RESP for Grandparents: Contributing to a Grandchild's Education

RESP Basics: How Registered Education Savings Plans Work in Canada mentions that grandparents can open an RESP without going further into what that actually looks like in practice. Individual vs. Family RESP covers the relationship rules that let a grandparent include grandchildren on a family plan. This guide is about the situation many grandparents actually face: a plan already exists, opened by the parents, and the real question isn't "can I open one" but "should I open my own, or add to theirs" — and how to do that without accidentally working against the child's own contribution room.

Yes, grandparents can open and be the subscriber directly

Any adult can open an RESP and become its subscriber — a parent, a grandparent, another relative, or a family friend. A grandparent opening a plan directly for a grandchild, naming themselves subscriber, is completely valid on its own.

There's a specific nuance worth knowing if the goal includes the

Canada Learning Bond (CLB) specifically. CLB eligibility is based on the primary caregiver's income and family situation — generally whoever receives the Canada Child Benefit for that child — not on who the subscriber is. When the subscriber isn't the primary caregiver or their spouse (which is exactly the case for a grandparent opening a plan on their own), the RESP promoter generally needs additional information identifying the primary caregiver before the plan can receive the CLB. This doesn't block a grandparent from opening the plan or receiving the CESG on their own contributions — it specifically affects the CLB piece, and it's worth confirming the current paperwork requirement directly with the RESP promoter.

A grandparent can also open a family plan naming grandchildren as beneficiaries, the same relationship rules covered in Individual vs. Family RESP apply — grandchildren qualify, the same as a subscriber's own children. One detail carries over directly: the Additional CESG and the CLB are only paid into that family plan if every beneficiary in it is a sibling of the others.

More common in practice: contributing to the parents' existing plan

Opening a second plan isn't usually the first move most grandparents make — more often, a parent has already opened an RESP for the child, and the grandparent's real question is how to add money to it. This is generally the simpler path: most RESP promoters allow more than one person to contribute to the same plan with the subscriber's cooperation, and it sidesteps the coordination problem covered next entirely, since there's only ever one plan tracking one running total.

The coordination problem: one shared limit, not one per plan

This is the detail that makes the "separate plan vs. contribute to the existing one" decision matter financially, not just administratively. The $50,000 lifetime contribution limit applies per beneficiary, across every RESP that exists for them — not $50,000 per plan. A parent's plan and a grandparent's separate plan for the same child draw from that same shared pool of room, whether or not either side realizes it. RESP Contribution Limits covers the full mechanics of that limit and what happens when it's exceeded — worth reading in full if a separate plan is being considered — but the practical version here is: two uncoordinated RESPs for the same child can push combined contributions over $50,000 without either contributor intending to.

CESG matching room works the same way. The Canada Education Savings Grant matches contributions up to a $7,200 lifetime maximum per beneficiary, not per plan. A grandparent contributing to a separate plan without knowing how much the parents have already put in — and how much CESG room is already used — risks either accidentally exceeding the lifetime contribution limit, or simply contributing in a way that doesn't actually pull in any additional CESG because the annual matching threshold was already used up on the parents' plan that year.

Two practical approaches

Neither approach is automatically wrong. Contributing to an existing plan is usually the path of least friction. Opening a separate plan can make sense when a grandparent wants direct control over their own contributions, wants the plan to remain clearly theirs for estate planning reasons, or the family simply prefers two accounts — but it only works well with real coordination, not an assumption that "there's room" without checking.

The penalty for getting it wrong

Contributions that push a beneficiary's combined RESPs over the $50,000 lifetime limit trigger a 1% per month tax on the excess amount, charged to each subscriber based on their own share of the overcontribution — and it keeps accruing every month the excess isn't withdrawn. RESP Contribution Limits walks through the full mechanics, including how to fix an overcontribution once it's discovered. The short version for grandparents specifically: overcontribution from two uncoordinated plans is one of the single most common ways this penalty actually happens, precisely because it doesn't require anyone to be careless with one account — just uninformed about the other one.

If the grandparent subscriber passes away

This matters more for a grandparent who opens their own separate plan than one who simply contributes to a parent's plan. Without a successor subscriber named — either in the RESP contract itself or in the grandparent's will — the plan generally becomes part of the grandparent's estate when they die. That can mean the plan has to be collapsed, with government grant money returned and the estate owing tax on the investment growth, even though the family never intended to close the account. Naming a successor subscriber avoids this: the named person simply becomes the new subscriber and the plan continues uninterrupted, without going through the estate at all. Anyone opening a separate RESP as subscriber is generally better off confirming this detail with the RESP promoter when the plan is opened, not leaving it to be sorted out later.

A family coordinating contributions

The Whitmores' daughter and son-in-law opened an individual RESP for their granddaughter, Ruby, shortly after she was born, contributing $2,500 a year to capture the full Basic CESG match. When Ruby's other grandparents wanted to help too, they considered opening a second RESP in their own names — it felt like a natural way to keep their contribution clearly separate and visible.

Before doing that, they asked the parents how much had already been contributed and how much CESG room remained. It turned out the parents' plan was already on track to use up close to the full $7,200 lifetime CESG by contributing $2,500 annually — meaning any grandparent contribution beyond that wouldn't pull in extra grant money in a given year, though it would still use up lifetime contribution room and grow tax-deferred. Rather than opening a competing plan, the grandparents chose to contribute directly to the existing family plan, coordinating the amount each year so combined contributions stayed comfortably under the $50,000 lifetime limit. They also asked to be added as a named successor subscriber possibility, so their intentions for the account would be clear regardless of what happened long-term — a conversation that took one phone call with the RESP promoter, rather than a second account to track.

Common mistakes

• Opening a second RESP without checking existing contribution room first. A well-meaning grandparent contribution can push combined contributions over the $50,000 lifetime limit if no one checks what's already in the parents' plan.
• Assuming CESG and contribution room work per plan instead of per beneficiary. Both the $50,000 lifetime limit and the $7,200 lifetime CESG maximum apply to the child across every RESP that exists for them, not separately to each account.
• Not asking whether the parents' plan is already maximizing CESG for the year. A grandparent contribution timed without checking this can simply add contribution-room usage without pulling in any additional grant money that year.
• Opening a plan without naming a successor subscriber. Without one, the plan can become part of the grandparent's estate and potentially need to be collapsed if they pass away.
• Assuming the CLB works the same as the CESG for a grandparent subscriber. The CLB is tied to the primary caregiver's information, not the subscriber — a grandparent opening a plan alone may need additional paperwork identifying the caregiver before the plan can receive it.

Sources

• Registered education savings plan (RESP) — Canada Revenue Agency
• Registered Education Savings Plans contributions — Canada Revenue Agency
• Canada Learning Bond — Canada.ca
• InfoCapsule 5: Primary Caregiver — Employment and Social Development Canada

This article is general financial education, not personalized financial, legal, or tax advice. RESP coordination between multiple contributors, CLB paperwork requirements, and successor subscriber rules depend on individual account history and the specific RESP promoter's process — confirm your own situation with the RESP promoter or a financial professional before contributing or opening a plan.

What to do next

Before opening a separate RESP as a grandparent, the single most useful question to ask the parents is how much has already been contributed and how much CESG room is left for the year — that one conversation prevents most of the coordination problems covered here. For the fundamentals of how RESPs work, see RESP Basics: How Registered Education Savings Plans Work in Canada, and for the relationship rules that let grandchildren be named on a grandparent's own plan, see Individual vs. Family RESP. This is the ninth guide in an ongoing RESP series.