Whether you’re just applying for a student loan or you’re trying to refinance your student loans as a way to pay them off, you’ll often get the choice between a variable vs a fixed interest rate. You might be asking yourself, “what does that mean?”
In this article, we’ll take a look at what variable and fixed rates are, how the interest rates are determined, and the pros and cons of each type of rate. By the end, you’ll be able to determine the best interest rate option for you!
What is a Variable Interest Rate?
Variable interest rates fluctuate over the course of your repayment term. This means that your monthly payments can change on a monthly basis because of the interest rates’ fluctuation. However, the interest rate tends to start a little lower than fixed interest rates, depending on your lender. Private student loans typically have both variable and fixed interest rate options.
What is a Fixed Interest Rate?
A fixed interest rate is simply a rate that doesn’t change. The interest rate you received when you took out the loan will remain the same throughout the span of your repayment period. Federal student loans are fixed.
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How are Interest Rates Determined?
Lenders have a wide range of criteria that they use to determine the variable or fixed rate of your student loans. Each lender is different but this section covers the overall idea of how most determine the rates.
How are Variable Interest Rates Determined?
You might be wondering if a variable interest rate means that a lender will change the interest rate whenever it feels like it. (I know I did.)
The simple answer is no. Variable rates are determined by two things: a fixed margin and a variable index.
A fixed margin is set by your lender based on your ability to pay. They assess this by looking at your creditworthiness as well as the creditworthiness of your cosigner, if you have one. Generally, a higher credit score leads to a lower fixed margin.
The variable index is based on a benchmark in the financial market, specifically the London Interbank Offered Rate (LIBOR). This rate is the average of the interest rates banks charge each other to borrow and lend money. As such, lenders would charge a market rate as well as the LIBOR rate on your student loans on a monthly basis. However, by 2023, LIBOR will be retired and replaced by the Secured Overnight Financing Rate (SOFR). This rate calculates the cost of borrowing cash overnight collateralized by Treasury securities.
For example, let’s say you have a $20,000 student loan with a fixed margin of 4% and an initial variable index of 1.5%, meaning that your overall variable rate is 5.5%. If the LIBOR, or whatever benchmark your lender, uses increases by 1% the following month, your variable interest rate for that month will be 6.5%. However, if that benchmark’s rate decreases by 2% the month after, your variable interest rate for that month will be 4.5%.
How are Fixed Interest Rates Determined?
Similarly to the fixed margin in a variable interest rate, your creditworthiness (as well as your cosigner’s creditworthiness) could determine the fixed rate. Your lender might also have a standard fixed rate for student loan borrowers.
Pros and Cons of Variable Interest Rates
Pros
Variable rates typically starting lower than fixed rates.- With variable interest rates, you could save on interest if the rate doesn't rise too much. Luckily, the LIBOR rates haven’t been on the increase in the last few years.
Cons
Variable interest rates are a gamble since they’re subject to change throughout the repayment period. Since the amount fluctuates, you could find yourself having a bad month in which the variable rate increases heavily. This change can make it difficult to pay. - Variable rates are nearly unpredictable, meaning that your monthly payments will change from month to month. Your monthly payments and total costs will be pretty unpredictable throughout the span of your repayment terms.
Pros and Cons of Fixed Interest Rates
Pros
- Fixed rates are extremely predictable, since the rates are going to stay the same throughout your repayment terms. This quality allows you to plan accordingly for the future with the interest rates in mind.
Cons
- However, variable interest rates could be lower than fixed rates during your loan’s repayment period. Accordingly, you might spend more money than if you had a variable interest rate.
- Fixed interest rates typically start higher than variable rates.
Which is Better?
There’s really no answer for that, since it is ultimately up to you to determine the best option fit for you. Many borrowers might prefer fixed loans because it’s a safer bet and because it will help them budget and plan for the future while they pay for their student loans. However, you might determine that you are in a good position to take on a variable interest rate with the possibility of saving more if the interest rate index is low or remains the same from month to month during your repayment period.
