Philadelphia Nonprofits Nervous Over Tax Proposal

That language is seen by lawyers for nonprofit groups as including activities such as fund-raising dinners and concession sales at theaters.

The amendment also seems to define all rental income as taxable, regardless of whether it was related to the organization's mission or not.

Laura Weinbaum, director of public policy for Project HOME, said that was of particular concern to her organization, which provides affordable housing to people at risk of homelessness.