What do Westpac's (WBC) net interest income, margin and earnings per share trends show?
Westpac's net interest income grew steadily across the years in its reported results, from $15.1B in FY2016 to $19.4B in FY2025, with only a brief dip to $16.7B in FY2020. Non-interest income moved in the opposite direction, falling from $5.8B in FY2016, and a high of $6.3B in FY2017, to $3.0B in FY2025, after touching a low of $2.4B in FY2022.
Net interest margin narrowed over the period, from 2.1% in FY2016 to 1.81% in FY2025, having peaked at 2.13% in FY2018. Provisions for loan losses were a recurring charge in most years, ranging between $335M and $1.1B, but spiked sharply to $3.2B in FY2020 before easing to $424M by FY2025; FY2021 was the only year in which no net provision charge was reported.
Diluted earnings per share tracked these swings, climbing from $2.18 in FY2016 to a high of $2.30 in FY2018, then falling to $0.64 in FY2020 as provisions spiked. EPS recovered unevenly in the years that followed, reaching $1.95 in FY2023 and $1.99 in FY2025, a level still below the FY2016 to FY2018 range despite net interest income being higher in FY2025 than at any other point in the reported record.
Updated 6 Jul 2026