Current to July 17, 2026
In Ontario, signing a personal guarantee makes you personally responsible for specific business debts if the company cannot pay.
- A guarantee can be limited, unlimited, or continuing. Each type creates a different level of risk for you.
- If more than one person signs, joint and several liability can make any one guarantor responsible for the full amount.
- Whether and when the lender can come after you depends on the guarantee's demand, notice, and waiver terms.
- Wherever you have room to negotiate, ask for caps, notice requirements, a shrinking cap over time, and clear release conditions before you sign.
- A personal guarantee makes you personally responsible for specific business debts.
- In Ontario, a guarantee generally must be in writing and signed to be enforceable under s. 4 of the Statute of Frauds.
- The type of guarantee matters. It may be limited, unlimited, or continuing, and it may cover future debts too.
- Joint and several liability can let a lender chase one co-guarantor for the entire guaranteed amount.
- Demand, notice, diligence, and waiver terms decide when and how the lender can come after you.
- Amendments, renewals, extensions, and new advances can stay covered without asking you again, if the guarantee says so.
- Try to negotiate a clear total cap, and confirm whether interest, costs, and enforcement expenses count toward it.
- Ask for automatic releases tied to specific events, such as repayment, refinancing, or an owner leaving the business.
Almost every small business owner in Ontario is asked to personally guarantee something at some point. It might be a bank loan, an equipment lease, a commercial lease, or financing from a supplier. Signing is often treated like a formality, just one more signature in a stack of paperwork. It is not. A personal guarantee creates a separate legal promise to pay the company’s debt if the company cannot. In Ontario, this kind of promise generally must be in writing and signed to be enforceable under s. 4 of the Statute of Frauds.
Personal guarantees are significant documents for a business owner. A guarantee removes the protection a corporation is supposed to provide. Even so, guarantees are often one of the least negotiated documents in a financing deal. A corporation is designed to keep your personal assets separate from business debts, so it is easy to underestimate what a guarantee undoes. Reading the guarantee’s scope, its demand terms, and its release conditions before you sign is the best way to know exactly what you are putting on the line.
What a Personal Guarantee Actually Does
When you sign a personal guarantee, you promise to pay the obligations described in the document if the company cannot. A corporation is meant to keep your personal assets separate from the business’s debts. A guarantee creates a deliberate exception to that separation, but only for the debts it actually covers. Many lender forms also include an indemnity, an exception clause, or wording that makes you liable “as principal debtor.” These clauses are meant to create more direct liability. They can also block defences that might otherwise let a guarantor off the hook, including arguments based on how the lender handled its security. In one leading case, a guarantor argued that the bank’s failure to protect its security should discharge him from the guarantee. The Supreme Court of Canada enforced the guarantee’s broad principal-debtor and exception-clause wording anyway (Bauer v. Bank of Montreal, 1980). The lesson is simple: broad wording in a guarantee usually does exactly what it says. Read it carefully before you sign.
Limited vs. Unlimited Guarantees
Not all guarantees create the same risk. An unlimited guarantee, sometimes called an “all obligations” or continuing guarantee, can cover current and future advances, renewals, interest, and enforcement costs until it is properly ended. A limited guarantee usually caps the main debt, but interest and legal costs can sometimes sit outside that cap unless the wording says otherwise. If you have any room to negotiate, ask for a clear total cap. Also push for a cap that shrinks as the loan is paid down, and an automatic release tied to a specific event. If you are allowed to end the guarantee, that usually only stops liability for new advances made after that point. It typically does not erase debts you already guaranteed (Manulife Bank of Canada v. Conlin, 1996).
Before comparing the numbers, it helps to know what each type of guarantee actually means:
- Limited guarantee: you are only responsible up to a set dollar amount, or for specific debts named in the document. Watch for interest, legal fees, and enforcement costs. These can sometimes fall outside the cap unless the guarantee says otherwise.
