Since Gov. Martin O'Malley began announcing his tax plan in September, there have been competing figures over how much closing the state's $1.5 billion deficit will cost an average Marylander.

Most analyses then and since have only focused on select items, such as the sales, income and titling tax hikes, without taking into account every action of the General Assembly during November's special session.

Del. Steve Schuh, R-Gibson Island, sought to correct that by figuring out how the total package will affect an average household making $64,300 a year. The methodology was checked by both the state's non-partisan Department of...