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Rent Split Calculator
Split monthly rent and utilities fairly between 2–8 roommates — equal shares, by room size, or by income ratio. Shows monthly and yearly cost per person.
Step By Step
How to Use This Calculator
6 steps
- Enter the total monthly rent — the amount on your tenancy agreement.
- Add utilities (electricity, gas, water) in the optional field if you split them the same way as rent.
- Set the number of roommates using the +/− buttons (2–8 people).
- Choose a split method: Equal (same share for all), By Room Size (larger room pays more), or By Income (higher earner pays more).
- For weighted methods, enter each person's name, then their room size (sqft) or monthly income.
- Read the results table — Monthly share, percentage, and Yearly cost per person.
Worked Example
Example: 3 roommates, by room size
Use this sample to sanity-check your inputs and understand what the final result represents.
- 1Monthly rent: ৳30,000 · Utilities: ৳3,000 · Total: ৳33,000
- 2Room A: 200 sqft · Room B: 150 sqft · Room C: 100 sqft · Total: 450 sqft
Final Result
Person A: ৳14,667 (44.4%) · Person B: ৳11,000 (33.3%) · Person C: ৳7,333 (22.2%)
Methodology
Split formulas & references
This section explains the calculation logic, assumptions, and source material used to make the result more trustworthy and easier to verify.
Equal: Each share = Total ÷ n. By room size: Share_i = Total × (Room_i ÷ ΣRooms). By income: Share_i = Total × (Income_i ÷ ΣIncomes). Proration: Daily rate = Monthly share ÷ 30. References: Bangladesh Tenancy Act 1928; Shelter UK flatmate agreement guidelines.
Helpful tips
- 1Agree on whether utilities are included before splitting — if billed separately, an equal utility split is usually fairest since usage is hard to track per person.
- 2Room-size split is fairer when bedrooms differ significantly — the person with the larger room pays proportionally more.
- 3Income-ratio split works best when flatmates have very different salaries — it keeps housing at a similar percentage of everyone's income.
- 4Put the agreed split in writing — even a WhatsApp message stating each person's amount and due date prevents disputes later.
- 5The main leaseholder is legally responsible for the full rent in Bangladesh — make sure flatmates transfer their share before the due date.
Frequently Asked Questions
What is the fairest way to split rent between roommates?+
It depends on the living arrangement. If all bedrooms are the same size and everyone shares equally, an equal split is fairest and simplest. If bedrooms differ in size, splitting by room area is more equitable — the person with the larger room pays more. If incomes differ greatly, splitting by income ratio ensures no one is disproportionately burdened. This calculator supports all three methods.
How is rent split by room size calculated?+
Each person's share = Total rent × (their room's sqft ÷ total of all rooms' sqft). Example: 3 rooms of 100, 150, and 200 sqft; total = 450 sqft. Person with 200 sqft pays 200÷450 = 44.4% of rent. This is the most common weighted method used by property managers and flatmate agreements.
Should utilities be included in the rent split?+
It depends on your rental agreement. If utilities are included in rent (a common arrangement in Dhaka), add them to the rent field and split together. If utilities are billed separately — electricity, gas, water — it is often fairer to split them equally, since usage is harder to attribute precisely. This calculator lets you add a utilities amount which is then split using the same method as rent.
How is rent split by income ratio calculated?+
Each person's share = Total rent × (their income ÷ sum of all incomes). Example: 3 people earning ৳30,000, ৳40,000, and ৳50,000; total income = ৳1,20,000. Person earning ৳50,000 pays 50,000÷1,20,000 = 41.7% of rent. This method is common among friends with widely different salaries and is considered equitable since housing consumes a similar percentage of each person's income.
Should I put the rent split in writing?+
Yes — even between friends. A simple written agreement (WhatsApp message, email, or signed note) stating each person's monthly amount prevents disputes when someone leaves early, forgets, or disagrees about what was agreed. Include: each person's monthly share, the due date, and who collects and pays the landlord. In Bangladesh, this is especially important because the main leaseholder is legally responsible to the landlord for the full rent.
What happens when one roommate leaves mid-month?+
The most common approach is to prorate: daily rate = monthly rent ÷ 30, multiplied by days occupied. If someone leaves on the 10th, they owe 10 ÷ 30 = 33.3% of their monthly share. The remaining roommates typically cover the balance or find a replacement. Agree on this policy before anyone moves in and include it in your written agreement.