Finance & Money
Student Loan Repayment Calculator
Estimate the scheduled payment, planned payment, payoff duration, and total interest for one fixed-rate balance. The repayment visual separates scheduled debt service from the time and interest removed by extra principal.
Scheduled monthly payment-
Planned monthly payment-
Estimated payoff time-
Estimated total interest-
Decision view
Scheduled and accelerated student-loan paths
Scheduled and accelerated student-loan pathsThe same opening balance follows two payoff paths so extra principal, payoff time, and modeled interest remain distinguishable.
Exact scenario comparisonExtra monthly payment changes while all other entered assumptions remain constant.
| Extra monthly payment | Scheduled monthly payment | Planned monthly payment | Estimated payoff time | Estimated total interest |
|---|
Period-by-period detail
Monthly schedule and annual summary
How to use Student Loan Repayment Calculator
- Enter one balance and its current contractual APR.
- Use the remaining term—not the original term—when reviewing an existing loan.
- Confirm with the servicer that extra payments are applied to principal and that no prepayment restriction applies.
Calculator guide
Understanding Student Loan Repayment Calculator
Student-loan repayment depends on the contractual rate, scheduled term, payment timing, and whether extra cash is applied directly to principal. The useful comparison is the scheduled path versus the entered accelerated-payment path.
Calculation method
How the calculation works
Calculate the scheduled fixed-rate payment, add the entered extra principal amount, and model the balance until payoff. Calculate the level monthly payment from balance, APR, and term. Add the entered extra amount, then amortize the balance month by month until payoff and total the modeled interest.
Strategy check
When faster payoff may not be the only objective
Loan type and borrower protections can matter as much as the nominal APR.
Worked situations
Practical examples
- A $45,000 balance at 5.5% over 10 years has a scheduled payment near $488.
- Adding $100 raises the planned payment to about $588.
- The accelerated path should be read alongside months saved and interest avoided, not payment alone.
Better inputs
Useful tips
- Model loans with different rates separately before combining results.
- Keep an emergency reserve before committing every surplus dollar.
- Recheck capitalization after deferment, forbearance, or a repayment-plan change.
Before relying on the result
Limitations and common mistakes
- The model assumes one fixed APR and regular monthly payments.
- Income-driven payments, subsidies, forgiveness, deferment, capitalization, taxes, and servicer allocation rules are excluded.
- Quoted payoff values can differ because of daily interest and payment dates.
Reference
Key terms
- Scheduled payment
- Level payment that amortizes the entered balance over the entered term.
- Extra principal
- Payment above the scheduled amount intended to reduce balance.
- Capitalization
- Unpaid interest added to principal under applicable loan rules.
- Payoff horizon
- Modeled number of payments until the balance reaches zero.
Important note
Calculated from the entered values and stated financial terms. It is not a product quote, lending decision, tax filing, or investment recommendation.
Frequently asked questions
Does an extra payment always shorten the loan?
Only if the servicer applies it to principal rather than advancing the due date or holding it as future payment.
Should several student loans be averaged together?
Separate modeling is safer because rates, protections, and repayment rules can differ.
Is refinancing included?
No. A refinance comparison needs the new rate, term, fees, protections lost, and qualification assumptions.
Why can the servicer payoff quote differ?
Servicers may accrue interest daily and quote payoff through a specific date.