Student Loan Amortization Calculator
Full payment schedule — principal, interest, and balance for every month.
Your Student Loan Amortization Calculator Result
Generated from the inputs below — a record you can revisit, or share with anyone helping you plan.
Your detailsInput Parameters
Your Student Loan
Federal Direct rates reset each July 1 — check studentaid.gov for the current year's rate
Standard federal plan is 10 years; extended and income-driven plans run longer
Share of every payment that goes to interest rather than principal, front-loaded early in the term.
Analysis
Amortization schedule
Yearly view| Year | Interest | Principal | Balance |
|---|---|---|---|
| 1 | $140 | $193 | $27742 |
| 2 | $128 | $205 | $25344 |
| 3 | $115 | $218 | $22799 |
| 4 | $102 | $231 | $20097 |
| 5 | $87 | $246 | $17228 |
| 6 | $72 | $261 | $14182 |
| 7 | $56 | $277 | $10948 |
| 8 | $39 | $294 | $7515 |
| 9 | $21 | $312 | $3870 |
| 10 | $2 | $331 | $0 |
| Period | Interest | Principal | Balance |
|---|---|---|---|
| 1 | $150 | $183 | $29817 |
| 9 | $143 | $191 | $28319 |
| 17 | $135 | $198 | $26760 |
| 25 | $127 | $206 | $25138 |
| 33 | $118 | $215 | $23450 |
| 41 | $110 | $223 | $21693 |
| 49 | $100 | $233 | $19864 |
| 57 | $91 | $242 | $17961 |
| 65 | $81 | $252 | $15981 |
| 73 | $71 | $262 | $13920 |
| 81 | $60 | $273 | $11775 |
| 89 | $49 | $284 | $9542 |
| 97 | $38 | $295 | $7219 |
| 105 | $26 | $308 | $4802 |
| 120 | $2 | $331 | $0 |
Email me this result
Free financial calculators. Where an official rule applies, the calculator shows the source it was checked against. No sign-up, and every calculation runs entirely in your browser — nothing you type is ever sent to us.
You might also need
Picked based on what this calculator does
Student Loan Repayment
Plan student debt payoff.
Open calculatorStudent Loan Consolidation Calculator
Weighted-average rate, new payment, and lifetime interest change.
Open calculatorLoan Payoff Calculator
Pay off any loan early with extra payments.
Open calculatorComplete Loan Calculator
Payment, payoff, and amortization in one.
Open calculatorInterest Rate Analyzer
APR vs Nominal rate.
Open calculatorDebt Payoff Optimizer
Snowball vs Avalanche strategies.
Open calculatorStudent Loan Amortization Calculator: See Every Payment
This student loan amortization calculator builds the full month-by-month payment schedule for a fixed-rate student loan: how much of each payment goes to interest, how much reduces the balance, and what you owe after every payment until the loan hits zero.
Worked example: a $30,000 balance at 6% for a standard 10-year term produces a monthly payment of $333.06 and $9,967.38 of total interest over the life of the loan. The very first payment splits into $150.00 of interest and $183.06 of principal — that split shifts toward principal every month as the balance shrinks.
Already paying and just want the full history laid out for tax or budgeting purposes? This tool gives you the complete table. If you're deciding how to pay it off faster, the Loan Payoff Calculator models extra payments and lump sums against this same balance. Juggling several federal loans? The Student Loan Consolidation Calculator shows what combining them into one payment would actually cost.
How the Amortization Schedule Is Calculated
Student loans amortize the same way any fixed-rate installment loan does. The CFPB explains the standard formula used across federal and most private student loans:
- M — fixed monthly payment
- P — starting balance
- r — monthly interest rate (annual rate ÷ 12)
- n — total number of monthly payments (years × 12)
Each month, interest is charged on the remaining balance first (balance × r), and whatever is left of the fixed payment reduces principal. Because the balance falls every month, the interest charge shrinks and the principal portion grows — the schedule this calculator generates shows that shift row by row.
Federal vs. Private Student Loan Amortization
The math shown here applies equally to federal Direct Loans and private student loans once you're in standard repayment — both amortize on a fixed schedule at a fixed rate. The differences that matter show up around the edges: federal loans accrue simple daily interest and offer income-driven plans that this straight-line amortization doesn't model, while private loans may carry variable rates that change the monthly payment over time. For a rate that resets, re-run the calculator with the new rate from the point it changes forward — the remaining balance becomes your new starting principal.
If you're on an income-driven repayment plan rather than standard amortization, your payment is set by income and family size instead of the formula above, and you may see the balance grow before it shrinks. This calculator is built for fixed-payment, fixed-rate amortization — standard, graduated (in its early flat-payment phase), and most refinanced private loans all fit that model.