Procurement & Implementation·Template Guide

    How to Build a Business Case for Government AI

    Building a defensible government AI business case: baseline evidence, public value, total cost, capability investment and realistic benefit timing.

    Programme DirectorsFinance TeamsCIOs
    Direct Answer

    How Should a Government Department Build a Business Case for AI?

    A credible case starts from a measured baseline and states the public value in service terms — faster resolution, wider coverage, fewer errors, better targeting. Cost must include capability building, data work, governance and support, not licence fees alone. Benefits should be phased and evidenced, not projected as immediate savings.

    Key Takeaways

    No baseline means no provable benefit.

    Public value is the primary case; cost saving is secondary.

    Capability and data work dominate real cost.

    Phase benefits honestly across years.

    Practical Framework

    Business Case Structure

    01

    Baseline

    Current volumes, turnaround, error rates and cost to serve.

    02

    Value

    Service, quality, coverage, compliance and officer-time outcomes.

    03

    Cost

    Licences, integration, data, capability, governance and support.

    04

    Evidence Plan

    How each claimed benefit will be measured and when.

    What Government Leaders Should Do Next

    • Measure the baseline before writing the case.
    • Include capability cost as a named line item.
    • Phase benefits over realistic timelines.
    • Define the evidence that will confirm each benefit.

    Risks and Common Mistakes

    • Vendor-supplied savings figures used unverified.
    • Capability and change costs omitted.
    • Benefits claimed in year one.
    • No measurement plan attached to the case.
    Cost of Inaction

    What Delay Costs: AI Business Case Government

    • Proposals compete on optimism rather than evidence.
    • Funded projects cannot demonstrate results.
    • Future AI proposals face heightened scepticism.

    A business case with no baseline is a forecast nobody can ever be held to — including the people who wrote it.

    Evidence

    86%

    of employers expect AI and information processing to transform their business by 2030

    Source: World Economic Forum, Future of Jobs Report 2025
    Evidence

    1%

    of executives describe their organisation's AI rollout as mature

    Source: McKinsey, Superagency in the Workplace, 2025
    Evidence

    63%

    of employers identify skills gaps as a major barrier to business transformation

    Source: World Economic Forum, Future of Jobs Report 2025

    The gap between knowing and acting is where advantage is lost

    Most organisations already sense the shift. The difference is whether their PMO is built to lead it, or report on it after the fact.

    Questions Government Decision-Makers Ask Next

    Who Should Own How to Build a Business Case for Government AI?

    A senior accountable sponsor should own the outcome, while a cross-functional team covers policy, operations, data, technology, legal, security and capability building.

    How Should a Department Start With How to Build a Business Case for Government AI?

    Start with a documented baseline, a narrow set of high-value use cases, a representative pilot cohort and clear measures of adoption, quality, time saved and risk.

    What Should Be Measured?

    Measure competency gain, active adoption, task turnaround, output quality, control compliance and the number of validated use cases moved into normal operations.

    Exploratory Conversation

    Turn This Guidance Into a Department-Specific Action Plan

    Share the intended outcome, current constraints and decision stage. We will help identify the capability, governance and pilot sequence needed before wider implementation.

    Translate the framework into your departmental context.

    Identify immediate readiness and control gaps.

    Outline a proportionate diagnostic or pilot with no obligation.

    Programme Directors, Finance Teams, CIOs