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The Real Risks of DIY and Online Will Kits in Ontario

DIY will kits look cheap but can cost your family far more. Learn the real risks of online will kits in Ontario and what to do instead.

Wills & Estates5 min readTSLBy the Treadstone Law team · OntarioUpdated 2026-06
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Key takeaways
  • A DIY will kit is a fill-in-the-blank template — sold in a stationery store, downloaded as a PDF, or completed through a web app — that lets you name your executor and beneficiaries…
  • Wrong Signing or Witnessing Ontario has strict formal requirements for a valid will.
  • A defective will can actually complicate estate administration more than dying without one (dying intestate) because it creates a dispute.

A blank template costs ten dollars. A few clicks and your will is done — or so the sales page says. If you have been putting off estate planning because lawyers feel expensive or intimidating, the appeal of a DIY or online will kit is completely understandable. But the risks of DIY will kit Ontario residents face are real, and they fall on the people you leave behind — not on you.

This article explains how online will kits work, where they commonly fail under Ontario law, and why a document meant to save money sometimes leaves a family worse off than if there had been no will at all.

What DIY and Online Will Kits Actually Are

A DIY will kit is a fill-in-the-blank template — sold in a stationery store, downloaded as a PDF, or completed through a web app — that lets you name your executor and beneficiaries without involving a lawyer.

The promise: same legal result, fraction of the cost. And to be fair, a simple kit handled carefully by a careful person with uncomplicated assets can sometimes work. The problem is that most people do not know what "careful" and "uncomplicated" actually require under the Succession Law Reform Act and related Ontario legislation — and the kit rarely tells them.

Where DIY Wills Go Wrong in Ontario

Wrong Signing or Witnessing

Ontario has strict formal requirements for a valid will. In most cases the will must be signed by the testator in the presence of two witnesses, who must also sign in the testator's presence. Neither witness should be a beneficiary or the spouse of a beneficiary, or the gift to that person may be void.

Online kits often describe these rules in a short paragraph that is easy to skim past. A will signed with only one witness, or witnessed by a beneficiary's spouse, may be invalid — meaning the court treats it as if it never existed.

Missing Residue Clause

The "residue" is everything left over after specific gifts are made. Without a residue clause, any assets not explicitly named in the will fall outside it and are distributed under Ontario's intestacy rules — which may not match your wishes at all.

Many templates either omit a residue clause entirely or include one so vague that disputes arise over what it covers.

Ambiguous or Incorrect Beneficiary Names

"My daughter Sarah" sounds clear until there are two Sarahs in the family or until Sarah has legally changed her name. "My spouse" can cause problems if there was a separation but no divorce. Ontario courts interpret wills based on what the document says, not what you meant — and litigation to resolve ambiguous beneficiary language is expensive.

No Alternate Beneficiaries

What happens if your primary beneficiary dies before you? Without an alternate beneficiary named, that gift may lapse and fall into the residue — or, if there is no residue clause, into intestacy. A good will accounts for the possibility that people predecease you.

Assets That Never Flow Through Your Estate

This is one of the most common misunderstandings DIY kits create. RRSPs, RRIFs, TFSAs, life insurance policies, and jointly held property generally pass outside your estate entirely — directly to a named beneficiary or surviving co-owner. Your will has no power over them.

People often write a will saying "I leave my RRSP to my son" without realizing that if a different beneficiary is designated on the RRSP itself, the RRSP beneficiary designation wins every time, regardless of what the will says. Worse, if no beneficiary is named on the plan, the proceeds collapse into the estate, triggering tax and probate costs that careful planning could have avoided.

No Guardianship Clause for Minor Children

If you have children under 18, your will is one of the few places where you can express your wishes about who should care for them if both parents die. A DIY kit that does not include a guardianship clause — or that prompts you for one but leaves it blank — misses a critical piece of estate planning.

Ontario courts are not bound by a guardianship nomination, but they do give it serious weight. Without one, the decision is left entirely to the court.

Out-of-Date Beneficiary Designations

A will you wrote before a marriage, divorce, new child, or business acquisition can actively harm your family. In Ontario, marriage generally revokes a prior will (with limited exceptions). Divorce does not automatically revoke a will, but it does affect how gifts to a former spouse are treated. If your kit-generated will was never updated after a major life event, it may reflect a family picture that no longer exists.

When a DIY Will Can Be Worse Than No Will

This is the counterintuitive part. A defective will can actually complicate estate administration more than dying without one (dying intestate) because it creates a dispute. The court may need to decide whether the document is valid, what it means, and whether a prior will was revoked. That litigation costs money and time — and the fees come out of the estate your family was supposed to inherit.

What Dying Intestate Means in Ontario

If you die without a valid will, the Succession Law Reform Act dictates who gets what. As of writing — verify the current thresholds — a surviving spouse receives a preferential share off the top, with the remainder split between the spouse and children in proportions set by statute. If you have no spouse and no children, the estate passes to parents, then siblings, then more distant relatives.

Ontario's intestacy rules are blunt instruments. They cannot:

A Flat-Fee Alternative That May Cost Less Than You Think

Many people assume a wills lawyer charges what they cannot afford. At Treadstone Law, simple and moderately complex wills are available for a transparent flat fee — no billing surprises. A properly drafted will is almost always cheaper than the legal fees to fix a defective one, and it is always cheaper than prolonged estate litigation.

Frequently asked questions

Can an online will kit ever be valid in Ontario?

Yes — a will produced by a kit can be legally valid if it meets all formal requirements under Ontario law: proper signing, correct witnessing, clear language, and accurate reflection of your assets and wishes. The risk is that most people do not realize when those requirements have not been met. The document looks finished even when it is not.

What happens to my house if my will is invalid?

Real property that you own alone (not jointly) passes through your estate. If the will is invalid, the house is distributed under Ontario's intestacy rules — which may mean it goes to people you did not intend, in proportions you did not choose, after a potentially lengthy administration process.

Does getting married cancel my will in Ontario?

Generally, yes. Marriage revokes a will made before the marriage unless the will was made in contemplation of that specific marriage and says so explicitly. If you wrote a will before your wedding and never updated it, Ontario law may treat you as having died intestate — even though a signed document exists.

How much does a simple will actually cost with a lawyer?

Costs vary by complexity, but a straightforward will from Treadstone Law is available for a flat fee that most people find far more affordable than expected — and far less than the cost of fixing an invalid will after death. Call 1-844-900-1070 or visit our pricing page for current rates.

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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