Over the past several years, Canadians have watched the cost of everything climb: groceries, housing, fuel, childcare, and interest rates on mortgages. Inflation has reshaped household budgets across the country. But most couples don’t realize that inflation also affects their prenup.
Fixed-dollar amounts in a marriage contract don’t adjust themselves. If your prenup was signed five years ago with specific numbers baked in, those numbers may no longer reflect economic reality. Here’s what to watch for and how to protect yourself.
The Problem With Fixed Dollar Amounts
Many prenups include specific dollar figures: spousal support of $2,000 per month, a property buyout price of $300,000, or a lump-sum payment of $50,000 in the event of separation. These numbers made sense when the agreement was signed. But inflation erodes purchasing power over time. $2,000 per month in 2020 had significantly more buying power than $2,000 per month in 2026.
If your prenup is full of fixed-dollar terms and you signed it a decade ago, those terms may no longer produce the fair outcome both parties intended.
Cost-of-Living Adjustment Clauses
The simplest solution is to include a cost-of-living adjustment (COLA) clause in your prenup. A COLA clause ties fixed-dollar amounts to the Consumer Price Index (CPI), which is published monthly by Statistics Canada. As inflation rises, the amounts in your prenup adjust automatically.
For example, instead of “spousal support of $2,000 per month,” the clause might read “spousal support of $2,000 per month, adjusted annually based on the change in the All-Items CPI for Ontario as published by Statistics Canada.” This ensures the amount maintains its purchasing power over time.
Interest Rates and Your Mortgage
Rising interest rates have a direct impact on household finances and, by extension, on how prenup terms play out in practice. If your prenup specifies that one partner will buy out the other’s share of the matrimonial home, the cost of financing that buyout is much higher when interest rates are elevated.
A prenup can anticipate this by specifying the valuation date, the method for determining buyout terms, and whether interest rate conditions are factored into the calculation. Without these provisions, a buyout that was affordable when rates were 2% may become impractical at 5%.
Real Estate Values and Equalization
Inflation has driven Canadian real estate values to unprecedented levels, particularly in Ontario. A home that was worth $500,000 when you signed your prenup may now be worth $900,000. If your prenup addresses the home with specific dollar thresholds rather than percentage-based formulas, those thresholds may no longer produce fair results.
The solution is to use percentage-based or formula-based clauses rather than fixed dollar amounts wherever possible. This ensures the terms scale with actual values rather than becoming outdated.
When to Review Your Prenup
If you signed your prenup more than five years ago, or if there has been significant inflation since the signing date, it’s worth reviewing the agreement to ensure the terms still reflect your intentions. You can amend specific clauses without rewriting the entire agreement. Both partners must agree to the changes, and the amendment must be in writing, signed, and witnessed.
For more on building flexible features into your agreement, visit How It Works to learn how I Do Prenup handles these scenarios.
Make sure your prenup keeps up with the economy. Start at I Do Prenup.
Frequently Asked Questions
Q: Does inflation affect my prenup?
Yes. Fixed-dollar amounts in a prenup lose purchasing power over time. Including a cost-of-living adjustment clause tied to CPI prevents this erosion.
Q: What is a COLA clause?
A cost-of-living adjustment clause ties fixed amounts in your prenup to the Consumer Price Index, ensuring they adjust automatically with inflation.
Q: Should I review my prenup if it’s more than five years old?
Yes, especially if there has been significant inflation or changes in interest rates since it was signed. An amendment can update outdated terms.