The interest rate on your new student loan will determine the cost of the money you’re borrowing from your lender. You’ll repay the interest and the principal amount (how much you borrow), so it’s wise to lock in the lowest interest rate possible.
Are student loans fixed or variable rate? Both options exist, and the right choice depends on your loan type and financial situation. If you’re trying to decide between the two, we’ll walk you through how each works, how they compare, and which might be the better fit for your situation.
Key takeaways
- Federal student loans are always fixed-rate; variable rates are only available through private lenders.
- Fixed rates offer predictable monthly payments, while variable rates typically start lower but can rise over time.
- Variable-rate loans may save you money if rates drop or if you plan to repay quickly, and fixed rates are the safer long-term bet.
- You can’t switch rate types mid-loan, but refinancing lets you move from variable to fixed (or vice versa) if your needs change.
Table of Contents
- Takeaways
- Is a student loan a variable or fixed rate?
- Fixed vs. variable rates at a glance
- How fixed vs. variable rates affect interest and costs
- Compare variable vs. fixed rates
- Is a fixed or variable student loan better?
- Who should choose a fixed rate or a variable rate?
- How do you choose?
- How are fixed and variable rates calculated?
- Who offers fixed-rate loans?
- Who offers variable-rate loans?
- Which student loan rate type do most borrowers choose?
- Can you switch from a variable to a fixed loan later?
- Bottom line
- FAQ
Is a student loan a variable or fixed rate?
When it comes to student loan interest rates, you’ll encounter two types: fixed or variable. Which one you get depends on your lender and loan type.
- Fixed interest rates remain the same for the life of the loan, giving you consistent, predictable payments regardless of market changes.
- Variable interest rates can rise or fall over the course of the loan, typically tied to a benchmark index that fluctuates with broader market conditions.
Fixed vs. variable student loan rates: Key differences at a glance
| Feature | Fixed-rate student loan | Variable-rate student loan |
|---|---|---|
| Interest rate | Stays the same for the life of the loan | Can change over time based on market conditions |
| Monthly payments | Predictable and consistent | May increase or decrease over time |
| Starting interest rate | Typically higher than variable rates | Often lower at the start |
| Overall cost | Easier to estimate total cost upfront | Total cost can vary depending on rate changes |
| Risk level | Lower risk, more stability | Higher risk due to potential rate increases |
| Best for | Borrowers who want stability and long-term predictability | Borrowers who plan to repay quickly or expect rates to drop |
How fixed- vs. variable-rate student loans affect interest and costs
Your loan’s interest rate determines how much the loan will cost you, from disbursement to your final payment. A fixed or variable interest rate can influence the cost and your monthly payment obligation throughout the repayment period.
A fixed interest rate means your rate will not change over the life of the loan. If you’re on a level repayment plan, your monthly student loan payments will generally stay the same, making your repayment costs easier to predict. However, your monthly payment can still change if you use an income-driven, graduated, extended, or other non-level repayment plan, or if your repayment status changes.
A variable interest rate is based on a percentage on top of a benchmark rate; when this rate goes up, so does your interest rate. When this rate goes down, your interest rate is lower. A variable rate is typically based on the prime rate. Some lenders may use a Secured Overnight Financing Rate (SOFR)-based index as a replacement.
How much more (or less) could a variable-rate loan cost you compared to a fixed-rate student loan? Let’s take two five-year student loans, each for $10,000. One loan has a fixed rate of 6.0% APR, while the other has a variable rate of 3.5% + prime (which, in this example, is 2% when the loan is disbursed).
| Fixed rate | Total annual payments | |
|---|---|---|
| Disbursement | 6.0% | $2,316 |
| Year 1 | 6.0% | $2,316 |
| Year 2 | 6.0% | $2,316 |
| Year 3 | 6.0% | $2,316 |
| Year 4 | 6.0% | $2,316 |
| Year 5 | 6.0% | $2,316 |
| Avg. rate | 6.0% | — |
| Total cost | — | $11,580 |
| Variable rate at 3.5+ prime | Total annual payments | |
|---|---|---|
| Disbursement | 5.5% | Varies |
| Year 1 | 7.0% (+1.5%) | $2,273 |
| Year 2 | 4.5% (-1.0%) | $2,238 |
| Year 3 | 7.5% (+2.0%) | $2,308 |
| Year 4 | 6.0% (+0.5%) | $2,273 |
| Year 5 | 4.5% (-1.0%) | $2,238 |
| Avg. rate | 5.83% | — |
| Total cost | — | $11,330 |
As you can see, some years might see lower rates if your APR is variable. In other years, your interest rate might be higher. A variable rate may save you money over a fixed rate, but it’s never guaranteed. Sometimes, a variable rate could increase the amount you pay over time.
