In Ontario, dentists and medical professionals must use a marriage contract to explicitly exclude the shares of their side-businesses (like an equipment leasing company) from their net family property. Without this protection, you may be forced to pay your ex-spouse half of the company’s growth, potentially bankrupting your clinical practice.
Building a successful dental practice takes years of intense education, dedication, and heavy financial investment. 🦷 In Ontario, most experienced dentists separate their clinical work from their tangible assets for tax optimization and liability protection. This usually involves operating a Medicine Professional Corporation (MPC) alongside a secondary, separate holding or equipment leasing company.
While this dual-corporate structure is fantastic for your accountant in London, Ottawa, or Toronto, it can become an absolute nightmare during a divorce if you do not have a marriage contract. Under the Family Law Act, the value of the shares in your equipment leasing company is generally treated as shareable property. This guide details how to safeguard your corporate side-business and ensure your clinic remains operational by using a legally binding marriage contract as of May 2026.
Step-by-Step Process in Ontario
Protecting complex corporate structures requires precision. 📝 You cannot simply write “I keep my business” on a napkin. Family lawyers and corporate accountants must work together to build an impenetrable legal wall around your leasing company.
Step 1: Distinguish the Corporate Entities
First, your legal team must clearly map out your corporate web. The marriage contract must specifically name and distinguish between your clinical Professional Corporation (which handles patient billing) and your equipment leasing company (which owns the expensive x-ray machines and dental chairs). Both entities require individual legal protections.
Step 2: Complete a Formal Business Valuation
You must establish exactly what the leasing company is worth on the day you get married (the Date of Marriage). 📈 You should hire a Chartered Business Valuator (CBV) to appraise the equipment and the corporate shares. If you do not lock in this baseline value, it becomes incredibly difficult to prove what portion of the company’s value actually grew during the marriage.
Step 3: Draft the Exclusion Clause
This is the heart of the contract. Your family lawyer will draft a specific clause under Section 52 of the Family Law Act stating that the shares of the equipment leasing company, including any future growth in value, are entirely excluded from the calculation of your Net Family Property (NFP). This ensures your spouse has no claim to the business assets if you separate.
Step 4: Address Spousal Support and Dividends
Protecting the asset is only half the battle; you must also protect the income. 💰 Dentists often pay themselves by drawing dividends from their leasing company. The contract must clearly dictate whether the income generated by this side-business will be factored into future spousal support calculations. Many professionals choose to cap spousal support to protect their corporate cash flow.
Step 5: Mandatory Independent Legal Advice (ILA)
Because your spouse is giving up significant potential wealth by signing this contract, they must understand their rights. They are legally required to hire their own independent family lawyer to review the document. If your spouse does not receive proper ILA, an Ontario judge will likely invalidate the entire contract during a divorce proceeding.
How Much Does it Cost in Ontario?
Corporate marriage contracts require highly specialized legal expertise, making them more expensive than standard prenups. 💵 Budget for the following costs:
- Corporate Family Lawyer: Drafting a complex agreement that intersects with tax law and corporate structures usually costs between $5,000 CAD and $10,000 CAD.
- Chartered Business Valuator (CBV): A professional valuation of your equipment leasing company for the Date of Marriage baseline generally costs $3,500 CAD to $7,000 CAD.
- Independent Legal Advice: Your spouse’s lawyer will typically charge $1,500 CAD to $2,500 CAD for a thorough review and negotiation.
How Long Does the Process Take?
You cannot rush a corporate contract. ⏱ Gathering your corporate tax returns, completing the CBV appraisal, and negotiating the terms with your future spouse’s lawyer usually takes anywhere from 2 to 4 months. It is critical to start this process well in advance of your wedding to ensure the agreement is robust and free from any claims of last-minute duress.
| Asset Type | Default Ontario Law (No Prenup) | Protected via Marriage Contract |
|---|---|---|
| Clinical Equipment (Chairs, X-Rays) | Value growth is split 50/50 upon divorce. | 100% excluded. You keep your equipment. |
| Corporate Bank Accounts | Cash accumulated during marriage is shareable. | Retained earnings remain untouched in the corporation. |
| Spousal Support Claims | Based on your total combined clinical and leasing income. | Can be waived entirely or capped at a specific annual amount. |
Frequently Asked Questions (FAQ)
Can my spouse force me to sell my dental equipment in a divorce?
Without a marriage contract, a judge will not force you to hand over the physical equipment, but they will order you to pay your spouse an “equalization payment” representing half its value. If you do not have the liquid cash to pay them, you may be forced to sell the equipment or liquidate the company to raise the funds.
Does the contract cover future businesses I open?
It can, provided the contract is drafted broadly enough. Your lawyer can include a “future corporate interests” clause that explicitly excludes any new clinics, holding companies, or leasing corporations you incorporate after the date of marriage.
What if my spouse works for my equipment leasing company?
If your spouse acts as a bookkeeper or director for the company, it complicates matters. They may claim a “constructive trust,” arguing their labour increased the company’s value. Your marriage contract must explicitly state that their employment does not grant them any ownership rights or equity in the business.
Can a judge throw out a corporate marriage contract?
Yes. Under section 56(4) of the Family Law Act, a judge can set aside the contract if you failed to disclose significant corporate assets, if your spouse did not get Independent Legal Advice, or if they were pressured into signing it days before the wedding.
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