Is a 5/1 ARM the Move Right Now?

The question

The 30-year fixed hit 7.28% in Freddie Mac's survey on October 1, 2026. That's the highest in a while, and a lot of buyers are asking me the same thing: should I look at an adjustable-rate mortgage instead?

Let's talk about what a 5/1 ARM really is, what it costs over five years, and who it actually makes sense for.

The straight answer

For the right buyer, a 5/1 ARM can save real money right now. For the wrong buyer, it's a risk they don't need. It comes down to how long you'll keep the loan and how much cushion you have.

What a 5/1 ARM is

• The "5" means your rate is locked for the first 5 years.
• The "1" means it adjusts once a year after that.
• Heads up: most conventional ARMs today are actually 5/6 SOFR ARMs. They're still fixed for 5 years, but then they adjust every 6 months.

When it adjusts, your new rate is the index + margin. The index is a market rate that moves around (for most new ARMs it's SOFR, a benchmark for overnight borrowing costs). The margin is a set number your lender adds, and it doesn't change after closing.

Caps limit how far your rate can move. Fannie Mae's standard 5/6 SOFR ARM uses 2/1/5 caps: up to 2 points at the first adjustment, 1 point at each one after that, and never more than 5 points above your starting rate. Some 7- and 10-year ARMs use 5/1/5.

Where rates are right now

• 30-year fixed: 7.28% (Freddie Mac, October 1, 2026)
• 5/1 ARM: 6.47% with 1.20 points (MBA weekly survey, week ending September 25, released September 30, 2026)

MBA said ARM rates were running about 80 basis points (0.80%) under fixed rates, and ARMs hit 10.3% of applications, the highest share since October 2025. Keep in mind those two numbers come from different surveys, and daily rate trackers show the gap moving around. Your real spread depends on your lender and the day you lock.

A Kaufman County example

Let's use a $350,000 home with 20% down. That's right around what a lot of Kaufman and Forney homes go for, new construction and resale. It's not the median, just a realistic price point. (For context, Redfin had Kaufman County's median sale price at $294,016 and Forney's at $334,778, three months ending August 2026.)

Assumptions (illustration only): $70,000 down, $280,000 loan, 30-year amortization on both loans, primary residence, conventional loan. Fixed at 7.28% with 0.75 points. ARM at 6.47% with 1.20 points, 2/1/5 caps, 2.75% margin. Both include an assumed $4,000 in other prepaid finance charges.

Here's what that means:

• $151.52 less a month, or $9,091.20 less paid over 5 years.
• $2,322.25 more paid down on the loan at the same time.
• That's $11,413.45 better off. Take out the extra points the ARM costs ($1,260) and it's roughly $10,153 net.

These numbers are principal and interest only. Taxes, insurance, and HOA dues come on top.

What happens at year 5

Worst case at the first adjustment: the rate jumps the full 2 points to 8.47%. The payment goes to $2,104.56. That's $340.29 more than the ARM payment and $188.77 more than the fixed. Under 2/1/5 caps it could keep climbing up to 1 point every 6 months, and the lifetime cap is 11.47% ($2,657.61/month).

If the index stays put: the 30-day average SOFR was 3.78% on October 5, 2026. Add a 2.75% margin and round, and you get about 6.50%, or $1,769.18/month. That's almost no change. But no one knows where SOFR will be in 2031.

Your other options: you can sell or refinance before the reset. Just don't count on rates being lower. I can't promise that, and nobody else can either.

Who it fits (and who should skip it)

Good fit:

• You plan to move or upsize within 5-7 years
• Military and PCS families who'll likely get orders before the reset
• Buyers who expect their income to grow
• People already planning to refinance later
• Buyers who want a lower payment now and could handle a reset

Probably skip it:

• You plan to stay forever and your budget's tight
• You don't have a savings cushion
• Rate surprises would keep you up at night

Veterans and FHA buyers: ARMs aren't only for conventional loans. VA offers hybrid ARMs, and many lenders' VA 5/1 ARMs use 1/1/5 caps (VA rules allow up to 2 points at the first adjustment and 6 for the life of the loan on 5-year hybrids). FHA has 5-year ARMs with 1/5 or 2/6 caps.

Make it safer

• Know your caps. Your Loan Estimate shows the index, margin, and caps.
• Compare APRs from several lenders. The CFPB recommends shopping around.
• Keep reserves. Plan for the worst-case payment, not the teaser.
• Ask about a seller-paid buydown on a fixed loan. When homes are sitting, a seller credit can lower your fixed rate. You get a lower payment without the reset risk.

Let's run your numbers

Every buyer's math is different. If you're looking in Kaufman, Forney, or anywhere in DFW, text me at 972-951-6987. I'll put a fixed loan and an ARM side by side for the actual house you want.

