Student Loan Payoff Calculator
Estimate payoff date and total interest. Test extra payments, loan servicer options, and refinance student loans scenarios.
Your Student Loan
Enter balance, APR, and monthly payment. Optionally add an extra monthly payment.
Assumes monthly compounding and regular monthly payments.
Graph
Here's a visual breakdown of your payoff timeline
Month-by-month payoff schedule
Desktop shows a table. Mobile shows stacked rows.
| Month | Starting balance | Interest | Payment | Ending balance |
|---|
Scroll to see all months.
Results
Your payoff summary updates after calculation.
You Know Your Timeline. Now Make Sure You're Not Slowing It Down.
Student loans have unique payoff traps that most people don't see until they've already lost months of progress. This free guide covers the ones that hit hardest.
- The deferment mistake that feels responsible but costs you later
- Why knowing your payoff date isn't enough on its own
- Instant PDF download — no credit card required
Many recent graduates carry both student loans and credit card balances from college. If that’s you, revisit the Credit Card Payoff Calculator.
Your Student Loan Payoff Results — Timeline and Total Interest
Your payoff timeline is driven by your balance, interest rate, and how consistently you pay each month.
-
🎓 Student loans reward consistency
Based on your inputs, your plan works best when payments stay steady. Even small changes to your monthly payment can shift the payoff date over time. -
💸 Extra payments usually reduce interest over time
Your results show how paying above the minimum can reduce the balance sooner, which lowers how much interest accrues moving forward. -
📅 Don’t ignore repayment details
Micro-example: Different repayment plans, servicer rules, or interest capitalization can change the real outcome. Use the calculator as a planning baseline — your totals are shown above.
If you want a clear next step based on these results…
Used your calculator? Get the action plan.
The Student Loan Planner
Your calculator showed your timeline. This plan builds a repayment strategy around your income and goals — so you stop guessing and start making real progress.
- ✓ Compare federal repayment options side by side
- ✓ See exactly what income-driven repayment means for your situation
- ✓ Know whether extra payments or a different plan saves you more
- ✓ Printable one-page action plan — your entire strategy on one sheet
For educational planning only — not financial advice.
How Student Loan Repayment Works (Plans, Interest, and Tradeoffs)
outstanding (2024)
More than $1.77 trillion in student loan debt is held by roughly 45 million Americans. The repayment plan you choose determines your monthly payment, total interest paid, and whether you qualify for forgiveness. Understanding how interest accrues and capitalizes turns a confusing system into a set of manageable decisions.
Interest, Principal, and Why the Balance Can Feel “Stuck”
Student loans accrue interest daily on the outstanding balance. If your payment doesn't fully cover that daily interest—common with income-driven plans on large balances—unpaid interest capitalizes and gets added to your principal. The result: your balance grows even while you're making on-time payments, which is why some borrowers feel like they're making no progress at all.
Student loan interest accrues based on the outstanding principal and rate. Early in repayment, a meaningful portion of each payment may go toward interest, especially with higher balances or rates. This is normal and is why consistency matters.
Repayment Plans Can Change the Real Outcome
Federal student loans offer multiple repayment plans: Standard (10 years, highest payment, least total interest), Graduated (low to high payments), and Income-Driven plans (tied to your income, with forgiveness after 20–25 years). Switching plans changes both your monthly obligation and total cost—sometimes by tens of thousands of dollars over the life of the loan. Run both scenarios before deciding.
Federal and private loans can follow different rules for interest, capitalization, and payment allocation. Some repayment plans lower the required payment but extend the timeline. Always confirm your plan terms and how extra payments are applied.
What to Track Month to Month
Track three numbers each month: your outstanding principal balance, your accrued interest, and how your payment was allocated (interest vs. principal). If your balance is growing despite on-time payments, you're negatively amortizing—a clear signal to consider switching repayment plans or making a voluntary extra payment to stop the principal from compounding against you.
Track your payment amount, principal reduction, and any changes in rate or servicer policy. A simple monthly check-in can keep you consistent and prevent surprises that slow progress.
Go deeper: Student loan payoff strategies — what the calculator shows — How to get out of debt on a low income
Before you leave
Most people pick a repayment plan without knowing what it actually costs them.
