Are separation agreements binding in BC?
Yes. Under BC's Family Law Act an agreement that resolves a family law dispute binds the parties, whether or not it is filed in court and whether or not a lawyer was involved. A court can set aside the property or spousal support terms only on specific grounds, such as non-disclosure or a spouse not understanding the agreement, or where the agreement has become significantly unfair. Child support terms are always open to review against the Guidelines.
Binding by statute
Two or more people may make an agreement to resolve a family law dispute, or about a matter that may become one, and the agreement is binding whether or not there was consideration, a mediator or lawyer was involved, or it was filed in court. Filing is still worth doing: a filed agreement about child or spousal support is enforceable as if it were a court order.
Property terms
Where the agreement is in writing and each signature is witnessed, a court may set aside or replace the property terms only if, when the agreement was made, a spouse failed to disclose significant property or debts, took improper advantage of the other's vulnerability, did not understand the nature or consequences of the agreement, or there were ordinary contract grounds such as duress. Even then the court can leave the agreement alone if it would not make a substantially different order. Separately, a court can set aside an agreement that has become significantly unfair, weighing how long ago it was made, the spouses' intention to achieve certainty, and how far they relied on it.
Spousal support terms
The same grounds apply to spousal support terms, with one addition: significant unfairness is judged also against changes in a spouse's circumstances since the agreement and how well the agreement meets the statutory objectives of spousal support. A release of spousal support is permitted and, properly made, holds.
Child support terms
An agreement about child support binds only if made after separation or when about to separate. A court may replace any part of it if it would make a different order under the Guidelines, because child support is the child's entitlement, not the parents' to trade.
Time limits and legal advice
An application to set aside the property or spousal support terms must be brought within two years of the spouse discovering, or reasonably being able to discover, the grounds. Independent legal advice for each spouse is not required by the Act, but it is the best answer to a later claim that a spouse did not understand what they signed, and full financial disclosure is the best answer to the rest.
The law
Each link opens the section itself on BC Laws or Justice Laws. Checked on November 9, 2026.
- Family Law Act, SBC 2011, c 25, s 6 — agreements about family law disputes are binding
- Family Law Act, s 93 — setting aside agreements about property division
- Family Law Act, s 148 — agreements about child support
- Family Law Act, s 163 — agreements about spousal support, including a release
- Family Law Act, s 164 — setting aside agreements about spousal support
- Family Law Act, s 198 — two years from discovery of the grounds to apply
People also ask
- Does a separation agreement have to be witnessed?
- The protections against being set aside apply to a written agreement with each signature witnessed. A court can still apply the same test to an unwitnessed written agreement if it thinks that appropriate, but witnessing removes the argument.
- Can a separation agreement be changed later?
- By consent, yes, with a new written agreement. Otherwise only a court can set aside or replace terms, on the grounds the Act allows, and property and spousal support claims must be brought within the two-year limit.
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General information about the law in British Columbia, not legal advice. Laws change and every situation differs; speak to a lawyer before acting on anything here.