Yes — already cohabiting does not stop you getting a prenup, as long as you are planning to marry. A prenup is about the marriage, not about whether you currently live together. In fact, living together first often makes the process easier, because you already have a clear, shared picture of your finances and how you handle money day to day.
Cohabiting now, marrying soon
Plenty of couples live together for years before the wedding. Making a prenup simply sets out how your finances would be handled once you are married, if the marriage were ever to end. Nothing about sharing a home now prevents that — the agreement looks forward to married life, not back at your current living arrangement. And because you already know each other’s financial habits, the conversation and the disclosure tend to be more straightforward (see what to include).
Why marriage changes your legal position
This is the crucial point that many cohabiting couples do not realise. In England & Wales, there is no such thing as “common-law marriage”. Living together, even for a long time, does not give you the financial claims that marriage does. When you marry, a whole framework of rights and potential claims comes into being — which is exactly why a prenup becomes relevant. A prenup shapes how that new framework would apply to you (see what happens without a prenup).
Cohabitation agreement vs prenup
The right document depends on where you are:
| Cohabitation agreement | Prenup | |
|---|---|---|
| When it applies | While you are unmarried and living together | Once you are married |
| Deals with | Property, bills and assets as an unmarried couple | How finances divide on divorce |
| Best if | You are not (yet) planning to marry | You are planning to marry |
Many couples move from one to the other: a cohabitation agreement now, and a prenup when the wedding is on the horizon (see prenup vs cohabitation agreement and combining finances before marriage).
What if we have already married?
If the wedding has already happened, it is not too late — you simply make a postnuptial agreement instead, which does the same job after marriage. And if you are cohabiting with no firm plan to marry, a cohabitation agreement is the better fit for now (see do you need a prenup?).
The common-law marriage myth
It is worth dwelling on this because so many cohabiting couples get it wrong. Surveys repeatedly show that a large share of people believe that living together for long enough gives them “common-law” rights similar to marriage. In England & Wales, that is simply not true — there is no such status, however many years you share a home, a mortgage and children. If an unmarried couple separates, neither has the automatic financial claims that spouses have; disputes are resolved under property and trust law, which is far narrower and often harsher. Marriage is the event that switches on the whole framework of matrimonial claims (see what happens without a prenup and prenup versus cohabitation agreement). A prenup exists precisely because marriage changes your position so dramatically — and it is the tool for shaping how that new framework applies to you.
Why living together first can make the prenup better
Far from being an obstacle, a period of cohabitation often produces a stronger agreement. You already know each other’s spending habits, income and attitudes to money, so the honest conversation a prenup requires is one you have effectively been having for years. Your disclosure is easier to compile because your finances are already visible to each other. And you have real-world experience of how you share costs — a mortgage or rent, bills, a joint account — which helps you design terms that fit how you actually live rather than a guess at how you might (see combining finances before marriage). Couples who marry after cohabiting tend to draft calmer, more realistic agreements for exactly this reason.
What about a home you already own together?
Many cohabiting couples buy a property together before marrying, and this is one of the most useful things a prenup can address. The agreement can record how you would treat a jointly owned home if the marriage ended — reflecting unequal deposits, a family gift towards one partner’s share, or an intention to split any equity in defined proportions (see buying a house together before marriage and what happens to the house). If you already have a declaration of trust from when you bought, a prenup can sit alongside it and confirm your intentions for the married stage of your lives. Capturing this while you are getting on well removes a frequent source of conflict later (see joint versus separate property).
From cohabitation agreement to prenup: a natural progression
A sensible path for many couples is to have a cohabitation agreement while they are unmarried, dealing with property and outgoings as an unmarried couple, and then make a prenup once the wedding is on the horizon. The two documents govern different phases: the cohabitation agreement while you live together unmarried, the prenup once you are married and the matrimonial framework applies. Treating the prenup as the natural next step — rather than starting from scratch — makes the whole thing feel like continuity rather than an awkward new negotiation (see do you need a prenup?). If the wedding has already happened, a postnup does the same job just as well.
Does living together weaken the case for a prenup?
Some cohabiting couples assume that because they have already pooled a lot of their lives, there is little left to protect and a prenup is beside the point. Usually the opposite is true. The longer you have lived together, the more likely it is that one of you brought in assets the other did not, that you have bought property together, or that your finances have become entangled in ways that would be hard to unpick later. Marriage will then apply the full matrimonial framework to all of it, so a prenup that records what each of you considers separate — and how you would treat what is shared — becomes more valuable, not less (see matrimonial versus non-matrimonial property). Cohabitation is not a substitute for an agreement; it is often the very reason one is worth having (see joint versus separate property).
Timing it around the wedding once you decide to marry
For a cohabiting couple, the trigger for a prenup is the decision to marry, and the same timing rules then apply as for anyone else: sign well before the wedding, ideally months ahead and at least the 28 days the Law Commission suggested as a minimum, so there is no hint of last-minute pressure (see when to sign a prenup and duress and prenups). The good news is that living together already puts you ahead: your finances are visible to each other, so disclosure is quick, and the conversation about money is one you have effectively been having for years. That head start makes it realistic to have a calm, well-advised agreement in place long before the day (see how long a prenup takes). If the wedding is already very close, you can still make a postnup calmly afterwards instead.
Getting a prenup when cohabiting
Already cohabiting does not stop you getting a prenup, as long as you are planning to marry — a prenup is about the marriage, not about whether you currently share a home. If anything, living together first can make it easier, because you already have a clear picture of your joint finances. While unmarried, a cohabitation agreement governs your position; once you marry, the prenup takes over, because marriage gives partners financial claims that cohabitation does not.
Frequently asked questions
Can cohabiting couples get a prenup?
Yes, if they plan to marry (see do you need a prenup?).
What if we do not plan to marry?
A cohabitation agreement fits better than a prenup.
Does living together give us common-law rights?
No — there is no common-law marriage in England & Wales, however long you cohabit.
Does cohabiting first make the prenup easier?
Often yes — you already know each other’s finances, so disclosure is simpler (see full and frank disclosure).
We own a home together already — can a prenup cover it?
Yes — a prenup can record how a jointly owned home is treated on divorce (see buying a house together before marriage).
Should we convert our cohabitation agreement into a prenup?
Effectively yes — make a prenup before the wedding, as marriage changes your legal position (see prenup vs cohabitation agreement).
Create your prenuptial agreement online
UK Prenup lets couples in England & Wales create a clear, fair prenuptial agreement online from £199, with your document generated instantly as a PDF. See how it works or get started.
UK Prenup is not a law firm and does not provide legal advice. A prenuptial agreement in England & Wales is not automatically binding, and both partners should take independent legal advice before signing.