Post Nuptial Agreement

What is a Post Nuptial Agreement or PostNuptial Contract or Postnup?
A post nuptial agreement is simply a prenup that is entered into after marriage. In terms of content of the agreement, it is precisely the same as a prenup, and all the information on this website applies equally to prenups and postnups.

What is the legal status of Postnups in Canada?
Postnuptial agreements are permitted in Canada. You can enter into a prenup at any time, either before or after marriage. As a practical matter, the main difference really is that after marriage these agreements can be difficult to complete, as one party simply drags their feet or refuses to sign.

Will a Postnup really protect me?
It can protect you the same as a prenup can protect you. However, as discussed below, courts treat them with special caution, and when entering into one, you should be thinking in terms of protecting *future* assets rather than currently existing ones.

Are there any legal concerns about Post Nuptial Agreements?
Yes, absolutely. In determining the validity of a postnup, courts treat them with special caution. Even though the agreement may be exactly the same as a prenup, from a legal perspective, they are very different. This is because before you are married, you have no special legal rights or obligations to the person whom you are about to marry. Therefore, in legal theory at least, no one is giving up any rights when entering into a prenup.

However, the day you get married, you acquire various family law rights and obligations to and from your spouse. So, when you enter into a post nuptial agreement, normally at least one person will be giving up legal rights that they already have. There is nothing wrong with this, but a court will be extra cautious in examining the circumstances surrounding why a postnup was entered into when determining the validity of a postnup. So, you will need to be extra cautious in documenting this through legal counsel, and take extra care to ensure that the agreement is fair.

When are Post Nuptial Agreements used?
There is no right or wrong time for a postnup. One of the most common circumstances I’ve seen where a postnup is used is when the parents of one spouse are giving the married couple a matrimonial home as a gift. In that case, the parents may want to ensure that their child keeps the home in case the relationship ends. The parents may make the gift of the home conditional on the married couple entering into an agreement stating that their child keeps the home in case of separation. Such an agreement is likely to be upheld by a court, since: (a) the other spouse gets the benefit of living in a nice home while the relationship is intact; and (b) the other spouse is not losing anything by entering into the agreement – if they didn’t sign the agreement, they would not have a nice home being gifted to their spouse.

Another common postnup example is when couples enter into an agreement because it is required for a business venture. As part of a partnership agreement or shareholders agreement, there may be a requirement to enter into a postnuptial agreement ensuring that spouses of partners or shareholders do not gain any ownership or control of the business. Such an agreement is likely to be upheld by a court.

My spouse wants me to enter into a postnup waiving all spousal support – is this possible?
This is an example of a type of agreement that will likely be found invalid by a court. Once you marry, you have automatic rights and obligations in regards to spousal support. It would be a very unlikely set of circumstances where a court would permit someone to waive these rights completely after marriage. The suspicion would be that the agreement is really just a separation agreement in disguise and is done as a prelude to breaking up.

We were just married recently – what’s the situation for us?
If you were just married recently, you can be a lot more flexible with a postnuptial agreement. The reason for this is that, although when you get married, certain family law rights and obligations arise, it is unlikely that a newlywed couple has significant financial obligations to each other shortly after getting married. As well, many couples start negotiating a prenup prior to marriage, but simply are not able to retain lawyers and get the agreement prepared prior to marriage due to time, financial, and other constraints. Simply because you missed getting your prenup done prior to your marriage does not mean you can no longer go ahead with it.

What’s the cost and process?
The cost and the process is the same as for a prenup. You can read about the cost here and the process here.

You’re Invited to Call or E-Mail!

If you’re considering a post nuptial agreement — or have already made your decision — you’re invited to call or email us. We’ll explain for free how you can protect your assets and plan your estate. You can call us toll-free at 855-PRENUP-4 or email us using our contact form here. We can help you anywhere in Ontario, including Ottawa, Toronto, Mississauga, Brampton, Hamilton, London, Markham, and Vaughn.


  1. Hello:

    I understand from your web site that this consultation would be free. If so, please answer the following. If we were to proceed, we would work through you, which at that time, I assume, fees would come into place, correct?

    I am considering asking my wife of 28 years for a postnup. The reason is that I feel, rightly or wrongly, that she hogs the vast majority of our disposable income. What I would propose is a separation of our finances. That is, all joint bank accounts, credit cards and debts (debts are few, <$12,000) be eliminated. We would then just set up our own bank accounts, lines of credit, credit cards etc in our own names. From then on, all income, debts and assests in her name would be hers and all debts, income and assests in my name would be mine. In the event of a divorce, she walks away with all that is in her name and I walk away with all that is in my name. And finally, we simply divide the net proceeds from the sale of our house. The intent here is not to set up for a divorce but to ensure I get my fair share going foward and into retirment in 6 or 8 years or so. I do not know what her reaction to this proposal would be. However, if she did agree, would such an agreement work. we make approximately the same amount (me about 15% more) and our investment balance favors her right now.

    Thank you,
    Frank (not my real name)

    • @Frank – Yes, this sort of arrangement could be possible, provided you and her are equalizing your net family properties first. In other words, you are dividing your assets as if you were separating, then in the future what’s in your name remains yours, and what’s in her name remains hers. A prenup or post nup can also deal with how family finances are to be handled, which seems to me to be a larger issue in your case.

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