Housemate Bill Split Calculator
Work out exactly who owes what — split rent, electricity, internet and any other bill equally or by custom percentage. Free, instant, nothing saved or sent anywhere.
How to Use This Calculator
Add each person sharing the bills, then list out your bills — rent, electricity, gas, internet, water, whatever applies to your household. Each bill can be split equally between everyone, or by a custom percentage if it makes more sense (for example, a bigger room paying a larger rent share, or one person using more of the internet for work).
The totals update instantly as you type. Nothing you enter is saved, stored, or sent anywhere — it all happens in your browser.
Equal Split vs. Custom Split — Which Should You Use?
- Equal split works well for bills everyone benefits from the same amount — internet, streaming, general household supplies
- Custom split makes sense when usage or value genuinely differs — a bigger room paying more rent, or someone who works from home covering more of the electricity bill
- Whichever you choose, the fairest approach is agreeing on it upfront, before the first bill actually arrives
Want the full picture on why writing the split down matters, not just calculating it? Read splitting bills fairly with flatmates.
Put the Split in Writing
A calculator settles the numbers — a housemate agreement makes sure everyone's actually agreed to them. Create one in minutes, from $3.99.
Create a Housemate Agreement →Frequently Asked Questions
Can I split rent by room size instead of evenly?
Yes — set the rent bill to "Custom %" and enter each person's share. A bigger room or one with its own ensuite commonly gets 15–25% more than an equal split, though it's ultimately whatever your household agrees is fair.
Is this specific to Australia?
The calculator itself works for any currency or country — it's just arithmetic. It's built by an Australian legal-agreement platform, so the surrounding guides and terminology (housemate, flatmate, bond) are written for an Australian audience.
Does it save or send my data anywhere?
No. Everything runs in your browser using JavaScript — nothing you enter is transmitted, stored, or seen by SignedSorted.