What APR tells you
The annual percentage rate (APR) expresses the cost of borrowing as a yearly rate. Unlike the stated interest rate, APR can reflect certain upfront finance charges. That makes it useful when two lenders advertise similar rates but charge different origination fees or discount points.
APR is not the amount added to your balance each year. It is a comparison measure derived from the timing of the money you receive and the payments you make. Your monthly payment is usually calculated from the note rate, while APR describes the broader cost.
How to use this calculator
- Enter the full loan amount.
- Enter the fixed annual interest rate used to calculate the payment.
- Add lender charges that should be included in the comparison, such as origination fees or points.
- Choose the loan term in years.
The result shows the estimated APR, monthly payment, cash received after fees, and total financing cost. Use the same fee assumptions for every offer you compare.
How the APR calculation works
First, the calculator finds the fixed monthly payment using the standard amortizing-loan formula. It then treats the loan amount minus upfront fees as the cash you actually receive. Finally, it solves for the monthly discount rate that makes the present value of all scheduled payments equal those net proceeds. The monthly rate is multiplied by 12 to produce a nominal annual percentage rate.
For example, if you borrow 10,000 at 10% for one year but pay 500 in upfront finance charges, you receive only 9,500 while making payments based on 10,000. The estimated APR is therefore substantially higher than 10%.
Which fees should you include?
Include charges that are required to obtain the loan and are treated as finance charges in the disclosure you are comparing. These may include origination charges, some lender fees and discount points. Do not automatically include optional products, government taxes, insurance premiums or third-party costs. Rules differ by country, loan type and disclosure regime, so use the lender’s official APR for legal or contractual decisions.
APR versus APY
APR is commonly used for borrowing costs. APY, or annual percentage yield, is commonly used for deposit and investment growth and includes compounding. They answer different questions and should not be compared as if they were the same measure.
Limitations
This tool models a fixed-rate loan with equal monthly payments and fees paid at the start. Adjustable rates, irregular payments, interest-only periods, balloon payments, rebates and fees financed into the balance require a different cash-flow model. The calculator is an educational estimate, not a lender disclosure.