![\"Westpac](\"https:\/\/www.newsbeep.com\/au\/wp-content\/uploads\/2026\/11\/1793629345_967_ImageResizer.ashx.jpeg\")
<\/p>\nKey points<\/p>\n
Westpac says AI-accelerated migration of the legacy St.George data warehouse cut costs from a budgeted $70 million to around $35 million.
\nCEO Anthony Miller says AI tools sped up code conversion, testing and documentation, completing the migration more than two years early.
\nThe project produced a reusable AI data migration capability that Westpac expects to apply to other migrations for further benefits.<\/p>\n
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Westpac says that an \u201cAI-accelerated\u201d data warehouse migration for its St.George business enabled the bank to save $35 million in project costs, and produced a reusable model that should lead to further savings.<\/p>\n
The bank briefly outlined how it used AI on the data warehouse migration at a digital, data and AI investor day in September. [pdf]<\/a><\/p>\n At the time, it was emphasized that AI had shortened the expected delivery time for the migration by two years.<\/p>\n But the bank went further in quantifying the financial benefits of the AI use case at its annual results. [pdf]<\/a><\/p>\n It\u2019s fairly unusual for a technical project like a data warehouse migration to get its own slide in a bank\u2019s financial results, let alone for the bank\u2019s CEO to hold it up as an example of the organisation\u2019s technical capability.<\/p>\n But CEO Anthony Miller said the work was a good example of how AI is helping the bank deliver Unite, the codename for a major technology simplification and transformation program.<\/a><\/p>\n \u201cWe are using AI within Unite,\u201d Miller said.<\/p>\n \u201cAn example is the migration of the legacy St.George data warehouse. The team used AI tools to speed up code conversion, testing and documentation.\u00a0<\/p>\n \u201cThis helped us complete the migration more than two years earlier at half the cost.\u00a0<\/p>\n \u201cWe expect to start booking the benefits of this from FY27.\u201d<\/p>\n On the slide, Westpac revealed that the data warehouse migration was initially budgeted to cost $70 million, but would now come in at around $35 million.<\/p>\n The migration is expected to deliver around $15 million a year in direct benefits.<\/p>\n The decommissioning of the old data warehouse is \u201cplanned for FY27,\u201d Westpac wrote.<\/p>\n