Suing a Friend or Family Member Over an Unpaid Personal Loan in Ontario Small Claims Court

Lending money to someone you care about rarely comes with a signed agreement, a repayment schedule, or interest calculations — it comes with a promise and a handshake, or these days, an e-transfer and a text. That informality is exactly what makes it harder when the money doesn’t come back. If a friend or family member won’t repay what you lent, you can still generally sue them for an unpaid loan in Ontario Small Claims Court — the process just leans more heavily on the evidence you can piece together after the fact.

This article covers what proof actually matters, whether you need anything in writing at all, and how the personal relationship changes your approach.

Why Personal Loans Are Hard to Prove

Commercial lenders paper every loan with signed terms. Friends and family usually don’t, which means the court has to reconstruct what was agreed from indirect evidence rather than reading it off a contract. The core questions a court will want answered are:

• Was this actually a loan (to be repaid) or a gift (not expected back)?
• What amount was involved, and was there any agreed repayment date or schedule?
• Has anything already been repaid?

Ambiguity on the first question — loan versus gift — is the single biggest obstacle in these cases, so your evidence should focus there first.

Evidence That Can Make or Break Your Case

• [ ] E-transfer records, bank statements, or cheque images showing the money leaving your account
• [ ] Texts, emails, or messages where the loan (and ideally repayment terms) are discussed
• [ ] Any message referring to the money as a "loan," "owed," or "to pay back" — even casual language helps
• [ ] A record of any partial repayments made
• [ ] Witness accounts from anyone present when the loan was discussed or agreed
• [ ] Your written demand for repayment, and their response (or silence)

If you have nothing in writing at all, don’t assume that ends the case — but do assume it will be a harder case, and gather everything you can before filing.

Do You Need a Written Agreement?

Ontario law doesn’t generally require an ordinary personal loan between individuals to be in writing to be enforceable — informal loans can still be sued on. A different rule applies to certain other kinds of arrangements, like a guarantee (someone promising to pay a debt if a third party doesn’t), which Ontario’s Statute of Frauds does require to be evidenced in writing. If your situation actually involves someone guaranteeing another person’s debt rather than borrowing money directly, that distinction matters and is worth getting right before you file.

How Limitation Periods Work for a Personal Loan

Ontario’s general limitation period is two years, but the clock for a loan doesn’t necessarily start on the day the money was handed over — it typically starts when the claim is "discovered," which for a loan is usually the date repayment was due, or the date you first learned (or should have learned) that the person wasn’t going to pay you back (current as of mid-2026; verify this hasn’t changed). If there was never an agreed repayment date, a formal demand for repayment can be what starts that clock. Don’t wait years on a vague "they’ll pay me back eventually" understanding without documenting a clear ask.

Weighing the Relationship Cost

Unlike a dispute with a stranger or a business, suing a friend or family member carries a cost that doesn’t show up in the legal analysis: the relationship itself. Before filing, it’s worth being honest with yourself about whether:

• You’ve genuinely exhausted informal efforts to resolve this directly
• The amount at stake is worth the relationship strain a lawsuit will likely cause
• A structured, written repayment plan proposed now might resolve things without court

None of this changes your legal right to sue — it’s simply a factor most people weigh differently with a family member than with a landlord or business.

Filing in Small Claims Court

If informal efforts and a written demand letter don’t work, the process follows the standard path: file a Plaintiff’s Claim, serve the person properly, and see whether they file a Defence. Personal loan disputes typically fall well within Small Claims Court’s monetary jurisdiction, currently $50,000 exclusive of costs and interest (current as of mid-2026 — confirm before filing). If they defend the claim, a settlement conference is mandatory before it can proceed to trial.

Frequently asked questions