Student Loan Calculator
Calculate monthly student loan payments for standard, graduated, and extended repayment plans.
Results
Visualization
How It Works
The Student Loan Calculator helps you estimate your monthly payment and total cost of repaying federal student loans under different repayment plans—Standard, Graduated, and Extended. Understanding your potential monthly obligation and total interest paid is crucial for budgeting after graduation and choosing the repayment strategy that best fits your financial situation. This tool is designed for both quick estimates and detailed planning scenarios. Results update instantly as you adjust inputs, making it easy to compare different approaches and understand how each variable affects the outcome. For best accuracy, use precise measurements rather than rough estimates, and consider running multiple scenarios to establish a realistic range of expected results.
The Formula
Variables
- P — Loan Amount — the total principal borrowed, including all federal student loans you're consolidating or repaying
- r — Annual Interest Rate (%) — the fixed or variable interest rate on your loan, typically between 4% and 8% for federal loans
- n — Loan Term (Years) — the timeframe to repay, ranging from 10 years (Standard) to 25 years (Extended)
- Repayment Plan — The strategy you choose: Standard (fixed 10-year payments), Graduated (payments increase over 10 years), or Extended (payments spread over 25 years)
- M — Monthly Payment — the amount you'll pay each month toward your loans
- Total Interest Paid — The cumulative interest accrued over the entire repayment period; longer terms result in higher total interest
Worked Example
Let's say you borrowed $30,000 in federal student loans at a 5.5% annual interest rate. If you choose the Standard Repayment Plan with a 10-year term, your monthly payment would be approximately $317. Over 120 months, you'd pay $38,040 total, meaning $8,040 goes toward interest. However, if you selected the Extended Repayment Plan stretching payments over 25 years, your monthly payment drops to about $142, but you'd pay roughly $42,600 total with $12,600 in interest. The Graduated plan would start around $189 monthly and increase every two years, totaling approximately $40,200. This example shows how choosing a longer repayment period reduces monthly stress but increases the total cost of your education.
Practical Tips
- Consider your expected starting salary before choosing a plan—if you'll earn $35,000+ annually, Standard Repayment saves the most interest; if closer to $25,000, Graduated or Extended might ease cash flow without undue hardship.
- Don't ignore the extra interest cost of longer repayment plans—Extended Repayment could cost you $4,000+ more than Standard, so use it only if necessary for your budget.
- Make extra payments toward principal whenever possible (tax refunds, bonuses, raises), even $50 extra per month can cut years off your repayment timeline and save thousands in interest.
- Review income-driven repayment plans (PAYE, REPAYE, IBR) through your loan servicer if your income is low—these may offer better terms or forgiveness after 20-25 years than Standard, Graduated, or Extended plans.
- Consolidate multiple loans only if you can secure a lower weighted-average interest rate or need the flexibility of a different repayment schedule; consolidation resets your clock and may cost more overall interest.
Frequently Asked Questions
What's the difference between Standard, Graduated, and Extended repayment plans?
Standard Repayment fixes your payment at the same amount for 10 years, paying off the loan fastest and minimizing total interest. Graduated Repayment also takes 10 years but starts with lower payments that increase every two years, helping those expecting salary growth. Extended Repayment stretches payments over 25 years with lower monthly amounts, ideal for tight budgets, but you'll pay significantly more interest over time.
How much will I actually pay in total interest?
Total interest depends on your loan amount, interest rate, and repayment plan duration. For example, a $30,000 loan at 5.5% costs roughly $8,000 in interest over 10 years (Standard) versus $12,600 over 25 years (Extended). Use the calculator to input your specific numbers and compare plans side by side.
Can I change my repayment plan after I start repaying?
Yes, you can switch between Standard, Graduated, and Extended plans through your loan servicer at any time, typically at no cost. This flexibility allows you to adapt as your income changes—move to Extended if you face a job loss, or switch to Standard if you get a raise and want to pay off debt faster.
Will making extra payments help me pay off my loans faster?
Absolutely. Any extra payment you make goes directly toward principal, reducing the balance faster and cutting the total interest you pay. For instance, adding just $100 to your monthly payment could save you $5,000+ in interest and shorten repayment by several years, depending on your loan details.
What happens if I can't afford my monthly payment?
If you're struggling, contact your loan servicer immediately to explore options like deferment, forbearance, or income-driven repayment plans that can reduce or pause payments. Ignoring payments damages credit and leads to default, which has serious consequences including wage garnishment and loss of eligibility for future federal aid.
Sources
- Federal Student Aid — U.S. Department of Education
- Understanding Repayment Plans — StudentAid.gov
- Student Loan Repayment Strategies — Federal Reserve Consumer Resources