This paper looks at the Performance Based Allocation (PBA) system of the International Development Association (IDA), and how it relates to fragile states. The PBA is the mechanism used by the IDA to allocate concessional aid resources across developing countries deemed eligible for such assistance. The central questions addressed in the paper are a) whether the PBA in its current form allocates a large enough share of IDA resources to fragile states, and if not b) how the PBA could be adjusted or ‘fine-tuned’ to bring about a more appropriate allocation.