The group says that 499,149 have already been started and expects 523,410 businesses to be founded by the end of year. 484,224 businesses were started in 2012 and to 440,600 in 2011.
Figures from its Startup Tracker show that 1,936 businesses were founded today alone.
Emma Jones, co-founder of StartUp Britain, said:These figures come directly from Companies House and show were on target to hit half-a-million new registered businesses for the first time.
“Weve been looking at these figures for three years since the campaign began and it’s clear the UKs start-up community is fit and healthy and shows no sign of abating.
Update: New figures confirm that the half-a-million mark has been broken, with 502,068 businesses started so far.