By any measure, there is a market in the U.S. for microenterprise services that programs offering credit and/or training are failing to serve. Among the more than 23 million microentrepreneurs operating today, an estimated 10 million are in markets that traditionally have experienced barriers to credit and other business development services. Add to that an untold number of entrepreneurs who are working in the informal economy, and that the microenterprise industry only reaches between 175,000 and 250,000 annually, and it is easy to see that the market for business development services is far from tapped out. Certainly, some of those entrepreneurs are accessing services outside the microenterprise industry, but it is also quite likely that many are simply going without.1For both the industry – and those funders interested in encouraging entrepreneurship and revitalizing local economies –this unserved segment represents a missed opportunity to foster business growth and job creation. While the number of individuals reached yearly by the microenterprise industry has grown over time, the gap remains wide. Why? And what can be done about it? This guide describes scale, some promising strategies for achieving it and how funders can help.