Roommate Cost Splitting Calculator

Divide your rent, bills and other expenses between you and your roommates

Calculator

Monthly Housing Costs

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$
$
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Space, Amenities and Usage

Income

Income based splitting only factors in monthly housing costs. Space, Amenities and Usage preferences are not considered.

Roommate Configuration

Results

Total Monthly Expenses

$0.00
Splitting Method Comparison
RoommateEqualCustomIncome

How to use this calculator?

When using this calculator, each input helps you calculate the cost split between room or housemates.

  • Currency: Choose the desired currency.
  • Number of Roommates: Choose how many people are sharing the house or apartment.
  • Rent/Mortgage Payment: Enter the rent or mortgage cost for the household.
  • Utilities: Enter the cost of utilities.
  • Grocery Budget: Enter the grocery budget.
  • Other Expenses: Include any additional shared costs not covered under rent, utilities or groceries.

Splitting Factors

Fine-tune how expenses are divided:
  • Room Sizes: Toggle this ON to enter the size of the space occupied by a roommate.
  • Private Bathrooms: Enable this if a roommate has a private bathroom, which could slightly increase their share of housing costs.
  • Common Area Usage: Toggle this ON if roommates use shared spaces unevenly.
  • Special Circumstances: Toggle this ON to account for lifestyle differences like working from home, frequently traveling or other criteria.
Income-Based Splitting
  • Enable this if you want to calculate each roommate's share based on their monthly income.

Understanding Rent Affordability

How to use this calculator?

When using this calculator, each input helps you calculate the cost split between room or housemates.

  • Currency: Choose the desired currency.
  • Number of Roommates: Choose how many people are sharing the house or apartment.
  • Rent/Mortgage Payment: Enter the rent or mortgage cost for the household.
  • Utilities: Enter the cost of utilities.
  • Grocery Budget: Enter the grocery budget.
  • Other Expenses: Include any additional shared costs not covered under rent, utilities or groceries.

Splitting Factors

Fine-tune how expenses are divided:
  • Room Sizes: Toggle this ON to enter the size of the space occupied by a roommate.
  • Private Bathrooms: Enable this if a roommate has a private bathroom, which could slightly increase their share of housing costs.
  • Common Area Usage: Toggle this ON if roommates use shared spaces unevenly.
  • Special Circumstances: Toggle this ON to account for lifestyle differences like working from home, frequently traveling or other criteria.
Income-Based Splitting
  • Enable this if you want to calculate each roommate's share based on their monthly income.

How Splits are Calculated?

Equal Split

The total expenses including utilities, groceries as well as rent or mortgage payment are divided evenly among each qualified person in the house or apartment.

Custom Split

Each person is assigned a weight, which determines their share of the expenses.

The value of each person's weight is calculated from the following factors:

FactorContribution to Weight
Room sizeProportional to total room size
Private bathroomAdds 0.4
Common area usage(usage - 5)/10
Works from homeAdds 0.2
Travels frequentlySubtracts 0.2
Has a partnerAdds 0.15
Income-Based Split

Each person pays proportion of the household expenses based on their income.

Common Household Expense Splitting Methods

Equal Split

Example:

  • Three roommates sharing a $1,800 per month apartment would pay $600 each for rent.
  • A $150 utility bill would cost each person $50.
  • Each person would be responsible for contributing $650.

Pros:

  • Simple to calculate
  • Creates a sense of equality

Cons:

  • Doesn't account for different consumption habits, room sizes or incomes
Custom Split (Room/Usage-Based)

Example:

  • Three roommates sharing a $1,800 per month house.
  • Roommate A has an 800 sq ft living space and would pay $900.
  • Roommate B has a 480 sq ft space and would pay $540.
  • Roommate C has a 320 sq ft space and would contribute $360.

Pros:

  • Accounts for differences in private living space and habits

Cons:

  • Doesn't account for income differences
  • Can get complicated with unusual layouts and usage habits
Income-Based Split

Example:

  • Three roommates sharing a $1,800 per month apartment.
  • Roommate A earns $5,000 per month and pays $900.
  • Roommate B earns $3,000 per month and pays $540.
  • Roommate C earns $2,000 per month and pays $360.

Pros:

  • Ensures expenses are affordable for everyone based on individual earnings.

Cons:

  • May create resentment among roommates if benefits aren't equalized in other ways