— Dylan Hernandez, USMC Gunnery Sergeant (Ret.) | dylanhernandezsellsdfw.com

Disclosures

Illustration only, not a rate quote or commitment to lend; ARM rates can increase after the fixed period; not financial advice; not all applicants will qualify.

†Rates are survey averages (Freddie Mac PMMS for the fixed rate, MBA Weekly Applications Survey for the ARM), not offered rates. APRs are estimates that assume a $280,000 loan on a $350,000 purchase price, 20% down, 30-year amortization, the points shown, and $4,000 in other prepaid finance charges. The ARM APR assumes a fully indexed rate of 6.50% (30-day average SOFR of 3.78% on Oct. 5, 2026, plus an assumed 2.75% margin, rounded to the nearest 0.125%) after month 60. Payments are principal and interest only and do not include taxes, insurance, HOA dues, or mortgage insurance. Your rate, APR, margin, and caps depend on credit, loan type, down payment, property, and the market on the day you lock.

Dylan Hernandez, Licensed Loan Officer, NMLS #2681224, One Real Mortgage, NMLS #198414. Equal Housing Opportunity. Real estate brokerage services provided by Real Broker, LLC. Dylan Hernandez, TREC #0787987. Texas Real Estate Commission Information About Brokerage Services | Texas Real Estate Commission Consumer Protection Notice

Sources (all accessed October 5, 2026)

1. Freddie Mac, Primary Mortgage Market Survey (30-year fixed 7.28%, Oct. 1, 2026): https://www.freddiemac.com/pmms
2. FRED, MORTGAGE30US (Freddie Mac series, confirms 7.28% on 2026-10-01): https://fred.stlouisfed.org/series/MORTGAGE30US
3. Mortgage Bankers Association, "Mortgage Applications Decrease in Latest MBA Weekly Survey," Sept. 30, 2026 (5/1 ARM 6.47% with 1.20 points; 30-year conforming 7.30% with 0.75 points; ARM share 10.3%; ARMs ~80 bps below fixed): https://www.mba.org/news-and-research/newsroom/news/2026/09/30/mortgage-applications-decrease-in-latest-mba-weekly-survey
4. FRED, 30-Day Average SOFR (SOFR30DAYAVG, 3.78% on Oct. 5, 2026): https://fred.stlouisfed.org/series/SOFR30DAYAVG
5. Fannie Mae, Key Dates for SOFR ARM Products (5/6 SOFR ARM: 2%/1% caps, up to +5% lifetime, 300 bps max margin; 7- and 10-year: 5/1/5): https://capitalmarkets.fanniemae.com/mortgage-backed-securities/single-family-mbs/key-dates-sofr-arm-products
6. Fannie Mae, Standard ARM Plan Matrix (Plan 4927, 5/6 SOFR ARM): https://singlefamily.fanniemae.com/media/6951/display
7. CFPB, "For an adjustable-rate mortgage (ARM), what are the index and margin, and how do they work?": https://www.consumerfinance.gov/ask-cfpb/for-an-adjustable-rate-mortgage-arm-what-are-the-index-and-margin-and-how-do-they-work-en-1949/
8. CFPB, Consumer Handbook on Adjustable-Rate Mortgages (caps, shopping lenders, Loan Estimate): https://files.consumerfinance.gov/f/documents/cfpb_charm_booklet.pdf
9. HUD, FHA Adjustable Rate Mortgage (5-year ARMs: 1/5 or 2/6 caps): https://www.hud.gov/hud-partners/single-family-203armt
10. 38 U.S.C. § 3707A, VA hybrid adjustable rate mortgages: https://www.law.cornell.edu/uscode/text/38/3707A
11. VA Lenders Handbook (VA Pamphlet 26-7), Ch. 7, Topic 6, Adjustable Rate Mortgages (5+ year hybrids: 2-point first adjustment, 6-point lifetime): https://benefits.va.gov/WARMS/docs/admin26/m26-07/chapter_7_loans_requiring_special_underwriting_guaranty_or_other_considerations.pdf (VA site blocked automated download on Oct. 5, 2026; cap language confirmed via search excerpt and 38 U.S.C. 3707A)
12. Example lender VA product matrix showing VA 5/1 ARM, 1-year CMT index, 1/1/5 caps: https://loanlockprime.com/wp-content/uploads/2026/03/VA-STANDARD-HB-PORTFOLIO-Rev-12.05.2025-LLP.pdf
13. Moomaw Realty Group (cites Redfin's $294,016 Kaufman County median sale price, 3 months ending Aug. 2026; context only): https://www.moomawteam.com/blog/mortgage-rate-7-percent-kaufman-county-buyers-2026/
14. ReStar, Kaufman County home values ($294,016, sourced to Redfin Data Center; context only): https://restar.io/home-values/texas/kaufman-county
15. Redfin, Forney, TX housing market ($334,778 median sale price, three months ending Aug. 2026; context only): https://www.redfin.com/city/6808/TX/Forney/housing-market