How a 1% Rate Increase Cuts Your Buying Power (2027)
A 1-percentage-point rise in a 30-year fixed mortgage rate adds about $66 a month for every $100,000 you borrow and shrinks the loan a fixed monthly payment can carry by roughly 10%. At Freddie Mac's October 29, 2026 average of 7.24%, a $354,000 loan (20% down on Virginia Beach's September 2026 median of $442,500) costs $236 a month more in principal and interest than it would at 6.24%. Keep the payment the same and you borrow about $34,500 less.
Key takeaways at a glance
- Each 1-point rate increase adds about $63 to $68 a month per $100k borrowed (rates between 5% and 8%).
- Buying power drops about 9% to 10.5% per point: the payment on a $400k loan at 6.24% carries about $361k at 7.24%.
- It already happened: the PMMS average was 6.17% a year ago and 7.24% on October 29, 2026.
- Locking your rate protects you during your closing window, typically 30, 45 or 60 days.
- About two-thirds of weekly PMMS readings in the past 50 years were above 6%; in the past 10 years, fewer than half.
| Rate change | Per $100k | On $325k loan | On $400k loan | On $500k loan |
|---|---|---|---|---|
| 5% to 6% | +$63/mo | +$204/mo | +$251/mo | +$314/mo |
| 6% to 7% | +$66/mo | +$214/mo | +$263/mo | +$329/mo |
| 6.24% to 7.24% | +$66/mo | +$216/mo | +$266/mo | +$332/mo |
| 7% to 8% | +$68/mo | +$223/mo | +$274/mo | +$342/mo |
30-year fixed, principal and interest only. A 1-point increase removes about 9% to 10.5% of the loan a fixed payment supports. Lock when ready instead of timing the market.
In this guide
The basic math and assumptions
The monthly principal and interest (P&I) on a fixed-rate loan is M = L × i ÷ (1 − (1 + i)−n), where L is the loan amount, i is the annual rate divided by 12, and n is 360 months for a 30-year loan. Per $100,000 borrowed, that works out to:
- 5% rate = $537/month
- 6% rate = $600/month
- 6.24% rate = $615/month
- 7% rate = $665/month
- 7.24% rate = $682/month (the October 29, 2026 PMMS average)
- 8% rate = $734/month
Buying power runs the formula backward. $615.07 ÷ $681.50 = 0.9025, so at 7.24% the same payment carries about 90% of the loan it carried at 6.24%, at any loan size: $400k becomes about $361k, and $500k about $451k.
Assumptions used in every number on this page
- 30-year fixed, principal and interest only. Taxes, insurance, HOA dues, mortgage insurance and any VA funding fee are left out because they do not change with the rate.
- Baseline: Freddie Mac PMMS average of 7.24% (week of October 29, 2026) against 6.24%.
- 20% down, matching the PMMS borrower profile (home purchase, 20% down, good to excellent credit).
- Buying power keeps the same cash down and the same monthly P&I, so the loss shows up as a smaller loan.
- PMMS is a national average; your quote depends on credit, down payment, loan type and points.
Hampton Roads examples at September 2026 prices
The table applies that math to each city's September 2026 median sold price (VaHome analysis of REIN MLS data, September 2026; see the VaHome monthly market reports for each city).
| City | Median price | Loan (20% down) | P&I at 6.24% | P&I at 7.24% | Extra per month | Less loan, same payment |
|---|---|---|---|---|---|---|
| Portsmouth | $289,500 | $231,600 | $1,424 | $1,578 | +$154 | −$22,600 |
| Hampton | $304,900 | $243,920 | $1,500 | $1,662 | +$162 | −$23,800 |
| Newport News | $309,950 | $247,960 | $1,525 | $1,690 | +$165 | −$24,200 |
| Norfolk | $331,000 | $264,800 | $1,629 | $1,805 | +$176 | −$25,800 |
| Suffolk | $395,000 | $316,000 | $1,944 | $2,154 | +$210 | −$30,800 |
| Chesapeake | $410,000 | $328,000 | $2,017 | $2,235 | +$218 | −$32,000 |
| Williamsburg | $440,000 | $352,000 | $2,165 | $2,399 | +$234 | −$34,300 |
| Virginia Beach | $442,500 | $354,000 | $2,177 | $2,413 | +$236 | −$34,500 |
| Yorktown (York County) | $516,450 | $413,160 | $2,541 | $2,816 | +$275 | −$40,300 |
Medians cover all closed residential sales and move month to month (Chesapeake fell 4.7% from August; Yorktown rose 11.1% on 46 sales). With 0% down, as on many VA loans, the dollar gap grows by a quarter: on Virginia Beach's $442,500 median, P&I is $2,722 at 6.24% and $3,016 at 7.24%, before any funding fee. Our guide to how much house you can afford on BAH adds taxes and insurance.
This 1-point move is real: the PMMS average rose from 5.98% on February 26, 2026 to 7.40% on October 8 and 15, 2026, then eased to 7.24%.
