How to Lower Your Mortgage Payment in Austin: FHA 5/1 ARM vs. 30-Year Fixed at a $412,000 Median Price

By Clay Byrne | Byrne Real Estate Group and Buyer’s Rate Mortgage | Sept. 27, 2026

Austin’s median home price has fallen to $412,000, but the monthly payment remains the hurdle. A lower starting rate on an FHA 5/1 adjustable-rate mortgage can trim principal and interest for the first five years. Here is the basic math.

AUSTIN, Texas | Home prices in the Austin area have spent much of 2026 moving in the direction buyers wanted. Their monthly payments have not followed at the same pace.

The median sales price across the Austin-Round Rock-San Marcos metro area fell to $412,000 in August, down 6.4% from a year earlier, according to Unlock MLS, the region’s multiple listing service. Closed sales slipped 7.3% to 2,501 homes, totaling about $1.4 billion, which works out to an average sale price near $560,000. Pending sales rose 1.5%, a sign that some buyers are returning to the table.

Inside the city limits, the picture is similar at a higher price point. The City of Austin’s median fell 4.3% to $560,000, while active listings dropped 14.5% to 4,554. Travis County’s median declined 6.4% to $489,000, and Williamson County’s fell 5.9% to $399,900.

Yet for many households, a 6% price cut does less for the monthly budget than the rate attached to the loan. That arithmetic has pushed a once-overlooked product back into conversations with lenders: the adjustable-rate mortgage, and specifically the government-insured FHA 5/1 ARM.

Austin Home Prices at a Glance, August 2026

Market	Median Sales Price	Change From a Year Earlier	Closed Sales
Austin-Round Rock-San Marcos metro	$412,000	-6.4%	2,501
City of Austin	$560,000	-4.3%	844
Travis County	$489,000	-6.4%	1,111
Williamson County	$399,900	-5.9%	855

Source: Unlock MLS, August 2026. Metro average sale price calculated from reported dollar volume and closed sales.

What Austin’s Median Price Costs Each Month: ARM vs. Fixed

Consider a buyer purchasing at each of Austin’s median prices with the FHA minimum 3.5% down payment and the 1.75% upfront mortgage insurance premium financed into the loan. The table compares monthly principal and interest on a hypothetical FHA 5/1 ARM at 6.25% (7.345% APR, with one discount point) with a hypothetical FHA 30-year fixed loan at 6.99% (7.840% APR). These are illustrations at recent market levels, not rate quotes.

Median Price	Loan Amount (3.5% Down, UFMIP Financed)	6.25% FHA 5/1 ARM	6.99% FHA 30-Year Fixed	Monthly Savings	Five-Year Savings
$412,000 (metro)	$404,538	$2,491	$2,689	$198	$11,872
$489,000 (Travis County)	$480,143	$2,956	$3,191	$235	$14,091
$560,000 (City of Austin)	$549,857	$3,386	$3,655	$269	$16,137

Principal and interest only. Loan amounts include the 1.75% upfront FHA mortgage insurance premium. Excludes annual MIP, property taxes, and homeowners insurance. The ARM example assumes one discount point paid at closing (about $3,976 at the metro median), which reduces the five-year savings accordingly.

Put another way, the rate gap rivals the year’s price decline. A buyer at the metro median saves roughly $198 a month from the lower ARM rate. The 6.4% drop in the median price, about $28,000, lowers the fixed-rate payment by roughly $184.

How Much Does a Lower Rate Save at Any Loan Size?

The savings scale with the loan. On the same 30-year loan amount, the 0.74-percentage-point lower ARM rate in this example cuts principal and interest by about 7.4% at every size.

Loan Amount	6.25% FHA 5/1 ARM	6.99% Fixed	Monthly Savings	% Lower
$300,000	$1,847	$1,994	$147	7.4%
$400,000	$2,463	$2,659	$196	7.4%
$500,000	$3,079	$3,323	$245	7.4%
$600,000	$3,694	$3,988	$293	7.4%

The lower rate also builds equity a bit faster. Because more of each payment reaches principal, a $400,000 ARM balance falls to about $373,350 after five years, compared with about $376,490 on the 6.99% fixed loan. The ARM borrower ends the fixed period with roughly $3,100 more equity while paying $196 less a month.

What Is an FHA 5/1 ARM?

An FHA 5/1 ARM is an adjustable-rate mortgage insured by the Federal Housing Administration. The rate is fixed for the first five years. After that, it resets once a year based on a published market index plus a margin set at closing.

• Fixed for 60 months. Principal and interest do not change for the first five years.
• Annual adjustments after that. The new rate equals the index plus the margin, both disclosed up front.
• Caps on every move. HUD permits a five-year FHA ARM with caps of 1 percentage point a year and 5 points over the life of the loan. A loan starting at 6.25% could never exceed 11.25%.
• A typical structure. A common FHA 5/1 ARM uses the 1-Year Constant Maturity Treasury (CMT) index plus a 2.00% margin, with a 1% cap on the first adjustment, 1% on each annual adjustment after that, 5% over the life of the loan, and a floor equal to the margin. With the 1-Year CMT at 4.51% on Sept. 24, 2026, the fully indexed rate would be 6.51%. Borrowers should confirm their exact index, margin, and caps on the Loan Estimate.
• FHA terms still apply. Down payments can be as low as 3.5% for qualified borrowers, with more flexible credit guidelines than many conventional loans.
• Rates can fall, too. If market rates decline, the first adjustment can bring the payment down.

The Risk: What Happens After Year Five

The appeal of an ARM rests on what the borrower does before the first reset. To measure the downside, consider the worst case on the metro-median loan of $404,538: the rate rises the full 1 percentage point every year after year five until it hits the lifetime cap.

