ARM Rates 2026: Adjustable-Rate Mortgage Rates — 5/1, 7/1 & 10/1 ARMs Explained

Adjustable-rate mortgages (ARMs) offer lower initial rates than fixed-rate mortgages in exchange for rate uncertainty after the initial fixed period. On October 14, 2026, Mortgage News Daily’s 7/6 SOFR ARM index was 6.85%, compared to 7.45% for its 30-year fixed index — a discount of 0.60 percentage points that works out to about $162 a month on a $400,000 loan during the fixed period.

Current ARM Rates — October 2026

ARM Rates vs Fixed Rates

Rates are survey averages, not offers. Your actual rate depends on credit score, down payment, and lender. The sources used here publish only a 7/6 SOFR ARM, so this page does not list rates for 5/1, 5/6 or 10/1 ARMs.

Key insight: On the MND figures, the 7/6 ARM saves $162/month vs the 30-year fixed — $13,620 over the 7-year fixed period (payment difference only).

How Adjustable-Rate Mortgages Work

An ARM has two distinct phases:

Phase 1: Fixed-Rate Period (5, 7, or 10 Years)

Your rate and payment are locked. This functions exactly like a fixed-rate mortgage — you have complete payment certainty during this period.

Phase 2: Adjustable Period (Starts Year 6, 8, or 11)

The rate adjusts annually (or semi-annually for /6 ARMs) based on:

New Rate = Index + Margin

• Index: Usually SOFR (Secured Overnight Financing Rate), the market benchmark that replaced LIBOR
• Margin: A fixed percentage your lender adds, typically 2.5%–3.0%
• Caps: Limits on how much the rate can change

ARM Rate Caps — Critical Protection

Rate caps are your protection against runaway rate increases. The cap structure is written as three numbers: 2/2/5 or 5/1/5.

Example with 2/2/5 caps on a 7/6 ARM starting at 6.85%, $400K loan (worst case; payment is re-figured on the remaining balance and remaining term at each step):

Example with 5/1/5 caps (less common):

Always ask your lender for the cap structure before signing — this is disclosed on the Loan Estimate.

5/1 ARM vs 7/1 ARM vs 10/1 ARM — Which to Choose?

A longer fixed period gives more years of certainty. The surveys used on this page do not publish separate rates for each term, so compare Loan Estimates from lenders to see how the start rate changes with the fixed period.

5/1 ARM vs 5/6 ARM: What’s the Difference?

The 5/1 ARM adjusts once per year after year 5.
The 5/6 ARM adjusts every 6 months after year 5.

Which is better? The 5/6 ARM adjusts twice as often, creating more payment volatility, and either type can start lower or higher than the other depending on the lender. Most borrowers prefer the 5/1 for simplicity.

ARM Payment Scenarios — Real Examples

All scenarios use a $400,000 loan on a 7/6 ARM at 6.85% (MND index, October 14, 2026) compared with a 30-year fixed at 7.45%. Payments are principal and interest only.

Scenario 1: Sell Before Adjustment (Best Case)

Loan: $400,000 7/6 ARM at 6.85%
Monthly P&I: $2,621 (vs $2,783 on the 30-year fixed)
Action: Sell the home in year 7
Outcome: You captured all the payment savings ($13,620 over 7 years) with zero rate risk.

Scenario 2: Refinance Before Adjustment

Loan: $400,000 7/6 ARM at 6.85%
Action: Refinance at the end of year 7, assuming a fixed rate of 6.0% (a hypothetical)
Remaining balance: ~$363,731
New payment at 6.0% over 23 years: $2,433/month
Outcome: You saved money during the ARM, then locked in a fixed rate, if rates fall far enough to make that possible.

Scenario 3: Rate Rises at Adjustment (Worst Case)

Loan: $400,000 7/6 ARM at 6.85% (2/2/5 caps)
Action: Hold the loan through adjustment
Year 8: Rate rises to 8.85% (2% first cap)
Remaining balance: ~$363,731
New payment: $3,089/month (+$468)
Outcome: Payment increased significantly. You saved $13,620 over 7 years but now pay about $5,616 more per year than during the fixed period.

Scenario 4: Aggressive Paydown Strategy

Loan: $400,000 7/6 ARM at 6.85%
Action: Pay an extra $1,000/month toward principal
Remaining balance after 7 years: ~$256,333 (vs $363,731 with minimum payments)
Outcome: When the rate adjusts, you have a much smaller balance — reducing payment volatility.

When an ARM Makes Sense

✅ Good Candidates for ARMs

❌ When to Choose Fixed Instead

How ARM Rates Are Calculated After Adjustment

After the fixed period, your new rate is determined by:

Rate = SOFR Index + Lender Margin

Example Calculation (a 7/6 ARM Adjusting Today)

In this example the rate would fall from 6.85% to 6.61%, because the index plus margin is lower than the start rate. Loan terms vary; some loans have a floor that stops the rate from dropping below the start rate.

