Understand the difference between APR and interest rate, why both matter, and which one to use when comparing refinance offers.
You're shopping refinance lenders. One quotes 6.25% interest rate. Another quotes 6.40% APR.
Which is better?
You can't compare them. They're measuring different things.
Let me break it down.
Interest rate is the cost of borrowing money, expressed as a percentage of your loan balance.
Example:
Your interest rate determines your monthly payment (principal + interest).
That's it. Simple.
APR includes your interest rate PLUS upfront fees (spread over the life of the loan).
Fees included in APR:
Fees NOT included in APR:
Why APR matters: It shows the true cost of the loan when you factor in fees.
Two lenders can offer the same interest rate but wildly different APRs (because one charges higher fees).
Same interest rate. Different APR.
Lender B is cheaper because their fees are lower, even though the interest rate is identical.
If you only looked at interest rate, you'd think they're the same. But APR tells the truth.
APR calculation formula (simplified):
APR factors in:
The formula spreads your upfront fees over the life of the loan and adds them to your interest rate.
Example:
You don't need to calculate this yourself. Lenders are required by law to disclose APR on your Loan Estimate.
Broker's Tip: Always compare APR, not just interest rate. APR is the only way to see the true cost when lenders charge different fees.
APR is helpful, but it has blind spots.
APR assumes you keep the loan for the full 30 years.
But most people refinance or sell within 5-7 years. If you're paying $5,000 in fees upfront, you might not hold the loan long enough for APR to matter.
Example:
APR says Lender A is better (6.25% vs 6.35%).
But if you're selling in 3 years:
Lender A wins in the short term, even though APR is higher for Lender B.
This is why break-even analysis matters. APR doesn't account for how long you'll keep the loan.
See our break-even calculator guide.
Appraisal, title insurance, escrow fees are NOT included in APR.
Example:
APR says Lender B is better (6.30% vs 6.35%).
But total closing costs tell a different story:
Lender B is actually cheaper when you factor in ALL costs.
Lesson: Compare total closing costs, not just APR.
Adjustable-rate mortgages (ARMs) have rates that change over time.
APR on an ARM assumes:
This makes APR on ARMs basically useless.
Example:
For ARMs, compare:
See our fixed vs ARM guide.
Don't just compare interest rate. Don't just compare APR. Compare ALL of these:
Use our refinance calculator to model different scenarios.
Broker's Tip: Get Loan Estimates from 3-5 lenders. Put them side-by-side. Compare interest rate, APR, total fees, and break-even. The cheapest option will jump out.
Let's compare three actual quotes for a $400,000 refinance.
| Lender | Interest Rate | APR | Lender Fees | Total Closing Costs | Monthly Payment | Break-Even (vs doing nothing) | |--------|---------------|-----|-------------|---------------------|-----------------|-------------------------------| | A | 6.00% | 6.25% | $6,000 | $9,000 | $2,398 | 45 months | | B | 6.125% | 6.30% | $4,000 | $7,500 | $2,429 | 37 months | | C | 6.25% | 6.35% | $2,000 | $5,500 | $2,463 | 28 months |
Which is best?
If you're staying 10+ years: Lender A (lowest rate, lowest monthly payment)
If you're staying 5-7 years: Lender B (good balance of rate and fees)
If you're staying 2-4 years: Lender C (lowest upfront cost, fastest break-even)
APR alone doesn't answer this. You need break-even analysis.
The Truth in Lending Act (TILA) requires lenders to disclose APR on all loan offers.
Why? To prevent bait-and-switch tactics.
Before TILA, lenders would advertise:
Borrowers couldn't compare lenders because fees were hidden.
APR fixed that. It forces lenders to show the true cost.
But APR isn't perfect (see blind spots above). Always look at total closing costs AND APR.
Discount points let you "buy down" your interest rate.
1 point = 1% of loan amount = 0.25% rate reduction
Example:
Should you pay points?
Break-even calculation:
If you're staying 10+ years, pay the point. You'll save money long-term.
If you're staying 3-5 years, skip the point. You won't hold the loan long enough to recover the cost.
See our points vs no-points guide.
Q: Is APR the same as interest rate?
No. Interest rate is what you pay on your loan balance. APR is interest rate + upfront fees (spread over 30 years).
Q: Which one affects my monthly payment?
Interest rate affects your payment. APR is just a comparison tool.
Q: Can APR be lower than interest rate?
Rarely, but yes. If the lender gives you lender credits (money back at closing), APR can be slightly lower than your interest rate. This happens with "no-closing-cost" refinances.
Q: Why is my APR so much higher than my interest rate?
Because you're paying a lot in fees (origination, points, broker fees). The higher the fees, the bigger the gap between rate and APR.
Q: Do I pay APR or interest rate?
You pay the interest rate. APR is a disclosure tool, not your actual rate.
Q: Should I choose the loan with the lowest APR?
Not always. APR assumes you keep the loan 30 years. If you're selling or refinancing in 5 years, the lowest APR might not be the cheapest option. Run a break-even analysis.
Want to compare refinance offers with full transparency? Get personalized quotes with rate, APR, and total cost breakdowns:
I'm a California licensed mortgage broker with 15+ years experience (DRE #01212512). I'll show you exactly which lender offers the best deal for your timeline.
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Licensed mortgage broker with 15+ years of experience helping homeowners save money through refinancing. CA DRE #01212512.