Different factors might weigh into your decision, such as your career path and your financial situation while in college, so it’s important to think about how that will affect you.
>> MORE: Compare student loan interest rates
Student loan rates from our partners
Ascent
Ascent’s undergraduate and graduate student loans are funded by Bank of Lake Mills, or DR Bank, each Member FDIC. Loan products may not be available in certain jurisdictions. Certain restrictions, limitations; and terms and conditions may apply. For Ascent Terms and Conditions please visit: www.AscentFunding.com/Ts&Cs. Rates are effective as of 12/1/2024 and reflect an automatic payment discount of either 0.25% (for credit-based loans) OR 1.00% (for undergraduate outcomes-based loans). Automatic Payment Discount is available if the borrower is enrolled in automatic payments from their personal checking account and the amount is successfully withdrawn from the authorized bank account each month. For Ascent rates and repayment examples please visit: AscentFunding.com/Rates. 1% Cash Back Graduation Reward subject to terms and conditions. Cosigned Credit-Based Loan student must meet certain minimum credit criteria. The minimum score required is subject to change and may depend on the credit score of your cosigner. Lowest rates require full
principal and interest payments, the shortest loan term, a cosigner, and are only available for our most creditworthy applicants and cosigners with the highest average credit scores. Actual APR offered may be higher or lower than the repayment examples above, based on the amount of time you spend in school and any grace period you have before repayment begins.
Ascent’s undergraduate and graduate student loans are funded by Bank of Lake Mills, or DR Bank, each Member FDIC. Loan products may not be available in certain jurisdictions. Certain restrictions, limitations; and terms and conditions may apply. For Ascent Terms and Conditions please visit: www.AscentFunding.com/Ts&Cs. Rates are effective as of 12/1/2024 and reflect an automatic payment discount of either 0.25% (for credit-based loans) OR 1.00% (for undergraduate outcomes-based loans). Automatic Payment Discount is available if the borrower is enrolled in automatic payments from their personal checking account and the amount is successfully withdrawn from the authorized bank account each month. For Ascent rates and repayment examples please visit: AscentFunding.com/Rates. 1% Cash Back Graduation Reward subject to terms and conditions. Cosigned Credit-Based Loan student must meet certain minimum credit criteria. The minimum score required is subject to change and may depend on the credit score of your cosigner. Lowest rates require full
principal and interest payments, the shortest loan term, a cosigner, and are only available for our most creditworthy applicants and cosigners with the highest average credit scores. Actual APR offered may be higher or lower than the repayment examples above, based on the amount of time you spend in school and any grace period you have before repayment begins.
LendKey
1 – Terms and Conditions Apply
Loan products, terms, and benefits may be modified or discontinued by participating lenders at any time without notice. Rates displayed are reserved for the most creditworthy consumers who enroll to make automatic monthly payments. Your initial rate will be determined after a review of your application and credit profile. Variable rates may increase after consummation. You must be either a U.S. citizen or Permanent Resident in an eligible state and from an eligible school, and meet the lender’s credit and income requirements to qualify for a loan. Certain membership requirements (including the opening of a share account, a minimum share account deposit, and the payment of any applicable association fees in connection with membership) may apply in the event that an applicant wishes to apply with, and accept a loan offered from, a credit union lender. If you are not a member of the credit union lender, you may apply and become a member during the loan application process if you meet the lender’s eligibility criteria. Applying with a creditworthy cosigner may result in a better chance of loan approval and/or lower interest rate. Loans for exam preparation classes, including, but not limited to, loans for LSAT, MCAT, GMAT, and GRE preparation, are not available via LendKey.com.
