🏠 ARM vs Fixed Mortgage Calculator

Understanding ARM vs Fixed-Rate Mortgages

Fixed-Rate Mortgage

A fixed-rate mortgage maintains the same interest rate for the entire loan term, providing payment predictability and protection from rate increases.

Pros:

• Payment never changes - easy to budget
• Protected from interest rate increases
• Simplicity and peace of mind
• Good for long-term homeowners

Cons:

• Higher initial rate than ARMs
• Don't benefit if rates decrease
• May pay more if you move before loan term ends

Adjustable-Rate Mortgage (ARM)

An ARM offers a lower initial rate for a fixed period, then adjusts periodically based on market conditions. Commonly structured as 5/1, 7/1, or 10/1 ARMs.

Pros:

• Lower initial interest rate and payment
• Saves money if you sell/refinance before adjustment
• May benefit from falling interest rates
• Rate caps provide some protection

Cons:

• Payment can increase significantly
• Uncertainty makes budgeting difficult
• Risk of payment shock after adjustment
• Could become unaffordable if rates rise sharply

Understanding ARM Structure (e.g., 5/1 ARM)

• 5 = Initial fixed period (5 years at starter rate)
• 1 = Adjustment frequency after initial period (every 1 year)
• Example: 5/1 ARM has fixed rate for 5 years, then adjusts annually

ARM Rate Caps Explained

• Initial Adjustment Cap: Maximum rate change at first adjustment (typically 2-5%)
• Periodic Cap: Maximum rate change at subsequent adjustments (typically 2%)
• Lifetime Cap: Maximum rate increase over loan life (typically 5-6% above start rate)
• Example: 5/1 ARM at 5% with 2/2/5 caps could reach maximum 10% (5% + 5% cap)

When to Choose an ARM

• You plan to move or refinance within 5-7 years
• You expect income to increase significantly
• Interest rates are high and expected to fall
• You can afford potential payment increases
• Initial savings justify the risk for your situation

When to Choose Fixed-Rate

• You plan to stay in the home long-term (10+ years)
• You want payment certainty
• Interest rates are low
• You're on a tight budget with little room for payment increases
• You value peace of mind over potential savings

Key Questions to Ask

• How long do you realistically plan to stay in this home?
• Can you afford the worst-case ARM payment?
• What's the break-even point for savings?
• Are you comfortable with payment uncertainty?
• Do you have flexibility to refinance if needed?