The 'singles tax': People who live alone are paying thousands more on rent than their coupled-up counterparts

• It costs to be single: Americans living alone are facing a "singles tax" that costs thousands.
• A new Zillow analysis finds, on average, a single American living alone pays around $7,000 more a year in rent compared to their cohabitating peers.
• Meanwhile, couples save tens of thousands living together, further dividing economic prospects.

Ice cream isn't the only thing single Americans will spend more on this Valentine's Day — they're also likely paying thousands of dollars in a "singles tax" on housing.