Part III: CFO Insight into the Problems with the NAHB Chart of Accounts Income Statement

(published on EFA® every year since 2012;  updated, incorporated, and republished here, as the third in a five-part series)

In the preceding post, we reported on an SAI survey of CFOs regarding the format and the utilization of their company’s particular Income Statement in relation to the NAHB Chart of Accounts Income Statement.

Their responses were hardly a ringing endorsement and picture of industry conformity.

We noted that the NAHB Income Statement was acceptable as a traditional, GAAP-compliant, externally-focused, functionally-oriented classification of costs, but the effect of its functional cost allocation was to indiscriminately blend costs that are either variable or non-variable, in terms of how they behave in relationship to changes in Revenue volume.

We said that this practice obscured cost behavior, preventing the use of important management accounting tools.  In order to use Cost-Volume-Profit (CVP) – which includes breakeven analysis – we further noted that you must have a Contribution Income Statement;  in order to have a Contribution Income Statement, you must use variable costing.

But, don’t take our word for it.

As part of the survey, we asked CFOs for more than answers to survey questions;  we asked for insight related to the structure of the NAHB Income Statement (i.e., line item accounts in series 3000-9000), as it relates to cost allocation (variable v. absorption) and management tools (breakeven, CVP, etc.).

This was from one of the CFOs, who is also a CPA:

“Homebuilding is often compared to manufacturing, but there are differences that need to be taken into account when developing an accurate costing method for management decision-making.

“In the manufacturing world, variable/direct costing allocates all costs directly associated with an activity, including variable manufacturing overhead, to inventory and cost of goods sold and treats fixed manufacturing overhead as an operating expense along with selling, general and administrative expenses.  Absorption costing allocates all costs directly associated with an activity and all manufacturing overhead (variable and fixed) to inventory and cost of goods sold and treats selling, general and administrative expenses as an operating expense.  Both approaches to costing have their drawbacks when applied to homebuilding.

“While absorption costing is necessary for GAAP basis external reporting, its usefulness in providing management information in making pricing decisions is limited, because it allocates fixed manufacturing overhead to inventory and cost of goods sold (costs that should not be considered when making a pricing decision), and does not allocate other variable costs such as selling expense, financing costs.  Also, variable/direct costing is limited in its ability to provide useful pricing information to management, as it only allocates variable overhead to inventory and does not allocate other variable costs.

“A costing system that allocates all variable expenses to an activity would provide management with the most accurate information for making the proper pricing decision.”

He continued:

“The NAHB Chart of Accounts is designed for historical financial reporting.  It is not a managerial accounting tool.  NAHB would do its members a great service by developing guidance on cost and managerial accounting.

“Most manufacturers have two sets of accountants and two sets of statements – financial accountants and financial statements for historical financial reporting, and cost/managerial accountants and financial statements designed for internal management and individual pricing decisions.

“In my roles as both a CFO and a President of a homebuilding company, I am intimately familiar with both the strengths and weaknesses of the NAHB Chart of Accounts.  It was a great tool for benchmarking our performance with other builders and to industry standards.  It was interesting to benchmark our company, but the statements produced utilizing the NAHB Chart of Accounts were of no use when it came to making pricing decisions.

“In order to make informed pricing decisions, I created my own operating statements by community that allocated all variable costs that could be specifically identified with the individual unit that generated them and removed all fixed costs.  In an environment of declining sales prices, rising costs, and a market that required substantial sales incentives, these operating statements were not only helpful, they were the key to our company’s survival.”

Next:  Part IV:  Academic insight into the problems with the NAHB Chart of Accounts Income Statement


(variable costing and the Contribution Income Statement format are addressed at every Pipeline workshop™;  learn more here: or