Build an early evidence case that secures initial investment

Building a business case for proactive prevention has much in common with the approach taken to other public sector business cases, and centres on using information from the five stages of the delivery model to help populate the Treasury's 'five cases'.
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Articulating strategic ambitions and estimating the benefits and costs of the model

Local authorities typically develop their prevention business cases following the Treasury Green Book model of five cases, adapting it to reflect both early evidence and strategic ambitions. Successful authorities balance confidence-weighted benefits predictions with sufficient rigour to secure stakeholder support.

An effective prevention business case typically includes:

1. Strategic case

This section establishes the context and objectives for prevention, connecting national priorities with local evidence.

The most compelling strategic cases:

  • Tailor messaging to decision-maker priorities, whether that means alignment with national policies (such as the Fuller Stocktake or Hewitt Review) or demonstrating local resident benefits
  • Use real examples from early work with priority cohorts to illustrate tangible opportunities
  • Show how prevention connects to wider organisational strategies and transformation programmes
2. Economic case

This critical section outlines investment options and their potential returns. Effective economic cases for prevention:

  • Present clear baselines for current demand and expenditure related to the priority cohort
  • Provide transparent, appropriately conservative estimates of preventability based on evidence
  • Profile benefits over time, showing both immediate impacts and longer-term returns
  • Distinguish between resource reallocation and true additional investment required
  • Compare options for implementation pace, showing trade-offs between upfront investment and speed of benefit realisation
3. Commercial case

Building on the economic analysis, this section outlines procurement and resource strategies:

  • Detail approaches for securing any additional resources needed
  • Explain partnership arrangements that maximise existing assets
  • Present clear implementation timelines with key commercial milestones
4. Financial case

This section demonstrates affordability within available funding:

  • Identify sustainable funding sources, recognising that early prevention efforts often rely on non-recurrent funding (e.g., Better Care Fund, transformation reserves)
  • Present cashflow projections showing investment timing and expected returns
  • Address financial risk management approaches
5. Management case

The final section establishes how the project will be delivered:

  • Outline governance arrangements that ensure accountability
  • Detail monitoring and evaluation approaches
  • Explain co-design and partnership engagement methods
  • Present risk management and mitigation strategies

Local authorities seeking support in drafting prevention business cases can access comprehensive guidance through the UK Government's Business Case Guidance for Projects and Programmes. This resource provides structured approaches aligned with the Treasury Green Book model, helping authorities develop well-evidenced, confidence-weighted cases that resonate with decision-makers and support long-term sustainability.

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