Moving in together: how to split rent, bills and the first big purchases
How to split costs when you move in with a partner: three buckets for shared money, equal vs proportional rent, who pays for the sofa, and a month that settles in one go.
The first month in a shared flat is expensive in a way nothing before it was. Deposit, first rent, a sofa, a fridge that turns out not to be included — and it all lands on two different cards at different times. Most couples never decide how to split any of it. They just pay, and six weeks later one of you is quietly a few hundred euros behind.
The fix is not a serious talk about money. It is a small amount of structure, agreed before the first big purchase: sort every cost into one of three buckets, pick one rule per bucket, and keep one shared record of who paid what.
The three buckets
Almost every cost of living together falls into one of three groups; the mistake is treating them as one.
1. Running shared costs. Rent, utilities, internet, groceries, the streaming subscription you both use. They recur and they are genuinely for both of you, so this bucket needs a standing rule — equal or proportional — that you apply without thinking.
2. One-off shared purchases. The sofa, the fridge, the bookshelf you chose together. Two questions hide in each one — how do we split the cost, and whose is it? — and both get decided when you buy, not remembered afterwards.
3. Personal stays personal. Your phone, their gym, clothes, the gift for a friend only one of you knows. None of it goes through the shared record. Say this out loud, because without it every card payment becomes a question.
Equal or proportional for the running costs
There are two sensible rules for bucket one, and both are covered in detail elsewhere: expense splitting for couples walks through the 50/50, by-income and by-category models, and when one partner pays for everything covers a split that has already drifted.
The short version: equal is the right default when incomes are close, because it is easy to explain and nobody feels tracked. Proportional to income is the usual answer when one of you earns noticeably more — each pays the same share of what they earn, so the flat costs the same effort for both. Add the two net incomes together; each person’s percentage is their income divided by the total. Whichever you choose, choose it once and write it down.
The first big purchases: two questions, not one
A sofa is not rent. It does not disappear at the end of the month, and if the flat or the relationship ends, somebody takes it with them. So each shared purchase above a threshold you agree on — say €150 — gets two decisions at checkout.
How the cost is split can follow your rent rule or not. Plenty of couples who split rent 40/60 still split furniture 50/50 because they want to own it equally — a coherent choice, as long as it is a choice.
Who would keep it is the question nobody wants to ask and everyone is relieved to have answered. It is a conversation about things, not a contract, and it takes ten seconds per item: “this one’s ours,” “this one’s yours because it goes with your desk.” Note the answer next to the expense. If one of you already owns most of the furniture, their things stay theirs; only what you buy from now on needs the two questions.
The first-month cash-flow problem
The deposit, the first rent and the furniture all fall in the same three weeks, and they rarely fall evenly: one person transfers the deposit because their account was open that morning, the other buys the sofa because the shop took their card. Neither amount matches what each of you owes under your rule — and it does not need to. What you keep is a running total of who has paid what, so that at the end of the month one transfer puts you back on your rule.
A worked example
Nora takes home €2,400 a month, Sam €3,600. Together that is €6,000, so a proportional rule gives Nora 40 percent and Sam 60 percent. They agree on proportional for running costs and equal for furniture, because they want to own what they buy together equally. Their first month:
| Expense | Amount | Paid by | Rule | Nora’s share | Sam’s share |
|---|---|---|---|---|---|
| Rent | €1,500 | Sam | 40/60 | €600 | €900 |
| Bills (electricity, internet) | €200 | Sam | 40/60 | €80 | €120 |
| Sofa | €900 | Nora | 50/50 | €450 | €450 |
| Total | €2,600 | €1,130 | €1,470 |
Nora’s share of the month is €1,130 and she paid €900, so she is €230 behind. Sam’s share is €1,470 and he paid €1,700, so he is €230 ahead. The two numbers match, as they must: one transfer of €230 from Nora to Sam and the month is square. Nobody paid “their 40 percent” of the rent on the day and nobody split the sofa at the till; each paid whatever was practical, and the record did the rest.
Write it down before it is awkward
Agree all of this before the first big purchase, while it is still a planning conversation rather than one about a specific purchase one of you made. Three lines are enough:
- Running costs are split [equal / 40-60] — and the rule for when a salary changes.
- Shared purchases over [amount] are split [how] and we decide who keeps each one when we buy it.
- We settle up [monthly], after rent.
That is not a budget or a contract. It is the thing you point to instead of arguing.
Where Donget comes in
A group for the two of you is all this needs. Rent and bills go in as expenses with Paid by set to whoever’s card they hit, split by Percentage at 40/60; the sofa goes in as Equal. The Balances tab then shows the same figures as the table above, live for both of you, and Settle up proposes the one transfer that clears them. Recording Nora’s €230 as a Transfer brings both balances back to zero. The five ways to split an expense explains when Amount or Multiplier fits better than Percentage.
When it is not a couple at all
The same three buckets work for moving in with a friend or a sibling; you will just want equal rather than proportional, and care more about who owns what. How to split rent and bills with roommates covers the setup, and how to split utility bills the months when usage is not equal.
Frequently asked questions
Should we split rent 50/50 or by income when we move in together?
Either works if you both chose it. Equal when incomes are close; proportional when one of you earns noticeably more. Pick one, write it down, and revisit it when a salary changes.
Who pays for furniture when moving in together?
Decide two things per item before buying: how the cost is split and who would keep it if you ever parted ways. Many couples split big shared items equally and agree they are jointly owned; personal items stay personal.
What if one of us already owns most of the furniture?
Then it stays theirs, and only what you buy together from now on needs a split. If the other partner wants to contribute, an agreed one-off amount is simpler than trying to value a used sofa.
How do we handle the deposit and first month’s rent?
Split them on the same rule as rent, and record who actually transferred the money, because it is usually one person. If the deposit is refunded later, the refund goes back on the same split.
Do we need a joint account to split expenses?
No. Some couples open one for shared bills, some keep everything separate, and most still have costs that land on one person’s card either way. A shared record of who paid what works with or without one.
How often should we settle up?
Once a month, after rent and the main bills have gone out. Balances stay small, nobody is fronting large sums for long, and the conversation stays a two-minute routine.
The bottom line
Moving in together does not need a financial plan. It needs three buckets, one rule per bucket, a ten-second answer to “whose is it?” for each big purchase, and a shared record that turns a messy first month into one transfer. Agree it before the sofa arrives and you will never have the conversation about the sofa.
Download Donget free and set up a group for the two of you before the first rent goes out, so the first month ends in one transfer instead of a guess.
