Should you fix your mortgage interest rate or stay on a variable rate?

Question

Rich Dad · Accepted Answer

A fixed mortgage is like wearing a helmet in your living room — safe, but are you actually in danger?
Let’s get something straight: a mortgage isn’t just a bill — it’s leverage. If you’re borrowing $400,000 at 5%, you’re controlling a large asset with relatively little of your own money. The real question isn’t “fixed or variable?” It’s: What are interest rates likely to do, and how flexible do you need to be?
Historically, variable rates often cost less over the long run. In many markets, variable borrowers have paid 0.5–1.0% less on average over decades compared to fixed. On a $400,000 loan, that’s $2,000–$4,000 per year — real money. Over 10 years, that’s potentially $20,000–$40,000 you could invest elsewhere at 8–10% returns. That spread compounds.
But here’s the real power move: flexibility. Variable loans often allow extra repayments without penalties and easier refinancing. If rates drop from 6% to 4.5%, you benefit immediately. Fixed-rate borrowers? They’re stuck unless they pay hefty break fees. In 2020–2021, variable borrowers who refinanced aggressively slashed payments while fixed borrowers had to sit tight.
Now let’s be honest. Variable can hurt in the short term. If rates rise 1%, your $400,000 loan could cost about $250 more per month. That stings. But smart borrowers plan for that. If you can comfortably afford payments at 2% higher than today’s rate, you’re not gambling — you’re positioning.
Fixed rates make sense if you’re highly leveraged and cash flow is tight. If a 1% rise would push you into stress, don’t pretend you’re a hedge fund manager. But if you have emergency savings (6–12 months expenses), growing income, and optionality? Variable is often the more profitable long-term play.
And here’s the kicker: banks price fixed rates to protect themselves. They build in buffers. When you fix, you’re often paying for insurance — insurance that may never pay out. Ask yourself: do you want certainty, or do you want upside?
Wealth builders don’t avoid risk. They manage it. If you’re stable, diversified, and thinking long term (10+ years), variable often wins the math game. If you’re stretched thin and value sleep over spread, fix it — but know you’re paying for that comfort.
If you can afford volatility, take it — volatility is often where profit hides.

Poor Dad · Answer

Peace of mind is worth more than a few basis points.
A home is not a trading strategy. It’s where you sleep, raise children, and build stability. When you choose between fixed and variable, you are choosing between certainty and uncertainty — and certainty has value, especially in a rising-rate environment.
Let’s look at numbers calmly. Suppose you have a $400,000 mortgage at 5% variable. If rates rise to 7%, your monthly payment could increase by roughly $500–$600 depending on the term. That’s $6,000–$7,000 per year. For many households, that’s the vacation fund, emergency savings, or even grocery money. In 2022–2023, many variable borrowers saw exactly this happen. Some experienced payment shock of 30–40% increases.
A fixed rate protects your budget. If you fix at 5.5% for 3–5 years, you know exactly what you owe every month. That allows you to plan, save, and invest consistently. Stability supports discipline. It’s easier to contribute $500 per month to retirement when you’re not worried about your mortgage jumping unexpectedly.
Now, it’s true that historically variable rates have sometimes been cheaper over long periods. But history doesn’t pay your bills — your current income does. If you are early in your career, have one income in the household, or carry other debts (car loan, student loans, credit cards), adding interest rate risk is unnecessary.
Consider this scenario: You fix at 5.5%, and variable drops to 4.5% next year. You “lose” 1% for a while. On $400,000, that’s about $4,000 per year. That’s frustrating — but manageable. Compare that to variable rising to 7% and costing you $7,000 extra unexpectedly. Which scenario threatens your financial security more?
Also remember penalties. Fixed loans may charge break fees, but they also protect you from central bank volatility. If inflation spikes or global markets shift, your household remains insulated. Think about your pension, your children’s education, and your stress levels.
In uncertain economic cycles, especially if rates are historically low relative to long-term averages (which have often ranged 6–8%), fixing can be prudent. You are not trying to beat the bank — you are trying to build a stable life.
Security isn’t exciting — but it keeps the lights on.

Should you fix your mortgage interest rate or stay on a variable rate?

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