September Homebuyer Checklist — The Quick Read: As of September 28, 2026, mortgage rates have climbed for four straight weeks, and the move has picked up speed since the Fed raised its target range on September 16. Freddie Mac’s survey put the 30-year fixed at 7.03% for the week of September 24. The old summer checklist ends with paperwork and school districts. This fall, the step that matters most is the lock decision. My rule: if you like the house and the numbers work today, lock it.
Every observation below carries the date of its source. Here is the scorecard.
Key Takeaways
- Freddie Mac’s 30-year average rose four weeks in a row, from 6.66% for the week of August 27 to 7.03% for the week of September 24. That is 37 basis points in a month.
- The Fed raised its target range by 25 basis points on September 16, and the 10-year Treasury yield hit its highest level since 2007 the week after.
- Buyers have more choice and more room to negotiate than they did a year ago. Financing is the pressure point.
- Weekly averages lag the daily market. Read them for direction, not as a quote.
- A lock protects you from a rising market. It does not fix a budget that only works at a lower rate.
What Changed Since Late August?
Rates rose every week in September, and the biggest step came right after the Fed. Freddie Mac’s release for September 3 showed 6.71%, up 5 basis points from 6.66% the week before. The September 10 survey read 6.76%. Then came the jump.
Freddie Mac’s survey put the 30-year fixed at 6.95% for the week of September 17, up 19 basis points in one week. That was the first survey after the Fed’s decision. The week of September 24 added 8 more. The current Freddie Mac survey reads 7.03%, against 6.30% a year earlier. That is 73 basis points higher than a year ago.
One caveat on the survey itself. Freddie Mac’s number is a weekly average for conventional, conforming purchase loans, for borrowers with 20% down and excellent credit. It is a useful gauge of direction. It is not a price list. Every figure here varies by lender and program — guidelines, property type, leverage, and credit profile all apply.
The daily market runs hotter. Mortgage News Daily’s index rose 19 basis points in a single day on September 24, to 7.45% from 7.26% the day before, per Yahoo Finance. Its live page as displayed on September 28 showed 7.50%, a level last seen on April 30, 2024. That reading is an undated snapshot, so treat it as a rough guide.
Why the gap between 7.03% and 7.45%? Timing and method. The weekly survey averages several days. The daily index shows one day. When the market is moving up, the daily number leads and the weekly number trails.
The Fed, the Treasury, and What Drives Mortgage Rates
The Fed acted on September 16. The Federal Reserve’s statement shows a unanimous 12–0 vote to raise the target range by 25 basis points, to 3¾–4%. It says inflation “remains elevated.” CNBC reported it was the first hike since July 2023, and that 16 of 18 officials expect another increase this year.
Here is the misreading I want to head off. The Fed did not single-handedly cause the mortgage jump. Mortgage rates track the 10-year Treasury yield more closely than the Fed’s own rate. That yield crossed 5% on September 14, two days before the meeting. CNBC reported it reached 5.23% on Friday, September 25, its highest since 2007, after trading just below 4.8% earlier in the month. A secondary outlet, WRE News, reported an intraday high of 5.27% on September 28, so hedge that one. Check the daily series at FRED before quoting an exact close.
Sources disagree on how much of this is the Fed and how much is global. Semafor’s September 24 report points to deficits, oil and Treasury auction demand as well. I can’t tell you which factor dominates, and the evidence doesn’t let anyone say for certain.
What Does the Housing Data Say?
Demand is softening, and inventory is building. That is the buyer-friendly half of the picture. The financing half is the problem.
NAR’s August existing-home sales report, released September 10, showed sales down 2.0% to a 3.98 million annual pace. Inventory stood at 1.62 million homes, or 4.9 months of supply, which NAR’s chief economist called the highest in more than ten years. The median existing-home price was $429,100, up 1.6% from a year earlier. Sales have now fallen three months in a row: June by 2.4%, July by 1.7%, August by 2.0%.
The application data points the same way. The MBA’s weekly survey, released September 23 for the week ending September 18, showed the unadjusted Purchase Index 11% lower than a year earlier. Refinance applications were 62% lower than a year earlier.
New construction tells a mixed story. Census data released September 24 put August new-home sales at a 684,000 annual pace, up 6.4% from July, with 8.5 months of supply. Inman noted that the monthly change is not statistically significant. It also reported that the average new-home price fell 8.8% from a year earlier and that builder incentives were the highest since December.
Realtor.com’s August report, summarized by Inman, found 20.4% of listings had price cuts. Realtor.com’s economist named the week of September 27 to October 3 the best time to buy this year, with more choice and less urgency. The same release says mortgage rates offer little financing relief.
Why Is “Prices Are Falling, So Wait” a Trap?
