Case 01
Paying for a less concentrated deposit base
At the end of 2022, our twenty largest depositor groups represented 38% of customer deposits. The balances were associated with valuable commercial relationships, and many had been with Fennervale Commercial Bank for years. Treasury considered the concentration manageable under its existing scenarios. I was less comfortable with the way those scenarios separated accounts controlled by the same owners. The issue was not that we expected those customers to leave. It was that our confidence depended on knowing more about their behaviour than our records actually demonstrated.
I asked for a joint review of account ownership, withdrawal authority and the commercial events that could cause balances to move. Several relationship managers worried that the exercise would be interpreted as distrust. The finance team also showed that replacing some deposits with a broader mix would raise annual funding expense. We estimated an additional C$8.6 million at the planned balance level. I took that cost to the board with the concentration analysis instead of presenting diversification as a free improvement.
We introduced group-level monitoring, stopped matching every exceptional rate request and invested in transaction relationships with smaller commercial customers. Existing large depositors retained named contacts and clear explanations of our pricing decisions. The transition was deliberately gradual; a sudden rejection of balances would have created the very funding pressure we wanted to avoid.
By June 2026, the largest twenty groups represented 24% of C$13.2 billion in customer deposits. Some of the reduction came from overall deposit growth, and I distinguish that from deliberate balance replacement. The annualised funding cost increase was C$7.9 million against the original estimate. The bank gained a clearer view of connected accounts and more room to manage individual withdrawals. I would start customer explanations earlier if repeating the programme. Our internal analysis had advanced faster than the language relationship managers could use with confidence.