Tool-18 // Student Loan Repayment Calculator
See your payoff timeline, total interest cost, and how much faster you'd be done by paying a little extra each month.
The total remaining principal on your student loans.
Your weighted average interest rate across all loans.
What you actually pay each month toward this loan.
First month: ~$138 goes to interest, ~$213 to principal.
Educational estimates only — not personalized financial advice. Calculator inputs stay on your device. Disclaimer · Privacy
// How to use this instrument
Plain-English guide for Student Loan Repayment Calculator. Read alongside your results — then re-run scenarios.
Payoff timeline and interest under fixed payment or term.
This Student Loan Repayment Calculator runs entirely in your browser. Calculator inputs stay on your device and are not stored on TopMoneyTools servers as account data.
Outputs are educational planning estimates. They do not replace lender quotes, tax software, insurance underwriting, or licensed advice.
Reach for this tool when: Graduation planning; refinance curiosity (educational).
Use more than one scenario. Changing rate, timeline, or spending often moves the answer more than people expect.
If you are close to a major decision (home purchase, retirement date, large debt payoff), treat this as a pre-conversation tool — then verify with primary documents and a professional who knows your full situation.
How to use it: Balance → rate → payment or years → extra payment.
Label units carefully (monthly vs annual income, APR vs monthly rate).
After the first run, stress-test: higher rate, lower return, shorter timeline, or higher expenses. The range matters more than one precise output.
How to read results: Extra payment impact; total cost of deferring.
If a result looks surprising, re-check units, whether taxes/fees are included, and whether you modeled best-case assumptions only.
Use related guides and tools below to cross-check the story from another angle.
Educational estimates only — not personalized financial advice. Results depend on your inputs. Disclaimer · Privacy · Terms.
Unlike mortgages, federal student loan interest typically accrues daily. This means every day you wait to pay costs you money — even small extra payments can meaningfully reduce total interest over the life of the loan.
IDR plans cap your payment at a percentage of income, but they can extend your repayment to 20-25 years. You'll pay far more in total interest, and the forgiven amount may be taxable — a surprise many borrowers don't anticipate.
Refinancing federal loans to a private lender can lower your rate significantly, but you lose federal protections like income-driven repayment, deferment, and forgiveness programs. Make sure you won't need those before you refinance.
Want to understand the concepts behind these numbers?
Cookies & ads. Calculators run in your browser — we don’t store your inputs. Google AdSense may use cookies for ads and measurement. Privacy Policy. In the EEA/UK a separate Google consent prompt may also appear.