Fixed vs. Adjustable-Rate Mortgage: What’s the Difference

Mario R
Dec 23, 2025
4 min read

When it comes to buying a home, understanding your mortgage options is crucial. In Canada, the two most common types of mortgages are fixed-rate mortgages and adjustable-rate mortgages (ARMs). Each has its own advantages, drawbacks, and considerations. Knowing the difference can help you make an informed decision that fits your financial situation and long-term goals.

What is a Fixed‑Rate Mortgage?

A fixed‑rate mortgage has an interest rate that remains constant throughout the loan term. This means your monthly payments for principal and interest remain the same, offering predictability and stability in your budget.

Advantages of a Fixed‑Rate Mortgage

Payment stability: Your monthly mortgage payments will not change, even if interest rates rise.
Budgeting ease: Since payments are predictable, planning for long-term expenses is easier.
Simplicity: Fixed‑rate mortgages are easy to understand and require less monitoring than ARMs.

Also read: Is A 5-Year Fixed Mortgage Right for You?

Potential Drawbacks

Higher initial payments: Fixed‑rate mortgages often have higher rates than the initial rate of an ARM.
Missed opportunities: If interest rates drop, your rate will not decrease unless you refinance, which comes with closing costs.

Typical Terms

Common terms include 30 years, 20 years, and 15 years.
Longer terms offer lower monthly payments but result in more interest paid over the life of the loan.
Shorter terms have higher monthly payments but lower total interest costs.

A fixed‑rate mortgage is ideal for borrowers who value predictability and want to lock in their interest rate for the long term.

What is an Adjustable‑Rate Mortgage

An adjustable‑rate mortgage (ARM) has a variable interest rate. This means that after an initial fixed period, the interest rate may increase or decrease based on market trends.

How Do ARMs Work?

Initial period: ARMs typically start with a lower interest rate than fixed‑rate mortgages. This period can last from one to seven years depending on the loan.
Adjustment periods: After the initial period, the interest rate adjusts at regular intervals. This could be annually, every few years, or monthly depending on your agreement.
Rate calculation: Adjustments are tied to a benchmark index (e.g. SOFR, LIBOR) plus a fixed margin agreed upon at signing.
Caps and ceilings: Most ARMs have limits on how much the rate can increase per adjustment and over the life of the loan.

Pros of ARMs

Lower initial payments: Ideal for those looking to save money in the early years.
Potential savings: If interest rates drop, monthly payments can decrease without refinancing.
Flexibility: Suitable for buyers planning to move or refinance before rates increase.

Cons of ARMs

Payment unpredictability: Monthly payments may rise significantly if interest rates increase.
Complexity: Understanding indexes, margins, and caps is essential to avoid surprises.
Financial risk: If payments increase beyond what you can afford, foreclosure is possible.

Also read: What Is the Best Strategy for Buying a First Home in Canada?

Key ARM Variations

5/5 ARM: Fixed interest rate for the first 5 years, then adjusts every 5 years thereafter.
Hybrid ARM: Remains fixed for an initial period (e.g. 3, 5, or 7 years), then adjusts annually based on market conditions.
Interest‑Only Mortgage: Only interest is paid for a certain number of years, leading to lower initial payments but slower principal repayment.

When to Choose a Fixed‑Rate Mortgage?

A fixed‑rate mortgage may be the right choice if:

You want predictable monthly payments.
You plan to stay in your home long-term.
You are concerned about rising interest rates.
You prefer a simple and straightforward mortgage.

When to Consider an ARM?

An adjustable‑rate mortgage may work for you if:

You plan to live in the home for a shorter period (e.g. 5–7 years).
You want to take advantage of initially lower rates.
You expect your income to increase over time.
You are comfortable with payment fluctuations based on market rates.

Tips for Choosing the Right Mortgage

Assess your budget: Determine what monthly payment you can comfortably afford.
Consider your plans: Think about how long you intend to stay in your home.
Analyze interest rate trends: Research current and predicted rates.
Compare scenarios: Calculate payments for different rates, terms, and ARM adjustments.
Consult a professional: Mortgage brokers or financial advisors can guide you through options and provide personalized advice.

Why Choose GNE Mortgages?

Navigating mortgage options can be complex — especially when deciding between fixed‑rate and adjustable‑rate loans. That’s where we come in. As a trusted mortgage consultant, We offer:

Expert Advice: Our team knows the Canadian mortgage market inside out. We help you understand the nuances between fixed and adjustable rates and choose what works for your situation.
Personalized Guidance: We review your financial goals, income, and risk tolerance to recommend the best mortgage structure.
Access to Competitive Rates: Through our network of lenders, we secure competitive rates and favourable terms to suit your needs.
Transparent Process: No jargon, no hidden fees — just clear advice and full disclosure.
Support from Start to Finish: From pre-approval to closing, we handle all the paperwork and guide you through every step.

Book your appointment today With GNE Mortgages, you’re not just getting a loan — you’re getting a partner committed to helping you make the best financial decision for your homeownership journey.