Construction Management Engineering

Cost Plus Contracts In Construction

What’s Cost Plus Contract?

The client agrees to cover the real project costs in a building cost-plus agreement. These expenses include equipment and labor, plus additional expenses incurred in completing all works. The “plus” part refers to a fixed fee or percentage agreed upon in advance that covers the contractor’s overhead & profit. Typically, these contracts are “open book,” meaning the owner has the right to see actual expenses. In construction, some cost-plus agreements involve a guaranteed maximum price. This type of contract is different from Lump Sum Contract.


Main components of a cost-plus-contract:

1-Direct costs:

The main contractor uses materials, supplies, labor, machinery and professional consultant.

2-Overhead costs/ indirect costs:

All related expenses that are needed to perform the contract; typically a percentage of labor costs and can include office rent, insurance, office supply, communication expenses, mileage, and printing or reproduction of construction drawings

3-Fee or profit:

Typically a fixed percentage (%) based on the cost of labors directly associated with the work


When to Use a Cost-Plus Contract

This type of contracts may be used when the budget is being restricted or when there is a high probability that the actual cost of works might be reduced. A cost-plus contract is preferred when there is not enough data to perform a detailed estimate of the work or when the design is not completed. Governmental agencies prefer these contracts because they can select the contractor based on their qualification instead of the low bidder. Cost-plus is widely used to perform research & development works because the risk can be controlled by the contracting officer.

Pros and Cons of Cost-Plus Contracts

Advantages of A Cost-Plus Contract :

  • The contractor won’t be able to reduce workmanship.
  • It can focus on the quality of works instead of cost.
  • It could cover all related expenses.
  • The contractor’s risk is minimized

Disadvantages of A Cost-Plus Contract :

  • Present uncertainty to the project owners because the final cost cannot always be determined at the beginning
  • Require additional resources and management to reproduce and justify all associated costs
  • May lead to dispute when trying to recover construction-related expenses
  • May lead to projects running longer than expected

Types of Cost-Plus Contracts

Cost-plus agreements may include features or variants to meet particular construction projects ‘ requirements or special circumstances.

1.Cost-Plus incentive fee:

Incentive fees are based on the contractor’s performance & are set under the contract provisions. The type and amount of the incentive may be based on the project goals or schedule deadlines.

2.Cost-plus award fee:

A cost-plus award fee provides for award fees, predetermined &  set forth in contract documents. The fee can be a gratitude or penalty fee.

3.Cost-plus fixed rate:

A cost-plus fixed-rate contract sets predetermined labor rates based on the contractor’s history and labor costs. It is a contract used by contractors who really know their actual costs, but it provides little flexibility for contingencies.

4.Cost-plus fixed fee:

It covers direct & indirect costs plus a pre-determined fixed fee.

See Also

Type Of Construction Contract
Fidic Letter By Contractor

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