Want to see how a fixed or variable student loan could impact your monthly payments and total cost? Use our student loan calculators to estimate your payments and compare scenarios.
How do you compare variable- vs. fixed-rate student loans?
Fixed-rate student loans offer stability and predictable payments for the life of the loan, while variable rates start lower but fluctuate with market conditions. The right choice is a trade-off between certainty and potential savings.
When weighing this decision, students should consider the following:
- If interest rates might drop, a variable-rate loan could be the best money-saving option. When rates are rising, locking in a fixed-rate student loan could be the smarter choice.
- Variable rates allow you to benefit from future rate cuts. Plus, you’ll start your loan off at a lower rate when your balance is at its highest.
- Fixed rates are still the choice for the majority of student and parent borrowers, offering the security of predictable interest payments over the life of the loan.
Is a fixed or variable student loan better?
When comparing fixed and variable rates, one isn’t “better” than the other. Each type of interest rate offers its own benefits and upsides. However, the type of interest rate that is better for you comes down to several important factors.
Consider your repayment strategy when choosing a fixed or variable rate. You should also look at lenders’ quotes to see how much money you can save with each scenario.
Take your personal economic situation into account. If you’re on a tight budget and can’t manage an increasing loan payment, variable rates might not be the right choice.
Here are the pros and cons of each type of rate to help you make an informed decision.
Pros and cons of fixed rates
Pros
- Your rate will stay the same for the lifetime of the loan.
- You’ll typically lock in this rate when you sign your loan agreement, and it won’t change.
- You’ll likely have predictable monthly payments.
- Your fixed rate won’t change. If you’re on a standard level repayment plan, your monthly payment will generally stay the same from month one through the end of repayment. (Other repayment plans, such as income-driven or graduated plans, can still change your monthly payment.)
- You can calculate your loan cost at any time.
- If you ever want to know how much your loan will cost you over its remaining term or how much you’ll have paid over the loan’s lifetime, you can calculate this. Just multiply your monthly loan payment by the term (how many months you have left, etc.).
- You can lock in rates.
- No one can predict what interest rates will do in the coming years. However, if you lock in a low rate, you’ll be safe if interest rates increase.
Cons
- Rates may be higher.
- Fixed rates might be higher than starting variable rates depending on the overall interest rate environment.
- You don’t benefit from rate cuts.
- If you lock in a fixed-rate loan while rates are high, you’re stuck with that rate even if they drop across the board. To lower monthly payments, you’d need to refinance your student loan.
- You may pay more for the total loan.
- Your total interest charges will be higher if you lock in a rate consistently higher than the variable rates for the loan term.
Pros and cons of variable rates
Pros
- Starting rates tend to be lower.
- You might find the same loan has a lower variable interest rate than one with a fixed rate. However, the overall interest-rate environment can influence whether this is the case.
- You can take advantage of rate cuts.
- If interest rates drop over your loan term—sometimes a decade or more—you can reap the benefits with a variable-rate loan. Your variable rate will likely drop along with market rates, saving you interest and reducing your monthly payment obligation.
- Rates can only increase so much
- Most lenders will have a built-in rate cap, limiting how high your APR can increase in the future. Rates might rise, but you can predict the worst-case scenario when you sign your loan.
Cons
- Rate hikes can bite you.
- Variable rates mean your interest rate can climb if the market dictates. As the prime rate and other benchmarks rise, so will your student loan rate. This could mean a higher monthly payment and an increased overall loan cost.
- Payments can be unpredictable.
- Rates can shift monthly, quarterly, or annually and often mean an adjusted monthly payment. This changing payment can be frustrating if you’re on a strict budget or prefer predictable monthly payments.
- It’s hard to tell how much you’ll pay over the lifetime of your loan.
- With a fixed-rate loan, you can calculate on day one how much that loan will cost (assuming you pay it off as agreed). With a variable-rate loan, however, there’s no telling. Depending on how rates change and when, you could pay more or less than you think.
