The main source of income for the Montana tribe has historically come from the shared interest in the Pigeon Lake Reserve located 65 kilometers northwest of the Montana reserve. Since 1947, it has produced significant amounts of oil and gas and related by-products. Much of the income has been used to finance administration community programs and services. From this income the Tribe has invested in a number of ways including:
- Trendwood (a lumber supplier)
- Land acquisitions and related developments
- the Diamond Five Complex (rodeo, powwow, and activity Centre) h) a cattle ranch and feedlot facility
- farming operations j) on and off-reserve oil and gas developments
- Akamihk Gas Bar
- Agricultural and ranch leases of on and off-reserve lands