It’s not just paying the pastor, the staff, and the utility bills: Most churches also have some sort of outreach program for helping their communities. My church, for instance, has meals for the hungry, a space for AA meetings, GED classes, and computer classes, as well as less formal arrangements like folks coming to he door and asking for help with anything from a bus pass to a month’s rent.
Bake sales per se might not be a big thing (though they are still a thing), but there are a number of other fundraisers churches use. At my church, we have:
St. Patrick’s Day: There’s a big jam-packed mass in the church (one of the largest in the city), then folks go downstairs to the hall for an all-day party, where they pay for food and drinks (mostly donated by a local brewery, owned by one of our parishioners).
Fish fries: Every Friday in Lent, we buy a bunch of ingredients for about two bucks a plate, add volunteer labor, and sell it for eight bucks a plate. Lots of folks come eat, not just parishioners.
Rummage sale: Folks donate old clothes, household items, toys, etc., and then we set it all up in the basement hall and sell it for anywhere from 25 cents (for a small toy) to maybe $50 (for a large piece of furniture). This also doubles as a form of outreach, since members of the community can get usable items for cheap.
Raffle tickets: Folks buy tickets for maybe $20 each, and one lucky winner ends up winning a trip to Ireland.
Rental: There’s a cell phone tower on the property, and the phone company pays us something like a thousand bucks a month for it. Not one of our biggest fundraisers, but it’s non-negligible.
A steak roast every year: The steaks are of course overpriced, and there are also opportunities at the event to buy the raffle tickets or otherwise make donations.
We also do get help from other parishes in the diocese, but that’s mostly just directed to the outreach programs: Churches in rich suburbs, where there’s more donation money and less need, are paired up with churches in the inner city, so they end up helping our poor. We’re still expected to stay on top of our own non-outreach expenses, though.
And yes, among Catholics, the diocese usually does own the real estate, but the rest of the finances are handled at the individual parish level.