- Ontario's Partnerships Act makes all partners in a general partnership jointly and severally liable for the debts and obligations of the firm incurred while they are a partner.
- Every time a partner enters into a contract in the ordinary course of the partnership's business, that contract binds all partners — not just the one who signed.
- The exposure goes beyond contract debts.
Entering a partnership feels like teaming up — sharing the work, the risk, and the reward. But in Ontario, the legal reality of that shared risk goes further than most partners anticipate. As a general partner, you are not just responsible for your own actions. You can be held personally liable for the debts, contracts, and wrongful acts of your partners, even ones you knew nothing about. Your home, savings, and personal assets can be at stake.
Understanding partner liability for business debts in Ontario is essential before you agree to partner with anyone. This article explains how liability works, what events trigger it, how far it extends, and what limited options exist to reduce it.
The Foundational Rule: Unlimited Joint and Several Liability
Ontario's Partnerships Act makes all partners in a general partnership jointly and severally liable for the debts and obligations of the firm incurred while they are a partner. "Joint and several" is a legal term that means:
- Jointly: creditors can sue the partnership and all partners together.
- Severally: creditors can also sue any one partner alone for the full amount of the debt.
If your partnership owes $200,000 to a creditor and your business partner has no assets, the creditor can pursue you personally for the entire $200,000 — and leave it to you to recover your partner's share from them separately.
This is not theoretical. It is one of the most significant legal risks in business life, and it is why so many business owners ultimately choose incorporation over a general partnership.
Liability for Contracts and Trade Debts
Every time a partner enters into a contract in the ordinary course of the partnership's business, that contract binds all partners — not just the one who signed. The counterparty does not need every partner's signature; one partner's authority to bind the firm is sufficient if they are acting within the usual scope of the business.
Examples of trade debts that can bind all partners:
- Office leases signed by one partner.
- Equipment financing arranged by one partner.
- Supplier invoices for goods ordered by one partner.
- A bank line of credit drawn on by one partner within the business's usual operations.
If the partnership cannot pay, each general partner is personally exposed to the full amount.
Liability for Wrongful Acts and Negligence
The exposure goes beyond contract debts. Under the Partnerships Act, all partners are jointly and severally liable if any partner, acting in the ordinary course of the firm's business or with the authority of their co-partners, causes loss or injury to a third party by a wrongful act or omission.
Example: Your business partner gives bad advice to a client, resulting in a significant financial loss. The client sues. Even if you were never involved in that client relationship, you may be personally liable for the damages — because your partner was acting within the ordinary scope of the partnership's business.
This cross-liability for negligence is one of the reasons the limited liability partnership (LLP) was created for professional firms. An LLP modifies this rule to protect non-involved partners from liability for their colleagues' professional errors (though you remain liable for your own).
Liability After Leaving the Partnership
Departing the partnership does not erase historic liability. A former partner remains liable for obligations the partnership incurred while they were a partner. If a debt arose during your membership, you are still personally exposed to that debt after you leave — unless the creditor specifically releases you.
For debts arising after your departure, the picture is more complicated:
- If a creditor did not know you had left and continued to extend credit to the partnership in reliance on your involvement, you may still be liable.
- Proper notice of departure to the world — including a notice in the Ontario Gazette and direct notice to known creditors — helps protect a departing partner from post-departure liability.
Leaving a partnership without attending to these formalities is a mistake that can haunt you for years.
New Partners and Pre-Existing Debts
When you join an existing partnership, you do not automatically become liable for debts the partnership incurred before you became a member. You are liable only for obligations arising on or after your admission date.
However, you should independently verify the partnership's financial position before joining — there is nothing to stop existing creditors from treating the partnership entity itself as the debtor, and joining a firm with hidden liabilities is a business risk even if it is not always a direct personal legal risk.
What Can Reduce (But Not Eliminate) Liability in a General Partnership?
Written Liability Limitation Clauses
Partners can agree among themselves to limit how liability is shared internally — for example, making the partner who caused a loss bear a greater share of it. But these internal arrangements do not bind third-party creditors, who can still pursue any partner for the full amount.
Professional Liability Insurance
For many professionals, the practical answer to personal liability risk is robust professional liability insurance. Insurance does not change the legal rule, but it means there is money available to pay a claim before a creditor starts targeting your personal assets.
Incorporation Instead of Partnership
A corporation is a separate legal entity from its shareholders. In most cases, trade creditors of a corporation cannot touch the personal assets of the shareholders. This is a central reason to choose incorporation for any business with significant liability exposure.
Frequently asked questions
Can a creditor sue only one partner and ignore the others?
Yes. Under joint and several liability, a creditor can pursue any one partner for the full debt. That partner then has a right to seek contribution from their co-partners — but if the co-partners have no assets, the entire burden falls on whoever the creditor chose to sue.
Does a limited partner have the same personal liability?
No. In a properly registered limited partnership, limited partners' liability is capped at the amount they invested, provided they do not participate in management. Only general partners have unlimited liability. See our related article on general vs limited partnerships.
I just found out my partner signed a lease I knew nothing about. Am I liable?
Possibly — if the lease relates to the ordinary course of the partnership's business. A landlord dealing with a business partner acting in that capacity is generally entitled to assume they are binding the firm. Your recourse is against your partner internally, not against the landlord.
How do I protect myself when I leave a partnership?
Give written notice to all known creditors that you have left. Consider publishing a notice in the Ontario Gazette. Get a written release from key creditors where possible. Update any business name registration and public-facing materials. Document your departure date clearly in a written withdrawal agreement.
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