You do not need to demonstrate a minimum amount of income to sponsor a spouse. However, whenever you sponsor a family member to Canada, you must sign an undertaking, in which you promise to provide financial support for the basic needs of your sponsored family member.

The length of the undertaking depends on the category of sponsorship. For spousal sponsorship (including spouses and common-law or conjugal partners), the length of the undertaking is 3 years from the day the sponsored individual becomes a Canadian permanent resident.