What you're actually comparing when you look at rates
A mortgage rate is the percentage of your loan balance that the lender charges you each year in interest. When you see "3.5%" or "6.8%", that number determines how much of each monthly payment goes toward interest versus paying down what you borrowed. A lower rate means less interest paid over the life of the loan, but the lowest advertised rate is rarely the one you'll actually get — it depends on your credit score, down payment, loan type, and the specific lender's requirements.
The rate you see advertised is usually the best-case scenario: often for borrowers with excellent credit (typically 740 or higher), a 20% down payment, and a conventional loan. Your actual rate will be higher if any of those factors don't match. This is why comparing rates across multiple lenders matters — the same borrower profile gets quoted different rates at different places, and those differences add up to thousands of dollars over 15 or 30 years.
Key Takeaways
- Get rate quotes from at least three lenders — banks, credit unions, and mortgage brokers — using the same loan details so the numbers are actually comparable.
- The advertised rate and the APR (annual percentage rate) are different; APR includes fees and is closer to your true cost, but neither includes property taxes or insurance.
- Rates change daily and lock in only when you formally lock the rate with a lender, usually for 30 to 60 days while your application processes.
- A lower rate isn't always the better deal if the lender charges higher origination fees or requires you to pay points upfront to get that rate.
- Your credit score, down payment size, loan type (conventional, FHA, VA), and the property location all affect the rate you're offered.
Where to get rate quotes and what information you need ready
Start by gathering the details lenders will ask for: your approximate credit score (you can check for free at annualcreditreport.com), how much you plan to put down, the loan amount you need, the property location, and whether you want a 15-year or 30-year loan. You don't need to have the house picked out yet — lenders quote based on loan type and amount, not the specific property.
Contact at least three sources: a traditional bank (your own bank if you have one, or a larger lender like Chase or Bank of America), a credit union if you're a member, and a mortgage broker who works with multiple lenders. Each will give you a rate quote, usually valid for a few days. Write down the rate, the APR, the origination fee (what they charge to process the loan), any discount points (upfront fees you pay to lower the rate), and the loan term. Ask whether the quote assumes a 20% down payment or something else — if you're putting down 10%, ask for a re-quote at that amount, because the rate changes.
Online lenders like Better.com, Rocket Mortgage, and LendingTree also offer quotes, though you'll be entering information into a form rather than talking to a person. These can be faster, but you may get fewer options for loan types or less explanation of what you're seeing.
Understanding APR versus the interest rate
The interest rate is just the percentage you pay on the borrowed amount. The APR (annual percentage rate) includes the interest rate plus lender fees, origination costs, and discount points, expressed as a yearly percentage. The APR is always equal to or higher than the interest rate, and it's the number that's closer to your actual cost of borrowing.
For example: a lender might quote you 6.0% interest with a 1% origination fee ($3,000 on a $300,000 loan). The APR might be 6.15% because it spreads that $3,000 fee across the life of the loan. When comparing two lenders, the APR is more useful than the interest rate alone because it accounts for the fees you're actually paying. However, APR still doesn't include property taxes, homeowners insurance, or HOA fees — those are separate costs that vary by location and property.
How discount points work and when they make sense
A discount point is an upfront fee you pay at closing to lower your interest rate. One point typically costs 1% of the loan amount (so $3,000 on a $300,000 loan) and usually lowers your rate by 0.25%. Some lenders offer the option to buy points; others don't mention them unless you ask.
Buying points makes sense only if you plan to stay in the house long enough to recoup what you paid upfront. If you buy one point for $3,000 and it saves you $50 per month in interest, you break even after 60 months (5 years). If you think you'll move or refinance within that time, skip the points. If you're planning to stay 10+ years, points often pencil out. Ask the lender to show you the break-even point in writing — they should be able to tell you exactly how many months until the monthly savings cover the upfront cost.
Why the same borrower gets different rates at different lenders
Lenders have different risk models, different operating costs, and different profit margins. One bank might specialize in borrowers with lower credit scores and price that risk higher. Another might have lower overhead and pass some savings to you. A credit union might offer better rates to members but have stricter requirements. A mortgage broker might have access to 50 different loan products and can shop your application around.
This is why getting three quotes is standard practice — the difference between the highest and lowest rate you receive might be 0.25% to 0.5%, which translates to $50 to $100+ per month on a $300,000 loan. Over 30 years, that's $18,000 to $36,000 in total interest. The lender with the lowest advertised rate isn't always the one offering you the best deal once you factor in fees.
