Fixed or Variable Rate Mortgage for Rental Property?

The choice between a fixed and variable rate mortgage is one of the most consequential financing decisions you'll make on a rental property. Get it right and your cash flow is predictable for years. Get it wrong and a single rate shock can flip a profitable property into a monthly loss. The right answer depends less on what rates are doing today and more on how long you plan to hold and how much volatility your cash flow can absorb.

What "fixed" actually buys you

A fixed-rate mortgage locks your interest rate for the entire term — typically 15, 20, 25, or 30 years depending on the market. Your principal-and-interest payment never changes. For a landlord, that predictability is enormously valuable. You can quote rent, build a budget, and stress-test the deal knowing exactly what the bank will collect every month for the life of the loan.

The cost of that certainty is a higher starting rate. Lenders charge a premium for taking interest rate risk off your shoulders.

What "variable" really means

Variable (or adjustable) rate mortgages start with a lower rate, often fixed for a short initial period (1, 3, 5, or 7 years), after which the rate resets periodically against a reference index. If rates fall, you benefit. If rates rise, your payment increases — sometimes substantially.

For a primary residence, variable rates can make sense if you expect to move or refinance before the first reset. For a rental property you intend to hold long term, variable rates introduce a risk that compounds over decades.

A worked example

Consider a $250,000 loan at either a 6.5% fixed rate or a 5.0% variable rate that resets after five years.

• Fixed: ~$1,580/month for 30 years. You know that number forever.
• Variable starting at 5.0%: ~$1,342/month for the first five years — a savings of $238/month, or roughly $14,300 over the initial period.

If rates stay flat or fall, the variable wins. If the variable rate resets to 7.5% in year six, the new payment becomes ~$1,747/month — $167/month MORE than you would have paid on the fixed loan, and the gap continues for the remaining 25 years. A modest 2.5% rate jump erases the early savings within roughly seven years and then keeps costing you for two decades.

How to decide

Ask yourself three questions:

1. How long will you hold this property? Anything beyond 7 years tilts strongly toward fixed. 2. Can your cash flow absorb a 30–50% increase in mortgage payments? If not, fixed is the only safe choice. 3. Where are rates in the long-term cycle? When rates are historically low, locking is a gift to your future self. When rates are historically high, a shorter fixed period or variable becomes more defensible.

For most buy-and-hold landlords in 2026, the predictability of fixed-rate financing outweighs the modest savings of variable. The peace of mind alone — knowing one number on your spreadsheet will never change — is worth the premium.