Who should choose a fixed-rate or variable-rate student loan?
Borrowers who want stable, predictable payments should choose a fixed-rate student loan, while borrowers who plan to repay quickly and can handle some payment fluctuation may benefit from a variable rate.
Fixed-rate student loans are best for:
- Long repayment timelines
- Predictable budgets
- Risk-averse borrowers
- Borrowers taking out federal student loans (which are fixed-rate only)
Variable-rate student loans are best for:
- Short repayment timelines
- Flexible budgets
- Borrowers expecting rates to drop
- Borrowers with strong credit who qualify for low starting rates
If neither option feels like a perfect fit right now, refinancing later can give you the flexibility to switch rate types as your financial situation changes.
How do you choose between a fixed or variable student loan?
Choosing between a fixed-rate and variable-rate student loan depends on your financial situation, repayment timeline, and comfort with risk. Use the table below to compare scenarios and see which option may be the better fit for you.
| Factor | Choose a fixed-rate student loan if… | Choose a variable-rate student loan if… |
|---|---|---|
| Repayment timeline | You plan to repay your loan over a long period (e.g., 10+ years) | You plan to pay off your loan quickly (e.g., within a few years) |
| Risk tolerance | You prefer stability and want to avoid payment changes | You’re comfortable with some risk and potential payment increases |
| Interest rate outlook | You expect interest rates to rise or stay high | You expect interest rates to fall over time |
| Monthly budget | You need predictable, consistent payments | You have flexibility in your budget to handle fluctuations |
| Loan type | You’re using federal student loans (fixed rates only) | You’re using private student loans and qualify for low starting rates |
How are fixed and variable rates calculated?
Each lender has a proprietary way of calculating its rates. The rate range depends on the lender’s risk appetite, products, and loan limits. Fixed and variable rates are calculated differently, which is why they’re rarely the same when a lender offers both. Fixed rates might be higher in exchange for predictability and consistency. With variable rates, you could snag a lower rate in exchange for the potential of future rate adjustments.
Your student loan rate depends on personal factors such as your credit history and income, as well as the loan details.
How are fixed rates calculated?
Fixed rates are calculated using government-set benchmark rates for federal loans or a lender’s own market assessment for private loans, with your personal financial profile factoring into both. Once set, your rate stays the same for the life of the loan, regardless of shifts in the economy or broader market conditions.
Because your fixed rate is a snapshot of market conditions at the moment of origination, timing your loan application can make a meaningful difference in the rate you lock in.
- With federal student loans, fixed rates are determined by law, set each year by Congress according to 10-year Treasury Note rates. These fixed rates apply to any federal loans originated (or taken out) that year.
- For private student loan lenders, fixed rates aren’t tied directly to economic conditions or benchmarks. The private lenders set the rates based on their own assessment of market conditions.
Your personal financial details can also affect your fixed loan rates. As a borrower or cosigner, your income, credit history, credit score, and loan term can affect your interest rate.
How are variable rates calculated?
Variable rates are calculated as a premium on top of a benchmark index rate, which means they can rise or fall over time as that benchmark moves.
Variable interest rates are set by the lenders themselves but are based on, and can fluctuate along with, certain federal policies and index rates.
Variable rates are not offered on federal student loans. Private lenders will calculate their variable rates as a premium on top of an index or benchmark rate. This is often the prime rate.
- The prime rate is a benchmark rate used by many banks for lending, and is the base rate posted by at least 70% of the 10 largest U.S. banks. The Federal Reserve doesn’t set the prime rate, but banks often adjust it in response to changes in the federal funds rate.
- LIBOR is a benchmark based on average rates from international banks. It was a financial standard for many years but was “retired” permanently on June 30, 2023, with its final publication.
- Many lenders are turning to SOFR as a viable alternative to LIBOR. SOFR is based on U.S. Treasury securities, and the Federal Reserve Bank of New York publishes it daily.
Banks originate loans with an interest rate a certain percentage above either benchmark; as the benchmark rises or falls, so does the borrower’s rate.
Each private lender has its own processes and criteria for determining overall and individual rates. That’s why the rate range differs from one lender to another. The competitive rates lenders offer to student loan applicants and their cosigners will vary according to their individual factors.
Who offers fixed-rate loans?
Both federal loan servicers and private student loan lenders offer fixed-rate loans, though their reasons and structures differ.
