When a lender sends you a quote, they lead with the interest rate. It's the big number. It's also incomplete.
The APR — Annual Percentage Rate — is the number that tells you what you're actually paying. Every mortgage borrower should understand the difference before they accept a single quote.
What is the interest rate?
The interest rate (sometimes called the "note rate" or "contract rate") is the annual cost of borrowing the principal — expressed as a percentage. It determines your monthly principal and interest payment.
A $600,000 loan at 6.40% = $3,753/month P&I. That's the interest rate doing its job.
What the interest rate does not include: origination fees, discount points, mortgage insurance, and other upfront costs. You can have a "low" interest rate with high fees — and end up paying more than someone with a "higher" interest rate but no fees.
What is APR?
APR is a standardized measure created under the Truth in Lending Act (TILA) to give consumers a way to compare the true cost of loan options. It takes the interest rate and factors in most fees — spread over the life of the loan — and expresses the result as a yearly percentage.
APR is always equal to or higher than the interest rate, because it includes additional costs. The wider the spread between rate and APR, the more fees are built into the loan.
When comparing two loan offers, always compare APRs — not interest rates alone. A 6.25% rate with $10,000 in fees can cost more over time than a 6.50% rate with $1,000 in fees, depending on how long you keep the loan.
What's included in APR vs. not included
| Cost | Included in APR? |
|---|---|
| Interest rate | Yes |
| Origination fee / points | Yes |
| Loan company fee | Yes |
| Mortgage insurance (PMI/MIP) | Yes |
| Prepaid interest | Yes |
| Property taxes (escrow) | No |
| Homeowners insurance (escrow) | No |
| Title insurance | No |
| Appraisal fee | No |
| Recording fees | No |
Why the spread matters at Zeus
Zeus charges $0 loan-officer commission. That means the spread between our interest rate and APR is smaller than traditional lenders charging 1–2% in origination fees.
Example on a $600,000 loan:
| Interest Rate | APR | Spread | Implied fees | |
|---|---|---|---|---|
| Retail bank | 6.95% | 7.70% | 0.75% | ~$12,000 |
| Zeus (wholesale) | 6.40% | 6.55% | 0.15% | ~$1,500 (3rd party only) |
The bank's APR is higher both because their base rate is higher and because their fee spread is higher. Comparing APRs — not rates — makes this visible.
APR's limitation: the break-even problem
APR assumes you keep the loan for its full term. If you sell or refinance in 7 years, a loan with higher upfront fees but a lower rate might look better on APR but worse in actual cost over your real hold period.
This is why Zeus shows you both rate and APR, and we're happy to run the break-even math for your specific scenario. The right answer depends on how long you plan to keep the loan.
How to use APR when comparing lenders
- Request a Loan Estimate (LE) from every lender. This is a standardized 3-page document required by law. It shows rate, APR, estimated payment, and itemized fees.
- Compare Section A (Origination Charges) on each LE. Any dollar in Section A is compensation to the lender or broker.
- Compare APRs for the same loan amount, term, and program.
- If rates are close but APRs differ significantly, investigate why — that's where the fees are hiding.