First, I would look to change your operator, unless you have a trade skill of 5. There are a few that offer their services free of charge, and this means you get more money.
Second, when was it finished construction/opened to all? FI runs only on the first day of the month, so if it was finished/opend after the last run, you have to wait for the next month.
Third, since you are operator, were you active at the last FI run? Money is only generated with an active operator.
Fourth, and probably should of been first, what is the facility type? Not all facilities generate income, so I'd check the rules pages to see if it has the yellow FI icon listed. If it is also a faction specific facility (like the temple) then that faction needs to manage it for it to make any income.