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After more than a decade of work by countless block producers and allied industry leaders, the Concrete Masonry Checkoff (CMC) is happening. On April 1, 2023, assessments will officially begin, paving the way for game-changing programs designed to win back lost market share and drive new demand for block.

Late Payment Policy

The Concrete Masonry Checkoff Board (CMCB) will adhere to the following process to collect unpaid assessments from producers in a timely and fair manner. Penalties and fees set forth in this policy are in addition to the following discretionary actions available to the Secretary of the Department of Commerce.

Ask a Question

As a block manufacturer, you may have a specific technical question about assessed products or have a unique accounting scenario that's not addressed in our Assessment Guide's Frequently Asked Questions.

Straight Facts

This page outlines five straight facts about paying the assessment, documenting when a sale is made, and questions about building the assessment into your price or reflecting it as a line-item fee.


As a concrete masonry unit manufacturer, you'll soon be expected to submit reports on the number of concrete masonry units you've sold each quarter.

CMU Defined

The Checkoff utilizes four basic criteria to determine what constitutes a concrete masonry unit (CMU) covered by the reporting and assessment requirement.


Together, there are four attributes that determine if a concrete masonry unit is INCLUDED in assessments.


Not every type of unit made on a block machine or cast in other manners are part of the checkoff. This section shows examples of EXCLUDED products.

Governing Definitions

Our program operates under a series of very precise definitions spelled out in the approved Order. They are the basis for our guidelines and are detailed on this page.


This page details specific technical questions we have received from block manufacturers across the country and will be updated as more come in.