What is the total market?
TAM is defined around the actual product or service category, customer and geography. Broad industry statistics are narrowed to the market being studied.
Commercial Intelligence
Build a market-size estimate you can trace back to real assumptions.
Market sizing is useful when the number can be explained. We define the customer, geography, use case and price, then build top-down and bottom-up estimates that show how the total was reached.
Questions this work can answer
Start with the decision you need to make.
What part of that market can we serve?
SAM narrows the total by geography, product fit, customer eligibility, channel, regulation or other practical limits.
What share is realistic to pursue first?
The reachable market is tied to sales capacity, distribution, price, customer acquisition and competitive conditions.
How sensitive is the answer to the assumptions?
We show what happens when customer counts, price, penetration or adoption assumptions change.
What we examine
The parts of the market that can change the decision.
Define the market before calculating it
A market-size number is only as useful as its boundary. We specify the customer, problem, product category, geography, buying unit and time period before selecting data.
This avoids a common mistake: citing the revenue of a broad industry as the TAM for a narrow service.
Use top-down and bottom-up methods where possible
Top-down sizing starts with authoritative industry or population data and narrows it. Bottom-up sizing starts with the number of possible customers, expected spend or transaction volume and builds upward.
When the methods produce very different answers, the gap becomes a research question that needs to be resolved.
Separate TAM, SAM and the first reachable market
TAM describes the full theoretical market under the stated definition. SAM reflects the part the offer can serve. The first reachable market reflects the customers the business can realistically pursue with its current channels and capacity.
Keeping these levels separate makes the estimate more useful for staffing, sales planning and market entry.
Show the assumptions next to the number
Customer counts, price, frequency, adoption and geography should be visible in the model. Decision-makers can then challenge an assumption without throwing away the whole analysis.
The report also notes data age, category mismatches and gaps that could materially change the estimate.
What you receive
Research built for a real business decision.
Market definition
A precise statement of customer, use case, geography, buying unit and period.
TAM and SAM model
Top-down and bottom-up calculations where the available data supports both methods.
Reachable-market scenario
A narrower view tied to current channels, capacity and realistic customer access.
Assumption and sensitivity table
The inputs that move the result most and the range created when they change.
Scope
How the engagement is sized
Market sizing can be a focused assignment for one service and geography or part of a larger opportunity, feasibility or market-entry study. Paid industry data may be proposed when public sources cannot answer a material question.
The proposal states the decision to answer, geography, comparison set, research depth, deliverables and review date before work begins.
Request a project scopePublic data and reference material
Useful sources for this type of research.
U.S. Census Bureau — Economic Census
Detailed U.S. industry and geographic data.
Visit reference →U.S. Census Bureau — County Business PatternsEstablishment, employment and payroll data by industry and geography.
Visit reference →U.S. Bureau of Economic AnalysisNational, regional and industry economic data.
Visit reference →Before you commission the work
Common questions about market sizing analysis.
What is the difference between TAM, SAM and SOM?
TAM is the full market under a defined scenario. SAM is the portion the offer can serve. SOM is commonly used for the share a business expects to capture; we prefer to show a reachable-market scenario with the assumptions behind it.
Can market size be estimated without expensive reports?
Often, yes. Census, BEA, BLS, regulatory, company and other public data can support strong estimates. Some specialized markets still require paid data or primary research.
How accurate is a market-size estimate?
It is an estimate tied to definitions and assumptions. The quality comes from making those inputs visible and testing the ones that matter most.
Can you size a local market?
Yes. Local sizing can use geographic customer counts, business density, spending, service radius and client operating data.
