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The 2016 update was funded by the David and Lucile Packard Foundation under the Urban Institute's Safety Net Initiative.

Numerous funders contributed to earlier work on NICC. The initial development was funded by the Annie E. Casey Foundation as part of the Low Income Working Families Project. Additional funding has been provided by Urban Institute institutional funds, the Department of Health and Human Services' Office of the Assistant Secretary for Planning and Evaluation (HHS/ASPE), and the John D. and Catherine T. MacArthur Foundation.

NICC's development built on an earlier tool, the Marriage Calculator, developed at the Urban Institute under contract with HHS Administration for Children and Families (ACF).

NICC's calculations are performed by an adapted version of the TRIM3 microsimulation model. The standard version of TRIM3 is funded and copyrighted by HHS/ASPE and developed and maintained by the Urban Institute.