Calculate your student loan repayment timeline, monthly payment, total interest, and whether your loan will be paid off or written off. Supports fixed monthly repayment and income-based repayment.
Country
Currency
🏫
Your Student Loan
Loan Details
€
Your current outstanding loan balance.
%
The annual interest rate applied to your loan.
Repayment Mode
€
Your fixed monthly repayment amount. Must exceed monthly interest to reduce the balance.
€
Your current gross annual income.
€
Annual income above which repayments apply.
%
Percentage of income above threshold deducted as repayment.
Write-Off & Term
yrs
Any remaining balance written off after this period. Select no write-off for standard loans.
%
Expected annual income growth rate. Used to project rising repayments in income-based mode.
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—
—
Monthly Payment
—
per month
Total Repaid
—
cash out of pocket
Total Interest
—
interest accrued
Payoff / Write-Off
—
years from now
Loan Balance
—
starting
Interest Rate
—
annual
Monthly Interest
—
on opening balance
Monthly Payment
—
repayment
Monthly Principal
—
balance reduction
Total Repaid
—
all payments
Total Interest
—
over loan life
Amount Written Off
—
if applicable
Years to Payoff
—
or write-off
Interest / Repaid
—
interest share
Repayment Breakdown
—
Monthly payment—
Years to clear—
Total repaid—
Total interest—
Amount written off—
—
Monthly payment—
Years to clear—
Total repaid—
Total interest—
Amount written off—
Loan Balance Over Time
Balance
Cumulative repaid
Balance at Milestone Years
Year
Balance Remaining
Cumulative Repaid
Cumulative Interest
Status
Repayment by Income Level
Annual Income
Monthly Payment
Annual Repayment
Years to Clear
Total Repaid
Written Off
Important: This calculator estimates student loan repayment using the balance, interest rate, and repayment parameters you enter. It does not apply any country-specific loan plan rules, income-contingent repayment legislation, interest rate caps, government write-off policies, or repayment holiday provisions. Results are estimates only. Always check with your loan servicer or official student finance body for accurate figures.
✦ Cal, AI Explanation
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Your student loan estimate is ready. Ask me about how interest builds up, whether income-based repayment makes sense, or what write-off means for your loan.
🏫 Key Notes
If monthly interest exceeds payment, the balance grows regardless of repayments
Income-based repayments are tied to earnings above a threshold
Write-off cancels the remaining balance after a set period
Overpaying reduces interest but may not be optimal if write-off applies
No country-specific rules applied — enter your own rates
Student loan repayment depends on whether your plan uses a fixed monthly payment or income-based repayment. Interest accrues on the outstanding balance every month. Each payment first covers that month's interest, with any remainder reducing the principal. If the payment is smaller than monthly interest, the balance grows.
Repayment Type
How It Works
Key Variable
Fixed monthly payment
Same amount each month; balance reduces steadily if payment exceeds interest
Payment amount
Income-based repayment
A percentage of income above a threshold; payment rises with earnings
Income, threshold, rate
Write-off
Remaining balance cancelled after a fixed number of years
Write-off year
When balance grows despite making payments
If the monthly interest accruing on the loan is larger than the monthly payment, the unpaid interest is added to the balance. This is called negative amortisation. It is common with income-based plans when income is low and the repayment is below the interest cost. The balance will keep growing until income rises enough for repayments to exceed monthly interest.
Should you overpay a student loan with a write-off?
Whether overpaying makes financial sense depends on whether you expect to clear the loan before the write-off date. If your projected repayments under normal conditions would result in a write-off of a large balance, overpaying accelerates payoff but means you repay more than you would have needed to. If you expect to clear the loan well before write-off, overpaying saves interest. The comparison section in this calculator shows both scenarios side by side.
Income-based repayment and income growth
Income-based plans charge a percentage of earnings above a threshold. As income grows, the repayment amount grows and the loan reduces faster. This calculator projects income growth at an annual rate you enter, which increases the monthly payment each year and changes the payoff timeline accordingly.
Frequently Asked Questions
Why is my student loan balance increasing?+
If your monthly payment is less than the interest accruing on the balance that month, the difference is added to the principal. This happens frequently with income-based repayment plans when income is low, or at the start of repayment when balances are large relative to payments. The balance will start falling once repayments exceed monthly interest.
What is a repayment threshold?+
A repayment threshold is the annual income level above which student loan repayments are triggered. You only repay a percentage of the income that exceeds this threshold. If your income falls below the threshold, repayments stop automatically. The threshold is set by your loan plan and may change each year.
What does write-off mean for a student loan?+
A write-off means any remaining loan balance is cancelled by the lender or government after a fixed number of years of repayment. You are no longer required to repay the written-off amount. However, in some countries a written-off balance may be treated as taxable income in the year it is cancelled. The rules depend on your country and loan plan.
Is it worth making extra payments on a student loan?+
Extra payments reduce the balance and save interest, but they only make financial sense if you are likely to clear the loan before the write-off date. If the loan will be written off regardless, extra repayments mean you pay more than necessary. Use this calculator to compare the total amount repaid under normal and accelerated schedules before deciding.
Why does this calculator not show my exact plan details?+
Student loan rules are highly specific to each country, loan plan, and year of study. Thresholds, rates, interest caps, and write-off terms are updated regularly and differ between plans within the same country. This calculator uses the values you enter to give a planning estimate. For your exact figures, check with your official student loan servicer.
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