Because the measures disagree, and because waiting has its own cost. NAR’s median sale price is up 1.6% from a year ago. Listing prices and new-home prices are down. Different yardsticks, different answers.
Now do the arithmetic on waiting. Say you hope prices soften by a couple of percent over the next few months. If the rate on your loan moves from 7% to 7.5% in the meantime, that half point can erase the savings. It can also change how much house your income supports. That is a hypothetical, not a forecast. My point is that price and rate move on different clocks, and you are exposed to both.
A related misreading: “If rates rise I can refinance later.” That may not hold. Refinance applications sit well below where they were a year ago, and the channel is largely shut. Plan on the rate you take at closing being the rate you live with for a while. Refinancing is an option, not a plan.
My Take
I think this move has more room to run than most buyers assume. Freddie Mac’s own weekly average trails the daily index by well over 40 basis points right now. That tells me the survey has more catching up to do if daily rates simply hold. The Fed’s projections point to another hike this year. The next meeting is October 28, and I can’t tell you what it will do.
But the market is not one-directional. Yields spike and retreat. Mortgage News Daily itself said on September 28 that oil does a poor job of explaining the upward momentum, so no one has a clean story for why this is happening. If anybody tells you they know where rates land by Halloween, they’re guessing.
Here is where that leaves me. You can’t time the top. You can control whether one bad week wrecks your purchase. That is the entire case for locking.
My rule is simple: if you like it, lock it. That matters most if your debt-to-income ratio is tight. Debt-to-income is the share of your monthly income that goes to debt payments, including the new mortgage. Lenders review it to decide how much you can borrow. When a file has little cushion, a rate that ticks up between offer and closing can push the ratio past a lender’s limit. Then the loan changes shape or falls apart. A rate move that looks small on a chart can be the difference between a file that works and one that doesn’t.
What Is a Rate Lock, and When Should You Use One?
A rate lock is a lender’s commitment to hold a quoted rate for a set period while your loan is processed. If the market rises during that period, you keep your locked rate. If the market falls, the answer depends on whether your lock includes a float-down option. Terms vary, so ask before you sign.
Three mechanics matter this month.
Locks have expiration dates. If your closing slips past the lock period, you may need an extension, which can carry a cost. Ask how long the lock runs and what an extension involves. The lenders we work with set their own terms.
Quotes from different days are not comparable. With the daily index moving 19 basis points in a day, a quote from Tuesday and a quote from Friday describe two different markets. Gather your comparisons on the same day, ideally within the same few hours. Otherwise you are comparing the market, not the lenders.
Floating is a bet. Floating means leaving your rate unlocked and hoping the market falls. It works sometimes. It has not worked in September. If you can’t afford to be wrong, don’t float.
None of this is a quote. I’m describing how the mechanism works. What you’re offered depends on your credit, your down payment, the property and the lender.
The September Checklist, Revised
Here is the checklist I would hand a buyer today. The order matters.
1. Stress-test your budget at a higher rate. Rerun your numbers assuming rates are half a point above today’s. If the purchase only works at today’s rate, you have no margin. Better to know that now.
2. Check your debt-to-income ratio before you shop. Pay down revolving balances and avoid new debt. A tight ratio is the file most at risk when rates climb.
3. Get pre-approved, and ask how locks work. A pre-approval is a lender’s review of your finances. It is not a rate commitment. Ask when you can lock, for how long, and what an extension involves.
4. Compare on the same day. Collect quotes together so they describe the same market. Compare the whole loan, not just the headline number.
5. Use your leverage on the house. Inventory and price cuts give you room to ask for seller concessions. That helps your cash position. It does not lower the rate, so don’t treat it as a substitute for the lock decision.
6. Match your lock to your timeline. A lock shorter than your closing schedule is a risk. A lock that fits your schedule is protection.
7. Decide before you fall in love. Set your walk-away number in advance. In a moving market, that discipline is worth more than any tip.
Which Loan Fits Your File?
The right product depends on how you earn and what you’re buying. A conventional loan suits a borrower with steady traditional employment income and a standard profile. Self-employed borrowers, investors and people with irregular income often look at non-QM programs, which review a file on different evidence, such as bank statements or a property’s rental income. Investors buying a rental may look at DSCR loans, which qualify mainly on the property’s rent rather than the borrower’s personal income.
Non-QM is growing. Optimal Blue’s August 2026 lock data, as reported by Stacker, shows conforming loans held 47% of rate-lock volume, no longer a majority. It also reports that DSCR and investor loans exceeded 35% of non-QM. This is a secondary report of the original data, so read it as a direction. The same piece notes the non-QM label alone doesn’t establish weak credit, which is worth remembering the next time someone equates the two.