- Unlimited guarantee: you are responsible for the whole guaranteed debt, with no ceiling. This can grow over time as interest, fees, and new advances add up.
- Continuing guarantee: this covers an ongoing series of debts instead of just one loan. It often includes future advances and renewals, and it stays active until it is properly ended under its own terms.
- Joint and several guarantee: when two or more people sign together, the lender can chase any one guarantor for the whole amount. It does not matter what share of the company that person owns. The guarantor who pays can then try to collect a fair share from the others.
| Type | Scope | Future Obligations | Duration / Termination | Typical Risk | Negotiation Objective |
|---|---|---|---|---|---|
| Limited | Capped amount or defined obligations | Only if expressly included | Ends or reduces as stated; termination is often prospective | Interest, costs, or a non-declining cap may exceed expectations | Aggregate declining cap covering all costs; automatic release |
| Unlimited | All covered debt, interest, and enforcement costs | Often included under broad wording | Continues until repayment or release, subject to its terms | Full personal exposure as debt and costs grow | Convert to a limited guarantee; add carve-outs and release events |
| Continuing | A series of present and future obligations | Typically includes advances, renewals, and re-advances | Continues until effective notice; existing obligations usually survive | Exposure may persist or grow despite later changes | Cut-off rights, consent for increases, and a defined automatic release |
In one financing deal, we helped a client push back on the lender’s request for an unlimited personal guarantee. We negotiated a cap that shrank automatically as the loan balance went down. The business later hit a rough patch, and the loan went into default. Our client’s personal exposure turned out to be a small fraction of what it could have been, simply because the cap had already dropped by that point. Borrowers should keep one thing in mind: renegotiating a guarantee gets harder once a lender knows you need the money. It is best to push for better terms early, before the deal is under time pressure.
Joint Guarantees Between Co-Owners
When a business has more than one owner, lenders often ask each owner to sign a joint and several guarantee. This lets the lender pursue any one owner for the entire guaranteed amount, no matter what share of the company that owner holds. The owner who pays can then bring a contribution claim against the other guarantors to recover a fair share. A guarantor who pays the full debt may also have a statutory right to receive an assignment of the lender’s security. This lets the paying guarantor step into the lender’s shoes to help recover what was paid (Mercantile Law Amendment Act, R.S.O. 1990, c. M.10, s. 2). These contribution and assignment rights sound reassuring, but they do not stop the lender from choosing its target first. They may also be worth little in practice if the other guarantor has no money, or if the lender’s security is not worth much. Before signing, owners should think about a few protections. These include separate caps, liability tied to ownership share, a release when an owner leaves the business, and a written agreement between the co-guarantors themselves.
We were retained by a minority shareholder who owned fifteen percent of the Borrower company. He was about to sign the lender’s standard joint and several guarantee alongside his majority co-owner. As written, that guarantee would have let the lender chase either owner for the full loan balance. That could happen if the loan went into default, no matter how much each person owned. We stepped in before he signed and negotiated a different structure. Instead of joint and several liability, each owner’s guarantee was tied to his own ownership share. Later, the relationship between the co-owners turned sour. Even so, our client’s maximum exposure stayed capped at fifteen percent of the balance. It was never the full amount the lender had first wanted from each of them.
When Guarantees Get Called
A lender usually does not have to exhaust every option against the company just because a guarantee is in place. The lender might have to ask the company to pay first, give notice of default, sell off collateral, or wait a set period. Or it might be allowed to make a separate demand on you right away. Which one applies depends on the wording of the guarantee and the loan or lease behind it. Many modern guarantee forms waive notice and waive the requirement that the lender act carefully before moving to collect. They let the lender come after the guarantor right away, and they say the guarantor is liable as a principal debtor. Even so, a demand might still be a required step before you are actually liable to pay. The timing of that demand can also affect when the legal deadline for a lawsuit starts running. Read the trigger, notice, demand, and waiver clauses together. Do not assume the lender has to go after the company first.
