BankUnited signals 5%-6% 2026 net interest income growth while lifting NIDDA outlook to 12%-13% (NYSE:BKU)

BankUnited (BKU) raised its 2026 non-interest-bearing deposit ratio (NIDDA) guidance to 12%-13%, signaling improved deposit composition and a structural shift toward lower-cost funding. This metric reflects management's confidence in deposit retention and pricing power despite competitive pressures in the banking sector.

Net interest income (NII) guidance of 5%-6% growth projects modest expansion, though the underlying commentary reveals loan competition is pressuring margins. The positive deposit mix development—with NIDDA at 34.4%—partially offsets NIM compression, as banks benefit when customers hold more unpaid deposits relative to interest-bearing accounts.

The modest NII growth target reflects a matured interest-rate environment where banks face headwinds from fed rate expectations and competitive loan pricing. However, the NIDDA uplift and improving deposit positioning suggest BKU is gaining market share in deposit gathering, a critical competitive advantage in regional banking.

Sector implication: This earnings guidance supports the regional banking thesis that deposit-gathering prowess and mix improvement can partially mitigate NIM compression. Investors should monitor whether BKU's guidance execution validates improved deposit stickiness amid rate volatility.