Roommate Uses My Printer Without Asking? Fix This (2026)

Your roommate uses your printer without asking and burns through your ink. Here's the exact conversation, split, and setup that ends it for good.

You bought a printer for your last-minute résumés and tax forms. Now your roommate is running 40-page group project PDFs through it every Sunday night, and you’re the one buying $60 ink cartridges every three weeks.

If your roommate uses your printer without asking, the fix isn’t hiding the printer — it’s making the cost visible. Once they can see what a page actually costs you, one of two things happens: they stop, or they start paying. Both work.

How much does printer ink actually cost per page?

Roommates don’t get it because printer ink is priced insanely. A standard black cartridge runs $25–40 and prints roughly 200–400 pages. Color is worse. So every page they print is costing you 8–20 cents in ink alone, before paper.

Do the math out loud once:

“That 60-page reading you just printed? That was about $8 in ink.”

Nine times out of ten, they had no idea. Printer ink lives in that weird zone where everyone assumes it’s basically free because the printer itself only cost $80. Show them the receipt from the last cartridge and the number of pages it printed. It stops being abstract.

How do you bring it up without sounding petty?

Skip the passive-aggressive “hey, did you print something?” text. Just be direct and low-stakes:

“Hey — I noticed you’ve been using the printer a lot, which is totally fine. But the ink is getting killed way faster than when it was just me. Can we figure out a fair way to split the cost, or you grab the next cartridge?”

You’re not accusing them of anything. You’re describing what happened and proposing a solution. Most reasonable roommates will say “oh yeah, that’s fair, I’ll buy the next one.” If they don’t, you have a bigger roommate problem than the printer.

If it’s a text, keep it one paragraph. Long messages read as fights. This guide on texting your roommate about a problem has the format.

What’s the fair way to split printer costs?

A few options depending on how much they actually use it:

Occasional use (a few pages a week): Just have them chip in $10 next time you buy a cartridge. Not worth tracking beyond that.
Regular use (weekly, batches of pages): Split ink and paper costs 50/50 going forward.
Heavy use (they’re basically running a business): They buy their own cartridges, or you charge per page (5–15 cents is fair).

Whatever you land on, log it somewhere both of you can see. A shared expense tracker works better than a Venmo request every month because it removes the “wait, when did I pay for that?” arguments.

What if they keep doing it anyway?

You’ve had the conversation, they said “yeah, my bad,” and two weeks later you find them printing another 80 pages. Time for physical changes:

Unplug it when you’re not using it. Simple friction. If they have to plug it in and turn it on, they’ll be aware they’re using it.
Move it into your bedroom. Same friction, more effective. Now they have to ask.
Password-protect it. Most modern printers let you set a PIN through their app. They can’t send jobs from their laptop without your code.
Stop replacing the ink. Sounds petty, but it works. Once it’s out, they’ll notice fast.

If none of that works, you’re not dealing with a printer problem anymore. You’re dealing with a roommate who ignores agreements, which is a much bigger issue. Here’s how to handle a roommate who won’t respect boundaries.

Does this go for other personal stuff too?

Yes. Printer, blender, gaming console, coffee grinder — same principle. If they’re using it more than occasionally, either they pay in or they don’t use it. Silence is how one person ends up subsidizing everyone else’s convenience.

The setup you want long-term: a short list of “shared with everyone, we all pitch in” items and a short list of “this is mine, ask first.” Vague middle ground is what causes every fight.

How homies handles it

homies lets you log “personal items” separately from shared ones, so when a roommate wants to use your stuff, there’s a clean way to add them to the split — or not. Ink cartridges, replacement filters, printer paper — all trackable as recurring shared costs the moment you flip the switch. Bill splitting, chore tracking, and AI mediation for the moments where “I didn’t think it was a big deal” becomes a real problem.

rooming, minus the drama. Join the waitlist at joinhomies.app.