The Spousal Sponsorship Undertaking: What You're Committing To and How Long It Lasts

When you sponsor a spouse or partner to Canada, you sign a formal legal document called an undertaking. Many sponsors treat this as routine paperwork at the end of a long process. It is not. The undertaking is one of the most consequential commitments in Canadian family immigration law, and misunderstanding it leads to real financial harm for some sponsors years after their marriage has ended.

This article explains what the spousal sponsorship undertaking actually requires, how long the obligation lasts, what happens if you default, and how to think about it before you sign.

What Is the Undertaking?

The undertaking is a formal promise you make to the federal and provincial governments that you will financially support your sponsored spouse and ensure they do not need to collect most forms of social assistance — specifically, Canadian social assistance programs — during the undertaking period.

It is not a gentlemen's agreement. It is a legal obligation enforceable by both the federal government and by the province. If your spouse receives social assistance during the undertaking period, the government that paid that assistance can pursue you for reimbursement.

How Long Does the Undertaking Last?

As of writing, the undertaking for a sponsored spouse or common-law/conjugal partner is three years from the date the sponsored person becomes a permanent resident of Canada. This figure is set by federal regulation and can change — verify the current period on Canada.ca/IRCC before filing your application.

Compare this to the undertaking for a dependent child, which runs until the child is 25 years old or becomes a permanent resident (confirm on Canada.ca). The distinction matters if you are sponsoring your spouse along with dependent children.

What Does "Financial Support" Mean?

The undertaking requires you to:

• Provide for basic needs: food, clothing, shelter, and other essential needs
• Prevent your spouse from needing to rely on government social assistance programs during the undertaking period

You are not required to give your spouse a specific amount of money per month. But you are required to ensure that your household meets their basic needs to the point that they do not turn to social assistance. If they do receive it — even if your relationship has broken down and you are no longer living together — the obligation can still be enforced against you.

Divorce Does Not Cancel the Undertaking

This is the most important and least understood aspect of the undertaking, and it surprises many sponsors.

If your marriage breaks down, you and your spouse separate, and a divorce follows — the undertaking continues. It is an obligation to the government, not to your spouse personally. The length of the undertaking is measured from the date your spouse landed as a PR, and it runs its full term regardless of changes in the relationship.

Practically, this means: if your spouse receives welfare or other covered social assistance during the undertaking period because you are no longer together and they are struggling financially, the government can and does pursue sponsors for reimbursement. This can amount to thousands of dollars.

This reality has implications for how you approach separation negotiations. A family law lawyer and an immigration lawyer should both be involved if you are going through a separation during an active undertaking period.

What Is "Default" on an Undertaking?

A sponsor is in default when the sponsored person has received social assistance during the undertaking period and the government has determined that the sponsor bears responsibility. This can result in:

• A debt owed to the federal or provincial government
• Being barred from sponsoring again until the debt is fully repaid

The second consequence — the bar on future sponsorships — affects people who divorce and later want to sponsor a new spouse. If there is an outstanding default from the first sponsorship, the second sponsorship application will be refused.

Sponsored Person's Rights vs Sponsor's Obligations

The undertaking does not limit the sponsored person's rights as a permanent resident. Once your spouse has landed, they have all the rights of a permanent resident, including the right to work, access public education, use health care, and eventually apply for citizenship. The undertaking governs your financial obligations to the government — it does not give you control over your spouse's life or choices.

Planning Ahead

If you are considering sponsoring a spouse or partner, think about the undertaking not just as bureaucratic paperwork but as a financial commitment that deserves the same thought as any major joint commitment. Consider:

• What is your financial capacity to support your spouse for several years?
• What happens to that capacity if your income changes significantly?
• Are you prepared for the undertaking to continue even if the relationship does not?

None of this should discourage a genuine couple from sponsoring — the undertaking is manageable for most. But entering into it with clear eyes prevents unpleasant surprises.

Frequently asked questions