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APR Explained in 2 Minutes: What It Means and How to Use It

4 min read ·

APR is the yearly price of borrowing, shown as a percentage. Divide it by 12 and multiply by what you owe, and you have a close guess at this month’s interest.

What is APR?

APR (annual percentage rate) is the yearly cost of borrowing, shown as a percentage.

It tells you how expensive a debt is. A higher APR means you pay more to borrow the same amount.

APR is a yearly figure. But most debts charge you every month. So the useful skill is turning the yearly number into a monthly one. That comes below.

(New to interest itself? Start with what is interest.)

What does APR include?

The US consumer regulator, the CFPB, says APR is the interest rate plus certain fees charged by the lender, such as fees for setting up the loan.

MoneyHelper, the UK government-backed money guide, says the same about loan arrangement fees: they are included in the APR.

So APR is usually a fuller price than the interest rate alone.

One warning: the rules are not the same everywhere. Australia’s government money guide, Moneysmart, says its APR leaves out account fees. A separate “comparison rate” includes them there. So always check what the number on your offer covers.

How do you turn APR into a monthly cost?

Here is the method in words: monthly rate equals the APR divided by 12. Monthly interest equals your balance times the monthly rate.

Say you owe $4,200 on a card with an APR of 19.9%.

Step 1. Monthly rate: 19.9 ÷ 12 = 1.658% a month.

Step 2. Monthly interest: 4,200 × 0.01658 = about $70.

Step 3. Over a year: 4,200 × 0.199 = about $836. That is if your balance stays at $4,200 and you pay the interest each month.

So 19.9% sounds small. But on this balance it costs about $70 every month, just to stand still.

This is a close estimate. Your lender may work it out a little differently.

Nada's Which rate? help screen, showing to look for the APR on a statement.
Not sure which rate to use? Nada's "Which rate?" help shows which number to type in (sample screen).

Why can you pay more than the APR suggests?

Because unpaid interest gets charged interest too.

Take the same $4,200 at 1.658% a month. This time, you pay nothing for a year. Each month, the interest is added to the balance. Next month’s interest is worked out on the bigger number.

After 12 months, you would owe about $5,116. That is about $916 of interest, not $836.

$916 is about 21.8% of $4,200. So the real cost was higher than the 19.9% on the label.

This is called compound interest. It is explained with one example in simple vs compound interest.

The fix is simple: pay something every month, at least the interest.

How do you use APR to compare offers?

The CFPB’s advice is short: compare APRs with APRs, not APRs with interest rates. The two are not the same.

MoneyHelper gives the same advice for loans. It also warns that the rate in an advert is not always the rate you get. You may only see your real rate after you apply.

When you compare, check three things:

  1. The APR on the offer you actually receive.
  2. What fees it includes, and which ones it leaves out.
  3. The total you will pay back. A long loan at a low APR can still cost more in total than a short one.

Which debt should you look at first?

If you have more than one debt, list each one with its APR.

The highest APR costs you the most per dollar you owe. Paying it down first saves the most interest. That is the “avalanche” method. See snowball vs avalanche for how it compares with other orders.

Do this today (10 minutes)

  • Find the APR and balance for each debt on your latest statements.
  • For each one, work out monthly interest: balance × APR ÷ 12.
  • Add them up. That total is what your debts cost you each month, before you pay off a single dollar.

Nada does this math for you. Add your debts with their APRs, and it shows your monthly interest and your payoff date. Get Nada

FAQ

Is APR the same as the interest rate? Not always. The interest rate is the charge for borrowing the money. APR adds certain fees on top, such as a fee for setting up the loan. That is why the APR can be higher than the interest rate. When you compare offers, compare APR with APR.

How do I work out my monthly interest from APR? Divide the APR by 12 to get a monthly rate. Then multiply your balance by that rate. At 19.9%, the monthly rate is about 1.658%. On $4,200, that is about $70 a month. Your lender may use a slightly different method, so treat it as a close estimate.

Why did I pay more interest than the APR suggests? If you don’t pay the interest each month, it is added to your balance. Next month, you pay interest on that interest too. In the example, unpaid interest on $4,200 at 19.9% grows to about $916 in a year, not $836. Paying something every month stops this.

Is the advertised APR the rate I will get? Not always. Lenders often show a typical rate in adverts. The rate you are offered can be higher, and you may only find out after you apply. Read the offer you actually receive, check which fees it covers, and use that APR to compare.

Sources

Read in October 2026.

Written by the Nada team. Reviewed October 2026.

This is general information, not personal advice.

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