Two Years On: Billions Still Sitting in Unspent Developer Contributions and What That Means for Developers
February 18, 2026
Two years after the Home Builders Federation (HBF) first highlighted the scale of unspent developer contributions, more than £8 billion in S106 and CIL remains unused across England and Wales, with a significant portion dormant for over five years. For developers, it raises a critical question: if infrastructure isn’t being delivered, are these obligations still proportionate or commercially justified? This article explores why the issue persists and how reviewing triggers, outdated requirements and opportunities for modification or claw-back can turn S106 from a fixed liability into an actively managed commercial tool that protects viability and unlocks value.