How to lock in a rate and what happens if rates drop after you lock
A rate quote is only good for a few days — usually 3 to 7 days. Once you decide to move forward with a lender and formally submit your application, you can lock the rate, which means the lender guarantees that rate for a set period, typically 30, 45, or 60 days. The lock protects you if rates go up during that time; you keep the rate you locked in.
If rates drop after you lock, you're stuck with the higher rate unless the lender offers a "float-down" option, which lets you lock in a lower rate once during the loan process. Not all lenders offer this, and some charge a fee for it. Ask about float-down before you lock. Once your loan closes, the rate is final — you can't change it without refinancing, which means applying for a new loan and paying closing costs again.
Factors that change the rate you're offered
Your credit score is the biggest factor. A score of 760+ typically gets the best rates. A score of 700–759 might be 0.25% higher. Below 680, rates jump significantly, and below 620, many conventional lenders won't work with you at all. Check your score before you start shopping so you know what range to expect.
Your down payment matters because a larger down payment means less risk for the lender. A 20% down payment usually gets the best rate. A 10% down payment might be 0.25% to 0.5% higher. A 3% down payment is higher still. If you're putting down less than 20%, you'll also pay PMI (private mortgage insurance), which is an additional monthly cost that protects the lender if you default.
Loan type affects the rate: conventional loans (not backed by the government) usually have the lowest rates for well-may have access to borrowers. FHA loans (backed by the Federal Housing Administration) often have higher rates but allow lower down payments and credit scores. VA loans (for military members and veterans) often have competitive rates. USDA loans (for rural properties) have their own rate structure.
The property location and loan term (15-year versus 30-year) also change the rate. A 15-year loan typically has a lower rate than a 30-year loan because the lender's risk is shorter. Some states or counties have higher default rates, which can affect rates slightly.
Creating a comparison spreadsheet so you can actually see the differences
Once you have quotes from three or more lenders, create a simple spreadsheet with these columns: Lender Name, Interest Rate, APR, Origination Fee, Discount Points (if any), Loan Term, Down Payment Assumed, and Total Cost Over 30 Years (if the lender provides it). This makes it easy to see which lender is actually offering the best deal, not just the lowest advertised rate.
Calculate the monthly payment yourself if the lender doesn't provide it. A free mortgage calculator (available on most bank websites or on sites like bankrate.com) will show you the monthly principal and interest payment based on the rate, loan amount, and term. Add your estimated property taxes, homeowners insurance, and PMI (if applicable) to get your true monthly housing cost. This total is what you'll actually pay each month, and it's the real basis for comparison.
Don't just pick the lowest rate. Look at the APR, the origination fee, and whether you'd need to buy points. A lender with a 6.0% rate and a $2,000 origination fee might be better than one with a 5.9% rate and a $4,000 fee. The spreadsheet makes that comparison obvious.
Frequently Asked Questions
Can I lock a rate before I'm officially approved?
Most lenders require you to submit a formal application before locking a rate, though some allow a "soft lock" or "rate hold" for a few days while you decide. A soft lock isn't binding on either side. Once you're in the formal application process, you can lock for 30 to 60 days. Ask the lender whether a lock requires a full application or if they'll hold a rate while you shop.
What if my credit score is lower than 620?
Conventional lenders typically won't work with scores below 620. FHA loans allow scores as low as 500, though rates are higher and you'll need a larger down payment (usually 10% minimum). Credit unions sometimes work with lower scores. Consider working with a mortgage broker who specializes in lower-credit borrowers — they know which lenders will consider your application and what rate to expect.
Should I get pre-approved or just get rate quotes?
A rate quote is free and non-binding. Pre-approval requires a formal application, a credit check, and verification of income and assets, but it shows sellers you're serious and gives you a clearer picture of what you can afford. Get quotes from multiple lenders first to compare rates, then choose one and go through pre-approval with them before you make an offer on a house.
Do I have to use the lender that gave me the best quote?
No. A quote is just information. You can shop rates, then choose any lender you want and formally apply with them. However, each formal application triggers a credit check, which temporarily lowers your score slightly. Multiple credit checks within 14 days (for mortgage shopping) usually count as one inquiry, so do your shopping within a two-week window to minimize the impact.
What if rates drop after I lock but before I close?
You're locked in at the rate you chose. If the lender offers a float-down option and you haven't used it yet, you can usually lock in the lower rate once. If there's no float-down option, you keep the original rate. This is why asking about float-down before you lock is important — it's one of the few ways to benefit if rates drop during your loan process.