Property Tax Adjustments on Closing: A Buyer and Seller Guide for Ontario

Of all the line items on an Ontario statement of adjustments, property tax adjustments generate the most questions. Buyers want to know why they are paying for taxes before they ever live in the house. Sellers wonder why they are receiving a credit for taxes they expected to pay themselves. The confusion is understandable — Ontario's municipal tax billing system is complicated, varies by municipality, and almost never aligns perfectly with a closing date.

This guide explains how property tax adjustments on closing work across Ontario, what information your lawyer needs to get the calculation right, and how to spot errors before closing day.

Why Property Taxes Create a Closing Adjustment

Property taxes in Ontario are levied by municipalities (and flow to school boards through the province). Unlike a utility bill that covers only what you used, property taxes are assessed annually and billed in installments — sometimes before the period they cover, sometimes after, and sometimes in a mix of both.

Because the tax billing cycle never lines up perfectly with a real estate closing date, the seller and buyer must settle who owes what for the fraction of the year they each occupy the property. This reconciliation appears on the statement of adjustments as either:

• A credit to the seller (prepaid scenario: seller paid taxes for days the buyer will own the property), or
• A credit to the buyer (arrears scenario: seller owes taxes for days they owned the property but has not yet paid)

Ontario Municipal Tax Billing: How It Works

There is no single billing schedule across Ontario. Each municipality sets its own:

• Number of installments per year (common structures: two, three, or six installments)
• Due dates for each installment
• Whether installments are estimated (based on last year's tax) or final (based on the current year's assessment)
• How interim bills and final bills are structured

Common structure example: Many Ontario municipalities issue:

1. An interim tax bill early in the year (January–March), based on 50% of the prior year's taxes, covering roughly the first half of the year
2. A final tax bill mid-year (May–July), reflecting the current year's actual assessment, covering the second half

If closing falls in February after the seller has paid the interim bill, the seller has prepaid taxes for months they will not own the property — a credit flows to the seller.

If closing falls in May before the final bill is even issued, the seller has used months of municipal services without paying — a credit flows to the buyer.

As of writing, billing schedules vary significantly by municipality. Your lawyer will obtain a tax certificate from the municipality to confirm the exact billing cycle, amounts paid, and amounts outstanding before completing the adjustment.

The Per-Diem Calculation

The property tax adjustment is calculated on a per-diem (per-day) basis:

Annual tax amount ÷ 365 × number of days = adjustment amount

The "annual tax amount" used is typically the current year's total tax levy as shown on the tax certificate. If the current year's final assessment is not yet available (common when closing in the first few months of the year), the lawyer may use the prior year's amount as an estimate and agree to a true-up once the final bill is issued.

Example calculation:

• Annual property taxes: $6,000
• Per diem: $6,000 ÷ 365 = $16.44 per day
• Closing date: June 15
• Seller has paid the interim bill covering January 1 – June 30 (181 days)
• Seller has prepaid for June 15–30 = 15 days for the buyer's benefit
• Seller credit: 15 × $16.44 = $246.58

Interim vs. Final Tax Bills and the "Estimated" Adjustment

When closing occurs in the gap between the interim bill and the final bill — or before the final bill has even been issued — your lawyer may have to use an estimated adjustment.

This happens because:

• The final tax levy depends on the current year's Municipal Property Assessment Corporation (MPAC) assessment, which may not yet be reflected in an issued bill
• Municipalities sometimes finalize rates late in the year
• New construction may have an interim assessed value that changes significantly

In these cases, the statement of adjustments includes an estimated figure with a note that the parties will "readjust" once the final bill is available. Both lawyers keep a note, and once the final bill arrives, a small additional payment flows from one party to the other (usually handled informally between the law firms).

Tax Certificates: What Your Lawyer Orders

A tax certificate (also called a "realty tax search" or "tax status certificate") is a document obtained from the municipality confirming:

• Current year tax amounts (interim and final, where issued)
• Any outstanding arrears or penalties
• The property's tax account status

Your lawyer orders this as part of the title search process. Without it, no accurate property tax adjustment can be prepared. If there are arrears on the account, those are also addressed on closing — the seller must clear them from the sale proceeds.

Common Errors in Property Tax Adjustments

Using the wrong year's taxes: If the lawyer uses the prior year's tax amount when the current year's final bill has already been issued, the adjustment will be wrong. Always confirm which tax year is being used and why.

Missing municipal tax rate increases: Assessment and rate changes can mean the current year's taxes are materially different from last year's. A $300 per year increase becomes a noticeable closing error.

Ignoring a local improvement charge: Some properties carry a special local improvement charge (for road paving, sewer installation, etc.) that is added to the tax bill. This may appear as a separate line on the tax certificate and should be adjusted separately.

Not reconciling the adjustment after the final bill arrives: Both lawyers should have a procedure for the post-closing true-up if an estimated adjustment was used. Make sure your lawyer confirms this is being tracked.

Frequently asked questions