5 Practical Ways to Stop Federal Student Loan Interest From Piling Up

If you’re a parent of a college student in the US, you’ve probably heard some version of this: “You don’t have to pay back student loans while you’re still in school.” That’s true — no bill shows up in the mailbox. But interest doesn’t wait for graduation. It accrues every single day, and if nobody is watching it, a student can walk across the graduation stage owing thousands of dollars more than what was actually borrowed.

Federal loan repayment options have been through a lot of change recently, especially with the SAVE Plan and other income-driven repayment plans tied up in court challenges and policy shifts. If your loan is simply sitting on the standard 10-year Standard Repayment Plan, you don’t need to panic every time a new plan is announced in the news. What actually moves the needle for most families are a handful of practical habits that work no matter which repayment plan is in place. Here they are, split into what current students should do and what graduates should do.

For Current Students: A Bill Not Arriving Doesn’t Mean the Loan Isn’t Growing

1. Find Out Exactly What Kind of Loan You Have

Federal student loans generally fall into two categories: Direct Subsidized Loans and Direct Unsubsidized Loans. Not knowing the difference between them can cost a family thousands of dollars down the road.

With a Subsidized Loan, the US Department of Education covers the interest that accrues while the student is enrolled at least half-time, so nothing gets added to the balance before graduation. An Unsubsidized Loan works differently: interest starts accruing the moment the funds are disbursed to the school, and it keeps accruing every day, through summer break, winter break, and every weekend in between.

How to check: log into StudentAid.gov. The dashboard lists every federal loan a student has taken out, including the loan type, balance, and interest rate. It takes about five minutes. Sit down with your son or daughter and pull this up together, today if possible.

2. Pay Down the Interest While Still in School — This Is the Single Most Important Habit

This is the step most families skip, and it’s the one that matters most. When repayment finally begins after graduation, any interest that built up while the student was enrolled gets added to the original loan amount. This process is called capitalization. Once it happens, the loan balance is permanently higher, and future interest is then calculated on that larger number, meaning the borrower ends up paying interest on interest.

Here’s what that looks like with real numbers. Say a student borrows $5,500 a year in Direct Unsubsidized Loans for four years, for a total of $22,000, at an interest rate of 6.53%.

If nothing is paid during those four years, roughly $4,800 in interest builds up before graduation. That means repayment doesn’t start at $22,000, it starts at closer to $26,800. Spread over the standard 10-year repayment plan, the total amount repaid ends up above $36,000.

Now compare that to a student who pays just the interest each month while in school, something in the range of $50 to $80 a month. At graduation, the loan balance is still exactly $22,000, and the total repaid over 10 years drops to roughly $29,700. Even after adding back the in-school interest payments, the family still comes out $4,000 to $6,000 ahead.

How to do it: have the student set aside part of a paycheck from a part-time job or a portion of their allowance, log into the loan servicer’s website each month, and manually pay the amount listed as “accrued interest.” Since this only covers interest and not principal, the monthly amount is manageable for most students.

For Graduates: One Small Setting Can Meaningfully Lower the Total Cost

1. Turn On Autopay for an Instant 0.25% Rate Reduction

This is the easiest win available, and it takes about two minutes. Enrolling in automatic payments through the loan servicer’s website triggers an automatic 0.25 percentage point reduction in the interest rate on federal loans.

A quarter of a percent might not sound like much, but the dollar impact is real. On a $30,000 balance at 6.53%, autopay brings the rate down to 6.28%. Over a standard 10-year term, that adds up to roughly $400 to $500 in interest saved, for setting up something that also protects the borrower from ever missing a due date.

2. When Making Extra Payments, Always Select “Principal Only”

Sending extra money to a loan servicer without specifying how it should be applied often accomplishes very little. Many servicers default to treating an extra payment as a prepayment of the next month’s bill, which just pushes the next due date back rather than reducing how much interest accrues.

The fix: whenever an extra payment is made, look for the payment option that lets the borrower direct funds specifically toward the principal balance. Wording varies by servicer, so check the payment screen carefully or call customer service to confirm before submitting the payment.

Why this matters: interest on federal loans is calculated daily based on the outstanding principal balance. Lowering the principal lowers the interest that accrues starting the very next day. As a rough rule of thumb, every $1,000 knocked off the principal saves about $65 a year in interest at a 6.53% rate. Making extra principal-only payments consistently is the fastest way to bring down total interest costs.

Here’s a real-world comparison. A borrower with a $30,000 balance at 6.53% on the standard 10-year plan has a base monthly payment of around $340.

Adding just $100 a month as a principal-only extra payment shortens the repayment timeline from 10 years to about 7 years and 4 months, and saves roughly $3,200 in total interest. That’s a couple of years of skipped coffee runs in exchange for finishing repayment nearly three years early and coming out over $3,000 ahead.

3. Don’t Forget Form 1098-E at Tax Time

Interest paid on federal student loans during the year can qualify for a deduction of up to $2,500 on a federal tax return. The exact amount depends on income, but most borrowers early in their career, when income is still relatively modest, can claim at least part of this deduction.

Loan servicers typically issue Form 1098-E in January or February, either by mail or as a download from the servicer’s website. This form gets handed to a tax preparer or entered directly into tax software such as TurboTax.

What’s it actually worth? For someone in the 22% federal tax bracket, a full $2,500 deduction translates into roughly $550 back at tax time, money that’s easy to leave on the table simply by forgetting to download one form. Make checking for Form 1098-E a fixed part of your tax season checklist every year.

Quick Action Checklist

If you’re currently enrolled: log into StudentAid.gov today, confirm whether you have any Unsubsidized Loans, and if so, start paying the accrued interest starting this month.

If you’ve already graduated: confirm that autopay is turned on, and double-check that any extra payment you make is being applied as “principal only” rather than as a prepayment.

Every year, without fail: download Form 1098-E as soon as your servicer makes it available and pass it along to whoever prepares your taxes.

The real cost of a student loan isn’t decided the day it’s borrowed, it’s decided by how it’s managed during repayment. Two students can borrow the exact same amount and end up thousands of dollars, and sometimes years, apart in what they actually pay back. What you do with this information now is what makes that difference later.

Sources: U.S. Department of Education – Federal Student Aid (StudentAid.gov); IRS Publication 970, Tax Benefits for Education; College Board, 2024–2025 Student Aid Report.