Mortgage prepayment to reduce monthly payment
🏠 Model a partial prepayment to lower your monthly payment: new payment, interest savings, and side-by-side amortization schedules.
Early repayment simulator to reduce your mortgage payment
We compare two scenarios: keeping the loan as-is and making a partial prepayment focused on lowering the instalment. The simulator recalculates the new payment, the total interest and how much you save each month when you reduce the mortgage payment.
Once you fill in the form you will get the amortization schedule before and after the prepayment, so you can see how the outstanding balance decreases while the term stays the same.
New payment: 0.00
Difference versus current payment: 0.00
Interest remaining without prepayment: 0.00
Interest after prepayment: 0.00
Interest saved: 0.00
The lump sum is applied at the beginning of the period while keeping the same number of instalments.
Payment summary
- Current payment: 0.00
- New payment: 0.00
- Savings per instalment: 0.00
Once you run the calculation you'll see how the balance decreases while keeping the same term.
How to use the calculator to lower your mortgage payment
- Enter the outstanding principal, annual interest rate, and remaining term of your mortgage or loan.
- Type the amount you want to allocate to an early repayment or partial prepayment while keeping the term unchanged.
- Run the calculation to get the reduced instalment, quantify the interest savings, and confirm the new payment amount.
- Review the updated amortization table and repayment schedule to compare the scenario with and without the prepayment.
Early repayment and partial prepayments to reduce the instalment
An early repayment or partial prepayment applies an extraordinary contribution directly to the outstanding principal. When you choose to keep the same term, the effect is a lower instalment instead of a shorter duration, which is ideal when you want to reduce the monthly payment.
This partial prepayment calculator shows how the interest portion of each instalment shrinks, how much capital you still owe, and how the savings accumulate across the amortization schedule.
If you would rather shorten the term instead of lowering the payment, remember there is another dedicated calculator for that scenario.
Amortization systems and the new payment after prepaying
Most mortgages follow the French amortization system, which keeps the instalment constant even though the composition of interest and principal changes over time. By injecting a lump sum, the principal drops and the same system recalculates a smaller instalment.
This tool recomputes the payment according to the chosen amortization system and immediately produces a refreshed amortization schedule showing the impact on each future instalment.
The result is a clear view of the new payment after prepaying so you can decide whether reducing the instalment suits your financial goals.
Frequently asked questions about lowering your payment with early repayment
How can I lower my mortgage payment with a partial prepayment?
Enter the outstanding balance, interest rate, remaining term, current payment, and the lump sum into the prepayment calculator. The tool recalculates a lower instalment, highlights the interest savings, and provides the updated amortization schedule.
What is the difference between reducing the payment and reducing the term?
Reducing the payment keeps the loan length intact and lowers the monthly instalment, which is what this calculator focuses on. Reducing the term keeps a similar instalment but shortens the loan, and there is a different calculator dedicated to that goal.
Can I use the calculator for personal loans as well as mortgages?
Yes. You can also use it as a loan amortization calculator to obtain a reduced instalment and a refreshed amortization table after the partial prepayment.
