Outstanding Property Tax Arrears at Closing in Ontario: Who Pays and How It's Resolved

Finding out a property has unpaid municipal taxes attached to it, partway through a purchase, sounds alarming. In practice, it's a routine issue that Ontario real estate lawyers handle regularly — but it does need to be caught and addressed properly, because arrears can affect whether title transfers cleanly.

Here's how tax arrears typically show up in a transaction, who actually ends up paying, and the process lawyers use to resolve them before closing.

How Tax Arrears Show Up in a Real Estate Deal

Arrears are usually identified through a tax certificate — a document the municipality issues confirming the property's current tax account status, including any unpaid balance from prior periods. Your lawyer orders this as a standard part of due diligence, typically well before closing, precisely so that any arrears surface with enough time to deal with them properly.

Why Arrears Are a Big Deal for Buyers

Liens, writs of execution, and other encumbrances registered against a seller can affect marketable title and must be addressed — paid out, discharged, or otherwise dealt with — before or at closing. Unpaid municipal property taxes function similarly: they represent a claim tied to the property itself, not just a personal debt of the seller. A buyer generally doesn't want to take title while that claim is still outstanding, which is exactly why this gets resolved as part of closing rather than left for later.

Who Actually Pays: The Short Answer

In the overwhelming majority of resale transactions, arrears get paid out of the seller's proceeds at closing — not out of the buyer's pocket, and not left as the buyer's problem to chase down afterward. The seller owned the property during the period the arrears accrued, so the cost comes out of what they'd otherwise receive from the sale.

This is different from the routine, non-arrears statement of adjustments, which fairly splits the current tax year between buyer and seller based on the closing date — that's a normal proration, not a debt one side "owes" the other.

How Arrears Get Resolved Before Closing

1. The tax certificate is ordered, confirming the account balance as of a specific date.
2. Any arrears are identified and quantified precisely, along with the current year's proration.
3. The figures are built into the statement of adjustments, so the closing numbers reflect the true amount owing.
4. Funds are held back or paid out directly from the seller's sale proceeds at closing to clear the arrears, typically coordinated between the buyer's and seller's lawyers.
5. Clearance is confirmed before the balance of funds is released to the seller, so the buyer isn't left holding an unresolved tax debt on the property they just purchased.

This process is a normal part of closing mechanics on any file where arrears turn up — it doesn't require the deal to fall apart or be renegotiated from scratch, though it does need to be worked into the numbers correctly.

If Arrears Aren't Caught Until Late in the Deal

Occasionally, arrears come to light close to closing — for instance, if a tax certificate response is delayed or an issue surfaces during a final search. When this happens, lawyers typically still resolve it the same way, by adjusting the closing funds, but it can mean a tighter timeline and more coordination between both sides' lawyers. This is another reason lawyers generally order tax certificates with meaningful lead time rather than at the last minute.

What This Means If You're the Seller

If you're selling, don't assume outstanding taxes will simply be forgotten or absorbed elsewhere — they'll be deducted from your proceeds at closing. If you're aware of any arrears, tell your lawyer early so it can be built into your expectations for what you'll actually receive, rather than coming as a surprise on closing day.

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