From living together to getting married: what changes legally when you tie the knot

You've been together a while. You've built a home. You're already each other's emergency contact. Then you get married. Beyond the photos and the cake, what actually changes?

Plenty of couples in England and Wales are already living together long before they get married. Often you've already done the big things: moving in, perhaps buying a place together, sharing a life. Marriage feels like the formal version of what you already have.

In some ways, it is. In other ways, the legal picture shifts more than couples realise. This blog walks through what changes when you marry, what stays the same and what to think about if you've been cohabiting first.

What changes legally on the day you marry

Marriage triggers a whole set of legal protections that don't exist for unmarried couples. The big ones:

Inheritance and tax

If your spouse dies without a will, you automatically inherit the bulk of their estate (assuming there are no children, the rules are different if there are). Anything you inherit from a spouse is exempt from inheritance tax. Without marriage, neither of those is automatic.

Pensions

As a spouse, you generally have a right to a portion of your partner's pension if they die. Cohabiting partners often don't, depending on the pension provider's rules.

Splitting assets

If you ever divorced, the courts have powers to redistribute property, savings, pensions and income to reach a fair outcome, regardless of whose name everything is in. Cohabiting couples have no such protection. What's yours is yours, what's theirs is theirs.

Maintenance

Spouses can claim financial support from each other after divorce in some circumstances. Cohabiting partners can't claim this when they separate (with limited exceptions, like child maintenance).

Foreign nationals

Marriage may affect immigration status, residency and visas in ways that cohabitation doesn't.

What stays the same

A surprising amount, actually.

Your debts stay your own. Marriage doesn't mean you suddenly inherit each other's loans or credit cards.

Your individual property mostly stays individual, though the courts can take it into account if you ever divorced. The longer the marriage, the more it tends to be treated as joint.

Your existing wills aren't automatically rewritten, but it's worth knowing that a will made before marriage is, in most cases, automatically revoked when you marry. So if you already have one, that needs sorting out.

Your day-to-day life doesn't have to change. Most couples carry on as before: same home, same routines, same Friday-night habits.

If you have a living together agreement, what now

A cohabitation agreement (also called a living together agreement) is written for unmarried life. Once you marry, it's no longer valid. The legal framework around your relationship changes and the agreement falls away.

That doesn't mean the conversations you had to put it together were wasted. Many couples find them a useful starting point for the conversations that go with a prenup, if they decide to put one in place. If you have a cohabitation agreement, dig it out, read it together, and use it as a foundation for a fresh conversation about what you'd want going into marriage.

Should you consider a prenup before the wedding?

A prenup gives any couple getting married clarity about how their finances will work, sets out what each of you wants in writing, and creates shared understanding before you start out as a married couple. Every couple can benefit from one.

It's particularly worth considering when you're bringing significantly different things into the marriage: different assets, different incomes, family money, a business, children from a previous relationship or expected inheritance. The conversation a prenup prompts is one of the most useful you can have together before the wedding.

Practical things to think about before the big day

Wedding admin gets all the attention. Marriage admin tends to get overlooked. A few things worth ticking off:

• Make or update your wills. As mentioned, marriage usually revokes any existing will, so you'll want new ones in place.
• Review your beneficiaries on pensions, life insurance and ISAs. Marriage doesn't always automatically update these.
• Talk through what you each own and earn, openly. If you haven't already, this is a good moment.
• Decide whether either of you is changing names, and what the admin trail of that looks like.
• Talk about whether a prenup is right for you, with enough time to get it done properly (signed at least 28 days before the wedding).

Bringing it all together

Whether you're already living together, recently engaged or somewhere in between, getting on the same page about the practical stuff makes everything else feel calmer. The earlier you talk it through, the simpler it all becomes. And the more grounded you'll both feel as you head into marriage.