Two people who start living together nearly always settle this by habit, and the habit is either pooling everything or pooling nothing. Both work for a while, and both fail for the same reason: each one solves half the problem and ignores the other half, until the other half turns up.
What the household needs to see is the total, what living there costs and whether the numbers add up. What each person needs is autonomy, money they can spend without explaining anything to anyone. A joint account gives you the first and takes away the second. Separate accounts give you the second and take away the first.
The setup that gives you both is the three-account one, and despite the name it is not more complicated, just less obvious.
Joint or separate accounts: what does each one solve?
It is worth putting the three side by side before choosing, because the comparison is not about taste.
| Joint only | Separate only | Three accounts | |
|---|---|---|---|
| Seeing what the house costs | Yes | No | Yes |
| Each having their own money | No | Yes | Yes |
| Knowing who paid for what | No | Yes | Yes |
| Work to set up | Little | None | Some |
| Work to maintain | Little | A lot | Little |
The line that nearly always decides is the last one. Separate accounts cost nothing to start and cost one conversation a month forever, because somebody has to add up what each person paid and settle the difference. Multiply that by twelve months and by all the years to come.
How does the three-account setup work for a couple?
One account belongs to the house, and each person keeps their own.
The house account receives a transfer from each of them on payday, and it is where every direct debit and every household purchase comes out of: rent, electricity, water, internet, insurance, groceries. Nothing else. Each person's own account keeps the rest, and nobody answers to anyone about those.
Three decisions set this up, and then you do not touch it again:
- How much goes into the house account. It is the sum of household costs plus about ten per cent of slack, so that the month the electricity comes in high does not force an emergency transfer.
- In what proportion. Down the middle, or in proportion to what each earns. That is its own conversation and it is written up in splitting household costs.
- On what day. On each person's payday, by standing order. If it depends on someone remembering, it will fail in a month when it matters.
What goes into the joint account and what does not?
Whatever both people consume without being able to tell who consumed it.
The rule is the same one that governs splitting costs, and it is worth keeping short: rent or mortgage, utility bills, building charges, home insurance, groceries and cleaning supplies. Out goes clothing, each person's phone, the gym, presents and lunches out.
There is a strong pull towards widening what belongs to the house until everything belongs to the house, and that is where the setup breaks: the house account becomes a disguised joint account and the autonomy disappears again. If you are unsure about a cost, the question is "if I lived alone, would this still exist?". If yes, it is probably yours.
A joint account is not a place for savings
This is the practical part almost nobody mentions, and it avoids hard conversations.
In an account with two holders, either one can move all of the money, and that is exactly what makes it useful for paying for the house and bad for holding savings. It is not a matter of trust: savings need to know whose they are, and a joint account erases that information by construction. If one of the two saved up before, or is saving for something of their own, that lives in their own account.
The same goes for the household emergency fund. It can and should live in the joint account, as long as both know it is the household's money and not a balance that happens to be left over and available to spend.
When are separate accounts on their own enough?
When the household is temporary or the shared costs are few.
Housemates who split rent and bills, with no shared groceries and no joint financial life, do not need to set up a house account. An agreement on who pays which direct debit and a list holding the settlements is enough.
What has to exist either way is the list. Separate accounts with no record at all is the setup that produces the question "how much have I paid this month?", and that question has no good answer ten days later. That is precisely what Mayora exists for: an expense entered by one appears to the other with the same amount, and there are never two versions of the same week.
And if one of you does not want a joint account?
Then you do not pool, and you build the setup with one account.
There are perfectly good reasons not to want a joint account, and some of them are not about the relationship: an earlier separation that went badly, a business of your own, an old debt. Insisting is worse than solving it another way.
The alternative that works is for one of the individual accounts to become the household's operating account: the direct debits come out of there, the other person transfers their share on payday, and everything belonging to the house is recorded where both can see it. You lose the neutrality of "the household's money" and you keep the essential part, which is having one place where household costs happen.
What does not work is each paying whatever comes up and talking about it at the end of the month.
Where to start with a joint account, today
Three steps, and the third is the one that prevents next month's conversation.
- Add up the household costs and add ten per cent. That is what the house account needs to receive each month.
- Decide the proportion and the day. Down the middle or proportional, on each person's payday, by standing order.
- Write down what belongs to the house. A short list, made once, is worth more than deciding cost by cost for a year.
And if you do not yet know what the house costs per month, that is where this starts, not with the account: the number comes before the setup, and how you arrive at it is in fixed bills and variable spending.
We keep a page of frequently asked questions about budgeting and everyday money, with a short answer to each one and the full piece one click away. If you want to see it, it is here: frequently asked questions.
This is educational writing. It is not financial advice or an investment recommendation; for advice on products, speak to a professional registered with the CMVM.