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Common Tax Mistakes Executors Make Administering an Ontario Estate

A rundown of the recurring tax errors — from missed elections to premature distributions — that create problems for Ontario estate trustees.

Tax5 min readTSLBy the Treadstone Law team · OntarioUpdated 2026-07
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Key takeaways
  • An executor who distributes estate assets to beneficiaries before obtaining a CRA Clearance Certificate risks becoming personally liable for any unpaid taxes of the deceased or the…
  • Ontario requires an Estate Information Return to be filed within 180 calendar days after the estate certificate (probate) is issued, reporting the value and details of the assets subject…
  • When an estate sells, or is deemed to dispose of, a property that qualifies for the principal residence exemption, executors sometimes assume that because no tax is owing, nothing needs…

Most people who agree to act as an executor have never done it before, and estate administration comes with real tax deadlines and personal exposure that aren't obvious from the outside. These executor tax mistakes show up again and again in Ontario estates — usually made with good intentions, and usually avoidable with the right information up front.

None of these mistakes make someone a bad executor. They're simply easy to miss without a checklist, which is exactly what this article is meant to provide.

Distributing Estate Assets Before Getting a Clearance Certificate

This is the mistake with the most serious personal consequences. An executor who distributes estate assets to beneficiaries before obtaining a CRA Clearance Certificate risks becoming personally liable for any unpaid taxes of the deceased or the estate — meaning the executor's own money, not just the estate's, can be on the hook if a shortfall is discovered later.

It's tempting to distribute early to satisfy anxious beneficiaries, especially in a straightforward-looking estate. Waiting for clearance protects the executor even when everything looks fine.

Missing the Estate Information Return Deadline

Ontario requires an Estate Information Return to be filed within 180 calendar days after the estate certificate (probate) is issued, reporting the value and details of the assets subject to the Estate Administration Tax. Executors sometimes treat this as an afterthought once probate comes through, when it's actually a hard deadline with its own filing obligation, separate from any income tax return.

Forgetting to Report a Tax-Free Principal Residence Sale

When an estate sells, or is deemed to dispose of, a property that qualifies for the principal residence exemption, executors sometimes assume that because no tax is owing, nothing needs to be filed. In fact, the sale generally still needs to be reported on Schedule 3 of the relevant T1 return, even when the gain is fully sheltered. Missing this reporting requirement can put the exemption itself at risk.

Overlooking the Graduated Rate Estate Window

An estate can generally access graduated tax rates, similar to an individual's, only during a limited initial period after death, under the "graduated rate estate" regime. Outside that window, the estate — like most other trusts — is generally taxed at the top marginal rate with no basic personal exemption. Executors who don't track this window can end up filing the estate's returns in a way that costs the estate more tax than necessary, or that misses elections only available while the estate still qualifies.

Assuming Every Asset Counts Toward the Estate Administration Tax

Not every asset the deceased owned needs to be included in the Estate Administration Tax calculation. Property held jointly with right of survivorship, and assets with a named beneficiary — RRSPs, TFSAs, life insurance, many pension plans — typically pass outside the estate and outside the probate/EAT calculation entirely. Executors sometimes either over-report, including assets that shouldn't count and overpaying the tax, or under-report, missing an asset that does count and creating a discrepancy CRA or the court may later question.

Missing Elections and Deadlines on the Deceased's Final Return

The deceased's final (terminal) tax return often carries elections and reporting obligations beyond a routine annual return — including, potentially, deemed disposition reporting on capital property, RRSP/RRIF inclusion, and coordination with any graduated rate estate elections. Treating the final return as "just another T1" rather than flagging it for an accountant experienced in estate returns is a common source of missed opportunities and errors.

Quick Reference Checklist

Frequently asked questions

Can an executor be personally sued or fined for these mistakes?

Exposure varies by mistake. Distributing before a clearance certificate creates the clearest path to personal liability for unpaid taxes; other mistakes, like a missed filing deadline, more commonly lead to penalties or interest charged to the estate rather than the executor personally — but a serious enough breach of an executor's duties can expose them to a claim from beneficiaries as well.

How long does it typically take to get a CRA Clearance Certificate?

CRA doesn't commit to a fixed processing time, and it varies with the complexity of the estate and CRA's workload — it's worth applying as soon as the estate's tax filings are complete rather than waiting until distribution is otherwise ready.

What if I've already made a mistake as executor — is it too late to fix it?

Not necessarily. Depending on the mistake, options can include amended filings, a taxpayer relief request, or in some cases the Voluntary Disclosures Program — but the right option depends heavily on the specific facts, so it's worth getting advice as soon as you realize something was missed rather than waiting.

Do these rules apply the same way to a small, simple estate?

The underlying obligations — the clearance certificate, the Estate Information Return, final-return elections — generally apply regardless of estate size, though a smaller estate with fewer assets and beneficiaries is often easier to administer correctly.

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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