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Overpaid Estate Administration Tax: How to Get a Refund in Ontario

If an estate's value was overstated, find out whether Ontario Estate Administration Tax can be refunded, where to ask, and the time limits that apply.

Wills & Estates4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 1, 2026
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Key takeaways
  • Before a certificate is issued, a deposit refund is requested from the Superior Court of Justice office where you filed.
  • After issuance, the request goes to the Ministry of Finance by filing or amending the Estate Information Return.
  • Strict time limits apply, so act as soon as you spot the error.

You filed for a certificate and later realized you overstated the estate's value, perhaps by counting a debt that could not be deducted or an asset at too high a figure. You are wondering whether the extra tax can come back.

Where you ask depends on one thing: whether the certificate has been issued yet. This article walks through both routes and the deadlines.

Why overpayment happens

The tax is paid as a deposit when the application is filed and becomes payable when the certificate is issued. Deposits are sometimes based on estimated values. If the estimate was too high, or an asset was valued above fair market value at the date of death, the estate may have paid too much.

Mistakes also happen when people subtract items the tax rules do not allow, or include property that is left out of the calculation. The next section sets out what generally counts.

How the estate's value is worked out

For applications made on or after January 1, 2020, no tax is payable if the estate is worth $50,000 or less. Above that, the tax is $15 for each $1,000 or part of $1,000 by which the value exceeds $50,000, and the estate value is rounded up to the nearest thousand. For applications made before January 1, 2020, the exemption was $1,000 or less and different rates applied.

Before the certificate is issued

If the certificate has not yet been issued, a refund of the deposit is requested from the Superior Court of Justice office where the application was filed, not from the Ministry. Under the Estate Administration Tax Act, s. 3(6)-(7), the deposit is refunded if no certificate issues, and any excess is refunded if the estimate was too high.

If the deposit was based on an estimated value, the applicant must undertake to file a sworn statement of the actual value and pay any additional tax within six months.

After the certificate is issued

Once the certificate has issued, the request goes to the Ministry of Finance, not the courthouse. It is made by filing or amending the Estate Information Return.

Two time limits apply. The information must have been provided within four years after the certificate was issued. The written request must be received within 12 years after the certificate was issued, or within 2 years after a notice of assessment or reassessment.

The return itself is due within 180 calendar days after the certificate is issued, even if no tax is payable. If you learn that information is incomplete or inaccurate, an amended return must be filed within 60 days of becoming aware.

Accuracy matters. Failing to file the required information, or making false or misleading statements, is an offence, although it is not an offence if the person did not know, and could not reasonably have known, that a statement was false.

Comparing the two routes

SituationWhere to ask
Certificate not yet issuedSuperior Court of Justice office where you filed
Certificate already issuedMinistry of Finance, through the Estate Information Return

What to do next

How a refund applies to your estate depends on the facts, so it is worth confirming the details with a lawyer or accountant before you file anything.

Frequently asked questions

Can I get a refund if I used an estimated value?

Possibly. If the certificate has not yet been issued and the estimate was too high, any excess is refunded, and you ask the Superior Court of Justice office where you filed. After the certificate is issued, the request goes to the Ministry of Finance through the Estate Information Return. If the deposit was based on an estimated value, the applicant must also undertake to file a sworn statement of the actual value and pay any additional tax within six months if the actual value is higher.

Do I ask the courthouse or the Ministry of Finance?

It depends on timing. Before the certificate is issued, ask the court office where you filed. After issuance, ask the Ministry of Finance through the Estate Information Return.

How long do I have to ask for a refund?

After issuance, the written request must be received within 12 years of the certificate, or within 2 years after a notice of assessment or reassessment. The information must also have been provided within four years after the certificate was issued.

Who gets the refund?

The estate pays the tax, not the representative personally. Before the certificate is issued, a deposit refund is requested from the court office where you filed, and after issuance the request goes to the Ministry of Finance. Beyond that, how a refund is handled depends on your estate's circumstances, so it is worth confirming with a lawyer or accountant.

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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