APR Calculator

How the APR calculator works

The interest rate only tells you the cost of the money you borrow. The APR tells you the cost of the whole loan, because it rolls the fees and points into the rate. Both calculators above work the same way under the hood: they compute the monthly payment from the loan amount, rate and term, then find the single rate that makes the present value of those payments equal to the money you actually walked away with — the loan minus the fees and points you paid to get it. That rate, annualized, is the real APR.

The two versions differ only in their inputs. The general calculator takes a loan amount and lets you split fees into financed (rolled into the loan) and upfront (paid at closing). The mortgage calculator starts from a house value and down payment, and adds the costs a home loan involves — discount points and PMI. Use the APR alongside a full mortgage calculator and an amortization schedule when you compare offers.

Why the APR beats the sticker rate

Two lenders can quote the same 6.5% and offer very different deals once the fees are counted. The APR exposes that difference in a single number: the loan with the lower fees will have the lower APR, even at an identical interest rate. That is exactly why the law requires lenders to disclose it. When you shop, line up the APRs, not just the rates — but do it for loans of the same term, because APR spreads upfront costs across the life of the loan and therefore looks cheaper on a longer one.

One caveat: the APR assumes you keep the loan

The APR spreads the upfront fees over the full term, so it quietly assumes you hold the loan to the very end. In reality most borrowers move, refinance or pay off early — and when they do, those upfront fees are absorbed over far fewer years than the APR assumed, making the true cost higher than the APR suggested. If you expect to sell or refinance within a few years, weight the upfront fees and points more heavily than the APR alone implies, and favour the loan with the lower fees.

What is a good APR? Typical ranges by loan type

A good APR is relative — it depends on the type of loan and, above all, on your credit. As a rough guide, the strongest borrowers see roughly the following: mortgages in the mid-single digits, auto loans around the mid-single digits for new cars and a little higher for used, personal loans anywhere from high single digits to the mid-teens, and credit cards commonly in the high teens to mid-twenties. Secured loans backed by a house or car carry the lowest APRs because the lender can recover the asset; unsecured borrowing costs more. Within any category, your credit score, term and down payment move the number substantially, so the real test of a good APR is whether it beats the other genuine offers you can get for the same loan. Always compare APR to APR — not APR against a bare interest rate — because only APR folds in the fees.

Estimate only — not a loan offer or financial advice. Which fees a lender folds into APR can vary; your official APR is the one on the lender's disclosure. Confirm figures with your lender.

How to use it & key terms

Pick the general calculator for any loan or the mortgage calculator for a home loan, enter the amount, term, rate and fees, and press Calculate to see the real APR and total cost.

Where APR falls short: credit cards and adjustable rates

APR was designed for a fixed-rate loan with a set term and a predictable stream of payments — precisely what the two calculators above assume. On two very common products, though, that neat definition starts to bend, and the single headline percentage can quietly mislead. The first is the credit card. A card's APR is really just its periodic rate annualized, and because a card has no fixed term and no closing fees to fold in, its APR usually equals the nominal rate rather than sitting above it the way an installment loan's does. More importantly, a single card carries several APRs at once: one for purchases, another for balance transfers, another for cash advances, and a penalty APR that can take over after just one missed payment. The rate printed on the front of the offer is only the purchase APR.

The second is any adjustable-rate loan. When a lender discloses the APR on an adjustable-rate mortgage or a variable-rate personal loan, it has to assume something about a future nobody can know, so it assumes the index behind your rate simply never moves. That turns the figure into a snapshot rather than a promise: if rates climb after your fixed introductory period ends, your real cost rises above the APR you were quoted; if they fall, it drops below. Comparing the APRs of two adjustable loans tells you about their fees and their starting rates, but almost nothing about how differently they may behave once the adjustments actually begin.

The lesson is simply to match the measure to the product. For a fixed installment loan you plan to hold to term — a car loan, a fixed mortgage, a straightforward personal loan — APR is the honest, all-in comparison it was built to be, and the tools above hand it to you directly. For revolving or adjustable debt, treat APR as a starting point and read what sits beneath it:

• Which balances each separate rate applies to.
• When a promotional or introductory rate expires.
• How high a variable rate is allowed to climb.
• What behaviour triggers a penalty rate.

The one number is a fine place to begin a comparison, but on these products it rarely tells the whole story, and the details beneath it are where the real cost hides. Reading them before you sign is what keeps a low advertised rate from turning into an expensive surprise.