Formula
The calculator simulates month-by-month interest and principal reduction with and without extra payments.
Example
Adding $200 per month to a $300,000 balance can shorten payoff time and reduce interest.
Result notes
- Results are estimates based on the values you enter.
- Calculators with schedules show how values change over time.
- For financial, health, or construction decisions, compare these estimates with professional advice when needed.
Frequently asked questions
Does this include escrow?
No. Use only the principal-and-interest portion of the payment.
What if the payment is too low?
If payment does not cover monthly interest, the loan will not amortize.
Can I model one-time extra payments?
This MVP models recurring monthly extra payments.