In managing the expiry of a PFI contract, all parties will want to maximise value from the PFI contract. Authorities will want to inherit an asset in the best possible condition, as this will minimise any future maintenance costs and the risk that services are interrupted. Meanwhile, PFI companies have an incentive to limit expenditure on maintenance and rectification work in the final years of the contract as any savings will be passed through to investors. These misaligned incentives can lead to disputes. The NAO found that more than one-third of authorities who responded to its survey expected to have formal disputes near contract end, with the majority relating to the volume of rectification work and its cost.52