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Correcting an Estate Administration Tax Error in Ontario

Learn how to correct under- or overpaid Estate Administration Tax in Ontario, when to amend the Estate Information Return, and how to request a refund.

Wills & Estates4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 6, 2026
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Key takeaways
  • The tax is $15 per $1,000 of estate value above $50,000 for applications on or after January 1, 2020, with no tax at $50,000 or less.
  • An Estate Information Return is due within 180 calendar days after the certificate is issued, and an amended return within 60 days of learning it is incomplete or inaccurate.
  • Where you request a refund depends on whether the certificate has been issued.

Estate trustees sometimes discover after paying probate tax that the estate was valued too high or too low. A debt was wrongly deducted, a property was missed, or an estimate turned out to be off.

This article explains how the tax is worked out, how to correct an underpayment, and how to ask for a refund of an overpayment. The right step depends on timing, so a lawyer or accountant can confirm what applies to your estate.

How the tax 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 value is rounded up to the nearest thousand. Applications made before January 1, 2020 followed a different exemption and different rates.

The estate pays the tax, not the estate representative personally. It is paid as a deposit when the application is filed and becomes payable when the certificate is issued.

Because the tax depends on value, a small change in how one asset is counted can change the amount owed. That is why it helps to keep clear records of how each figure was reached, so that you can explain it later if a correction is needed.

Where errors usually come from

The representative should be able to support each value with documents such as statements or an appraiser's opinion.

Correcting an underpayment

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. Do not wait if you already know the figure was low.

The Estate Information Return must be filed with the Ministry of Finance within 180 calendar days after the certificate is issued, even if no tax is payable. If you become aware that the information is incomplete or inaccurate, an amended return must be filed within 60 days.

Failing to file required information, or making false or misleading statements, is an offence, with a fine of at least $1,000 (up to twice the tax if the tax exceeds $1,000), imprisonment of up to two years, or both. It is not an offence if the person did not know, and could not reasonably have known, that a statement was false.

Asking for a refund of an overpayment

The route depends on timing.

StageWhere the request goesKey points
Certificate not yet issuedThe Superior Court of Justice office where the application was filedThe deposit is refunded if no certificate issues, and any excess is refunded if the estimate was too high
Certificate already issuedThe Ministry of Finance, by filing or amending the Estate Information ReturnThe information must have been provided within four years after the certificate was issued

For a request to the Ministry, 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 request goes to the Ministry of Finance, not the courthouse.

Because the two routes are different, confirm first whether the certificate has been issued. Sending a request to the wrong office can cost you time, and the deadlines above still apply while you wait.

What to do next

Once you have the documents together, compare the original value with the corrected one and note the reason for each difference. A short written summary makes it easier to complete an amended return and to answer questions if they come up. How this applies depends on your situation, so it is worth confirming with a lawyer or accountant.

Frequently asked questions

Can I deduct credit card debt to lower the tax?

No. Unsecured debts such as credit card balances, loans, interest and lines of credit cannot be deducted to reduce the estate's value for this tax. A mortgage or lien on Ontario real estate is treated differently.

How long do I have to file the Estate Information Return?

It must be filed within 180 calendar days after the certificate is issued, even if no tax is payable.

Who do I ask for a refund?

If the certificate has not been issued, ask 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.

Do I pay the tax out of my own pocket?

No. The estate pays the tax, not the estate representative personally.

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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