Co-Executors in Ontario: How It Works and What to Do When They Disagree

It sounds like a fair solution: you have three children and you want to treat them equally, so you name all three as co-executors of your estate. Or you want one person's financial sense balanced with another person's attention to family dynamics, so you name two. In Ontario, naming multiple people as joint estate trustees is entirely legal — and sometimes exactly the right approach.

But co-executors must generally act unanimously. When that unanimity breaks down, the estate can grind to a halt, and beneficiaries — sometimes the co-executors themselves — suffer the consequences. Understanding how the role works, and planning for disagreement before it happens, is essential.

The Basic Rule: Unanimous Action

Under Ontario law, where two or more executors are appointed, they must generally act jointly — meaning all executors must agree on, and sign off on, each step of the administration. One co-executor cannot unilaterally sell a property, sign a bank document, or make a distribution without the other(s) on board.

This rule exists to protect beneficiaries from any single executor acting without accountability. But it also means that a single uncooperative co-executor can paralyze the estate.

There is a practical exception for truly ministerial or administrative acts that do not require a discretionary judgment call, but significant decisions — signing documents, moving money, authorizing professional fees, deciding whether to accept a settlement — require agreement.

Why People Name Co-Executors

Despite the unanimity requirement, co-executors are common in Ontario for good reasons:

• Fairness among children: naming all adult children avoids the perception that one was trusted more than others
• Geographic distribution: one executor in Ontario plus one out-of-province may seem balanced, though it can create complications
• Complementary skills: one executor has financial acumen; another has deep knowledge of the family and family dynamics
• Checks and balances: a co-executor provides oversight, reducing the risk of one person acting improperly
• Succession backup: if one executor dies or cannot act, the other continues

When Co-Executors Work Well

The arrangement works best when:

• The co-executors have a history of cooperating well and communicating openly
• They live reasonably close to each other (or are willing to use technology to coordinate)
• The estate is not excessively complex
• The co-executors do not have significantly different financial interests in the outcome
• The will includes practical provisions for resolving disagreements

When Co-Executors Run Into Trouble

Family dynamics escalate

Two siblings who got along reasonably well in life can find that managing their parents' estate, which may involve selling a family home or dealing with an unequal distribution, surfaces old tensions. Grief alone can make previously minor personality differences feel insurmountable.

One executor disengages

A co-executor who agreed to serve but finds the role overwhelming — or who simply does not respond to emails and calls — can stall every step of the administration. The other executor cannot legally proceed without them.

Disagreement about a specific decision

Should the family home be sold immediately or held for six months hoping the market improves? Should a particular debt be contested? Should the estate be distributed in cash or in-kind? Any of these decisions can become a flashpoint.

What Happens When Co-Executors Cannot Agree?

Ontario does not have a simple tie-breaking mechanism for equal numbers of co-executors. The options, roughly in order of escalation, are:

1. Negotiate — with professional help

A lawyer retained by the estate (not by either co-executor personally) can sometimes help co-executors reach a workable compromise. Getting the legal obligations on the table often clarifies what each person actually must do.

2. Mediation

An experienced estates mediator can help co-executors resolve specific disputes without the cost and adversarial nature of litigation. This is faster and cheaper than going to court and is particularly useful for valuation disputes or disagreements about which assets to sell.

3. Application to the court for directions

The Superior Court of Justice can give directions to co-executors on how to handle a specific dispute — for example, approving a particular sale price for a property, or instructing that a distribution take place. This is a formal process but can resolve one discrete issue without replacing anyone.

4. Application to remove one co-executor

If one co-executor is fundamentally obstructing the administration through bad faith or misconduct, the other co-executor (or a beneficiary) can apply to have them removed and replaced. This is a significant step and requires evidence of actual misconduct, not just disagreement.

Planning Ahead: Drafting Co-Executor Provisions

If you want to name co-executors in your will, your lawyer can include provisions that reduce the risk of deadlock:

Majority decision clauses

For estates with three or more co-executors, a majority vote clause allows the majority to act on most decisions without requiring unanimity. Be specific about what decisions require unanimous consent and which require only a majority.

Designated authority for geographic reasons

If co-executors live in different cities, designate which one has authority over particular tasks (e.g., the executor in Ontario handles local real estate; the one in Alberta handles matters in that province) to avoid every decision requiring coordination.

Dispute resolution provisions

Specify a process — mediation, arbitration, or reference to the estate lawyer for advice — that co-executors must follow before applying to court.

Alternate executor clauses

Allow one co-executor to step down and be replaced without full court involvement by providing a mechanism for the remaining executor to continue alone or appoint a named alternate.

Frequently asked questions