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When a married couple separates or divorces, the spouse with the higher income sometimes pays money to the spouse with the lower income to balance the financial impact of the divorce so that the outcome is fair. This money is called "spousal support".
In some provinces, support may also sometimes be required when common–law couples separate, especially if they have been together for a long time.

You and your former spouse can set up your own spousal support agreement out of court. Before you do so, it is strongly recommended that you seek legal advice because spousal support is a very complex issue and can be affected by many different factors. Just because a spouse is in a financially weaker position does not mean he or she is automatically entitled to support.
You may also wish to see if your province or territory offers family justice services such as mediation to help you negotiate an agreement.
If you cannot agree on spousal support, you can ask a judge to decide.
When making spousal support decisions involving divorced or divorcing couples, courts must base their decisions on rules set out in the federal Divorce Act. Provincial and territorial laws apply to common-law couples and to married couples until they apply for a divorce.
The Divorce Act sets out certain factors and objectives that a judge must consider when deciding whether a spouse is entitled to support when they divorce. These include:
If either spouse is paying child support, the judge must also figure out how a requirement to pay spousal support would affect child support payments. The Divorce Act clearly states that a judge must give priority to child support when a person applies for both child and spousal support. Both parents have an obligation to support their children.
The reasons the marriage ended do not affect a spouse’s legal obligation to support the other spouse following a divorce.
In an effort to make spousal support more predictable and consistent, the Department of Justice Canada contracted with two family law professors to develop some guidelines.
Unlike the Federal Child Support Guidelines, the Spousal Support Advisory Guidelines have not been legislated. They simply provide suggestions on the appropriate ranges of spousal support amounts and duration of support, in a variety of situations. This allows flexibility to deal with the diversity of marriages.
These advisory guidelines were developed for family law professionals to use when giving advice to clients. Additional tools for family justice professionals have also been developed that will help professionals use the Guidelines.
If you want to use them yourself to calculate spousal support, there are a few key points you should be aware of:
Entitlement to support is decided by a judge before he or she decides how much support you might have to pay or how much you might receive. Similarly, how long the support will be paid is decided after entitlement is established.
There are many factors that are taken into account when a judge considers entitlement. The relevant factors apply to men and women equally.