Mar 31, 2026

How Does Interest Work on a Personal Loan?

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Interest on a personal loan is generally fixed. What does this mean? You'll have equal monthly payments. You'll also need to factor in the amount of interest you owe on top of the funds you borrow, which you'll need to make until the loan is paid off.

Your personal loan annual percentage rate (APR) includes both the interest rate you'll be charged to borrow money and any additional fees, so it represents the total cost of borrowing from a lender. Your exact APR will be determined by your credit score, with higher scores qualifying for lower rates.


MoneyLion offers a service to help you find personal loan offers. Based on the information you provide, you can get matched with offers for up to $100,000 from our top providers. You can compare rates, terms, and fees from different lenders and choose the best offer for you.


Although fixed-rates loans are the most common, variable-rate loans are also available. With these, your interest rate can rise or fall as overall interests change, such as those influenced by the Federal Reserve.

Here's a side-by-side look at how fixed and variable interest rates compare:

Loan Type

How It Works

Pros

Cons

Fixed rate

Interest stays the same for the life of the loan

-Predictable payments

-Better option for longer-term loans

Less flexibility if rates fall

Variable rate

Interest can go up or down with market rates

-Lower starting rate

-Could be a good option for shorter-term loans

Payments may increase over time

There are a few different ways to calculate interest on a loan, but most personal loans use simple interest.

Simple interest is calculated with this basic formula:

Interest = Principal x Interest Rate x Time

There's a difference between interest rate and APR.

APR is a more accurate picture of how much you'll pay to borrow money, because it includes both your interest rates and any other fees, such as loan origination fees.

Here's a look at how simple interest would work on a personal loan:

  • Your loan is $10,000.

  • The APR is 10%.

  • It's a 3-year term.

According to the formula, the simple interest calculation would be ($10,000 x 0.10 x 3), suggesting that the interest would be $3,000.

This means you'd pay $3,000 to borrow the $10,000, for a total repayment amount of $13,000.

An important note: With a simple interest loan, you only pay interest on the outstanding principal balance of your loan.

  • Your balance will decrease with every monthly payment you make.

  • The simple interest calculation will change as you pay off more of the loan.

This means you'd pay less than the original $3,000 calculated above to borrow $10,000, with the exact amount depending on the size and the frequency of your loan payments.

Here's what you should expect in the different credit score ranges:

  • Excellent credit: 6% to 10% APR

  • Average credit: 11% to 20% APR

  • Poor credit: 20% and above APR

You can evaluate whether you're getting a good APR on your personal loan by knowing what the average rates look like for different credit buckets.

Your credit score is the biggest factor in determining the personal loan interest rate you qualify for, as it represents your credit risk and the likelihood that you'll pay the loan back on time.

Other factors figure into your interest rate as well, including:

  • Your income

  • Employment status

  • The amount of money you're borrowing

  • Lender type

  • The length of the loan term, with lower amounts and shorter terms qualifying for lower rates than larger amounts and longer terms.

Credit unions tend to offer lower rates, especially to those with middling credit, compared to traditional banks.

All interest rates are influenced by the larger market and economic environment and shift based on the Federal Reserve's target federal funds rate. This means that average loan rates can look quite different on a yearly or even a monthly basis.

According to the Federal Reserve Bank of St. Louis (FRED), the average personal loan rate on a 24-month loan from a bank is 11.65% APR, as of Nov. 2025. This is considered an average, however, and rates vary by lender and loan type, so always shop around.

The best thing you can do is improve your credit score if you want to get the personal loan interest rate. Taking out a loan and making on-time payments can improve your credit in the long run. You should also check your credit report for any errors and aim to keep your card usage low.

To get the lowest rate, you can also look at shorter loan terms and consider applying with a co-signer who has a strong credit score. Choosing a secured personal loan can get you a lower rate as well, as this type of loan requires collateral up front, which makes the transaction less risky for the lender.

Don't forget to compare offers from multiple lenders. This is the best way to secure the lowest rate possible.

Personal loans can be fixed-rate or variable, but fixed-rate loans are much more common.

Your loan APR will depend on your credit score. If you have a good credit score, search around for an APR between 11% to 17%, with excellent scores qualifying for lower rates and lower scores generally qualifying for higher ones.

Your best bet for negotiating the interest rate on a personal loan is shopping around and comparing offers from multiple lenders.

Yes, prepaying your loan can help you save on interest because you'll only pay interest on the outstanding balance of your loan, so the more you pay off, the less you will owe. However, some lenders have prepayment fees that will penalize you for making extra loan payments.

A loan's APR is higher than the interest rate because it includes both the interest rate and any additional fees you owe, such as a loan origination fee.

Sources

Photo Credit: VorDa / Getty Images


Sarah Silbert
Written by
Sarah Silbert
Sarah Silbert is a writer, editor and credit card expert who has covered personal finance and travel for various publications. Most recently, she was the deputy editor of personal finance coverage at Business Insider, and previously contributed to Forbes, Fortune, The Points Guy and the MIT Technology Review, among others. Sarah loves using credit card rewards to fund trips to her favorite destinations, including Japan, Europe and Hawaii.
Melanie Grafil, CFHC™
Edited by
Melanie Grafil, CFHC™
Melanie is a NACCC Certified Financial Health Counselor™, writer, editor and banking and personal finance expert. She brings over a decade of experience in SEO, editing and content writing. Prior to joining, she was a writer and SEO manager at an internet marketing agency, where she learned the importance of high-quality content optimized for SEO best practices. Melanie holds a Financial Health Counselor Certification™, accredited by the National Association of Certified Credit Counselors (NACCC). An avid fiction writer, she has been published in The Northridge Review, where she had also served as co-head editor, and Tayo Literary Magazine.

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