What each program is reviewed on, who it fits and what has changed live on the loan options page, which carries the current guidelines. All of it is subject to lender guidelines, credit review and property review. I don’t put program numbers in a column like this one, because they change and the page is the source of truth. For the investor side, our DSCR loans guide covers how rental-income review framework works.
What Should You Not Do Right Now?
Don’t read the weekly survey as your rate. It trails the daily market, and it describes a strong-credit, 20%-down borrower. Your file may price differently in either direction.
Don’t wait for a headline that says rates have peaked. By the time it runs, the move is usually over.
Don’t assume a lock fixes a stretched budget. It protects you from going higher. It does nothing if the payment already strains you at today’s level.
Don’t skip the second opinion on your structure. Lenders price the same borrower differently, and product fit matters as much as the rate.
Where This Leaves Buyers
Sellers are more flexible than they were a year ago. Inventory is at a decade high, price cuts are common, and builders are offering incentives. That is a real opening. The financing side has moved the other way, and it moved fast in September.
If you’re weighing a purchase or a refinance this fall, Lendmire can walk you through how the current programs fit your file. Call 828-256-2183 or request a quote. I’m a broker, so my job is to compare lenders and programs for you, not to promise a result.
Frequently Asked Questions
Should I lock my rate now or wait for it to fall?
Lock if the house and the budget work today. Rates rose four straight weeks in Freddie Mac’s survey, and the Fed’s own projections point to another hike this year. A drop is possible, but you would be betting your purchase on it. If your debt-to-income ratio is tight, the case for locking gets stronger.
Why do the weekly and daily rate numbers disagree?
They measure different things. Freddie Mac’s weekly survey averages several days for a prime borrower profile, and it read 7.03% for the week of September 24. Mortgage News Daily’s index reads a single day and printed 7.45% on September 24. In a rising market, the daily number leads and the weekly one trails.
Did the Fed hike cause mortgage rates to jump?
Only in part. The 10-year Treasury yield crossed 5% on September 14, two days before the Fed acted on September 16. Mortgage rates follow that yield more closely than the Fed’s target range. The hike added to pressure that was already building, alongside inflation, deficits and bond-market demand.
Is it a good time to buy with prices falling?
It’s a better time to negotiate than a year ago. NAR reported 4.9 months of supply for August, the highest in more than ten years, and Realtor.com found 20.4% of listings with price cuts. But NAR’s median price is still up 1.6% from a year earlier, and financing costs rose sharply in September. Judge the deal on both.
Can I refinance later if rates fall?
You may be able to, subject to lender guidelines and your own circumstances. But the MBA reported refinance applications 62% below a year earlier for the week ending September 18, so don’t count on it as your exit. Buy on terms you can live with, and treat a future refinance as a bonus.
About Lendmire
Lendmire (NMLS# 2371349) is a non-QM mortgage brokerage arranging DSCR investor loans in 41 markets — 40 states plus Washington, D.C. — and consumer mortgage programs, including bank statement, HELOC and down payment assistance options, in 16 states through wholesale lenders. Lendmire is the broker, never the lender; every file is underwritten by the lender under its own guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. Freddie Mac release, week of September 17, 2026
2. Freddie Mac Primary Mortgage Market Survey
3. Yahoo Finance, Mortgage News Daily index, September 24, 2026
4. Federal Reserve FOMC statement, September 16, 2026
5. CNBC, Fed rate decision, September 16, 2026
6. Semafor, Treasury yields, September 24, 2026
7. NAR Existing-Home Sales, released September 10, 2026
8. MBA Weekly Applications Survey, September 23, 2026
9. Inman, August new-home sales, September 25, 2026
11. best time to buy
12. Optimal Blue data via Stacker, September 28, 2026
This article is part of Lendmire’s Mortgage News series — every loan program’s qualification details, guidelines, and scenarios live on the loan options page.
Related reading: Beat the Back-to-School Rush: Smart Mortgage Strategies for Securing Your New Family Home Before August Ends · Summer Solstice Savvy: Timing Your Home Purchase for Maximum Benefit in the Longest Days of the Year · Labor Day and Your Loan: Strategic Steps for Homebuyers Eyeing a September Move
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Disclosures. The information presented in this article is general market commentary, not financial, legal, or tax advice. Lendmire is a mortgage brokerage (NMLS# 2371349) — not a direct lender or depository institution — and loan placement is subject to lender underwriting. Nothing in this content represents a commitment to lend. Loan terms, pricing, and program availability vary based on borrower qualifications, property characteristics, and state of subject property, and are subject to change at any time. Lendmire complies with Equal Housing Opportunity requirements. Consumer access: nmlsconsumeraccess.org.