Student Loan Calculator
Payment & Payoff Estimator

Monthly student loan payment is calculated using the standard amortization formula: M = P × [r(1+r)^n] / [(1+r)^n - 1], where P = loan principal, r = monthly interest rate (annual rate ÷ 12), n = total number of payments. Example: $35,000 loan at 6.54% for 10 years: r = 0.00545, n = 120. M = $35,000 × [0.00545 × 1.00545^120] / [1.00545^120 - 1] ≈ $396/month.

For the 2024-25 academic year, federal student loan interest rates are: Direct Subsidized & Unsubsidized Loans (undergraduate): 6.53%, Direct Unsubsidized Loans (graduate/professional): 8.08%, Direct PLUS Loans (parents and graduate/professional): 9.08%. These rates are fixed for the life of the loan and are set annually by Congress based on the 10-year Treasury note yield.

Income-Based Repayment (IBR) is a federal student loan repayment plan that caps monthly payments at 10% of your discretionary income (income above 150% of the federal poverty line). For example, with a $50,000 annual income and federal poverty line of $14,580: Discretionary income = $50,000 - ($14,580 × 1.5) = $28,130. IBR payment = $28,130 × 10% ÷ 12 = $234/month. After 20 years (25 for grad loans) of qualifying payments, remaining balances are forgiven. Note: The SAVE plan (successor to REPAYE) is now the most generous plan, capping payments at 5% for undergraduate loans.

To pay off student loans faster: (1) Make extra payments — any amount above the minimum goes directly to principal. Even $50–$100 extra per month can save thousands in interest and years of payments. (2) Use the debt avalanche method (pay highest interest loans first) or Dave Ramsey's debt snowball (pay smallest balances first for psychological wins). (3) Refinance to a lower interest rate if you have good credit and stable income. (4) Use windfalls (tax refunds, bonuses) for lump-sum payments. (5) Consider biweekly instead of monthly payments (26 half-payments = 13 full payments per year).

Public Service Loan Forgiveness (PSLF) forgives remaining federal student loan balances after 120 qualifying monthly payments (10 years) while working full-time for a qualifying employer (government agencies, 501(c)(3) nonprofits). To qualify: loans must be Direct Loans, you must be on an income-driven repayment plan, and employer must be a qualifying public service organization. Use the PSLF Help Tool on studentaid.gov to check employer eligibility. PSLF is tax-free forgiveness.

Student loan refinancing can make sense if: (1) You have private loans with high interest rates and good credit to qualify for a lower rate. (2) You have federal loans but do not plan to pursue PSLF or income-driven forgiveness. (3) You have stable income and will not need income-driven repayment protection. Caution: Refinancing federal loans with a private lender permanently converts them to private loans, losing access to IBR, PSLF, deferment, forbearance, and COVID/SAVE protections. Only refinance federal loans if you are confident you will not need these protections.

Dave Ramsey recommends the debt snowball method for student loans: (1) List all student loans from smallest balance to largest (ignore interest rates). (2) Make minimum payments on all loans. (3) Put every extra dollar toward the smallest loan. (4) When smallest is paid off, roll that payment to the next smallest. (5) Repeat until debt-free. Ramsey also advocates against income-driven repayment plans and loan forgiveness programs, preferring aggressively paying off all debt as quickly as possible. He recommends earning more income (side hustles) and cutting expenses to accelerate payoff.