As mayor of New York City, Bill de Blasio earns $258,750 a year, or $21,562.50 a month. For May 2019, that works out to $3,080 an hour.

That’s because he spent just seven hours at City Hall that month — not even a full working day — according to records reviewed by The Post’s Nolan Hicks.

This was the month he launched his bid for the Democratic presidential nomination. And he’s been campaigning (and fundraising) vigorously ever since, so it’s all too likely that the records for June, July and August will show a similar work ethic.

And the perks of the job also include living rent-free at Gracie Mansion. Nice “work,” if you can get it.

While everyday New Yorkers work 40-hour (or more) weeks to scrape by, the mayor is living large for doing very little. (Collecting stuffed pigs and playing Skee-Ball in Iowa really, truly doesn’t count.)

Yes, he does some work from home (whenever he chooses) and even phones from the road occasionally. In case of a blackout or other civic crisis, he’ll rush back to town within a day or so, with just a stop or two on the way to engage the national media.

Still, it’s hard to do your job when you’re never there. Those seven hours consisted of just six trips to the office, for two meetings, four events and five phone calls. And one of the calls was his weekly appearance on WNYC radio.

The 11 appointments de Blasio deigned to make were a fraction of the 50 listed on his City Hall calendar for the month. Citywide, he had a total of 152 events scheduled.

“If he’s trying to show New Yorkers that he’s over doing the job, he’s doing a good job of it,” one ex-aide told The Post. As they say in New Hampshire: A-yup.

Heck, at this point, it’s a safe bet that de Blasio is spending less time at City Hall than he is at his Brooklyn gym.