Your results
Loan term
Months remaining until payoff — minimum payments only with your extra payments
Remaining balance over time
Watch the balance drop faster right where an extra payment hits — once-off payment recurring payment starts.
Interest vs. principal per payment
The dashed line shows the interest portion if you'd paid only the minimum.
Cumulative interest paid
with extra payments minimum payments only
Full amortization schedule
recurring payment active this month
once-off payment applied this month
"Minimum required" is recalculated each month against your actual balance and the months left to the original payoff date — it drops as your extra payments pull the balance below the original plan.
| # | Date | Payment | Minimum required | Interest | Principal | Recurring | Once-off | Balance |
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Frequently asked questions
Should I pay extra into my bond?
Paying more than the minimum required installment reduces how much interest accrues on the outstanding balance, so you pay off the loan sooner and pay less interest overall — even a relatively small extra amount adds up over a long-term loan.
Recurring vs. once-off — what's the difference?
A recurring extra payment adds a fixed amount to your regular installment every month, optionally until an end date you choose. A once-off payment is a single lump sum applied in one specific month — a bonus or windfall put straight onto the balance, for example.
Why does "Minimum required" change partway through the schedule?
Once an extra payment pulls your balance below where the original schedule expected it to be, the amount still needed to finish by the original date drops too — the same way a bank recalculates your installment after a lump-sum payment. It only shifts in months where an extra payment actually lands, and holds steady otherwise.
Will my bank's numbers match this exactly?
This tool uses standard reducing-balance amortization — the same method most banks use — but assumes your entered rate stays fixed for the full term, while real bonds are usually variable-rate. Treat this as a planning guide rather than a binding quote; your bank's figures may differ slightly due to rounding, fees, or rate changes.