Year	Worst-Case ARM Rate	ARM Payment	6.99% Fixed Payment	Cumulative ARM Advantage
1 to 5	6.25%	$2,491	$2,689	$11,872
6	7.25%	$2,729	$2,689	$11,386
7	8.25%	$2,971	$2,689	$8,003
8	9.25%	$3,214	$2,689	$1,698
9	10.25%	$3,459	$2,689	-$7,542
10	11.25% (cap)	$3,704	$2,689	-$19,722

Even under the maximum increases, the ARM borrower stays ahead in total payments until about year eight, before counting the upfront discount point. The more likely picture depends on the index: if the 1-Year CMT stayed at today’s level, the rate would reset to about 6.51% in year six, for a payment near $2,552, still below the fixed-rate payment. That leaves a window to sell, refinance, or pay down principal.

The exposure is real, however. If rates rise sharply and the borrower can neither refinance nor sell, the payment can climb well above what a fixed loan would have cost. Lenders and agents who recommend the product should show that scenario before a buyer signs.

The Mortgage Insurance Question

FHA loans carry mortgage insurance. Borrowers pay an upfront premium of 1.75% of the loan, typically rolled into the balance, plus an annual premium paid monthly. For most 30-year FHA loans with less than 5% down, the annual rate is 0.55%, or about $185 a month at the Austin metro median.

• FHA ARM vs. FHA fixed. Mortgage insurance is essentially identical, so the principal and interest savings is an apples-to-apples comparison.
• FHA ARM vs. conventional fixed. Buyers must weigh FHA mortgage insurance against conventional private mortgage insurance, or none with 20% down. The total monthly difference will not match the principal and interest savings alone.

Who the FHA 5/1 ARM Fits, and Who It Doesn’t

Buyers who may benefit:

• Those who expect to move, upsize, or relocate within five to seven years
• Early-career professionals and business owners expecting income growth
• Buyers planning to refinance if rates fall, who want the lower payment in the meantime
• Households that will direct the monthly savings toward principal or reserves
• First-time buyers who need FHA’s lower down payment and flexible guidelines

Buyers who may prefer a fixed rate:

• Those planning to stay 10 years or longer with no plan to refinance
• Retirees and others on fixed incomes with little room for payment increases
• Anyone for whom payment certainty carries real value

Other Ways Austin Buyers Are Lowering Payments

With active listings elevated and sellers negotiating, buyers have more tools than they did two years ago.

1. Seller-paid rate buydowns. In a softer market, many sellers will fund a temporary buydown, such as a 2-1, or a permanent one. A concession aimed at the rate often lowers the payment more than the same dollars taken off the price.
2. Discount points. Buyers can pay upfront to reduce the rate for the life of the loan.
3. Credit improvement before locking. A modest score increase can move the rate tier.
4. Comparing the full loan. Rate, APR, fees, and mortgage insurance together determine cost.
5. Planning a refinance. If rates fall, refinancing can lower the payment later. It should be treated as an option, not a certainty.

Why Coordination Between Agent and Lender Matters

When the buyer’s agent and lender work from the same plan, negotiations can target the concessions that do the most for the monthly payment, such as a seller-funded buydown, rather than price alone. That approach underpins the partnership between Byrne Real Estate Group and Buyer’s Rate Mortgage, which operate under the banner “One Team. One Plan.” The firm’s guiding principle: “We help you make decisions now that you’ll be thankful you made years from now.”

Frequently Asked Questions

How can I lower my monthly mortgage payment in Austin?

The largest levers are a lower interest rate, a seller-paid rate buydown, a larger down payment, and a lower purchase price. In a hypothetical example at recent rate levels, a 6.25% FHA 5/1 ARM (7.345% APR) lowers principal and interest by about 7.4% compared with a 6.99% FHA 30-year fixed loan (7.840% APR). At the Austin metro median price of $412,000 with 3.5% down, that is about $198 a month.

What is the median home price in Austin right now?

In August 2026, the median sales price was $412,000 across the Austin-Round Rock-San Marcos metro area, $489,000 in Travis County, and $560,000 in the City of Austin, according to Unlock MLS. The metro median was down 6.4% from a year earlier.

How much lower is a mortgage payment on an FHA ARM vs. a fixed rate?

In a hypothetical example, a 6.25% FHA 5/1 ARM runs about 7.4% lower in principal and interest than a 6.99% FHA 30-year fixed loan on the same loan amount. That is roughly $147 a month on a $300,000 loan, $196 on $400,000, $245 on $500,000, and $293 on $600,000. Actual rates depend on the lender, the borrower, and the day.

Is an adjustable-rate mortgage a good idea in 2026?

It can be for buyers who expect to sell, refinance, or earn more within five to seven years, since the first five years carry a lower fixed rate. Buyers who plan to stay long-term on a tight budget are usually better served by a fixed rate.

How high can an FHA 5/1 ARM rate go?

With a 1% annual and 5% lifetime cap structure, the rate can rise no more than 1 percentage point a year after year five and no more than 5 points above the starting rate over the life of the loan. A 6.25% start would cap at 11.25%.

Does an FHA ARM have mortgage insurance?

Yes. FHA loans carry an upfront mortgage insurance premium, currently 1.75% of the loan, plus an annual premium paid monthly, which is 0.55% for most 30-year loans with less than 5% down.

Can I refinance an FHA ARM into a fixed rate later?

Yes. Many borrowers refinance into a fixed-rate loan before or after the first adjustment, including through an FHA Streamline Refinance if they qualify. Approval depends on market rates, credit, and the home’s value at the time.

Clay Byrne is the founder and principal broker of Byrne Real Estate Group and owner of Buyer’s Rate Mortgage, with 29 years and more than $1 billion in transactions in the Austin market. He posts daily on the Austin market and strategies for buyers and sellers on Facebook.