A lender’s right to call on a guarantee usually comes down to one of a few things:
- The company defaults on the underlying loan, lease, or financing agreement.
- The lender realizes on available collateral and a shortfall remains outstanding.
- A stated waiting period or condition precedent to demand has been satisfied.
- The guarantee waives notice and diligence, letting the lender pursue the guarantor immediately.
A personal guarantee is not undone by leaving the business. It ends only when its own terms say it ends.
Negotiating the Terms Before You Sign
Lenders often present guarantees as take it or leave it, and a lot of the wording may be standard. Even so, many parts of a guarantee may be open to negotiation. This includes the cap, the list of covered debts, how long it lasts, the demand process, the release conditions, and any carve-outs, especially if you have a strong banking relationship or solid collateral to offer. Pay close attention to advance-consent clauses. These let the lender and the company extend deadlines, increase credit limits, renew debt, release security, or otherwise change the deal without asking you again. At common law, if the lender and the company materially change the guaranteed debt without your consent, you may be released from the guarantee. This is especially true if the change increases your risk. A well-drafted continuing-guarantee or advance-consent clause can act as your consent given in advance, but courts read this kind of clause narrowly. In one case, a lender renewed a mortgage at a new interest rate without telling the guarantor, relying on a standard advance-consent clause. The Supreme Court of Canada found that the clause’s wording did not clearly cover a “renewal.” Because the wording was unclear, the court applied a rule called contra proferentem. This rule interprets unclear wording against the party who drafted it, in this case the lender. As a result, the court released the guarantor from the guarantee (Manulife Bank of Canada v. Conlin, 1996). A similar issue came up over a variation of the underlying arrangements in Bank of Montreal v. Wilder, 1986. The lesson is clear: an advance-consent clause must be explicit and unambiguous, and it must specifically cover the exact change being made.
Also check whether the guarantee survives certain events. These include repayment and new advances, the borrower’s insolvency, a change in ownership, or a payment that is later reversed as a preference, transfer at undervalue, or other insolvency clawback. None of this should be assumed. It depends heavily on the guarantee’s wording about survival, insolvency, ownership changes, reinstatement, continuing security, and waivers. Courts read these agreements as a whole and give real weight to the words actually used. That matters most for broad waivers, exclusions, and survival language: Sattva Capital Corp. v. Creston Moly Corp., 2014 SCC 53, [2014] 2 S.C.R. 633; Ledcor Construction Ltd. v. Northbridge Indemnity Insurance Co., 2016 SCC 37, [2016] 2 S.C.R. 23. It is worth getting legal advice before you sign, not after the company defaults, when your options are far more limited.
Five Common Mistakes
- “Treating a personal guarantee as a formality can put personal assets at risk.”
- “A continuing guarantee may cover future advances, renewals and re-advances.”
- “Do not assume the lender must pursue the company before pursuing you.”
- “Joint-and-several liability can leave one guarantor exposed for the full amount.”
- “Negotiate caps, declining liability and clear release events before signing.”
Frequently Asked Questions
Generally, yes. It needs to be in writing, signed, and it must meet the guarantee's own requirements.
Yes, if the guarantee allows direct recourse or waives the need to go after the company first.
Often, yes. You can try to negotiate a total cap, a shrinking cap, a narrower list of covered debts, and clear release conditions.
No. You are usually still on the hook until the lender gives you a written release, or the guarantee's own end conditions are met.
Joint and several wording can let the lender demand the full amount from any one guarantor, not just their fair share.
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This article gives general information about Ontario and Canadian law, current to July 17, 2026. It is not legal, tax, accounting, or investment advice, and it doesn't replace advice about your specific situation. Reading it doesn't create a lawyer-client relationship. Laws and practices change. Get advice from a qualified Ontario lawyer before you sign, or ask someone else to sign, a personal guarantee.
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