The Difference Between APR and Interest Rate, Explained With Real Numbers

The interest rate: the price of the money itself

The interest rate is the percentage the lender charges for the use of its money, applied to the loan balance — nothing else. It is the number that sets your principal-and-interest payment through the standard amortisation formula, M = P × r(1+r)ⁿ / ((1+r)ⁿ − 1).

Plug in a $320,000 loan at the site’s benchmark 7.28% over 360 months: the monthly principal and interest come to $2,189.48, and you would pay about $468,213 in interest over 30 years if you never refinanced or sold — every dollar of that flows from the rate. Run your own figures on our mortgage calculator.

The APR: the interest rate plus the fees

The APR — annual percentage rate — takes the interest rate and folds in the lender’s upfront charges: origination fees, discount points, and certain closing costs, spread across the loan’s full term as a single yearly percentage. Federal law — the Truth in Lending Act — requires lenders to disclose it so borrowers can compare the all-in cost. The CFPB’s explainer draws the line plainly: the rate is what the lender charges to borrow, while the APR reflects the rate plus some fees.

Think of it this way: the rate decides what leaves your account each month. The APR answers a different question — how expensive is this deal as a whole? Fees only ever push costs up, so the APR on a fixed-rate mortgage always runs at or above the interest rate.

The worked example: $320,000 at 7.28% with $8,000 in fees

Here is how the gap is computed. Start with the loan above: $320,000 at 7.28%, 30-year fixed, $2,189.48 monthly principal and interest. Now suppose the lender charges $8,000 in origination fees and points — you effectively receive $312,000 of value while making payments sized for $320,000.

The APR is the rate that makes those 360 payments of $2,189.48 exactly equal to the $312,000 you effectively received — it solves to 7.54%. Your rate is 7.28%, but the loan’s true all-in cost behaves like 7.54%, as the Bankrate guide’s fee examples confirm.

Three offers, compared by APR instead of rate

Three lenders quote on the same $320,000, 30-year fixed purchase:

Offer	Interest rate	Lender fees	Monthly P&I	APR	30-yr total
A	7.28%	$8,000	$2,189.48	7.54%	$796,213
B	7.50%	$2,000	$2,237.49	7.56%	$807,495
C	7.99%	$0	$2,345.82	7.99%	$844,494

Offer C’s rate looks merely 0.71 points above Offer A’s — but with zero fees its APR runs 0.45 points higher and costs about $48,000 more over the loan’s life. And between A and B, the cheaper headline rate (A) still wins on APR despite $8,000 in fees — 7.54% versus 7.56%. The rule from Bankrate’s APR explainer holds: on matching loan terms, the lower APR is the cheaper loan.

Points and origination fees: what stretches the gap

Two charges do the stretching. Discount points are prepaid interest — roughly 1% of the loan ($3,200 here) per point — that buy the rate down; the cash leaves at closing while the lower rate pays you back monthly. Origination fees are the lender’s flat charge for making the loan, often 0.5–1%.

Both push the APR above the rate, and points create the interesting tension: they lower your rate while raising your APR versus a no-points loan. Whether points pay off is a break-even question — our points guide works through the maths, and our refinance calculator handles the same trade-off on an existing loan.

Where APR misleads: ARMs, early exits, and credit cards

APR has blind spots worth knowing:

• Adjustable-rate mortgages. An ARM’s APR is computed against the fully indexed rate and assumes the loan adjusts on schedule — a guess about a future nobody can see. Comparing an ARM’s APR with a fixed loan’s APR compares a forecast with a fact.
• Selling or refinancing early. APR spreads fees over the full 30 years. Sell in year five and those $8,000 in fees were amortised over 60 payments, not 360 — the loan was really more expensive than its APR suggested. The shorter your horizon, the less you should pay in points.
• Credit cards. On a card, “APR” usually is the interest rate — no origination fees to fold in. The two terms only diverge meaningfully on instalment loans like mortgages and auto loans. If card interest is the problem, our payoff calculator shows the damage in dollars.

How to compare two offers the right way

Run this checklist on every Loan Estimate:

• Compare APR to APR and rate to rate — never one against the other, and only across the same loan type and term.
• Ask what is inside the APR. Lenders must include origination fees and points; some exclude third-party charges like the appraisal. Two APRs built from different fee baskets are not comparable.
• Match the horizon. If you will move in five years, recompute the break-even on points yourself — the 30-year APR flatters fee-heavy offers.
• Use the rate for the monthly budget, the APR for the choice. The rate sets your payment; the APR picks the winner.