This guidance examines the general principles of retention, including law, reasons for introduction within a contract, levels of retention, and how amounts are deducted, certified or released.

The publication then focuses on how the standard forms of contract deal with the issue, with a list of the contracts reviewed included within the table of contents. The paper also reviews methods and limits of deduction, inclusion of the retention amount to be included within the contract, release and set off against sums held.