Executive Strategy & Market Sizing Lab

TAM SAM SOM Market Sizing Lab

Calculate TAM, SAM, and SOM market size, bottom-up account volumes, and target revenue penetration.

Bottom-Up Model Top-Down Sanity Check Strategy Theory FAQ

Industry Presets

Load calibrated market sizing models.

Step 1: Bottom-Up Account Volumes & Pricing

Bottom-Up TAM SAM SOM Configuration

1. Bottom-Up Market Dynamics

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Bottom-up is the gold standard required by venture capital investors and board members.

2. Top-Down Macro Sanity Check

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3. Go-to-Market Sales Rep Quota Capacity

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Checks whether target SOM revenue requires a realistic number of quota-bearing sales reps.
TAM (Total Market)
$2.16 B
100% potential market demand
SAM (Serviceable Market)
$972.0 M
54,000 qualified ICP accounts
SOM (Obtainable Target)
$43.7 M
2,430 Target Accounts (4.5% SAM)
Sales Reps Needed
59 Sales Quota Heads
SAM: 45.0% TAM | SOM: 4.5% SAM

Corporate Strategy & Venture Economics

Mastering TAM, SAM, and SOM Sizing

Market sizing defines the revenue ceiling and growth trajectory for new business units, startup pitch decks, and corporate expansion plans.

  • Total Addressable Market (TAM): The total annual dollar value available if your business captured 100% of all potential global customers.
  • Serviceable Addressable Market (SAM): The qualified subset that matches your Ideal Customer Profile (ICP), geography, regulatory certifications, and price tier.
  • Serviceable Obtainable Market (SOM): The realistic slice of SAM your sales channels and marketing budget can capture in the next 1 to 3 years.

Evaluate unit economics in the Unit Economics Lab.

Market Sizing Formulas

Essential market sizing formulas

Bottom-Up TAM ($) = Total Potential Accounts × ACV

Bottom-Up SAM ($) = (Total Accounts × ICP Segment %) × ACV

Bottom-Up SOM ($) = SAM ($) × Target Obtainable Share %

Top-Down SAM ($) = Global Industry Value × Geo % × Category %

Quota Reps Needed = Target SOM Revenue ÷ Annual Rep Quota

Benchmark sales cycle velocity in the Sales Pipeline Lab.

FAQ

TAM SAM SOM market sizing questions

What is the difference between TAM, SAM, and SOM?

TAM (Total Addressable Market) is total theoretical market demand if you had 100% share. SAM (Serviceable Addressable Market) is the subset targeted by your products, geography, and qualification. SOM (Serviceable Obtainable Market) is the realistic near-term revenue capture target (typically 2% to 10% of SAM).

Why do venture investors prefer bottom-up over top-down market sizing?

Top-down sizing ('if we capture 1% of a $50B market') ignores sales economics and execution reality. Bottom-up sizing (Total Qualified Accounts × Annual Contract Value) proves pricing, account volumes, and go-to-market feasibility.

How do you calculate bottom-up SAM and SOM?

SAM = (Total Accounts × ICP Qualified Segment %) × ACV. SOM = SAM × Target Obtainable Market Share % (or SOM Accounts × ACV).

How does sales rep capacity sanity-check a SOM projection?

Required Reps = SOM Target Revenue ÷ Annual Rep Quota. If capturing your SOM requires hiring 50 reps in Year 1 on a seed budget, the market penetration target is unrealistic and must be revised.

Can I export TAM SAM SOM pitch deck models to CSV?

Yes. You can export complete bottom-up account counts, contract values, TAM/SAM/SOM totals, top-down benchmarks, and sales rep capacity as a UTF-8 CSV spreadsheet with formula injection defense.

Is this tool certified investment or securities advice?

No. This tool provides educational market sizing simulations for business strategy analysis without certified financial, venture investment, or securities offering warranties.

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