When to lock
Rate locks typically run 30, 45 or 60 days, according to the CFPB. Some lenders lock when they issue your Loan Estimate and some do not; page 1 of the Loan Estimate shows whether and until when. Extensions can be expensive, so match the lock to your closing date. Weekly moves can be large: the PMMS average went from 7.03% to 7.28% between September 24 and October 1, 2026, about $55 a month on a $328,000 loan. Lock when you're ready rather than trying to time the market.
Should you wait for rates to drop?
Waiting is a bet, not a plan. Of 2,610 weekly PMMS readings from October 1976 through October 29, 2026, 1,749 (67%) were above 6%; over the past 10 years, only 214 of 522 (41%) were. History does not promise either direction. Buy when you're ready and the payment works at today's rate; if rates fall later, refinancing may help, though it has its own closing costs. See refinance options, and for the wider question, read whether now is a good time to buy in Hampton Roads.
Frequently Asked Questions
How much does a 1% mortgage rate increase cost?
About $63 to $68 a month per $100k borrowed on a 30-year fixed loan when rates are between 5% and 8%. From 6.24% to 7.24%, a $400k loan costs $266 a month more, or about $39,000 less loan for the same payment.
Should I wait for rates to drop before buying?
Usually not as a strategy. Rates may not drop, and waiting has costs of its own, such as continued rent. Buy when the payment fits and consider refinancing if rates fall enough to cover the costs.
What's the difference between a 30-year and 15-year mortgage rate?
Since January 2024, the PMMS 15-year average has run about 0.5 to 0.9 points below the 30-year (6.60% against 7.24% on October 29, 2026). The payment is much higher because the principal is repaid in half the time.
Can I lock my rate before having a contract?
Most standard locks need a property and a loan application. Some lenders offer "lock and shop" programs that hold a rate while you house-hunt, with conditions such as a pre-approval, a contract deadline or a small rate add-on.
What is a rate buydown?
Paying upfront to lower the rate temporarily (often for the first 1 to 3 years) or permanently through discount points. Builders and sellers sometimes pay for one as a concession.
Are rates higher for first-time buyers?
No. The CFPB lists credit score, down payment, loan term and loan type as rate factors; first-time-buyer status is not one. A first-time buyer may pay more only if their credit or down payment is weaker.
How do mortgage rates change?
They track the 10-year Treasury yield and the mortgage-backed securities market. See how mortgage rates are determined.
Should I pay discount points to lower my rate?
Sometimes. One point costs 1% of the loan amount. Divide the cost of the points by the monthly savings to find how many months it takes to break even, and pay points only if you expect to keep the loan longer than that.
Have a question about your home purchase?
Talk to a Hampton Roads buyer's agent or loan officer who can walk through your specific situation - no pressure, no obligation.
Sources & further reading
- Freddie Mac: Primary Mortgage Market Survey (week of October 29, 2026)
- Freddie Mac: PMMS weekly history since 1971
- VaHome analysis of REIN MLS data, September 2026 (city market reports)
- CFPB: What's a lock-in or a rate lock?
- CFPB: Discount points and lender credits
- CFPB — Factors that affect your mortgage rate
- CFPB — Loan Estimate
- Federal Reserve
Rates are the Freddie Mac PMMS averages as of October 29, 2026; median prices are VaHome analysis of REIN MLS data, September 2026. Payments are principal and interest only. Always confirm current details with your lender or a licensed professional before relying on any specific figure.
About the Author
Tom & Dariya Milan are a husband-and-wife team of licensed Virginia real estate agents serving Hampton Roads since 2005. Tom handles listing strategy, pricing and negotiation; Dariya handles buyers, contract-to-close and relocations. Their closings and reviews, pulled from the MLS, are on the About page. Brokered by LPT Realty. Call (757) 777-7577 or email tom@vahome.com.
About the Hampton Roads Real Estate Market
Hampton Roads is one of the most dynamic real estate markets on the East Coast, anchored by the largest naval complex in the world at Naval Station Norfolk and home to roughly 120,000 active-duty, reserve, and civilian Department of Defense personnel. The region spans seven cities — Virginia Beach, Norfolk, Chesapeake, Suffolk, Portsmouth, Hampton, and Newport News — plus the Peninsula communities of Williamsburg, Yorktown, and Poquoson, with each market carrying its own personality, school district, and price profile.
Buying or selling here means thinking about more than just a house. Tidewater geography means flood zones, hurricane preparation, and waterfront premiums matter. Military presence means BAH affordability, PCS season inventory crunches (May through August), and VA loan eligibility are top of mind for a meaningful share of every neighborhood. School quality varies block by block, especially across the seven independent city school divisions, and is often the deciding factor for relocating families.
Why Buyers and Sellers Choose VaHome
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Whether you are buying your first home with a VA loan, moving up while your kids transition between school districts, or selling a Hampton Roads property to relocate to your next duty station, the resources on this site are organized around the questions you are actually asking. Browse listings filtered by base proximity, paygrade-aware BAH cap, and commute time. Read neighborhood guides for Virginia Beach, Norfolk, Chesapeake, Suffolk, Hampton, Newport News, Williamsburg, and the Peninsula communities. Use the mortgage calculator to compare conventional, FHA, VA, USDA, and jumbo loan scenarios side by side. When you are ready to talk, the contact form goes directly to a specialist who knows the area, the lenders, and the timing.