Student Loan Payoff Calculator, Debt-Free Date & Interest Saved

By the MoneyCalcsHub editorial teamLast updated:

See your student loan monthly payment, payoff date and how much interest extra payments save you.

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Formula

Standard amortization: M = B·r·(1+r)^n / ((1+r)^n − 1) with r = annual rate / 12; with extra payments the balance is simulated month by month until it reaches zero.

Examples

InputResult
$30,000 at 5.5%, 10 yrs$325.58/mo · $9,069 total interest
$30,000 at 5.5%, 10 yrs, +$100/mo94 months · saves $2,006
$50,000 at 6.8%, 10 yrs, +$200/mo84 months · saves $5,196

Frequently Asked Questions

Should I pay extra on my student loans?

Mathematically yes if the rate is above what safe savings earn, every extra dollar of principal stops accruing interest immediately. Keep an emergency fund first, and if you are pursuing forgiveness (PSLF or IDR-based), extra payments can actually cost you, check before overpaying.

Does this work for federal and private loans?

The math is the same for any fixed-rate amortized loan. Federal loans on income-driven plans do not amortize normally, so use your actual monthly amount rather than the standard plan figure.

What is the fastest payoff strategy?

Avalanche (extra money to the highest-rate loan) saves the most interest; snowball (smallest balance first) keeps motivation up. This calculator models one loan, run each of yours separately.

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Disclaimer: This calculator is for informational and educational purposes only and does not constitute financial, investment, tax or legal advice. Results are estimates, actual returns, rates and terms vary. Consult a qualified financial professional before making financial decisions.

How this page is built and kept current. Written and fact-checked by the MoneyCalcsHub editorial team. We do not sell financial products and we accept no payment to change a result, the arithmetic on this page runs in your own browser from the numbers you type.

Official sources used on this page:

Source-dependent figures are reviewed when the cited issuer publishes an update. Worked examples show the formula applied to the listed inputs; interactive results are calculated in your browser.

Spotted an error? Write to [email protected], corrections are published on the page and the last-updated date changes with them. Full process: editorial policy.