The original P2P lending platform has seen strong demand since launching its ISA last year.
Since the start of 2018, it adds, 60 per cent of new customer funding on the Zopa platform has been into its IFISA products.
“Reaching the £100m milestone shows that there’s a strong appetite amongst our investors for an IFISA product that sits in the sweet spot between lower return cash ISAs and potentially volatile stocks and shares ISAs.”
Zopa launched its IFISA to new customers in January 2018.
It says that in recognition of hitting the £100m milestone, it is offering its customers a cash-back. Between 24 April and 8 May, both new and existing customers can earn up to £200 cash-back on new money they invest with Zopa.