Interest saved viewStrong impact€250 monthly extra
Actions
Impact signal
Strong
Your extra payment plan materially accelerates payoff and cuts interest.
Before vs after
Original payoff
0 yrs
without extras
New payoff
0 yrs
with extras
Original interest
€0
without extras
New interest
€0
with extras
Interest saved
€0
Months saved
0
Balance after 5 years
€0
Payment breakdown
Current required payment
€0
Extra monthly payment
€0
Annual lump sum
€0
One-time extra
€0
Total extra paid
€0
Balance impact
Original balance after 1 year
€0
New balance after 1 year
€0
Original balance after 5 years
€0
New balance after 5 years
€0
5-year balance improvement
€0
Scenario comparison
No extra payments
€0
interest
Current plan
€0
interest
Boosted plan
€0
interest
Cal insight
Enter your balance, rate, payment and extra payment plan to see how much interest and time you can save.
Mortgage outcome structure
Original interest
New interest
Interest saved
Scenario table
Scenario
Interest paid
Payoff time
Extra paid
Balance after 5 years
5-year outlook
Year
Original balance
New balance
Difference
What this calculator does
This calculator shows how extra mortgage payments change payoff time, total interest and balance reduction. It models standard required payments first, then layers in monthly extras, annual lump sums and one-time principal reductions.
Core logic
New payoff path = required payment + scheduled extra payments
Interest saved = original total interest − new total interest
Time saved = original payoff months − new payoff months
Why extra payments matter
Extra payments typically hit principal directly, which reduces future interest calculations. Even modest recurring extras can shorten the mortgage meaningfully over time.
How to use it properly
Use your actual current balance, required payment and interest rate. For the most realistic result, include the month your extra payments start and whether they will continue for the full term or only for a limited number of years.
Frequently asked questions
Yes. Extra payments usually reduce principal earlier, which lowers future interest accrual and shortens payoff time.
Monthly extras often reduce principal earlier, but large lump sums can also be powerful. The best answer depends on timing and discipline.
Usually not. The required payment often stays the same unless the loan is formally recast. Extra payments typically shorten the term instead.
Yes. This calculator lets you model stopping extras after a certain number of years so you can see partial-impact scenarios.
Not always. The decision depends on your interest rate, liquidity needs, alternative returns and whether your lender imposes any prepayment limitations.
No. It is a decision-support calculator. Official lender statements and loan servicing rules remain the source of record.