You don't have to lump your turnover with the franchisee royalties though. A franchise business is totally different to you as a window cleaning business.
Just thinking about things, say total royalties is £100,000. Minus 12% = £88,000. Say £5000 expenses (could be more as not sure what you spend marketing etc or if franchisee payment covers that) So thats £83,000. Deduct corporation tax at 20% leaves approx £66,000. Its still good money for not having to do the work, but its not a lot compared to the value of the work.
I'm still undecided which route to go down. Hopefully you've got a kettle in your office Vin as I might have to visit you for a chat one day
Theoretically I could run window cleaning and franchise business separately for VAT. However, having spoken to a VAT consultant, I found that what looks simple isn't. The businesses would have to be separate enough that they'd need different broadband accounts, PCs, even stationery (down to pens).
Then he mentioned case law that meant that if I were out cleaning and a franchisee in the next road needed a spare part, I'd need to drive home, swap to my car, drive out with a part that wasn't the one on my van, drive home, get into the van and return to my clean (there was a case involving a plumbing company that separated domestic from commercial that hinged on this very situation). If it's that hard to keep them separate, it's not worth it.
I'm not concerned about how little I appear to make given the amount being turned over by the franchisees. Not even slightly. Franchising works because the franchisees take the lion's share of the cash. You end up with capable, reliable people who want to do a good job for their business. I wouldn't swap that for a gold pig.
Kettle's always on.
Vin