Extra Student Loan Payments
Every extra dollar skips future interest. Here is the math on how $50, $100, or $200 extra a month changes your payoff.
$100 extra monthly on a $30,000, 6%, 10-year loan pays it off ~2.8 years early and saves ~$3,000 in interest. Direct extras to principal, target the highest-rate loan first, and keep an emergency fund before accelerating.
The math of an extra $100
On $30,000 at 6 percent over 10 years, the standard payment is about $333 with about $9,967 in total interest. Add $100 a month and the loan ends about 2.8 years early, with total interest falling to about $6,900. That $100 bought roughly $3,000 of avoided interest.
The effect compounds because extra payments reduce principal immediately, which reduces every future month's interest charge. Early extras are worth more than late ones: $100 extra in year one saves more than $100 extra in year nine.
Make sure it hits principal
Tell your servicer to apply extra payments to principal, not as advance payments of future bills. Some servicers default to pushing your due date forward, which keeps interest accruing on the full balance.
After each extra payment, verify the principal dropped by the expected amount. Servicer errors on payment application are common enough to check.
Which loan first: avalanche
With multiple loans, direct all extra money to the highest interest rate first while making minimums on the rest. This avalanche order minimizes total interest mathematically.
The snowball order, smallest balance first, costs slightly more interest but delivers faster wins. Choose avalanche for math, snowball for motivation; both beat spreading extras evenly.
When not to accelerate
Do not send extra loan payments while carrying higher-rate debt: a 22 percent credit card balance beats a 6 percent student loan every time. Do not drain your emergency fund to prepay either; the fund prevents new debt.
And do not accelerate while leaving free money behind: an employer 401(k) match is an instant 50 to 100 percent return, which no prepayment can touch.
Automate the extra
Set the extra as a recurring payment rather than a monthly decision. What gets automated gets done; what requires willpower gets skipped.
Revisit yearly: raises are the painless source of bigger extras. Directing half of every raise to the loans accelerates payoff without ever feeling a lifestyle cut.
Skip the arithmetic
See your own extra-payment savings with the free student loan calculator.
Extra payments
How much can extra payments save on student loans?
Substantially. On a $30,000 loan at 6 percent over 10 years, $100 extra monthly saves about $3,000 in interest and finishes the loan roughly 2.8 years early. $200 extra saves about $4,700 and cuts about 4.4 years. The savings grow with the loan's rate and balance.
Should extra payments go to principal?
Yes, always direct extras to principal. Some servicers apply overpayments to future scheduled payments by default, which advances your due date but leaves the balance, and the interest, accruing. Specify principal-only application in writing.
Is it better to invest or pay extra on student loans?
Compare guaranteed versus expected returns. Extra payments earn a guaranteed return equal to the loan rate: 7 percent on a 7 percent loan. Investing offers higher expected returns with volatility. High-rate loans favor prepayment; low-rate loans favor investing, assuming a long horizon and an emergency fund in place.