A Growing Stockpile
Across England and Wales, councils are sitting on over £8 billion in unspent developer contributions. This staggering figure represents money collected specifically to fund local infrastructure — schools, healthcare facilities, parks, and transport improvements — that communities were promised but have yet to see.
The Home Builders Federation estimates that £2.8 billion sits in local authority bank accounts, with the 20 councils holding the largest reserves collectively managing around £2 billion in unallocated funds. Oxfordshire County Council alone holds £287.5 million.
Why Does This Happen?
The reasons for unspent S106 funds are varied, but several common themes emerge:
1. Complexity and Poor Visibility
Each S106 agreement is a unique legal document with specific terms, spending constraints, and deadlines. A medium-sized council might have hundreds of active agreements, each with different trigger points and conditions.
Many councils still track these obligations in spreadsheets, making it difficult to maintain visibility over what money is available, what it can be spent on, and when deadlines are approaching.
2. Capacity Constraints
Planning and finance teams are often stretched thin. S106 management requires coordination across multiple departments — planning tracks the agreements, finance handles the money, and service departments (education, highways, parks) need to identify and deliver projects.
Without dedicated resources or effective systems, S106 management often becomes reactive rather than proactive.
3. Project Delivery Challenges
Even when money is allocated, delivering infrastructure projects takes time. Land acquisition, planning approvals, procurement, and construction all create delays. Meanwhile, S106 money sits waiting.
4. Restrictive Spending Constraints
S106 contributions come with legal strings attached. Money designated for "education infrastructure within 2 miles of the development" cannot be spent elsewhere, even if another school desperately needs funding. These constraints can make it difficult to find eligible projects.
The Cost of Inaction
Unspent S106 funds aren't just a bureaucratic problem — they have real consequences for communities:
- Missed infrastructure — Schools remain overcrowded, roads stay congested, and green spaces go unbuilt
- Clawback risk — Many S106 agreements include clauses allowing developers to reclaim unspent money after a certain period (typically 5–10 years)
- Eroded trust — Communities see new developments but not the promised benefits
- Audit concerns — Large unspent balances raise questions about financial management
Councils With the Largest Unspent Balances
Analysis reveals significant variation across councils. Some of those holding the largest unspent S106 balances include:
- South Gloucestershire Council — £58 million
- Leeds City Council — £58 million
- Greenwich Council — £57 million
- Lambeth Council — £50 million
- Kensington & Chelsea — £44 million
These figures aren't necessarily signs of failure — larger councils handle more development and thus more S106 money. But they do highlight the scale of the management challenge.
What Can Be Done?
Addressing the unspent S106 problem requires both systemic changes and practical improvements:
Better Tracking Systems
Moving beyond spreadsheets to purpose-built systems that provide visibility over all active agreements, available funds, spending constraints, and approaching deadlines.
Cross-Departmental Coordination
Breaking down silos between planning, finance, and service departments to ensure S106 funds are considered when projects are being planned.
Proactive Project Identification
Rather than waiting for projects to come forward, actively identifying where S106 money can be deployed based on available funds and spending constraints.
Regular Reporting
Creating visibility for councillors and the public through regular, accessible reporting on S106 receipts, spending, and available funds.
The Stakes Are High
With housing targets increasing and new developments planned across the country, the flow of S106 money will only grow. Councils that don't get ahead of this challenge risk sitting on ever-larger balances while communities wait for infrastructure that never arrives.
The money is there. The needs are clear. The challenge is connecting the two effectively.