Student Loan Calculator

Calculate your monthly student loan payment, total interest, and years to payoff. Explore repayment options to find the best strategy for your situation.

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Federal vs. Private Student Loans: What You Need to Know

Student loan debt in the United States exceeds $1.7 trillion, making it the second-largest category of consumer debt. Understanding the difference between federal and private loans — and which repayment strategy works best for you — can save tens of thousands of dollars over the life of your loans.

Federal Student Loans

Federal loans come with protections private loans don't offer: income-driven repayment plans, deferment and forbearance options, Public Service Loan Forgiveness (PSLF), and fixed interest rates set by Congress each year. Direct Subsidized Loans (for undergrads with financial need) don't accrue interest while you're in school. Direct Unsubsidized Loans accrue interest immediately — during school, grace periods, and deferment. That accumulated interest capitalizes (is added to principal) when repayment begins, increasing your effective loan balance.

Income-Driven Repayment Plans

If the standard 10-year payment is unmanageable, federal borrowers can switch to an income-driven repayment (IDR) plan. These cap monthly payments at 5–20% of discretionary income, extending repayment to 20–25 years. Any remaining balance is forgiven at the end (though forgiven amounts may be taxable). SAVE (Saving on a Valuable Education) is the newest plan and the most generous — payments can be as low as $0 for very low incomes.

Public Service Loan Forgiveness (PSLF)

If you work full-time for a qualifying non-profit or government employer, PSLF forgives remaining federal loan balances after 120 qualifying payments (10 years) on an IDR plan. Unlike IDR forgiveness, PSLF forgiveness is tax-free. Doctors, nurses, teachers, social workers, and government employees are common beneficiaries. The key is to certify employment annually and ensure you're on a qualifying repayment plan.

Refinancing Student Loans

Refinancing replaces your existing loans with a new private loan at (ideally) a lower interest rate. If you have strong credit, stable income, and private loans at high rates, refinancing can save significant interest. However, refinancing federal loans into a private loan permanently eliminates access to federal protections — IDR plans, PSLF, and federal forbearance options. Never refinance federal loans unless you're confident you won't need those protections.

Frequently Asked Questions

What happens to interest during my 6-month grace period?
For Unsubsidized and PLUS loans, interest continues to accrue during your grace period. At the end of the grace period, that interest capitalizes — it's added to your principal balance — meaning you pay interest on your interest going forward. Making interest-only payments during the grace period prevents capitalization and saves money long-term.
Should I pay off student loans early or invest?
It depends on your interest rate. Federal student loan rates typically range from 5–8%. If your loan rate is below 6–7%, historical stock market returns (averaging ~10% annually) suggest investing may generate better long-term returns. If your rate is above 7%, paying off loans first is often the safer, higher-return choice. Either way, always capture any employer 401(k) match first — that's an instant 50–100% return.
What is the difference between deferment and forbearance?
Both temporarily pause required loan payments. Deferment is typically granted for specific circumstances (returning to school, economic hardship, military service) and subsidized loans don't accrue interest during deferment. Forbearance is broader but interest always accrues — even on subsidized loans. Both are preferable to default but should be used sparingly since interest accumulation can significantly increase your balance.
Can I deduct student loan interest on my taxes?
Yes, if your income qualifies. You can deduct up to $2,500 in student loan interest paid per year. The deduction phases out at higher income levels (the phase-out begins around $75,000 for single filers and $155,000 for joint filers as of recent years). You don't need to itemize — it's an "above-the-line" deduction that reduces your adjusted gross income directly.
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