Provisional Sum Definition

Construction legal advice"Provisional Sum" means a sum (if any) which is specified in the Contract as a provisional sum, for the execution of any part of the Works or for the supply of Plant, Materials or services under the Clause "Provisional Sums".
(FIDIC Conditions of Contract Definition)

"Provisional Sum" means a sum included and so designated in the Contract as a specific contingency for the execution of work or the supply of goods materials or services which may be used in whole or in part or not at all at the direction and discretion of the Engineer .
(ICE Conditions of Contract Definition)

Provisional Sum: includes a sum provided for work whether or not identified as being for defined or undefined work and a provisional sum for Performance Specified Work.
(JCT Conditions of Contract Definition)