The 10-minute Student Loan Planner builds a repayment strategy around your income and timeline — in plain math.
FAQ
Can this calculator handle multiple student loans at once?
The calculator accepts multiple loan entries — you can input each loan separately with its own balance and interest rate, and the tool models the combined payoff timeline across all of them. This matters because most borrowers graduate with a mix of subsidized and unsubsidized federal loans from multiple years, often at different rates, and the total interest picture across all accounts is what determines your actual repayment cost. Entering each loan individually also reveals which one is costing the most in monthly interest, which informs the smartest order for extra payments.
How much total interest will I pay on $35,000 in student loans over 10 years?
On $35,000 in federal undergraduate loans at the 2025–2026 rate of 6.39%, the standard 10-year repayment plan produces a monthly payment of approximately $393 and generates roughly $12,160 in total interest — meaning you repay about $47,160 on a $35,000 loan. Increasing the monthly payment by $150 to $543 compresses payoff from 120 months to approximately 76 months and cuts total interest to about $6,300, a savings of nearly $5,900. The interest is front-loaded: in year one, roughly $2,200 of your payments go to interest and only $2,500 reduces the balance, which is why paying extra in years 1–3 produces disproportionately large long-term savings.
How much faster can I pay off student loans with an extra $150 per month?
On a $35,000 balance at 6.39% APR under the standard 10-year plan, adding $150 per month reduces the timeline from 120 months to approximately 76 months — about 3.7 years sooner. Total interest drops from $12,160 to roughly $6,300, a savings of nearly $5,900. Even $75 extra per month on this loan saves approximately $2,800 in interest and pays it off 21 months early. The reason the savings are so large relative to the extra payment is that early principal reduction removes that balance from the compound interest base for every subsequent month — the effect is cumulative, not linear.
What is the current federal student loan interest rate for 2025–2026?
For the 2025–2026 academic year, federal student loan rates are 6.39% for undergraduate Direct Subsidized and Unsubsidized Loans, 7.94% for graduate Direct Unsubsidized Loans, and 8.94% for Direct PLUS Loans taken by graduate students or parents. These rates are set each July based on the 10-year Treasury note yield plus a fixed add-on set by Congress, meaning they change annually for new loans while existing loans retain the rate at which they were originally disbursed. Private student loan rates vary by lender and credit profile, typically ranging from 4% to 15% depending on whether the rate is fixed or variable.
Why is my student loan balance not going down even though I'm making payments?
For federal loans on income-driven repayment plans, the required monthly payment is calculated as a percentage of discretionary income — not based on what it takes to cover interest. When that payment is less than the monthly interest accruing on the balance, the difference is added back to the principal, causing the balance to grow even with on-time payments. This is called negative amortization, and it's a structural feature of income-driven plans, not a calculation error. On a $50,000 balance at 6.39% APR, monthly interest accrues at roughly $266 — if your income-driven payment is $180, the $86 shortfall adds to your balance each month.
Does refinancing student loans make sense right now?
Refinancing federal student loans into a private loan makes financial sense when you can secure a rate meaningfully below your current federal rate and you don't intend to use income-driven repayment, forgiveness programs, or federal forbearance protections. At current private refinancing rates of roughly 5–9% for well-qualified borrowers, refinancing a 7.94% graduate loan to 5.5% on a $40,000 balance saves approximately $3,200 in interest over 10 years. The permanent trade-off is surrendering federal protections — income-driven repayment enrollment, Public Service Loan Forgiveness eligibility, and the ability to pause payments during hardship. For borrowers in stable, private-sector careers with no intent to pursue forgiveness, the savings are real.
Should I pay off student loans aggressively or enroll in income-driven repayment?
Aggressive payoff wins financially when your loan balance is manageable relative to your income and you won't qualify for meaningful forgiveness — the interest savings from accelerated payoff are real and compounding. Income-driven repayment wins when your balance is large relative to your income, when you work in public service and qualify for PSLF after 120 payments, or when your income is currently low enough that required payments are less than the interest accruing. The practical breakpoint is roughly a balance-to-income ratio above 1.5x: if you borrowed $60,000 and earn $40,000, income-driven repayment is likely the better structural choice; if you borrowed $25,000 and earn $65,000, aggressive payoff eliminates the debt faster than any forgiveness timeline.