How to Split Laundry Costs Fairly With Roommates

Laundry costs feel tiny until suddenly one roommate is paying for every detergent bottle and nobody remembers who used the last machine.

If you live with roommates, you probably know the situation: someone buys detergent “just this once,” someone else always has coins for the dryer, and somehow the person with the most black hoodies is doing laundry twice a week while everyone splits the cost evenly. It is not dramatic enough for a house meeting, but it is annoying enough to create that quiet “wait, is this fair?” feeling.

I used to think laundry costs were too small to bother tracking. But in a shared flat, small costs become weirdly emotional because they mix money, chores, and fairness. So I tried a simple system with my roommates that did not require a spreadsheet obsession or awkward debt collecting. Here is what worked.

First, Figure Out What You Are Actually Paying For

Before splitting anything, it helps to know what counts as “laundry costs.”

For us, it was:

• Washing machine payments
• Dryer payments
• Detergent
• Fabric softener, if someone uses it
• Stain remover or laundry bags, if shared
• Electricity or water, only if you have your own machine and want to include it

If you use machines in a laundromat or shared building laundry room, this is easy. You can just count the price per wash and dry. In my building, one wash was around €3 and drying was another €2, depending on the machine. That means one full laundry round could cost about €5 before detergent.

If you have a machine inside your apartment, it gets less obvious. You probably do not need to calculate every litre of water unless your flat really wants to. A good enough version is just sharing detergent and maybe adding a small monthly amount for machine use if electricity bills are a sensitive topic.

The “Equal Split” Method: Easy, But Not Always Fair

The simplest method is to split everything equally. If you buy detergent for €12 and there are four roommates, everyone pays €3.

This works if:

• Everyone does laundry about the same amount
• You share detergent and other supplies
• Nobody minds small differences
• Your household prefers simple over exact

Honestly, this is the least stressful option if your laundry habits are similar. It is also great for busy student flats where nobody wants to become the laundry accountant.

But there is one problem: laundry use is often not equal. One person might wash gym clothes every two days. Another might go home on weekends and barely use the machine. If the difference is big, equal splitting can feel unfair fast.

The “Pay Per Load” Method: More Fair, Still Simple

This is the method I liked most.

Every time someone does laundry, they add their wash to a shared note. At the end of the month, you split shared supplies based on how many loads each person did.

Example:

• Roommate A: 6 loads
• Roommate B: 4 loads
• Roommate C: 2 loads
• Total: 12 loads

If detergent cost €12 that month, each load “used” about €1 of detergent. So Roommate A pays €6, Roommate B pays €4, and Roommate C pays €2.

Is this perfectly scientific? No. Did it feel fair enough? Yes.

The trick is to keep it extremely easy. We used a shared phone note with three columns:

Date | Name | Wash/Dry
May 4 | Lina | Wash + dry
May 6 | Sam | Wash only
May 8 | Jo | Wash + dry

No one had to write an essay. Just enough to remember what happened.

What About Detergent?

Detergent is where things get surprisingly messy.

Some people use a tiny amount. Some people pour like they are trying to clean a football team’s entire kit. Some buy the cheap bottle. Others want sensitive-skin eco detergent that costs more.

The best solution I found is to agree on one shared detergent that everyone is okay with. Not the fanciest. Not the worst. Just good enough.

Then choose one of these:

• One person buys it and gets paid back
• You rotate who buys the next bottle
• You keep a small shared household fund for basics

The rotating method sounds fair, but people forget. The payback method worked better for us because one person could buy detergent when needed, then add it to the shared costs.

I also learned to take a photo of the receipt immediately. Not because I distrust my roommates, but because I personally forget numbers after five minutes.

Try This in 10 Minutes

If you want a quick fix without making it a whole project, try this:

1. Open a shared note or group chat.
2. Write down your current laundry costs: wash, dry, detergent.
3. Agree if you want equal split or pay per load.
4. Track laundry for two weeks only.
5. Check if the split feels fair enough.

Two weeks is nice because it is short. Nobody feels trapped in a system forever. You are just testing.

After two weeks, ask:

• Did anyone do way more laundry than expected?
• Did someone buy supplies and not get paid back?
• Was tracking annoying?
• Did the system prevent awkwardness?

If the answer is mostly yes, keep it. If not, simplify.

A Tiny Rule That Avoids Awkwardness

Set a minimum amount before asking for payment.

For example, “We only settle up when someone is owed more than €5.” This avoids sending tiny payment requests like €0.83 for detergent, which can feel more annoying than useful.

In our flat, this made everything calmer. Nobody had to pay someone back instantly for every little thing, but bigger costs did not disappear.

Use a Tool If Your Brain Refuses to Remember

I tried tracking small shared costs manually, and it worked until exam season. Then my brain simply deleted all household admin.

A budgeting app, shared note, or expense-splitting app can help. I also like using Monee for getting a clearer picture of where my money actually goes, because laundry is one of those sneaky categories that feels invisible until you track it.

But honestly, the best tool is the one your roommates will actually use. A messy shared note beats a perfect app nobody opens.

What I Wish I Knew Earlier

Fair does not always mean perfectly equal. Sometimes fair means simple. Sometimes it means paying based on use. Sometimes it means saying, “Hey, I think I’ve bought detergent three times in a row. Can we sort that?”

That sentence used to feel awkward to me. Now it feels normal. Shared living works better when money stuff is boring and clear, instead of silently building up in everyone’s head.

Laundry is not the biggest expense in student life, but it is a good place to practise fair roommate habits. Keep it simple, track just enough, and aim for a system that everyone can follow even on a tired Sunday evening.