Spousal support, sometimes called alimony or maintenance, is when one spouse pays the lower-earning spouse money after a marriage ends. You may add clauses about spousal support, but they must be reasonable. For example, if a court finds them grossly unfair or unconscionable, they may be thrown out. For example, if by honoring the spousal support clause, it would place the lower-earning spouse on government assistance, then the clause will likely be thrown out.
You may waive spousal support altogether (again, unless it is grossly unfair or unconscionable). This says that neither party will be entitled to spousal support from the other. You can also do a partial waiver where only one spouse is no longer entitled to spousal support.
If you want to include spousal support in your prenup, here are some more ways you could write it in (these are not the only ways, but just an idea of what you can do). One way to do it is to include a fixed amount in a lump sum or monthly payment schedule. Keep in mind that lump sum spousal support is not tax-deductible, but monthly spousal support is tax-deductible. (Source: Behrendt, Prenup Essentials: What Canadians Need To Know, 2015)
Another way to do it is to calculate different amounts based on the length of the marriage. For example, if you are married for ten years, they get $10,000. If you are married for 15 years, they get $15,000, and so on and so forth. You could also include spousal support for a specific purpose, such as training or education purposes post-divorce (this would be good if one person was a stay-at-home parent).
You could also exclude certain sources of income for spousal support. For example, if you make money on rental properties, you may want to exclude this stream of income from the spousal support payment. Don’t forget to keep it reasonable; it’s a good idea to avoid excluding too much of your income. (Source: Behrendt, Prenup Essentials: What Canadians Need To Know, 2015)
Another option is leaving out a spousal support clause from your prenup altogether. In this case, the regular rules of spousal support will apply to you. If you’re curious about what spousal support would look like in Canada without a prenup, you can play around with scenarios with this spousal support calculator. (Source: Behrendt, Prenup Essentials: What Canadians Need To Know, 2015)