CUAC is not fully functional

We have received comment that the CUAC is not fully functional and are working to diagnose and correct the problem. We apologize for any inconvenience.

The CUAC is a tool designed to calculate project-specific utility allowances for low income housing projects. As a result of recommendations from the New Solar Homes Partnership's Affordable Housing Advisory Committee, California Energy Commission (CEC) staff working through its contractor, KEMA, began development of the CUAC in 2007.

The approved energy consumption software model can be used by qualified professionals approved by the California Tax Credit Allocation Committee (CTCAC) to calculate project specific utility allowances.

On January 25, 2009, the CTCAC approved the CUAC as the energy consumption model software for California for the 2009 tax credit funding cycle. The CUAC can be used by qualified professionals approved by the CTCAC to calculate project-specific utility allowances.

The CUAC is intended for affordable housing new construction and possibly substantial rehabilitation projects. Qualified buildings must include energy efficiency improvements and/or have onsite photovoltaic generation (PV) and be built to the  2005 California Building Energy Efficiency Standards or beyond. The CUAC is not appropriate for use with existing projects built to older energy efficiency standards (before 2005) or to projects that do not include energy efficiency or PV upgrades.

The CEC works with state and local housing authorities and funding agencies with regulatory authority over affordable housing projects. Agencies examine the potential use of the CUAC for determining project specific utility allowances that include energy efficiency or PV upgrades, including rules adopted by agencies to assure that the CUAC is used by qualified professionals.

If you have trouble viewing or accessing the document files,  please contact us.

California Utility Allowance Calculator (ZIP file, 3 MB)
Last Updated: August 17, 2020
The current version of the CUAC requires a Windows-based PC and Microsoft® Access®. A Macintosh-based version is not expected to be created.

Downloading Instructions: Create a folder in your C drive and name it "CUAC." Right-click the link above to download the file into the "CUAC" folder you've just created on your C drive. Unzip the files from the CUAC zip file.


Eugene Lee

(916) 653-2922