This varies from place to place.
Some fresh expressions of church are funded by the diocese, district, benefice, parish or circuit. Often where this is the case a sliding scale of support has been agreed (100% in year 1; 75% in year 2; 50% in year 3 and so on).
A few are self funding (through the giving of members) and one or two have developed clever commercial ways of helping with funding (such as the proceeds from a coffee shop, skate park, training course and so on).
Our eleventh Share booklet, Self-supporting ministry, explores ways of being self-supporting as a pioneer.
You can read about the funding of the Fresh Expressions core team on our partners and the organisation page.