Moving In Together: Splitting It Fairly

Have the conversation before the tenancy

Moving in together is usually treated as a romantic decision with some admin attached. Financially it is a decision to merge part of two systems that have been running independently for years, each with its own assumptions about what things should cost and what money is for.

The awkwardness of discussing it beforehand is much smaller than the awkwardness of discovering the mismatch afterwards, when there is a tenancy in place and one of you is quietly resentful about the food shop. Four things are worth putting on the table explicitly:

• What each of you actually earns. Not a rough sense — the take-home figures. You cannot split anything fairly without them.
• What each of you owes. Student loans, credit cards, car finance, anything with a monthly payment. This is the conversation people most want to avoid and the one that matters most.
• What you each think is normal. Someone who has always cooked at home and someone who eats out four nights a week are not going to agree about a food budget by accident.
• What you are each saving for. Individual goals do not disappear because you now share a kitchen, and treating them as though they have is a reliable source of friction.

Splitting costs: halves, or proportions?

Fifty-fifty is the obvious default and it works well when incomes are similar. When they are not, it quietly transfers financial pressure onto the lower earner, because the same absolute amount is a much larger share of their pay.

Neither approach is morally correct. What matters is that you have chosen one deliberately and both understand why. The proportional split leaves both people with the same share of their income free, which is usually what people mean by fair when they think about it properly. The even split is more straightforward and can feel more equal in a relationship where one person’s income is expected to change.

A middle option that works well: split housing and bills proportionally, and split genuinely optional joint spending — holidays, meals out — evenly, since those are choices you both make.

How to set up the accounts

Three structures cover almost everyone.

The middle option is the one that works for most people moving in together for the first time. Work out the total shared cost, decide each person’s share, and set up standing orders into the joint account for the day after each of you is paid. Everything left in your own account is genuinely yours, with no negotiation and no mental accounting.

The detail that makes it work is funding it on payday. A joint account topped up when it runs low is a source of arguments; one funded automatically on a fixed date is furniture.

The legal gap nobody expects

This is the part that genuinely surprises people, so it is worth stating flatly: there is no such thing as common-law marriage in England and Wales. Living together for years, having children together, and calling each other partners creates no automatic financial rights or obligations between you. Scotland gives cohabiting couples some limited rights, but far fewer than marriage.

In practice that means an unmarried partner has no automatic right to a share of property in the other’s name, no automatic inheritance if there is no will, and no equivalent of the financial provisions that follow a divorce. Two practical consequences:

• If you buy together, decide how you hold it. Joint tenants means you own it jointly and it passes automatically to the survivor. Tenants in common lets you own defined shares — useful if you contributed unequal deposits — and those shares pass under your will, not automatically. If deposits are unequal, a declaration of trust recording who put in what is worth the modest cost.
• If you rent together, understand joint and several liability. On a joint tenancy each of you is liable for the whole rent, not half. If your partner stops paying, the landlord can pursue you for all of it.

Making a will is the other obvious step, and it is cheap. Without one, an unmarried partner may inherit nothing regardless of how long you have lived together.

The admin worth doing in the first month

A handful of small things, most of which save money:

• Council tax. If either of you was claiming the 25% single person discount, it ends when a second adult moves in. Tell the council — failing to is treated seriously and the arrears arrive eventually anyway.
• Duplicate subscriptions. Two streaming accounts, two cloud storage plans, two broadband contracts during an overlap. This is the easiest money either of you will ever save, and it repeats every month. Our subscription cost calculator shows what the duplicates come to over five years.
• Insurance. Contents insurance for a shared home, and check whether either of you is still insuring an address you have left.
• Update your address everywhere. Bank, employer, licence, electoral roll. Being on the electoral roll at your current address genuinely helps your credit file.
• Agree what happens if it does not work out. Unromantic and worth ten minutes. Who keeps the tenancy, how a shared deposit gets divided, what happens to anything bought jointly.

Rebuild both plans, not one

Your individual budgets have both changed. The shared amount leaving on payday is now a fixed committed cost for each of you, and what is left is the honest picture of your own position — usually different from what either of you was used to, sometimes in a good way, since two people splitting rent is generally cheaper than two people paying it separately.

The temptation is to let the joint account become the only thing anyone looks at. Resist it. Two people who each know what is spare in their own position, and who have agreed what they contribute jointly, argue about money far less than two people sharing one balance that neither of them fully understands.

Frequently asked questions

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