Student Loan Calculator — Repayment Estimator

What is Student Loan Calculator?

A student loan calculator helps borrowers estimate their monthly payment obligations and total repayment costs for educational debt. With the average student loan debt in the United States exceeding $37,000 for bachelor's degree graduates and total national student loan debt surpassing $1.77 trillion, understanding your repayment options is more important than ever.

Student loans in the US fall into two main categories: federal student loans (Direct Subsidized, Direct Unsubsidized, PLUS loans) and private student loans from banks and other lenders. Federal loans generally offer lower interest rates, flexible repayment plans, and borrower protections that private loans don't provide.

The standard repayment plan for federal student loans is a fixed monthly payment over 10 years. The formula is the same as any amortizing loan: M = P[r(1+r)^n] / [(1+r)^n - 1], where M is monthly payment, P is principal, r is monthly interest rate, and n is total number of payments.

However, several alternative repayment plans exist for federal loans:

• Income-Driven Repayment (IDR): Payments based on 10-20% of discretionary income
• SAVE Plan: The newest IDR plan with the most generous terms
• Graduated Repayment: Payments start low and increase every 2 years
• Extended Repayment: Fixed or graduated payments over 25 years

The income-driven estimate shown by this calculator approximates 70% of the standard payment as a rough guideline. Your actual IDR payment depends on your income, family size, and which plan you choose.

Key considerations for student loan borrowers include Public Service Loan Forgiveness (PSLF) for those working in government or non-profit sectors (remaining balance forgiven after 120 qualifying payments), employer student loan repayment assistance programs, refinancing options (but be cautious about refinancing federal loans to private, as you lose federal protections), and the tax implications of student loan interest deductions (up to $2,500 per year).

Current federal student loan interest rates (2024-2025) are set annually: Direct Subsidized and Unsubsidized loans for undergraduates are around 5.50%, while Direct Unsubsidized loans for graduate students and PLUS loans carry higher rates. Private loan rates vary widely based on creditworthiness.

How to Use

1. Enter your total student loan balance
2. Enter the interest rate on your loan(s)
3. Enter the repayment period in years (standard is 10 years)
4. Click Calculate to see your payment estimates

If you have multiple loans at different rates, you can either enter each separately or use the weighted average interest rate for an overall estimate.

Examples

Example 1: Average Bachelor's Degree Debt

$35,000 at 5.5% over 10 years: Monthly payment $379.66, total interest $10,559, total paid $45,559.

Example 2: Extended Repayment

$35,000 at 5.5% over 25 years: Monthly payment $215.31, total interest $29,592, total paid $64,592. Lower payment but $19,033 more in interest.

Example 3: Graduate School Debt

$80,000 at 6.5% over 10 years: Monthly payment $908.35, total interest $29,002, total paid $109,002.

FAQ

What's the difference between subsidized and unsubsidized loans?

Subsidized loans don't accrue interest while you're in school or during deferment — the government pays the interest. Unsubsidized loans accrue interest from the day of disbursement, which capitalizes (adds to principal) when repayment begins.

Should I refinance my student loans?

Refinancing can lower your interest rate, but if you have federal loans, you'll lose access to income-driven repayment plans, PSLF, and federal forbearance/deferment options. Only refinance federal loans if you're confident you won't need these protections.

What is Public Service Loan Forgiveness (PSLF)?

PSLF forgives remaining federal Direct Loan balance after 120 qualifying monthly payments (10 years) while working full-time for a qualifying employer (government or 501(c)(3) non-profit). The forgiven amount is tax-free.

How much of my income should go to student loan payments?

Financial experts recommend keeping total student loan payments below 10-15% of your gross monthly income. If your standard payment exceeds this, consider an income-driven repayment plan.

Can student loans be discharged in bankruptcy?

While difficult, it's not impossible. You must prove 'undue hardship' through an adversary proceeding. Recent legal developments have made this slightly more accessible, but it remains challenging.

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