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Provisional sums and prime cost items - fixed price contracts in WA

Provisional Sums (PS’s) and Prime Cost (PC) Items are effective contractual mechanisms to address works that are unable to be finalised at the time of contract signing.
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When there are works to be completed that cannot be definitively costed when the contract is signed with the homeowner, Provisional Sums (PS’s) and Prime Cost (PC) Items are a great option to address these elements of the build and cover yourself.

But what are Provisional Sums, and what are Prime Cost Items? When does a Provisional Sum become a variation? When an item exceeds the allowance made, can the difference be claimed? We answer our members’ commonly asked questions in this useful resource.

Gain a fast understanding of these important contractual devices in this informative article designed for builders in Western Australia estimating a residential building project.

Access this resource now

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Who is it for?

Building Professionals

A guide to Provisional Sums and Prime Cost Items. 

What does it include?

  • Provisional Sums
  • Prime Cost Items
  • Guidelines for estimation
  • Claiming for work associated with a PS or PC item
  • Allowances and costs
  • When a PS becomes a variation
  • When a PC item becomes a variation.

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