Property owners in Pasadena made $7.8 million in the last year from renting homes posted on Airbnb, but new regulations being considered by the Pasadena City Council on Monday could cut into those earnings, according to the company.

The regulations would cap rentals at 90 days per year if the host doesn’t stay on site, according to a staff report. Hosts would also be limited to renting out their primary residence, a definition that requires the host to live on site at least nine months out of the year.

Some accessory units are allowed for the rentals, but only if they were built prior to January 2017, the proposed regulations state. A host couldn’t rent more than one property in the city.

“Short-term rentals can benefit those who operate them, their visitors and also the cities that allow them by way of taxes and economic spinoffs,” David Reyes, director of Pasadena’s planning department, wrote in a staff report to the council. “However, left unregulated, the short-term rental market could have negative impacts on the neighborhoods where (short-term rentals) are located and restrict the city’s limited housing supply for long-term tenants.”

The regulations up for vote Monday night state that hosts would have to apply for a short-term rental permit and a business license to use services like Airbnb. They would also have to get written permission from their landlord for any subleases.

The rules would also cap rentals near the Rose Bowl to 5 percent of the homes, or roughly 126 units, to avoid over concentration.

The proposed regulations try to find a balance between allowing the phenomenon and maintaining “the character of Pasadena’s residential neighborhoods,” Reyes wrote.

According to Airbnb, a typical host in Pasadena makes about $10,000 a year by opening up their home to guests. More than 30,000 people used the service to stay in Pasadena last year.

The company is pushing for Pasadena to enter into a “voluntary tax collection agreement” that it estimates would have generated $768,000 in 2016 and $713,000 so far this year.

Limiting short-term rentals too much would only hurt the economy, company officials argued. The staff report is unclear how much money would be generated by permitting short-term rentals under the proposed rules, but Reyes wrote that whatever the amount is, it will shrink when the costs to manage and enforce the proposed regulations are factored in.

Pasadena’s City Council meets at 6:30 p.m. Monday at City Hall, 100 Garfield Ave.