2 – Cosigner Release
Some lenders participating on LendKey.com may offer the benefit of cosigner release. Cosigner release is subject to lender approval. In order to qualify, the borrower, alone, must meet the following requirements: (1) Make the required number of consecutive, on-time full principal and interest payments as indicated in the borrower’s credit agreement during the repayment period (excluding interest-only payments) immediately prior to the request. Any period of forbearance will reset the repayment clock; (2) The account cannot be in delinquent status; (3) The borrower must provide proof of income indicating that he/she meets the income requirements and pass a credit review demonstrating that he/she has a satisfactory credit history and the ability to assume full responsibility of loan repayment; (4) No bankruptcies or foreclosures in the last sixty months; and (5) No loan defaults.
3 – Autopay Rate Reduction
Subject to floor rate and may require the automatic payments be made from a checking or savings account with the lender. The rate reduction will be removed and the rate will be increased by 0.25% upon any cancellation or failed collection attempt of the automatic payment and will be suspended during any period of deferment or forbearance. As a result, during the forbearance or suspension period, and/or if the automatic payment is canceled, any increase will take the form of higher payments.
4 – AutoPay Discount & Lowest Interest Rate
Subject to floor rate and may require the automatic payments be made from a checking or savings account with the lender. The rate reduction will be removed and the rate will be increased by 0.25% upon any cancellation or failed collection attempt of the automatic payment and will be suspended during any period of deferment or forbearance. As a result, during the forbearance or suspension period, and/or if the automatic payment is canceled, any increase will take the form of higher payments. The lowest advertised APR is only available for loan terms of 10 years and is reserved for the highest qualified applicants, taking into consideration the applicant’s credit and other factors.
1 – Terms and Conditions Apply
Loan products, terms, and benefits may be modified or discontinued by participating lenders at any time without notice. Rates displayed are reserved for the most creditworthy consumers who enroll to make automatic monthly payments. Your initial rate will be determined after a review of your application and credit profile. Variable rates may increase after consummation. You must be either a U.S. citizen or Permanent Resident in an eligible state and from an eligible school, and meet the lender’s credit and income requirements to qualify for a loan. Certain membership requirements (including the opening of a share account, a minimum share account deposit, and the payment of any applicable association fees in connection with membership) may apply in the event that an applicant wishes to apply with, and accept a loan offered from, a credit union lender. If you are not a member of the credit union lender, you may apply and become a member during the loan application process if you meet the lender’s eligibility criteria. Applying with a creditworthy cosigner may result in a better chance of loan approval and/or lower interest rate. Loans for exam preparation classes, including, but not limited to, loans for LSAT, MCAT, GMAT, and GRE preparation, are not available via LendKey.com.
2 – Cosigner Release
Some lenders participating on LendKey.com may offer the benefit of cosigner release. Cosigner release is subject to lender approval. In order to qualify, the borrower, alone, must meet the following requirements: (1) Make the required number of consecutive, on-time full principal and interest payments as indicated in the borrower’s credit agreement during the repayment period (excluding interest-only payments) immediately prior to the request. Any period of forbearance will reset the repayment clock; (2) The account cannot be in delinquent status; (3) The borrower must provide proof of income indicating that he/she meets the income requirements and pass a credit review demonstrating that he/she has a satisfactory credit history and the ability to assume full responsibility of loan repayment; (4) No bankruptcies or foreclosures in the last sixty months; and (5) No loan defaults.
3 – Autopay Rate Reduction
Subject to floor rate and may require the automatic payments be made from a checking or savings account with the lender. The rate reduction will be removed and the rate will be increased by 0.25% upon any cancellation or failed collection attempt of the automatic payment and will be suspended during any period of deferment or forbearance. As a result, during the forbearance or suspension period, and/or if the automatic payment is canceled, any increase will take the form of higher payments.
4 – AutoPay Discount & Lowest Interest Rate
Subject to floor rate and may require the automatic payments be made from a checking or savings account with the lender. The rate reduction will be removed and the rate will be increased by 0.25% upon any cancellation or failed collection attempt of the automatic payment and will be suspended during any period of deferment or forbearance. As a result, during the forbearance or suspension period, and/or if the automatic payment is canceled, any increase will take the form of higher payments. The lowest advertised APR is only available for loan terms of 10 years and is reserved for the highest qualified applicants, taking into consideration the applicant’s credit and other factors.
