hi mate...
Firstly, you must expect this at some time or another, it is part and parcel of being a "subby"
One the whole I tend to find that domestic customers usually pay ok. However builders, firms and plumbers are altogether different.
I recently did a job in Cheltenham, have 4 days away then another 5, completed second phase 3 weeks ago, still have not been paid. Was promised money last Thursday ( around £1500 ) Now I have been told it will be this Thursday coming. Also have done and completed a job for a builder - bathroom full
tile £1100 - will not get paid till after Christmas. Also 2 days tiling for the owner of a kitchen & bespoke furniture firm, at his own house ( I do all his tiling ) I completed this work a month ago and he promised to get back to me with a cheap cash price for some fitted wardrobes - still waiting & have not been paid for job either.
Got ripped off by a plumber a mont or so ago to the tune of nearly £500 and he took five weeks to pay me in drips and drabs.
You can put anything you want on your quote... i.e payment expected on completion ! If they are dishonourable they will still not pay it if they don't want to.
County Court is costly and time consuming - still not guaranteed to get anything. Maybe £10 a week for the next 10 years. If they default you have to re-apply at court.
Debt collectors are probably the only option - however make sure you have all your quotes in writing - go as far as sending them recorded delivery to new clients, as with your invoices.
Good luck