The Cost of Probate Avoidance vs. the Estate Administration Tax It Actually Saves in Ontario

Trusts, carefully structured joint ownership, and multiple wills can all reduce the portion of an estate that goes through probate — and with it, the Estate Administration Tax that comes due. But none of those tools are free to set up or maintain. The real question isn't whether probate avoidance saves tax at all — it generally does, on the assets it actually keeps out of the estate — it's whether the savings are large enough to justify what the planning costs in the first place.

That answer depends heavily on the size and shape of the estate, which is why this is a question worth working through deliberately rather than assuming one way or the other.

The Tax You're Trying to Avoid, in Plain Terms

As of mid-2026, Ontario does not charge Estate Administration Tax on the first $50,000 of an estate's value. Above that threshold, the tax applies at roughly 1.5% of the value above $50,000. These figures have been in place since 2020, but tax rates and thresholds can be updated — verify the current numbers before relying on them. The tax applies only to the portion of the estate that actually requires a Certificate of Appointment of Estate Trustee; assets that already pass outside probate through joint ownership or a named beneficiary aren't part of that calculation at all.

The Other Side of the Ledger: What Avoidance Planning Costs

Reducing probate exposure isn't a one-time, no-cost decision. Depending on the strategy, the costs can include:

• Legal fees to draft a trust, or to draft and coordinate a primary and secondary will, rather than a single straightforward will
• Costs to formally re-title real estate, investment accounts, or company shares into a trust's name
• Ongoing accounting fees for a trust's separate annual tax filings
• The complexity — and potential family friction — of maintaining joint ownership arrangements
• The time and professional guidance needed to keep the plan properly maintained as circumstances change

None of these costs are fixed figures that apply the same way to every estate; they scale with how much structure the plan actually requires.

Why the Math Shifts With Estate Size

Because Estate Administration Tax applies only above a set threshold and scales with the value above it, the amount of tax that avoidance planning could theoretically prevent grows as the value of the estate's probate-bound assets grows. For a modest estate sitting close to that threshold, the tax exposure being avoided is inherently limited — there's only so much tax to save. For a larger estate, particularly one that includes assets like private company shares or substantial real estate holdings, the tax exposure — and therefore the potential benefit of avoidance planning — is proportionally larger.

This is a relationship, not a specific number: as the value being protected grows, the argument for taking on the added complexity of avoidance planning generally strengthens. A lawyer or accountant can run the actual figures for a specific estate; this article is describing the shape of the trade-off, not calculating it for any individual situation.

When Avoidance Often Isn't Worth It

• The estate is modest and sits close to the tax-free threshold to begin with
• Most assets already pass outside probate through joint ownership or named beneficiaries, with little left that would actually be affected
• The estate is simple — a single owner, a small number of assets, no business interests
• The person doesn't want the ongoing administrative burden a trust or multi-will structure requires

When It's Often Worth Considering

• The estate includes significant real estate, investments, or private company shares that don't already pass outside probate
• There's a business succession component where a secondary will could meaningfully reduce tax exposure on company shares
• The estate is large enough that even a modest percentage difference in tax represents a meaningful dollar figure
• There are other planning goals — control over timing of distributions, protecting a vulnerable beneficiary — that a trust would serve anyway, making the probate savings a secondary benefit rather than the whole justification

A Framework for Deciding

• [ ] What portion of my estate would actually be affected by this strategy?
• [ ] What would the legal and ongoing accounting costs realistically be?
• [ ] Does this strategy serve any goal beyond tax savings — control, protection for a vulnerable beneficiary, business succession?
• [ ] Am I comfortable with the added complexity and ongoing maintenance this requires?
• [ ] Has a lawyer or accountant actually run the numbers for my specific estate, rather than a general rule of thumb?

Frequently asked questions