Thin Spread
The team estimates that Cornerstone currently serves 120,000 retail customers who qualify for wealth management services based on investable assets. The bank currently has a 4% penetration rate on wealth management products. Peers average 18% penetration with similar customer bases. If Cornerstone could reach 12% penetration and the average annual fee per wealth management client is $2,500, how much incremental annual fee revenue would that generate? What would full peer parity at 18% represent?
Case Exhibit
Rounding is standard practice in case interviews and almost always permitted with a quick ask.
Step 1: Calculate current wealth management clients
120,000 x 4% = 4,800 current wealth management clients
Step 2: Calculate clients at 12% penetration
120,000 x 12% = 14,400 clients. Incremental clients: 14,400 - 4,800 = 9,600 new clients
Step 3: Calculate incremental revenue at 12% penetration
9,600 x $2,500 = $24,000,000 in incremental annual fee revenue
Step 4: Calculate revenue at full peer parity of 18%
120,000 x 18% = 21,600 clients. Incremental vs. current: 21,600 - 4,800 = 16,800 new clients. 16,800 x $2,500 = $42,000,000 in incremental annual fee revenue
Rounded: ~$42M at full parity.
Step 5: Contextualize
Moving from 4% to 12% penetration, which is still well below peer average, generates $24M in new fee revenue annually. Full peer parity would represent $42M. For a bank with $18B in assets, this is a meaningful but achievable target. The more important question is what it costs to get there, whether through hiring wealth advisors, acquiring a wealth management firm, or partnering with an existing provider, and what timeline is realistic.
