Capital One Financial reported a 54% year-over-year increase in net interest income (NII) for the fourth quarter of 2025, driven by a 22% rise in average credit card loans and a significant contribution from the recently acquired Discover portfolio. The bank’s disciplined deposit cost management helped offset the impact of Federal Reserve rate cuts, as the company maintained its average funding cost below 1.5%. The Discover addition contributed approximately $450 million in incremental interest income during the quarter, making up nearly one-third of the overall NII gain.

In December 2025, Capital One completed its $5.15 billion acquisition of Brex, expanding its footprint in corporate payments and high-margin fintech services. Management expects Brex to add $150 million in annual revenue run-rate by mid-2026 and drive cross-sell opportunities with Capital One’s small-business credit card base. Combined with the Discover integration, these deals have increased the company’s total loan portfolio by 18% year-over-year and are projected to boost non-interest fee revenue by at least $300 million in 2026.

Truist Financial raised its rating on Capital One to Buy, citing robust credit card lending growth, low delinquency rates near 2.1%, and a potential 24.9% upside to its price target. However, the bank’s elevated exposure to unsecured consumer credit elevates loss-rate risk if economic conditions weaken. Moreover, investments in AI-driven underwriting and premium card rewards are expected to exert 20 to 30 basis points of margin pressure in 2026 before delivering longer-term efficiency gains.