This document summarizes the Hawaiian Electric Companies' annual Revenue Balancing Account (RBA) rate adjustment filings from 2012 to 2014. It shows estimates of incremental revenue adjustments for rate base, depreciation and amortization, operations and maintenance costs, and earnings sharing mechanisms. The total estimated RBA revenue adjustments and resulting bill impacts for typical residential customers are provided for each island and year. Footnotes explain that the estimates are preliminary and confidential, the basis for prior year amounts, that the annual RBA rate adjustment replaces the prior year's rate, and how bill impacts are calculated.