Methods for Measuring TAM

There are four broad methods of measuring TAM. As a company, we are most prepared to use the Bottom-Up approach. For that reason, I only briefly explain the other three methods (for more information on the pros and cons of each method, see a few useful resources here):

This method estimates TAM by using industry reports and studies to calculate the total market size (for examples, see here and here). The total market size is then adjusted based on the target market segment and other relevant factors. For example, if the industry report estimates the total market size for smartphones to be $100 billion, and the target market is limited to the United States, the TAM would be adjusted based on the smartphone penetration rate in the United States.

Pros:

Relatively easy and quick to perform. Useful when industry reports and studies are available. Can provide a broad understanding of the market potential. Can help identify potential market opportunities beyond the company’s current target market by identifying the size of adjacent markets.

Cons:

Industry reports may not be up-to-date or relevant to the client’s specific situation. May not capture nuances or differences within the target market. For example, it may not provide estimated revenue by demographic information. Typically assumes a uniform market potential across all regions, or does not breakdown the market size by region.

This method estimates TAM by calculating the potential market size based on the number of potential customers and the average revenue per customer. For example, if a business is targeting the enterprise software market, the bottom-up approach would estimate TAM by multiplying the number of potential enterprise customers by the average revenue per customer.

Pros:

Typically provides a more accurate estimate of TAM. Helps to identify specific customer segments and their needs. Takes into account variations in revenue potential by customer segment. In other words, the interlocking quotas that are used to extrapolate the sample estimate to the population can also serve as segments to look at sales potential for certain demographics. Can help identify opportunities for market segmentation.

Cons:

Requires significant time and resources to gather data on potential customers and their buying behavior. Not based on actual sales / purchase data.

This method estimates TAM by calculating the value that customers place on the product or service. The value theory approach takes into account the benefits that the product or service provides to the customer, as well as the customer’s willingness to pay. For example, if a business is offering a new software that streamlines workflow, the value theory approach would estimate TAM by calculating the potential time and cost savings for the customer, and the willingness to pay for those savings. The willingness to pay would then be extrapolated for the current existing customers.

Pros:

Takes into account the unique value proposition of the product or service. Can provide a more accurate estimate of TAM if the value of a new product or feature is easy is to calculate and associate with a willingness to pay. Helps to identify the maximum price customers are willing to pay.

Cons:

Can be difficult to quantify the specific benefits provided by the product or service. Typically assumes that customers are willing to pay the maximum price for the product or service, which may not be the case. May not take into account variations in willingness to pay based on customer segment or region.

This approach typically starts with an estimation of the total market size or a specific market segment’s size, which can be obtained from industry reports, market research, or other sources. Then, a company’s market share is calculated as a percentage of the total market or segment size. Finally, the TAM can be estimated by dividing the company’s revenue by its market share percentage. For example, if a company has a revenue of $50 million in the smartphone industry, and its market share is 5%, the TAM for the smartphone industry would be estimated as follows: TAM = (Revenue / Market share percentage) → TAM = ($50,000,000 / 5%) →TAM = $1 billion

Pros:

Provides a more accurate estimate of TAM based on the company’s current market share. Can help identify the size of the opportunity for the company to increase its market share.

Cons:

Assumes that the company’s market share will remain constant, which may not be the case. Doesn’t take into account potential changes in the market landscape. May not capture potential market opportunities beyond the company’s current market share.

At Gradient, we are best suited to offer the Bottom-up approach, and possibly combine it with the Value theory approach. In other words, as a survey data-based company, we will rely on the Bottom-up approach to determine the number of potential customers (e.g., those willing to buy soundproof headphones) in a representative pool of the larger market (e.g., U.S.). If the client is trying to size the market for a particular product, we can also employ the Value theory approach by conducting a willingness-to-pay analysis. By extrapolating the number of potential customers by their willingness-to-pay, we can estimate the TAM and SAM.