Coverage Gap
PwC estimates the small business insurance AI underwriting market has 180 potential insurer customers. Sentinel believes it can realistically capture 15% market share within three years. The average contract value for an AI underwriting platform in this segment is $400,000 in annual recurring revenue per insurer. Sentinel's cost to acquire each customer is estimated at $120,000 and annual cost to serve each customer is $80,000. What is the three-year net revenue and is the business profitable by year three on a contribution basis?
Case Exhibit
Rounding is standard practice in case interviews and almost always permitted with a quick ask.
Step 1: Calculate total customers at 15% market share
180 x 15% = 27 insurer customers.
Step 2: Calculate total ARR at full penetration
27 x $400,000 = $10,800,000 in annual recurring revenue.
Rounded: approximately $10.8M ARR.
Step 3: Calculate total customer acquisition cost
27 x $120,000 = $3,240,000 in total acquisition cost over three years.
Rounded: approximately $3.2M.
Step 4: Calculate annual cost to serve at full penetration
27 x $80,000 = $2,160,000 per year.
Rounded: approximately $2.2M per year.
Step 5: Calculate year three contribution
Year three ARR: $10,800,000.
Year three cost to serve: $2,160,000.
Year three gross contribution: $10,800,000 - $2,160,000 = $8,640,000.
Excluding the acquisition costs already spent: contribution margin is approximately 80%.
Step 6: Contextualize
The unit economics are attractive. An 80% contribution margin at scale is strong for a SaaS business, and the $3.2M in total acquisition cost is modest relative to the $10.8M ARR base it generates. However, $10.8M in ARR is relatively small for a venture-backed company with Sentinel's likely cost structure and investor return expectations. The 15% market share assumption is the key variable to pressure-test. If Sentinel can push toward 25 to 30% share, the revenue base becomes much more meaningful.