If SOFR were 7.0%:

The cap prevents the rate from jumping to 9.75% — it’s limited to 8.85%.

Should You Get an ARM in 2026?

The case for ARMs in 2026:

✅ Rates are elevated — the 30-year fixed rate (7.40%, Freddie Mac, week of October 8, 2026) is well above the 2020–2021 lows of 2.65%–3.5%. If rates normalize to 5%–6% over the next few years, you could refinance before adjustment.

✅ Meaningful savings — A 7/6 ARM at 6.85% vs a 30-year fixed at 7.45% (MND, October 14, 2026) saves $162/month on a $400K loan — $13,620 over 7 years.

✅ Shorter timelines — If you’re likely to move within the ARM fixed period, you avoid the rate adjustment entirely.

The case against ARMs:

❌ Rate risk — If rates stay elevated or rise further, your payment could increase significantly at adjustment.

❌ Uncertain economic outlook — Inflation could stay stubborn, keeping rates high.

❌ Refinance costs — If you plan to refinance before adjustment, closing costs (2%–3% of loan) eat into your savings.

ARM Qualification: What Lenders Look For

Lenders typically qualify ARMs using one of two methods:

1. Qualify at the initial rate (most common) — Your debt-to-income ratio is calculated using the ARM start rate (e.g., 6.85%).

2. Qualify at the fully indexed rate — Some lenders use the index + margin rate to ensure you can afford a higher payment. Ask your lender which method they use.

DTI limits:

• Conventional ARMs: 43%–50% DTI
• FHA ARMs: 43% DTI (with compensating factors up to 50%)
• Jumbo ARMs: 36%–43% DTI

ARM vs Fixed Rate: Side-by-Side Comparison

ARMs for Different Loan Amounts

ARM Savings Scale with Loan Size

Takeaway: ARMs make more sense on larger loans where the absolute dollar savings are significant.

ARM Refinancing: Your Options Before Adjustment

If you have an ARM approaching adjustment, you have three options:

1. Refinance to a Fixed Rate

Lock in certainty. Makes sense if fixed rates are at or below your current ARM rate.

2. Refinance to a New ARM

Reset the clock with a new 5/7/10-year fixed period. Only worth it if the new ARM rate is meaningfully lower.

3. Ride It Out

If rates have fallen and your ARM adjusts downward, or if your balance is low enough that payment changes are manageable, staying put may be best.

Use the refinance calculator to model scenarios and break-even timelines.

Related Mortgage Rate Guides

• Mortgage Rate History — Historical rates from 1971–2026
• Fixed vs Variable Rate Mortgage — ARM vs fixed decision framework
• 30-Year Mortgage Rates — Current 30-year fixed rates
• 20-Year Mortgage Rates — Middle-ground fixed-rate option
• Refinance Rates — Current refi rates by term

For broader context on mortgage types and when each makes sense, see the Mortgage Loan Types hub.

Frequently Asked Questions (Extended)

Can I pay off an ARM early?

Yes. ARMs typically do not have prepayment penalties (but verify with your lender). Paying extra toward principal during the fixed period reduces your balance before adjustment, lowering future payment volatility.

What happens if I can’t afford the payment after adjustment?

You have three options: (1) Refinance to a new loan, (2) Sell the home, or (3) Request a loan modification from your lender. Contact your lender immediately if you anticipate trouble — waiting makes options worse.

Are ARM rates negotiable?

Yes. Like all mortgage rates, ARM rates are negotiable. Shop at least 3 lenders, compare Loan Estimates, and ask lenders to match or beat competing offers. A 0.25-point rate reduction on a $400,000 loan (7.45% to 7.20%) saves about $68/month.

Do ARMs have mortgage insurance?

Conventional ARMs require PMI if your down payment is less than 20%, just like fixed-rate loans. FHA ARMs require mortgage insurance premium (MIP) for the life of the loan. VA ARMs have no mortgage insurance.

Can I convert my ARM to a fixed-rate loan?

Some lenders offer ARM-to-fixed conversion options, but they are rare. The standard approach is to refinance into a new fixed-rate mortgage. Conversion clauses typically carry fees and may not offer competitive rates — refinancing is usually better.

Bottom line: ARMs offer meaningful savings for buyers with a clear exit strategy (sell or refinance) within the fixed period. On the October 2026 index figures, a 7/6 ARM on a $400,000 loan saves about $13,600 in payments over its 7-year fixed period compared to a 30-year fixed — but only makes sense if you won’t keep the loan past the adjustment date or are confident rates will fall, allowing a favorable refinance.

Written by WealthVieu

WealthVieu researches and writes data-driven personal finance guides using primary sources including the IRS, Bureau of Labor Statistics, Federal Reserve, and Census Bureau.