If you’re shopping for student loans in 2026, the interest rate can feel like a moving target. One minute you’re seeing federal rates for the new school year, the next you’re getting private refinance quotes that change daily.
Here’s the big thing to know: federal student loan rates are fixed once you borrow, and they’re set using a formula tied to U.S. Treasury rates. Private loans and refinance rates work differently and can be fixed or variable depending on the lender and your credit profile.
Let’s break down how federal student loan interest rates work in 2026, what “fixed” really means, and when interest starts accruing for the major federal loan types.
How federal loan rates are set
Federal student loan interest rates are set under a 2013 law called the Bipartisan Student Loan Certainty Act. Instead of negotiating a rate per borrower, the rate is the same for everyone who borrows that loan type during the same school year.
Each spring, the government looks at the high yield of the 10-year U.S. Treasury note from the final auction held before June 1. Then it adds a “margin” (an extra percentage amount) that depends on the type of loan:
- Undergraduate Direct Loans (Subsidized and Unsubsidized) use one margin.
- Graduate Direct Unsubsidized Loans use a higher margin.
- Direct PLUS Loans (for parents and grad students) use the highest margin.
The result becomes the interest rate for that loan type for the upcoming school year, usually defined as July 1 through June 30.
Rate changes affect new loans only
If rates are higher (or lower) in 2026, that change applies to new loans first disbursed that school year. Your older federal loans keep the rates they already have. In other words, your federal student loan portfolio can end up with multiple fixed rates, one for each year you borrowed.
Timing note for 2026: Rates for loans first disbursed on or after July 1, 2026 are typically announced after the Treasury auction referenced above, usually in May 2026.
Fixed vs. variable rates
For most people, federal student loans are simple here: they are fixed-rate loans. That means once your loan is disbursed, your rate stays the same for the life of that loan, as long as it remains a federal loan.
So where does “variable” come in?
Variable rates are mainly a private loan and private refinance thing. Some private student loans and many refinance loans offer either:
- Fixed rates (one rate that stays the same), or
- Variable rates (a rate that can change over time based on an index plus a margin).
Federal student loans do not switch between fixed and variable while you hold them. The variability is only in the sense that the federal fixed rate for new borrowers can be different each year.
Subsidized vs. unsubsidized
There’s a common misconception that subsidized loans have a lower interest rate than unsubsidized loans. For undergraduate Direct Loans, the interest rate is typically the same for Subsidized and Unsubsidized loans issued in the same year.
The real difference is who pays the interest during certain periods.
Direct Subsidized Loans
- Interest is paid by the government while you’re enrolled at least half-time.
- Interest is also covered during certain deferments.
- Grace period note: Whether the government covers interest during the 6-month grace period has changed in the past based on federal rules. If you want the definitive answer for your loans, check your promissory note or your servicer account for your specific disbursement dates.
- This can save you a meaningful amount, especially if you borrow early in college and let the balance sit for years.
Direct Unsubsidized Loans
- Interest starts accruing as soon as the loan is disbursed.
- You can choose not to pay interest while in school, but unpaid interest can be added to your balance later through capitalization in certain situations.
If you’re deciding between loan offers or trying to understand your bill, think of it this way: subsidized is “interest-free during protected periods,” unsubsidized is “interest is running right away.”
PLUS loans
Direct PLUS Loans are federal loans available to:
- Parents of dependent undergraduate students (Parent PLUS), and
- Graduate or professional students (Grad PLUS).
PLUS loans typically have higher interest rates than undergraduate Direct Loans. They also come with a loan fee (often called an origination fee) that’s taken out of each disbursement.
Quick clarification: Direct Subsidized and Direct Unsubsidized loans also have loan fees. PLUS loans are not the only federal student loans with fees.
You generally qualify based on not having an adverse credit history, rather than having a high credit score.
Interest on PLUS loans starts accruing as soon as the loan is disbursed.
When interest starts
This is the timeline that trips people up, so here’s the clean version.
- Direct Subsidized (undergrad): Interest does not accrue while you’re in school at least half-time and during eligible deferments. Grace period treatment can vary based on the rules tied to your loan’s disbursement timeframe, so confirm in your account if you want to be 100 percent sure.
- Direct Unsubsidized (undergrad and grad): Interest starts accruing as soon as the loan is disbursed.
