TREADSTONE LAW · ONTARIO · DIGITAL LEGAL SERVICES · EST. MMXXI ·TSL
Licensed by the Law Society of OntarioFlat fees published upfrontWe reply to messages within 1 business daySign in
Home/Articles/Wills & Estates
№ 22 Wills & Estates

Supplementary Estate Administration Tax When New Assets Appear

Found an account or property after the certificate was issued? Learn when more Ontario estate administration tax is owed, how to report it and how to pay.

Wills & Estates5 min readTSLBy the Treadstone Law Team · OntarioUpdated October 28, 2026
← All articles
Key takeaways
  • If property turns up after the certificate issues, a sworn statement of its value must be filed with the registrar within six months, and tax on it is payable when that statement is delivered.
  • The Estate Information Return usually needs to be amended within 60 days after the statement is delivered to the court.
  • Additional tax can be paid to the court with an affidavit, or to the Ministry of Finance, which issues a confirmation for the court.
  • Only some assets count toward estate value, so confirm whether the new item is included before assuming more tax is due.

You have finished the main work. The certificate of appointment of estate trustee was issued, the tax was paid and the return was filed. Then a forgotten bank account, an investment statement or a piece of property turns up. It is natural to worry that you did something wrong and that more tax is now owing.

Finding something late is common, and the law has a process for it. This article explains how the additional tax works, what has to be filed, how to pay, and why a prompt, accurate report matters. Your situation may have details that change the steps, so a lawyer or accountant can confirm them.

Does the new asset add to the estate value?

The first question is whether the asset belongs in the estate value at all. Ontario counts Ontario real estate (less encumbrances such as mortgages or liens), bank accounts including foreign banks, investments including TFSAs, RRSPs and RRIFs, vehicles and vessels wherever located, property held in another person's name, and business interests and insurance proceeds payable to the estate.

Other things are left out. These include assets the deceased owned earlier but not at death, jointly owned assets that pass automatically to the other owner, real estate outside Ontario, the CPP death benefit, and RPPs, RRSPs, RRIFs and TFSAs that have a named beneficiary. A registered plan counts only where there is no beneficiary designation, for example where it is payable to the estate.

Value is the fair market value at the date of death, supported by documents such as statements or appraisals.

What the law requires once you find it

If property is discovered after the certificate issues, a sworn statement of its value must be filed with the registrar within six months, and the tax on it is payable when that statement is delivered.

For estate certificate applications made on or after January 1, 2020, the tax is $15 for each $1,000 (or part of $1,000) of estate value above $50,000. Values are rounded up to the nearest $1,000 before the calculation. How the rate and the $50,000 exemption apply to a newly found asset, and how it combines with the original estate value, depends on your situation, so it is worth confirming with a lawyer or accountant.

SituationWhat to do
Property found after the certificate issuedFile a sworn statement of its value with the registrar within six months
Tax on the new propertyPayable when the statement is delivered
Estimate was used originallyAmend the return within 60 days after the actual value is shared with the court
New assets foundReport and amend the return within 60 days after the statement is delivered to the court

Paying the additional tax

There are two routes. You can pay the additional tax to the court with an affidavit setting out the revised value and an explanation, or you can pay the Ministry of Finance, which issues a confirmation that you then give to the court.

The estate pays the tax. The estate representative is liable only in a representative capacity, and Ontario states the tax is paid by the estate, not by the representative.

If the original deposit was based on an estimate, the applicant gave an undertaking to file a sworn statement of the actual value and pay any shortfall within six months. A late-discovered asset and an estimate that turned out too low can both lead to extra tax, so check which applies to you.

Amending the Estate Information Return

The original Estate Information Return was due within 180 calendar days after the certificate was issued. A change in value usually means an amended return as well. Ontario's guidance gives three triggers: an estimate was used, information was wrong or incomplete, or new assets were found.

Returns can be filed online (the fastest route), by mail, courier, in person or fax.

Why prompt reporting matters

The Minister of Revenue may assess or reassess the tax. Assessments are generally allowed within four years after the tax became payable, but there is no such limit where there was a failure to comply with the information requirement, misrepresentation or fraud. Estate representatives must also keep records that allow the tax to be accurately determined.

Failing to file, or giving false or misleading information, is an offence. The penalty is a fine of at least $1,000 (up to twice the tax if more), up to two years' imprisonment, or both, and a reasonable-diligence defence exists. An honest oversight that you report promptly is very different from concealment, which is why speed and accuracy matter.

If you disagree with an assessment, a Notice of Objection must be filed within 180 days of the Notice of Assessment.

What to do next

If the numbers are large, the asset type is unusual or the deadlines are close, speak with an estate lawyer or accountant before filing. The Ministry can be reached at 1-866-ONT-TAXS (668-8297), Monday to Friday, 8:30 am to 5:00 pm.

Frequently asked questions

Do I have to pay more tax if I find an account after the certificate is issued?

Possibly. If the account counts toward estate value, a sworn statement of its value must be filed with the registrar within six months and tax on it is payable when the statement is delivered. Whether it counts depends on things like beneficiary designations and joint ownership.

Is the extra tax calculated at the same rate?

How the rate applies to a newly found asset, and how its value combines with the original estate value, depends on your situation. It is worth confirming with a lawyer or accountant before you file.

Who pays the extra tax, me or the estate?

The estate pays. The estate representative is liable only in a representative capacity.

Can I get money back if I overpaid?

Overpaid tax is refundable if the return was filed or amended within four years of the certificate. The request goes to the Ministry of Finance and must be made within 12 years of the certificate or 2 years of a notice of assessment.

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.

This is a wills & estates question

Start a file online — flat, published fees, reviewed by a licensed lawyer before a dollar is owed.

ContactStart a File →