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№ 22 Wills & Estates

Can You Deduct a Mortgage When Calculating Probate Fees in Ontario?

Learn whether Ontario estate administration tax is based on a home's full value or its equity, which debts can be deducted, and which cannot.

Wills & Estates4 min readTSLBy the Treadstone Law Team · OntarioUpdated October 28, 2026
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Key takeaways
  • A mortgage or lien registered against Ontario real estate can be deducted, so the tax on a mortgaged home is based on equity, not full value.
  • Funeral costs, legal fees, credit card debt and unregistered loans or lines of credit cannot be deducted from the estate value.
  • The tax is $15 for every $1,000 of estate value, with the first $50,000 exempt, and the value is rounded up to the nearest thousand.
  • Even if the calculated tax is nil, the Estate Information Return must still be filed within 180 days of the certificate.

If you are the executor of someone who owned a mortgaged home in Ontario, one of the first questions is how much the court will charge to issue the certificate. The charge is called estate administration tax, and many people assume it is based on what the house could sell for.

The answer is more favourable than that, but it has limits. This article explains how a mortgage affects the calculation, which other debts do not, and how the tax and the required filings work.

The short answer: registered encumbrances come off the real estate

Ontario counts real estate in the estate value less encumbrances such as mortgages or liens. Put simply, the tax on a mortgaged Ontario home is based on equity, meaning the value of the home less the registered encumbrance, rather than its full value.

The word registered matters. The deduction is for encumbrances on the real property, such as a mortgage or lien. Unregistered loans and lines of credit are on the list of items that cannot be deducted. If you are unsure whether a particular loan is registered against the title, a lawyer can confirm that from the property records.

What can and cannot be deducted

ItemTreatment for estate administration tax
Mortgage or lien on Ontario real estateDeducted from the value of the real estate
Funeral expensesCannot be deducted
Lawyer's feesCannot be deducted
Credit card debt, vehicle debt, loans and interestCannot be deducted
Real estate commissionsCannot be deducted
Unregistered loans or lines of creditCannot be deducted

Many executors expect debts in general to reduce the tax. Apart from encumbrances on real property, the common debts and costs of winding up an estate do not.

What else counts toward the estate value

The mortgage is only one piece. Assets counted include Ontario real estate (less encumbrances), bank accounts including foreign banks, investments, RRSPs, RRIFs and TFSAs without a beneficiary designation, vehicles and vessels wherever located, property held in another person's name, and insurance proceeds payable to the estate.

The value is measured in Canadian dollars at the date of death.

How the tax is worked out

For applications made on or after January 1, 2020, the tax is $15 for every $1,000 (or part of $1,000) of estate value, with the first $50,000 exempt. The value is rounded up to the nearest thousand before the rate is applied, and the government's own example is a $240,000 estate owing $2,850. The older two-band structure with a $5 rate on the first $50,000 applied only to earlier applications and is now historic.

Estate value (after deductions)Tax
$500,000$6,750
$1,000,000$14,250
$2,000,000$29,250

These figures are the estate value after allowable deductions, so the mortgage deduction changes the starting number. An estate valued at $50,000 or less pays no tax, but the representative must still apply for the certificate and file the return.

Timing, estimates and what to do next

The tax is paid as a deposit when you apply and becomes the tax once the certificate is issued. Form 74A asks for the total value of real property, personal property and the total estate value, and the guidance does not require a formal appraisal. In some cases tax can be paid on a sworn estimate, with a sworn statement of the actual value due within six months and any balance paid. If you cannot pay when applying, you can ask a judge for an order allowing later payment once assets are accessible.

Frequently asked questions

Is probate tax based on the full value of the house or only the equity?

For an Ontario home with a registered mortgage or lien, the tax is based on equity, meaning the value less the registered encumbrance. Other debts such as credit cards and unregistered loans do not reduce it.

Can I deduct funeral costs and lawyer's fees?

No. Funeral expenses and lawyer's fees are among the items that cannot be deducted from the estate value. You may still be able to treat them as estate expenses in other ways, which a lawyer or accountant can explain.

Do I need an appraisal to state the home's value?

Ontario's guidance does not require a formal appraisal. It describes estate value as at the date of death and allows a sworn estimate to be used with a later sworn statement. Because you swear to the value, many executors still get advice on how to support it.

What if I overpay or understate the tax?

The Ministry of Finance can reassess within four years after the tax was due, and at any time where a filing was missed or there was misrepresentation or fraud. Overpaid tax is recovered by request to the Ministry, subject to time limits.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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