Earnest
Student Loan Origination (Private Student Loan) Interest Rate Disclosure:
Student Loan Origination (Private Student Loan) Interest Rate Disclosure:
College Ave
College Ave Student Loans products are made available through Firstrust Bank, member FDIC, First Citizens Community Bank, member FDIC, or M.Y. Safra Bank, FSB, member FDIC. All loans are subject to individual approval and adherence to underwriting guidelines. Program restrictions, other terms, and conditions apply.
(1) All rates include the auto-pay discount. The 0.25% auto-pay interest rate reduction applies as long as a valid bank account is designated for required monthly payments. If a payment is returned, you will lose this benefit. Variable rates may increase after consummation.
(2) As certified by your school and less any other financial aid you might receive. Minimum $1,000.
(3) This informational repayment example uses typical loan terms for a freshman borrower who selects the Flat Repayment Option with an 8-year repayment term, has a $10,000 loan that is disbursed in one disbursement and a 7.78% fixed Annual Percentage Rate (“APR”): 54 monthly payments of $25 while in school, followed by 96 monthly payments of $176.21 while in the repayment period, for a total amount of payments of $18,266.38. Loans will never have a full principal and interest monthly payment of less than $50. Your actual rates and repayment terms may vary.
Information advertised valid as of 12/2/2024. Variable interest rates may increase after consummation. Approved interest rate will depend on creditworthiness of the applicant(s), lowest advertised rates only available to the most creditworthy applicants and require selection of the Flat Repayment Option with the shortest available loan term.
College Ave Student Loans products are made available through Firstrust Bank, member FDIC, First Citizens Community Bank, member FDIC, or M.Y. Safra Bank, FSB, member FDIC. All loans are subject to individual approval and adherence to underwriting guidelines. Program restrictions, other terms, and conditions apply.
(1) All rates include the auto-pay discount. The 0.25% auto-pay interest rate reduction applies as long as a valid bank account is designated for required monthly payments. If a payment is returned, you will lose this benefit. Variable rates may increase after consummation.
(2) As certified by your school and less any other financial aid you might receive. Minimum $1,000.
(3) This informational repayment example uses typical loan terms for a freshman borrower who selects the Flat Repayment Option with an 8-year repayment term, has a $10,000 loan that is disbursed in one disbursement and a 7.78% fixed Annual Percentage Rate (“APR”): 54 monthly payments of $25 while in school, followed by 96 monthly payments of $176.21 while in the repayment period, for a total amount of payments of $18,266.38. Loans will never have a full principal and interest monthly payment of less than $50. Your actual rates and repayment terms may vary.
Information advertised valid as of 12/2/2024. Variable interest rates may increase after consummation. Approved interest rate will depend on creditworthiness of the applicant(s), lowest advertised rates only available to the most creditworthy applicants and require selection of the Flat Repayment Option with the shortest available loan term.
Final Thoughts
Determining the best interest rate for your student loan is simply up to you and how your finances are looking. After weighing the pros and cons of variable vs fixed interest rates, it will be easier to relate them back to you in deciding what works for you.
You don’t have to make this decision alone. Sparrow’s form allows you to find the best student loans with the best interest rates for you. The platform makes it easy for you to compare real pre-qualified rates without having to apply with lenders one-by-one. Save time by finding the ideal interest rate for you with Sparrow!
Sparrow aims to give you the tools and confidence you need to improve your finances. Many or all of the products featured here are from our partners who compensate us. This may influence which products we write about and where and how the product appears on a page. However, this does not influence our evaluations. Our opinions are our own. While we make an effort to include the best deals available to the general public, we make no warranty that such information represents all available products.