If you hold a valuable commercial lease for your business in Ontario, any increase in its value during your marriage could be subject to division during a divorce. To properly protect it, your marriage contract must explicitly exclude the lease, its underlying value, and any future renewals from your Net Family Property (NFP) calculation.
Protecting Your Business Premises in an Ontario Marriage Contract
For many small business owners, a long-term commercial lease is one of their most valuable assets. Whether you operate a restaurant in Toronto, a clinic in Mississauga, or a retail shop in Ottawa, securing a favourable lease rate gives your business a major competitive advantage. Under the Ontario Family Law Act, any increase in the value of that lease during your marriage-especially if it is locked in at below-market rent-can be considered property. If you divorce, your spouse may be entitled to half of that accumulated increase in value. 💵
A well-drafted marriage contract (commonly known as a prenup) can ensure your business operations remain strictly yours. By creating an impenetrable legal barrier around your commercial lease, you prevent it from being leveraged in Family Court. Because corporate and family law intersect in complex ways, working with a specialized family lawyer from our directory is essential to safeguarding your livelihood. ⚖
Step-by-Step Process: Shielding a Commercial Lease in Ontario
Protecting a commercial asset requires more than just a vague statement saying “I keep my business.” You must follow strict legal procedures to ensure the exclusion holds up in court. Here is the general process for protecting a commercial lease. 📝
Step 1: Formally Value the Commercial Lease
Before you can exclude an asset, you generally must know what it is worth. If your lease allows you to pay $3,000 CAD per month in an area where current market rent is $6,000 CAD, that $3,000 monthly difference over a ten-year lease holds immense financial value. A chartered business valuator (CBV) may need to provide a formal assessment of this “leasehold interest.” 📊
Step 2: Complete Full Financial Disclosure
An Ontario prenup can be thrown out by a judge if either party hides assets. You must provide your future spouse with a complete copy of the commercial lease agreement, the valuation report, and any documents related to options to renew. Transparency is your best defence against future legal challenges. 📄
Step 3: Draft Specific Exclusion Clauses
Your lawyer will draft a specific clause explicitly identifying the commercial lease. The contract must state that the lease, any leasehold improvements (like renovations you paid for), and any future renewals or relocations of the business are entirely excluded from the calculation of Net Family Property. 🔒
Step 4: Protect Against the Commingling of Funds
To keep the lease protected, you must operate your business cleanly. If you use joint marital funds or money from a shared bank account to pay the commercial rent or fund leasehold improvements, your spouse could later argue they acquired an interest in the business. Keep your business and personal finances strictly separate. 💰
Step 5: Obtain Independent Legal Advice (ILA)
For the marriage contract to be legally binding in Ontario, both you and your future spouse must receive Independent Legal Advice. This means you each must hire your own separate lawyer to review the contract before signing. This proves nobody was forced into the agreement. 🤝
How Much Does This Process Cost in Ontario?
Protecting a commercial lease requires careful drafting, making it slightly more expensive than a basic prenup. However, this upfront cost is a fraction of what you could lose in a messy divorce. As of May 2026, here are the estimated costs. 💵
| Service | Estimated Cost in CAD |
|---|---|
| Business Valuation (Leasehold Interest) | Usually ranges from $1,500 to $3,500 CAD depending on complexity. |
| Drafting the Marriage Contract | Typically costs between $2,500 and $5,000 CAD for a business owner. |
| Independent Legal Advice (For your spouse) | Usually $500 to $1,500 CAD for their lawyer to review and sign the certificate. |
How Long Does the Process Take?
Do not wait until the week before your wedding to start this process. Gathering business documents, obtaining a valuation, and negotiating the terms with two separate law firms usually takes between 2 to 4 months. Signing a contract too close to the wedding date can lead a judge to invalidate it due to duress. ⏳
Frequently Asked Questions (FAQ)
What if my commercial lease expires and I renew it after marriage?
If your marriage contract is drafted correctly, it should include a “tracing” or “replacement property” clause. This ensures that any renewals, extensions, or even relocations of the original business remain protected.
Can my spouse demand a share of my business profits instead?
Yes, unless your prenup also specifically excludes the business entity itself (the shares of your corporation or your sole proprietorship) and the income it generates from spousal support calculations.
Do we have to update the contract if I sell the lease?
If you sell the lease to another business, the money you receive will remain exempt as long as the contract includes a clause stating that proceeds from the sale of excluded property remain excluded.
What happens if we work in the business together?
If your spouse contributes significant unpaid labour to the business, they might make a ‘trust claim’ for a share of its value, regardless of the prenup. It is best to pay them a fair market salary if they work for you.
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