Tenants late on rent, have yet to pay this month

[Pawel N.]

This should be Landlording 101, but ...

I've had this tenant for three years now. She owns a small business in the town and he works for a company that does work on roads - on and off. They have been late with rent a few times, but they've never missed a month.

Last month they were late and I charged them a late fee. They dropped off the check for the original amount because "they already wrote it out." I asked them to include it in this months rent.

This month, I have still not received rent. I keep getting updates that they will do it "today" which obviously hasn't happened. 

What's my next step? At what point does it go to small stakes court? I'm frustrated with getting the runaround this month and last month.