Should I use the snowball or avalanche method for student loans?

The avalanche method (pay highest interest rate first) saves the most money on total interest. The snowball method (pay smallest balance first) provides psychological momentum that helps some borrowers stay motivated. Mathematically, avalanche wins. Behaviorally, snowball works if it keeps you on track. Use this calculator to compare scenarios and choose the approach you can sustain long-term.

Should I refinance my student loans?

Refinancing can lower your interest rate if you have good credit (700+) and stable income, potentially saving thousands. However, refinancing federal loans with a private lender means losing access to IDR plans, PSLF, loan forgiveness, deferment, and forbearance. Only refinance federal loans if you're certain you won't need those protections. Use [Bankrate](https://bankrate.com/student-loans/refinance/) to compare rates from multiple lenders.

What is income-driven repayment (IDR)?

IDR plans cap your monthly payment at 10-20% of your discretionary income and forgive any remaining balance after 20-25 years. Types include SAVE, PAYE, REPAYE, and IBR. Payments can be as low as $0 if your income is low enough. However, forgiven amounts may be taxed as income. IDR is ideal for borrowers with high debt relative to income or those pursuing PSLF.

How does Public Service Loan Forgiveness work?

PSLF forgives the remaining balance on federal Direct Loans after 120 qualifying monthly payments (10 years) while working full-time for a qualifying employer (government, non-profit, or certain other public service organizations). Only payments made under an IDR plan and on time count. Submit the PSLF Employment Certification form annually to track progress. The PSLF program has been reformed to make it easier to qualify.

What happens if I can't afford my student loan payments?

Options include: switching to an IDR plan (lowers payments), requesting deferment or forbearance (temporarily pause payments, but interest may still accrue), consolidating loans (extends term, lowers payment, but may increase total interest), or loan rehabilitation (for defaulted loans). Never ignore student loans - default has serious consequences including wage garnishment and tax refund seizure.

How does paying extra each month affect my loans?

Additional payments go directly to principal after covering accrued interest, which reduces the total interest charged and shortens the payoff timeline. For example, paying $100 extra per month on a $35K loan at 5.5% saves approximately $3,100 in interest and cuts 3 years off the repayment period. Always specify that extra payments should be applied to the principal balance.

Can I deduct student loan interest on my taxes?

You can deduct up to $2,500 in student loan interest paid per year as an above-the-line adjustment to income (no need to itemize). The deduction phases out at higher income levels (2025: $75K single, $155K married filing jointly). This reduces your taxable income, not your tax bill directly. Your lender will send you Form 1098-E showing the interest paid.

What is the difference between subsidized and unsubsidized loans?

Subsidized loans (undergraduate only) don't accrue interest while you're in school at least half-time, during the 6-month grace period, or during deferment. The government pays the interest. Unsubsidized loans (undergraduate and graduate) accrue interest from the date of disbursement. Unpaid interest capitalizes (adds to principal) when entering repayment. Prioritize subsidized loans first if you need to borrow.

学生ローン返済計算機

学生ローンの返済期間と総支払利息を計算し、スノーボール vs アバランチ戦略を比較します。