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Whether you and your roommate have weekly dates to watch Euphoria with a bottle of wine or your main means of communication is through sticky notes, there’s good reason to be thankful for them. According to a new study by SmartAsset, they’re saving you a lot of money.

A lot a lot. If you live in a big city like San Francisco or New York, a roommate will save you more than $1,000 each month—that’s enough to take a weekend getaway or buy that new fancy TV that will make your Euphoria viewings even better. In such cities as Washington, D.C., San Diego, and Miami, the savings are also pretty substantial, ranging between $600 and $800.

Of course, this all depends on how many roommates you have and the size and exact location of your apartment. To figure out these numbers, SmartAsset looked at the average one-bedroom price compared with the average two-bedroom price split between two. So if you’re thrifty (and have a couple friends looking to save some cash), you could save even more. Now who wants to go in on an apartment?

See more budget tips: This Is Where NYC Ranks in a New List of Best (and Worst) Places to Rent Yes, Rental Furniture Is a Thing, But Should You Try It? This Is How Much You Can Make Flipping a House