Community's small irrigation investment gives impact on expansion of rice planted area and production. The study aims to assess impacts of small irrigation investment on rice planted area, production, and farmers' income enhancement, and it was carried out during period of March to December 2013 in rainfed lowland areas in West Java, Central Java, and West Nusa Tenggara Provinces. Development of small irrigation based on community investment (SIBCI) is analyzed using Net Present Value, Incremental Benefit / Cost Ratio and Financial Internal Rate of Return approaches. Small irrigation was useful for improving rice planted area, production, and farmers' income. Application of self-help water pumps was able to increase the area of wetland rice and cropping index. Small irrigation investments in both pump and gravity were financially feasible. The role of communities in small irrigation investment was significant despite financial limitation. Non-governmental funds allocated for pump irrigation network development were relatively small compared to that of gravity. Farmers' participation in gravitational irrigation construction was relatively low and not all farmers became the P3A members. Small irrigation development requires synergy of social, physical, human, and natural capitals. Community's participation in individual irrigation investment was relatively low contrary to that of managed by groups. The government need to collaborate with communities to manage water resources into community-based productive irrigation.