APR Calculator
Interest rate and APR (annual percentage rate) aren’t the same thing. The interest rate only tells you what the lender charges on the principal. APR combines fees and shows the full cost as a single yearly percentage, so you can compare two loans on equal terms.
The APR calculator at 15M Finance takes four inputs and returns the APR, the monthly payment, and the total you’ll repay. It can be used to estimate payday loans and other short-term borrowing. It also works for personal loans, auto loans, and mortgages.
| # | Beg. Balance | Payment | Principal | Interest | End Balance |
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How to Use the APR Calculator
Our calculator requires four values:
- Loan amount. The sum you plan to borrow.
- Interest rate. The rate quoted by the lender.
- Loan term. The repayment period in months or years.
- Fees. Origination, underwriting, broker fees, or discount points required at closing.
Press calculate
You’ll see three numbers: the APR (your real yearly cost of borrowing), the monthly payment if you stay on schedule, and the total paid across the full term.
Try to calculate the same loan twice
Enter it once with zero fees, then again with the fees your lender is actually charging. The gap between the two APRs will show what those fees cost on an annualized basis.
What Are the Types of Rates?
U.S. lenders generally offer fixed and variable rate structures for loan products:
Fixed Rate
A fixed rate stays the same for the full repayment period. The APR you sign on day one is the same APR in year five. That’s easier to budget for, which is why most personal loans and short-term loans in the U.S. use fixed pricing. These rates are slightly higher than variable rates at origination because the lender carries the risk of future interest rate changes.
Variable Rate
Variable rates follow a reference index, and the specific benchmark depends on the loan type:
- The common benchmark for consumer loans is the prime rate.
- Mortgages usually use the Secured Overnight Financing Rate (SOFR) as a reference rate. It measures what banks pay to borrow cash overnight against Treasury collateral.
- Credit cards rely on their own internal benchmarks.
Lenders add a margin on top of the index based on your credit profile, so a rate might be quoted as “prime + 4.5%” or “SOFR + 6%”. When the Federal Reserve raises or lowers rates, the index changes, and your payment is recalculated at the next reset date in your loan agreement, typically one or two months later.
Variable rate pricing is common on HELOCs, ARM mortgages, private student loans, and credit cards. It’s rarely applied to payday loans or installment loans under $5,000.
What Is the Difference Between APR and Interest Rate?
The interest rate is the cost of borrowing the principal. The APR combines the interest rate with certain required fees and finance charges. It makes it a better measure of total loan cost.
The interest rate and the APR are usually the same when the loan has no fees. Origination fees, broker charges, or discount points will raise the APR above the stated interest rate.
Let’s look at a $10,000 personal loan at 11% with a $300 origination fee. On paper, it appears to be an 11% loan. The APR reveals the actual cost to be 13.1% once the fee is distributed over the 36-month term.
Credit cards work differently. Their APR usually matches the interest rate because annual fees, late fees, and balance transfer fees are charged separately from the borrowing cost.
The Truth in Lending Act requires lenders to disclose the APR before a borrower signs the loan agreement. This regulation allows consumers to compare offers on a standardized basis rather than relying on headline rates alone.
How Is APR Calculated?
APR is calculated as the full cost of the loan over its term. It includes all interest and eligible fees, origination charges and discount points. Lenders measure those costs against the amount you actually receive after fees, not the face amount of the loan. The APR ends up higher than the stated interest rate when you apply fees.
From there, lenders calculate the annual rate that matches that total cost across the payment schedule. They account for the balance decreasing after each payment, so you can’t calculate the APR on an installment loan by simple division, you should use a calculator instead.
A $5,000 installment loan with a 12% stated rate, repaid over 24 months, and charged a $150 origination fee will result in an APR of about 15.1%.
Payday loan APRs are calculated differently. The charge is usually a flat fee, not interest that builds with the balance, and the term is often two weeks instead of months or years. Lenders turn the fee into a percentage of the amount borrowed, then annualize it based on the loan term.
A $15 fee on a $100 payday loan for 14 days equals 15% over two weeks. Annualized across 365 days, that comes to about 391% APR.
FAQ
What is a good APR?
A good APR depends on the product and the borrower’s credit score. Personal loan APRs range from 6% to 11% for strong credit and 20% to 36% for bad credit. Mortgage APRs usually range from 6% to 8%. Credit card APRs average 16% to 25%. Payday loan APRs may often exceed 300% due to short terms and flat fees.
Is 29.74% APR good?
29.74% is relatively high. Credit cards usually reserve rates at that level for subprime accounts or penalty APRs after missed payments. Personal loans at that rate often point to limited or damaged credit. Borrowers with fair credit or better may often qualify for rates in the 16%-25% range.
How much is 26.99% APR on $3,000?
A $3,000 balance at 26.99% APR will generate about $810 in simple interest over one year. The borrower still owes the $3,000 principal, so total repayment will reach $3,810. A 24-month loan at the same 26.99% APR will require a monthly payment of about $163. Total interest will be $915, and total repayment will be $3,915.
What is the difference between APR and APY?
APY (annual percentage yield) applies to deposit accounts and includes compounding. APR measures the cost of borrowing and does not reflect compounding. A 10% APR with monthly compounding equals a 10.47% APY.
Why can APR be misleading if you repay a loan early?
APR assumes the borrower keeps the loan for the full term. Paying off a 30-year mortgage in year 5 will concentrate the upfront fees into a shorter holding period. It will raise the effective cost above the stated APR. Borrowers planning an early payoff should focus on closing costs and short-term interest instead.
What fees are included in APR?
Most APRs include origination fees, broker fees, discount points, underwriting fees, processing fees, and some closing costs. They usually do not include appraisal charges, title insurance, survey fees, prepaid taxes or insurance, or penalties for late or returned payments. The exact inclusions may vary by lender, so review the loan estimate carefully.