Fixed vs Adjustable Rate Mortgage (2026 Guide)

Compare fixed-rate and adjustable-rate mortgages to find which option is right for you. Calculate potential savings and understand the risks.

Fixed vs ARM Comparison Calculator

Loan Amount

Fixed Rate (%)

ARM Initial Rate (%)

ARM Initial Period (years)

Fixed Rate Payment

$2,097.64

ARM Initial Payment

$1,798.65

Monthly Savings (ARM vs Fixed)+$298.99

ARM After Adjustment$2,315.45

Adjusted Rate8.00%

Quick Answer

As of 2026: Fixed-rate mortgages offer stability with current rates around 7.2%, while ARMs offer lower initial rates (around 5.8%) but carry adjustment risk. Choose fixed if you want predictability, ARM if you plan to move soon.

Key Differences

Fixed-Rate Mortgage

•Interest rate stays the same for entire term
•Monthly payment is predictable and stable
•Better for long-term homeowners (10+ years)
•Higher initial rate compared to ARM
•No risk of payment increases

Adjustable-Rate Mortgage

•Rate adjusts after initial fixed period
•Lower initial rate, but payments can increase
•Better for short-term homeowners (<5 years)
•Potential for lower rates in falling rate environment
•Rate caps limit how much rate can increase

Comparison Table

Feature	Fixed-Rate	Adjustable-Rate
Initial Interest Rate	Higher	Lower
Payment Stability	Predictable	Variable
Rate Risk	None	Moderate
Best For	Long-term	Short-term
Early Repayment Penalty	Rare	Possible

Recommended Choice by Situation

Situation	Recommended Option	Why
Plan to stay > 10 years	Fixed-Rate	Stability is more important than initial savings
Plan to stay 3-10 years	ARM (5/1 or 7/1)	Lower initial payments before move/refinance
Plan to stay < 3 years	ARM (3/1)	Maximize savings during short ownership

ARM Risk Warning

Important Considerations

• ARM rates can increase after the initial fixed period
• Your monthly payment could rise significantly
• Rate caps provide some protection, but payments can still increase
• Make sure you can afford potential payment increases

Frequently Asked Questions

What is the difference between fixed and adjustable rate mortgages?

A fixed-rate mortgage has an interest rate that remains constant for the entire loan term, providing predictable monthly payments. An adjustable-rate mortgage (ARM) has a fixed rate for an initial period (e.g., 3, 5, 7, or 10 years) and then adjusts periodically based on market indices.

When should I choose a fixed-rate mortgage?

Choose a fixed-rate mortgage if you plan to stay in your home for a long time (10+ years) or if current interest rates are low and you want payment stability. Fixed-rate mortgages are also better if you prefer predictable budgeting.

When should I choose an adjustable-rate mortgage?

Choose an ARM if you plan to sell or refinance before the initial fixed period ends, or if you expect interest rates to decrease. ARMs typically offer lower initial rates but carry the risk of rate increases in the future.

What is a hybrid ARM?

A hybrid ARM combines features of both fixed and adjustable rates. It has a fixed rate for an initial period (e.g., 5/1 ARM means 5 years fixed, then adjusts annually) and then adjusts periodically based on market conditions.

What is the margin on an ARM?

The margin is a fixed percentage added to the index rate to determine your ARM interest rate. For example, if the index is 4% and the margin is 2.5%, your rate would be 6.5%. The margin remains constant throughout the loan term.

What are the current fixed vs ARM rates in 2026?

As of 2026, 30-year fixed rates average around 7.2%, while 5/1 ARM initial rates average around 5.8%. This represents a savings of about 1.4% during the initial fixed period.

What happens if ARM rates go up?

If ARM rates increase after the initial fixed period, your monthly payment will increase. Most ARMs have rate caps that limit how much the rate can increase at each adjustment and over the life of the loan.

Can I convert an ARM to a fixed-rate mortgage?

Yes, you can refinance an ARM to a fixed-rate mortgage at any time. Many homeowners do this before their ARM adjusts to lock in a predictable payment.

What is an ARM index and margin?

The index is a benchmark interest rate (like SOFR or CMT) that reflects market conditions. The margin is a fixed percentage added to the index. Your ARM rate = index + margin.

What are ARM rate caps?

Rate caps limit how much your ARM rate can increase. Common caps include: initial adjustment cap (often 2%), periodic adjustment cap (often 1%), and lifetime cap (often 5% over the initial rate).

Is it better to get a 15-year fixed or 30-year fixed?

A 15-year fixed has higher monthly payments but saves significantly on interest. A 30-year fixed has lower monthly payments but costs more over time. Choose based on your budget and financial goals.

How do I decide between fixed and ARM?

Consider your time horizon, risk tolerance, and financial goals. If you plan to stay < 5 years and want lower payments, ARM may be better. If you want stability and plan to stay long-term, fixed is better.

Always consult with a qualified mortgage professional before making financial decisions.