This student loan calculator estimates a fixed monthly payment from loan amount, annual interest rate, and term in months. Payment follows standard amortizing PMT math.
Graduates use it to compare 10 year versus longer schedules before choosing a repayment plan. For income driven framing on Multicalify, see the RAP student loan calculator. Generic loan math also lives on the loan calculator.
How the formula works
Monthly rate = annual rate÷100÷12. The payment covers interest and principal so the balance reaches zero after the stated months when payments stay on schedule.
Worked example
Principal $35,000, rate 5.5 percent, term 120 months. Monthly payment ≈ $379.84.
| Input | Value |
|---|---|
| Loan amount | $35,000 |
| Annual interest rate | 5.5% |
| Term | 120 months |
| Monthly payment | ~$379.84 |
How to use the fields
- Loan amount is the principal you will amortize.
- Annual interest rate is the loan APR style rate used in this model.
- Term is the number of monthly payments.
Term tradeoffs
Longer terms lower the monthly bill and usually raise total interest. Shorter terms cost more each month and clear the debt sooner. Run both before you lock a plan.
Multiple loans
If you have several balances, calculate each payment, then sum them for a household total. Consolidation changes rates and terms; re enter the new combined principal and rate rather than averaging old payments blindly.
Common mistakes
- Entering years in the months field
- Forgetting origination fees that raise principal
- Comparing subsidized and unsubsidized loans without noting interest timing
- Ignoring that income driven payments can differ from this fixed PMT
Budget checklist
- List every loan’s balance and rate.
- Estimate each fixed payment.
- Add a cushion for tax withholding changes after graduation.
- Recheck when refinance or consolidation quotes arrive.
Refinancing notes
Private refinance can cut rate for strong credit but may trade away federal protections. Model the new PMT here, then weigh benefits you might lose.
Interest while in school
Unsubsidized interest can accrue before repayment begins. If your principal at repayment already includes capitalized interest, enter that higher balance. Using the original disbursement amount understates the payment.
Subsidized loans follow different interest rules during qualifying periods. Keep loan types separate when rates differ.
Autopay and rate discounts
Some servicers offer a small rate discount for autopay. Re run the payment with the discounted rate to see the monthly change. Confirm that the discount continues after refinancing or switching servicers.
Extra principal payments shorten interest cost but are optional on standard amortization. This calculator shows the scheduled payment only.
Household budgeting with other debts
Stack student loan payments beside rent, cars, and minimum cards. If the fixed PMT crowds essentials, explore longer terms or income driven options with eyes open about total interest and forgiveness tax questions. Document every assumption you used when talking with a counselor.
Grace periods and first bill timing
The first bill after a grace period can surprise graduates who modeled payments but not timing. Set a calendar reminder one month before repayment begins. If interest accrued, update principal before you trust an old payment estimate.
Keep login access to every servicer portal. Sold loans change websites, not the need to pay.
Cosigners and refinance credit checks
Private refinance can remove a cosigner later but starts with credit checks and possibly losing federal protections. Model the new rate and months here, then list non numeric tradeoffs before you sign. Cosigners should see the payment estimate too so shared risk is clear.
If you stay in federal plans, keep using official servicer calculators for IDR payments and treat this PMT as a baseline comparison only.
Standard ten year versus extended schedules
The default 120 month example is a classic ten year path. Extending to 240 months lowers the monthly PMT and raises total interest. Run both terms with the same principal and rate so you see the cash flow trade clearly before you choose convenience over speed.
Partial prepayment toward principal after the scheduled payment can blend a long term bill with a shorter payoff if your servicer applies extra cash correctly. Confirm application rules in writing.
Limitations
Results omit deferment, forbearance, and servicer rounding quirks. They are planning estimates, not billing statements. Confirm official amounts in your loan portal.