small monthly rounding differences can occur versus lender systems.
- Skipping escrow costs can understate true monthly housing spend.
- Comparing schedules with different terms without labeling can cause confusion.
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FAQs
Why do extra principal payments help so much?
They reduce balance earlier, which lowers the future interest charged on remaining principal.
Can I use yearly view instead of monthly?
Yes. Yearly summaries are often enough for planning while monthly rows are useful for precise tracking.
Does this account for late fees?
No. This model assumes on-time payments and standard amortization.