- Direct PLUS (Parent PLUS and Grad PLUS): Interest starts accruing as soon as the loan is disbursed.
Deferment vs. forbearance
As a rule of thumb, interest often accrues in forbearance on most federal loans. In deferment, subsidized loans may keep their interest benefit depending on the deferment type and your eligibility.
One concrete example: in an economic hardship deferment, subsidized loans can qualify for the government-paid interest benefit, while in a general forbearance interest typically accrues on subsidized, unsubsidized, and PLUS loans.
If you’re not sure which status you’re in, your loan servicer account will usually spell it out. You can also check your loans and types by logging into your Federal Student Aid account.
Daily interest math
Most student loans use simple interest that accrues daily. A quick estimate looks like this:
Daily interest = (Loan balance × Interest rate) ÷ 365 (typically)
Here are a few easy examples to show what’s going on under the hood.
Example 1: $5,500 at 6.00%
Daily interest = ($5,500 × 0.06) ÷ 365 = $330 ÷ 365 ≈ $0.90 per day
Over 30 days, that’s about $27 in interest, assuming the balance does not change.
Example 2: $20,000 at 7.00%
Daily interest = ($20,000 × 0.07) ÷ 365 = $1,400 ÷ 365 ≈ $3.84 per day
Over a month, that’s roughly $115.
Why this matters
When you make payments, a portion goes to interest first, then the rest reduces principal. If you pay extra, you reduce the balance and the future daily interest that accrues. It is one of the clearest ways to see how small actions can reduce your total cost over time, because it’s math you can track.
Federal vs. private refinance
When you see private refinance quotes, it can feel confusing because the numbers don’t behave the same way federal rates do.
Federal student loan rates
- Set once per year using a Treasury-based formula.
- Same rate for all borrowers for that loan type and school year.
- Fixed for the life of each loan.
- Eligibility is not based on credit score for Direct Loans (though PLUS has a credit check).
Private refinance rates
- Can change daily or even multiple times per day.
- Based on your credit score, income, debt-to-income ratio, and sometimes your degree and employment.
- May be fixed or variable.
- Often depends on term length and whether you choose autopay.
One more big difference: federal loans come with federal protections and repayment options. Refinancing with a private lender generally means you’re replacing a federal loan with a private loan.
That move is typically irreversible, and you can lose access to federal benefits like income-driven repayment and certain deferment and forgiveness pathways. That tradeoff is bigger than the rate itself for a lot of borrowers.
Quick checklist
- Confirm the loan type: Subsidized, Unsubsidized, Grad Unsubsidized, or PLUS.
- Check when interest starts: immediate accrual versus subsidized periods.
- Account for loan fees: Direct Loans and PLUS loans can both have origination fees.
- Estimate your daily interest so you understand the real cost of waiting to pay.
- Remember rates are fixed per loan: a new year can mean a new fixed rate for new disbursements.
- Compare apples to apples: federal borrowing is not priced like private refinance quotes.
- Know common capitalization moments: unpaid interest can capitalize after certain status changes, like leaving a grace period or exiting deferment or forbearance, depending on the loan and program rules.
FAQs
Are federal student loan rates variable in 2026?
No. Federal student loan interest rates are fixed for each loan once it’s disbursed. Rates can change from one school year to the next, but your existing federal loans keep their original fixed rates.
Do subsidized loans have lower rates than unsubsidized?
Not usually. For undergraduate Direct Loans, the rate is typically the same within the same school year. Subsidized loans are better because the government covers interest during certain periods.
When does interest start on federal student loans?
Unsubsidized and PLUS loans start accruing interest as soon as the loan is disbursed. Subsidized loans do not accrue interest while you are enrolled at least half-time and during certain deferments. Grace period treatment can vary based on federal rules tied to disbursement timing, so confirm in your account if you want to be certain.
How can I find my exact interest rate?
Your federal loan interest rates are listed in your loan servicer account and in your Federal Student Aid account. If you have multiple loans from different years, you can have multiple fixed rates.
If you’re feeling overwhelmed by all the moving pieces, you’re not alone. The fastest way to calm the noise is to get specific: list each loan, its rate, and whether interest is currently accruing. Money stress hates a spreadsheet.