Best 3/1 ARM Mortgage Rates June 2026 | As Low As 4.25%
Brian McKay
Brian McKay
Founder & Data Architect- Automated Online Rate Data Aggregation
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Today's 3/1 ARM mortgage market includes offers such as Actors Federal Credit UnionActors Federal Credit Union165 W 46th St, Chicago, CA 10036 1308B+4.8 ★Texas Ratio: 16.47% offering 3/1 ARM at 4.25%, and 802 Credit Union802 Credit Union105 Westminster St, Barre, VT 05001 4720A+5.0 ★Texas Ratio: 5.65% offering 3/1 ARM at 4.50%, and FreeStar Financial Credit UnionFreeStar Financial Credit Union10636 Gratiot Ave, Casco, MI 48021 2312A5.0 ★Texas Ratio: 8.12% offering 3 Year ARM at 0.00%, and Evergreen Credit UnionEvergreen Credit Union133 N Richmond St, Appleton, WI 54911 4635A+5.0 ★Texas Ratio: 3.34% offering 3 Year ARM at 4.99%, and Alabama Credit UnionAlabama Credit Union1 Mercedes Dr, Birmingham, AL 32507 8703A5.0 ★Texas Ratio: 5.87% offering 3/1 ARM, First Mortgage at 5.00%.
A 3/1 ARM offers a fixed interest rate for the first 3 years, then adjusts annually based on a market index. It typically carries a lower initial rate than 30-year fixed mortgages, making it well suited for borrowers who plan to sell or refinance before the adjustment period begins.
3/1 ARM rates reflect the initial fixed-rate period. Your rate will adjust after 3 years based on market conditions. Last Updated and Verified: June 21, 2026
Compare 3/1 ARM Mortgage Rates Today
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As Low As; A 3-year ARM with an APR (annual percentage rate) as low as 5.250% for $100,000.00 (20% down/80% LTV) would have a monthly payment of $552.20.
Annual Percentage Rate. APR includes $399 in origination costs. Estimated closing costs of $800 and may be financed. Proof of property insurance is required prior to closing. Rates effective 05/29/2026. APR is based on <= 80% loan to value. Terms up to 30 years. First mortgage rates available for 80.01 - 90% loan to value.
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80% Loan to Value
Up to 1.0 points**
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APR is based on a loan to value less than 80%. Terms up to 30 years on loans greater than $50,000. Other affordable terms apply. For lowest rates, checking with direct deposit and automatic payments required at Evergreen Credit Union. Contact a loan officer for details. Rates effective 05/29/2026.
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±3% Tri-Annual Cap, ±5% Lifetime Cap
Rates effective as of 6/15/2026, 10:56:34 AM (ET). Rates are subject to change without notice based on market changes. Rates are based on a 45 day lock.
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As Low As; 3/1
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For # of months: 36
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Fixed for 3 years and then adjusts yearly.
Rates and APRs effective October 3, 2025 and are subject to change without notice. Rates, APR, payments, and fees are based on 25% down payment and excellent credit history. Your actual interest rate, APR, payment, and fees may be different than what is displayed here and will be based on several factors, including but not limited to: your credit history, property type, and transaction type. All mortgages and home equity loans require property insurance. Adjustable Rate Mortgages (ARM): rates may be subject to increase after consummation. ARM terms available. Your interest rate cannot increase or decrease more than 2 percentage points at first adjustment and 2 percentage points per subsequent adjustment from the initial interest rate excluding any buydown. Your interest rate will never be greater than 5 percentage points above the initial interest rate or lower than 2.75%.
Consumer Handbook; Disclosures
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Example Payment: 180 monthly payments @ $8.37 per $1,000 borrowed
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36 monthly payments of $5.76, 324 monthly payments of $7.08
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Origination Fee: $4,425
Rate Caps: 2%/2%/5%; Fully Indexed Rate: 6.340%
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Example Payment: 360 monthly payments @ $5.99 per $1,000 borrowed
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Fixed for 3 years, variable for the next 27 years (adjusts annually). Loan Amounts: Up to $2,000,000. Rate Caps: Max 2% change after the initial fixed period. Max 2% change per year after each subsequent adjustment. Max interest rate: Initial Rate + 6%. Payment example for a $400,000 loan: initial fixed payment $2,430.44 for 36 months, first adjustment at 36th month, rate no more than 8.125% with estimated fixed payment $2,934.18 for 12 months, second adjustment at 48th month, rate no more than 10.125% with estimated fixed payment $3,462.82. Rates increase no more than 6% above the initial start rate over the life of the loan and a maximum rate of 12.125%, with an estimated maximum payment of $4,009.85. Index rate for the One-Year Treasury Constant Maturity is 4.65%.
Fully Indexed Rate %: 6.875%
Initial Rate: 6.500%
Conform / Jumbo: Up to $806,500
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Conform / Jumbo: Over $806,500
Index: MIRS Transition Index; Caps: Life: Max+6%, Min3.0%
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For # of months: 36
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±3% Tri-Annual Cap, ±5% Lifetime Cap
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3/1 ARM Mortgage Rate Trend
Daily average rates across all mortgage types
Daily mortgage rate averages compiled from our database of 8,500+ banks and credit unions — updated daily.
The 3/1 ARM rate fell 0.116 points over the past 7 days to 6.203%, down from 6.320% last week.
ARM Mortgage Calculators
Methodology & Data Sources
Direct-Sourced & Verified Rate Data: Every 3/1 ARM rate on this page is sourced directly from the official website of the lending institution. Adjustable-rate mortgage rates reflect the initial fixed-rate period and are verified daily.
Coast-to-Coast Lender Coverage: Our database monitors over 8,500 banks and credit unions across all 50 states, capturing a diverse mix of community credit unions, regional banks, and online lenders. This breadth ensures you see competitive rates that many rate surveys miss.
Time-Stamped for Full Transparency: Because 3/1 ARM rates can shift multiple times per week in response to economic conditions and Federal Reserve policy changes, every rate entry carries its own specific "last updated" date. You always know exactly how fresh the data is.
Proprietary Lender Safety Ratings: Rate alone is only part of the picture. MonitorBankRates evaluates the financial stability of every listed institution using regulatory FDIC and NCUA data. Our composite Health Grades (A+ to F), Star Ratings, and Texas Ratio calculations give you a clear view of lender stability so you can borrow with confidence from a financially sound institution.
Frequently Asked Questions About 3/1 ARM Rates
What is a 3/1 ARM?
How does the rate adjustment work after the 3-year fixed period?
What are rate caps on a 3/1 ARM?
Who is a 3/1 ARM best suited for?
How does a 3/1 ARM compare to a 5/1 or 7/1 ARM?
How does a 3/1 ARM compare to a 30-year fixed mortgage?
What happens if I stay in the loan past the 3-year fixed period?
What is the difference between interest rate and APR on a 3/1 ARM?
How are 3/1 ARM rates determined?
What are today's best 3/1 ARM rates?
- Actors Federal Credit Union: 4.25% (3/1 ARM)
- 802 Credit Union: 4.50% (3/1 ARM)
- FreeStar Financial Credit Union: 0.00% (3 Year ARM)
- Evergreen Credit Union: 4.99% (3 Year ARM)
- Alabama Credit Union: 5.00% (3/1 ARM, First Mortgage)
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