Student Loan Calculator

• The Standard Repayment Plan spreads payments evenly over 10 years — highest monthly cost but lowest total interest.
• The Graduated Plan starts low and increases every two years, suitable for borrowers expecting rising income.
• Extended Repayment stretches to 25 years for loans over $30,000, cutting monthly payments by 40% but roughly doubling total interest.
• Income-Driven Repayment (IDR) plans — SAVE (formerly REPAYE), PAYE, IBR, and ICR — cap payments at 5-20% of discretionary income with forgiveness after 20-25 years.

The SAVE plan offers the most generous terms: 5% of discretionary income for undergraduate loans with forgiveness after 20 years.

However, forgiven amounts under IDR plans are currently treated as taxable income (except under PSLF), creating a potential tax bomb at forgiveness.

Even small extra payments dramatically reduce student loan costs.

• On a $35,000 loan at 5.5% over 10 years (standard plan), adding just $50 per month saves $1,804 in interest and pays off the loan 14 months early.
• Adding $100 per month saves $3,189 and finishes 25 months ahead of schedule.

The key is directing extra payments to the highest-rate loan first (avalanche method) rather than the smallest balance (snowball method) — mathematically, the avalanche method always saves more interest, though the snowball method provides psychological wins; a dedicated debt payoff calculator lets you test either order across all your balances before you commit.

If you have both subsidized (government pays interest during deferment) and unsubsidized loans, prioritize extra payments toward unsubsidized loans where interest accrues from day one.

Private refinancing can significantly reduce interest rates — borrowers with strong credit (720+) and stable income may qualify for rates of 3-5%, compared to federal rates of 5-7%. On $50,000 of debt, refinancing from 6.5% to 4% saves approximately $7,500 over 10 years.

However, refinancing federal loans into private loans permanently forfeits federal protections:

• income-driven repayment options
• Public Service Loan Forgiveness (PSLF)
• deferment and forbearance rights
• the interest subsidy on subsidized loans

This tradeoff makes refinancing risky for borrowers in public service careers (PSLF forgives remaining balance after 120 payments), those with unstable income, or those who might need payment flexibility.

A middle ground: refinance private loans aggressively while keeping federal loans in the federal system.

The Standard Repayment Plan amortizes your balance over 10 years (120 months) with a fixed monthly payment using the same amortization math as a mortgage calculator: M = P × r(1+r)ⁿ / ((1+r)ⁿ − 1).

A $30,000 balance at a 6.5% interest rate over 120 months works out to about $340.64 per month and roughly $10,877 in total interest.

Federal loan interest is set by law each year, and income-driven plans replace this fixed payment with one based on your income instead.

Federal student loans, made through the US Department of Education's Federal Student Aid, offer fixed rates set by Congress plus borrower protections — income-driven repayment, deferment, and forgiveness — that private loans generally lack.

Private loans from banks or lenders may offer lower rates to borrowers with strong credit or a cosigner, but without federal safeguards.

Exhaust federal options first; use private loans only to fill a remaining gap.

Income-driven repayment plans cap your monthly federal loan payment at a percentage of discretionary income and extend the term, with any remaining balance forgiven after 20-25 years (or 10 for public service).

According to Federal Student Aid, IDR plans can dramatically lower payments for borrowers with high balances relative to income.

The trade-off is more interest over a longer term, though forgiveness can offset it.

Federal student loan interest rates are fixed for the life of each loan and set annually by Congress, tied to the 10-year Treasury note yield, so loans disbursed in different years carry different rates.

Because they are fixed, your rate never changes once you borrow. This differs from private loans, which may be variable.

Check the current-year rates on the Federal Student Aid site before borrowing, as they reset each July.

Two main federal forgiveness paths exist.

• Public Service Loan Forgiveness (PSLF) cancels the remaining balance after 120 qualifying payments while working full-time for government or a nonprofit.
• IDR forgiveness cancels the balance after 20-25 years of income-driven payments.

Both require federal loans and specific qualifying conditions tracked by Federal Student Aid.

Refinancing federal loans into a private loan permanently forfeits eligibility for these programs.

Federal loans typically include a six-month grace period after you leave school before payments begin.

If you later struggle, deferment and forbearance can pause payments temporarily — but interest usually keeps accruing (always on unsubsidized loans), enlarging the balance.

Federal Student Aid treats these as short-term relief, not a solution; income-driven repayment is usually a better long-term option than repeatedly pausing payments.

Refinancing replaces your loans with a new private loan, ideally at a lower rate. For high-credit borrowers with private loans, it can save real money.

But refinancing FEDERAL loans into a private loan permanently gives up income-driven repayment, forgiveness (including PSLF), and federal deferment protections.

The CFPB advises weighing those lost benefits carefully — a slightly lower rate rarely justifies surrendering federal safeguards if there's any chance you'll need them.

Common mistakes include:

• refinancing federal loans away and losing forgiveness and IDR
• choosing an unnecessarily long term and overpaying interest
• using forbearance repeatedly while interest compounds
• not certifying income annually for IDR plans

Borrowers also ignore PSLF eligibility.

Understand your federal protections before refinancing, recertify IDR on time, pay extra toward principal when possible, and check whether your job qualifies for forgiveness.