Lenders offer student loans with fixed rates because of market demand and the predictability they offer. These terms guarantee the lender will get a set amount from a borrower each month, and the lender can predict how much it will make over the loan’s lifetime.
Federal student loans always come with standardized fixed rates. All students who take out federal loans in a specific time frame will have the same interest rate, regardless of their credit history. Federal loans also come with borrower protections that private loans don’t offer, though highly qualified borrowers may sometimes find lower advertised rates from private lenders.
This rate can differ depending on what type of federal loan you take out and whether you’re an undergraduate or graduate student.
Here’s a look at current fixed APRs on several of our team’s top-rated student loans:
Students looking to consolidate or refinance their existing loans can also lock in a low fixed APR with many different lenders.
Who offers variable-rate loans?
Private student loan lenders are your only option for variable-rate student loans, as federal loans are exclusively fixed-rate. These might be lower than a lender’s fixed interest rates and have the potential to rise or fall.
Lenders cap the highest interest they can charge on a variable-rate loan. If rates drop, borrowers may find themselves saving money on their interest payments.
Most private student loan lenders offer variable interest rates, but federal loans are only fixed-rate products.
Here’s what you can expect from several top-rated lenders’ variable-APR loans:
If you have student loans to refinance, a variable-rate refinance loan could also be the right choice. Here are several top picks for refinance loans with variable APRs:
Which student loan rate type do most borrowers choose?
Both fixed and variable interest rates have benefits and drawbacks. Depending on your financial situation, one type of interest rate might make more sense.
Most borrowers take out student loans with fixed rates. Almost 91% of student loans are federal, and these are always at fixed rates. Many private loan borrowers also opt for a fixed rate when taking out money for school.
This is likely because the loans are more predictable, with an interest rate that isn’t subject to change over time. Even if rates are higher at origination than variable rates from the same lender, borrowers know how much they owe on their loan, what to budget for their monthly payment, and how much they’ll pay in interest over the loan’s lifetime.
Can you switch from a variable to a fixed loan later?
You can’t switch your rate type mid-loan, but refinancing lets you move from a variable to a fixed rate (or vice versa) if you qualify with a private lender during your repayment term. Keep in mind that refinancing federal loans means giving up access to income-driven repayment plans and loan forgiveness programs.
Done carefully and at the right time, refinancing can also help you consolidate multiple balances into one account and lock in a lower rate, reducing what you pay over the life of the loan. Waiting until you qualify for better terms helps ensure the switch actually saves you money long-term.
Bottom line: Choosing a fixed or variable student loan
Choosing between a variable or fixed rate student loan is a personal decision. The right answer depends on whether you’re applying for private or federal student loans, your credit history, and your preferences. There’s no right or wrong answer, so it’s best to consider and calculate which is best for you.
FAQ: Is a fixed or variable student loan the best option for you?
Is fixed or variable rate better for a student loan?
Fixed rates are the safer choice for long repayment timelines or borrowers who need payment certainty. Variable rates may save you money if you plan to repay quickly or expect rates to drop.
Can I negotiate my student loan interest rate?
Negotiating your student loan interest rate depends on your loan type. Federal rates are set by Congress and can’t be negotiated, but private lenders have some flexibility. Your best options are improving your credit, adding a cosigner, or refinancing.
Why are variable rates lower than fixed rates?
Variable rates are lower than fixed rates because lenders can adjust them over time as market conditions change, which reduces their long-term risk. Fixed rates include a built-in premium for the stability they guarantee, so you pay a bit more upfront for a rate that never changes.
What is the 7-year rule for student loans?
The 7-year rule refers to how long a defaulted student loan stays on your credit report, not loan forgiveness. The debt itself doesn’t disappear after seven years, and you may still owe the balance.
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About our contributors
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Written by Stephanie ColestockStephanie is an experienced personal finance writer with more than a decade of experience as a freelancer.
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Edited by Kristen Barrett, MATKristen Barrett is a managing editor at LendEDU. She lives in Cincinnati, Ohio, with her wife and their pack of senior rescue dogs. She has edited and written personal finance content since 2015.
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Reviewed by Erin Kinkade, CFP®Erin Kinkade, CFP®, ChFC®, works as a financial planner at AAFMAA Wealth Management & Trust. Erin prepares comprehensive financial plans for military veterans and their families.