Insights · Family & Marriage Law

The Prenup, Done Properly: Protection That Actually Holds

A marriage or cohabitation agreement is not about expecting the worst. It is about deciding things calmly now, while you still can.

Published 24 October 2026 · Last verified 24 October 2026 against Ontario and federal law · By the Yu Sheng Family & Marriage Law Team

Two names, one idea

A marriage contract (before or during marriage) and a cohabitation agreement (for common-law couples) let partners decide in advance how property and support will be handled if the relationship ends. A cohabitation agreement automatically becomes a marriage contract if the couple later marries.

What it can and cannot cover

These agreements can address property division and spousal support. They cannot pre-decide decision-making responsibility or parenting time for children, and they cannot remove a spouse's right to possession of the matrimonial home.

The reasons these agreements fail are predictable: signed on the eve of the wedding, no real financial disclosure, no independent legal advice, or one party clearly pressured. The protection you want only holds if the agreement is built to survive a challenge.

Why timing and advice matter

An agreement negotiated well in advance, with full disclosure and separate lawyers, is far harder to attack later. One rushed through at the last minute invites exactly the dispute it was meant to prevent.

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法律资讯 · 家庭婚姻法

婚前协议,做对才有用:真正站得住的保护

婚姻协议或同居协议,不是“做最坏的打算”,而是趁你们还能心平气和的时候,把事情先定下来。

2026年10月24日发布 · 2026年10月24日对照安省与联邦法律核实 · 作者:禹晟家庭婚姻法团队

两个名称,一个思路

婚姻协议(marriage contract,婚前或婚内)与同居协议(cohabitation agreement,针对同居伴侣),让伴侣预先约定:关系结束时财产与抚养如何处理。若日后结婚,同居协议会自动转为婚姻协议。

能约定什么、不能约定什么

这类协议可以处理财产分割与配偶抚养费,但不能预先决定子女的决策责任或育儿时间,也不能剥夺配偶对婚姻住宅的居住权。

这类协议失败的原因都很好预料:在婚礼前夜仓促签署、没有真正的财务披露、没有独立法律意见、或一方明显被施压。你想要的那份保护,只有在协议被构建得“经得起挑战”时才站得住。

为什么时机与意见很重要

一份提前充分协商、双方完全披露、各请律师的协议,日后要推翻就难得多;一份最后一刻赶出来的协议,恰恰会招来它本想避免的那场争议。

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