If you are living with a roommate, chances are you are both going to talk about splitting the rent fairly. As splitting the rent can be somewhat of a hefty task, it will always involve matters related to how much money you have and the amount of space you have in your apartment. To avoid any financial issues right off the bat, here are the five ways to fairly split rent.

If roommates have the same amount of space, it can be quick and  straightforward to split rent. To get an accurate breakdown, measure the square footage of each bedroom, and divide by the total square footage of the apartment. You can get the percentage of space each room occupies. Take each percentage and apply it to the cost of the rent. It will break down the cost according to the percentage of total occupied.

What are the features of your room? Does it have a private bathroom? With any extra features, you can assign a cost to each amenity and tack it onto an evenly divided room price. Remember also that closet space, windows, balconies, etc. can also be considered extra perks.

Consider also your daily habits. Know how much water you use, how long you use your laptop, and if you always stay up late at night. It can help you determine  splitting the rent on a per person basis. If you rent a room for a single occupant, you can expect a specific usage of energy. But renting it out to two people, then you can expect an increase in your electricity bill. You can also anticipate more wear and tear and less storage space in common areas.

If a two-room apartment is rented to three people (with two sharing one place, the other occupies the room alone), rent can be divided equally between the sharing roommates. At the same time, each of the three housemates pays an equal sum for the common areas.

Splitting the rent by income is an option that’s typically best between friends or partners who want to live together harmoniously, which have significantly different incomes. Of course, how you set the various rental rates for each roommate with this method will be less intense than the purposes above and because it is based more on how much rent you can afford due to the amount of income.

Here’s an excellent budgeting rule to remember when renting an apartment. The amount you spend on the rent should not be more than 30% of your monthly income. When the lease is evenly divided, one roommate’s portion of the rent is above this percentage, while the other is far below it. So the roommate with a higher income might be comfortable paying more to allow other roommate’s rent to be below the 30% mark. The benefit for the roommate paying more is that they get to live with someone they enjoy being around.

If every roommate has the same amount of space and the same amenities—or doesn’t care if they don’t—it’ll come easy to split the rent fairly. If everyone pays the same amount, divide your rental rate evenly by the number of roommates, and you’re done.