How do you split money after a breakup?

The short version

Stop adding to the shared pile of costs, agree a cutoff date in writing, then list everything shared since you were last square: what it cost, who paid it, and one net figure at the end. That is the whole method, and it works the same regardless of why the relationship ended.

On a real five-week ledger, that is six shared costs, rent, utilities, groceries, one takeout order and a streaming bill, totalling $3,339.33. Split evenly that is $1,669.67 and $1,669.66 each. One person paid far more of it than the other, so the person who paid less owes the other $1,400.67. Not an estimate: the exact figure the same rounding rule the app itself uses produces, worked through below.

Why this is not really about arithmetic

The arithmetic above took about ten minutes once the six line items were listed. What takes weeks is not the sum. It is that the two of you remember different things. One of you remembers covering rent twice because the other was short that month. The other remembers paying for every takeout order for weeks. Both of those things can be true at once, and neither is the full picture, because memory keeps the parts that fit the story you are telling yourself about what happened and quietly drops the rest.

That reorganizing is not a character flaw and it is not evidence that either of you is lying. It happens to nearly everyone going through the same thing, in both directions, and it happens more the longer you wait to write anything down. A ledger kept at the time is a fact both of you already agreed to, because you both saw the same receipt on the same day. A ledger reconstructed a month after one of you has moved out is two separate memories competing for the same number, and there is no arithmetic that resolves a disagreement about what actually happened.

This is also why the order below starts with stopping the spending and agreeing a cutoff date rather than with settling anything. Every day that passes without one adds another line item that has to be remembered correctly instead of simply read off a record.

What order to do it in

Four steps, in this order. Doing them out of sequence is the usual way this drags on for months.

• Stop the shared spending first. Nothing new gets added to a joint card or a shared kitty from today. This is the one thing worth doing before anything else, because every day it continues is another line item somebody has to remember correctly rather than read off a record.
• Agree a cutoff date, in writing. A message that says everything before a given date is shared and everything after is not is enough. Without it, one of you will draw the line at the conversation that ended things and the other will draw it at the day the second person actually moved out, and those two dates can be weeks apart.
• Settle the ledger. Everything shared between the last time you were square and the cutoff date, added up to one net figure. This is the ten-minute part, worked through below.
• Deal with the assets last. The lease, the deposit, the furniture, anything booked that has not happened yet. These take longer because they are decisions, not sums, and rushing them just to close the ledger faster is how people end up unhappy with an agreement they made too quickly.

A worked settle-up

Here is what step three looks like on a real example: two people, five weeks between deciding to separate and one of them moving out, still paying the same shared costs they always did. Whatever method the two of you used to split costs while you lived together, whichever of the five ways to split shared costs fairly it was, is the same method that closes the ledger out. Nothing about the maths changes, only the fact that the list now has an end date.

Six shared costs, and who paid each one:

Add up what each person paid: $3,070.33 from one, $269.00 from the other. Split the $3,339.33 total evenly and the fair share is $1,669.67 and $1,669.66, a cent apart because the total does not split evenly in two; that cent is never a judgment call, and where the extra cent in an uneven split goes explains the rule that decides it. The difference between what somebody paid and what they owed is the whole answer: one net payment of $1,400.67, and the ledger is closed.

Run your own numbers

The six rows below are the same ledger as the table above, and they start out matching it exactly. Change any amount, change who paid, or mark a row not shared if it should never have been on the list, and the net figure updates.

What a ledger cannot decide

A ledger settles what was already spent. It has nothing to say about a booking that has not happened yet, a lease with one name on it, or a couch neither of you wants to lose. These four come up often enough to cover directly, and two of them are genuinely a matter of what the two of you decide rather than what any calculator returns.

A joint booking that is not refundable

Money already spent on something that will not happen does not disappear because the trip is off. If $612.31 is gone regardless, splitting it the same way you split everything else is $306.16 and $306.15, a cent apart for the same reason as above, and still owed whether or not either of you would ever have used what was booked.

The harder version is a booking that is only partly gone, where some of it comes back once a date passes or a cancellation window closes. Wait for the actual refund before splitting anything. Splitting an estimate and then finding the real number was different is one more thing to revisit later, and the point of doing this properly once is to not have a later.

When only one of you would have gone if the relationship had not ended, an even split usually is not the fair one, and what to do when someone drops out of a trip you have already booked works through exactly that question on a real booking.

One of you is staying and taking over the lease

Staying in a shared home means the rent stops being split at the moment the other person’s name comes off it, whether that is a formal date on paperwork or an informal one you agree between yourselves. Before that date, it is still a shared cost in the ledger like anything else. After it, it is the remaining person’s rent alone, and carrying it forward in the ledger past that point overcounts it.

The rest of it, final bills prorated to the day, shared furniture, what happens to a deposit, is the same set of questions anybody moving out of a shared home has to answer, and closing the books when you move out goes through it in full.

A deposit paid entirely by one person

A deposit is not a shared cost the way rent is. It sat there the whole time, and whether it was ever meant to be a joint contribution or was just fronted by whoever had the cash when the lease was signed is a decision, not a calculation. Some couples treat it as joint from the day both names went on the lease. Others treat it as a loan that gets repaid once it comes back. Both are reasonable, and no ledger can tell you which one you actually agreed to.

What the numbers can do is show what either answer looks like. On a $1,400.00 deposit with a $63.75 cleaning deduction, a $1,336.25 refund arrives. Split it evenly and that is $668.13 and $668.12. Treat it as always having been one person’s money and it goes back to them whole, deduction and all. Decide which one applies before the refund lands rather than after: money already sitting in one account is much harder to move than money still in transit.

Shared items you bought together and cannot split

A couch cannot be halved. The usual answer is that whoever keeps it buys out the other person’s half of what it is worth now, not what it cost when it was new. On $915.37 of combined current value in the pieces one of you is keeping, a fair buyout is $457.69 and $457.68.

Getting to that $915.37 is the part worth agreeing carefully. Original receipts are a start, current resale value is more honest, and sentimental value is not a number either of you can put a price on for the other person. If you cannot agree on what something is worth, that is its own conversation, and no formula stands in for having it.

Common questions

Every figure above came from running Halvy’s own split engine on the worked examples, not from arithmetic done by hand: the ledger’s $3,339.33 splits to $1,669.67 and $1,669.66 exactly, the booking’s $612.31 to $306.16 and $306.15, and the deposit and shared-items figures the same way, each pair checked to sum back to the original total to the cent. None of this is legal advice: what either of you is entitled to under a lease, a cohabitation agreement or property law depends on where you live, and is worth checking with someone qualified to advise on it.