Mixed-rate mortgages

How mixing works and what it does

A mixed-rate mortgage splits your borrowing between a variable-rate portion and a fixed-rate portion — for example half and half. If rates rise, only the variable half is affected; if rates stay low, you still benefit on that half. This reduces concentration in either rate type, which some borrowers find psychologically and financially steadying. But mixing does not guarantee the lowest total cost: it is a deliberate middle path, and a pure variable loan would be cheaper if rates stay low while a pure fixed loan would be cheaper if rates rise sharply.

The complexity cost

The trade-off is management complexity. You hold two sets of assumptions — the variable portion’s reset behavior and the fixed portion’s term — and prepayment, refinancing, and stress-testing must consider both. For most borrowers a clear choice between fixed and variable, matched to their reserves and risk tolerance, is simpler and easier to monitor. Consider mixing only if you specifically want to hedge and are comfortable tracking two structures over decades.

Key points to carry away: The loan is split into a variable portion and a fixed portion; It reduces concentration in either rate type but adds management complexity; Mixing does not guarantee the lowest total cost — it is a middle path; You must manage two sets of assumptions and two reset behaviors. Use the linked guides and calculators for the full decision, and confirm anything material with the lender, a licensed broker, a judicial scrivener, or a tax accountant before you act.