• Tue. Aug 25th, 2026

What is a Cost-Plus Contract in Construction?

ByMattison

Aug 4, 2023

How do cost-plus contracts are implemented?

Cost-plus contracts are contracted for construction that demands reimbursement for the project’s expenses and markup to cover the contractor’s overhead and profit. Also, this name represents a shortened method of identifying exactly what the contract covers: the project’s costs and markups for contractors.

What is covered by the cost-plus contract?

Project Costs Direct expenses associated with building projects, which include material, labor, and subcontractor profits, as well as expenses allowances, as well as change orders

Contractor Markup It is usually charged as a percentage of the cost of the project or a fixed fee that covers the General Contractor’s expenses and profits.

This kind of contract is frequent between project owners and a general contractor, but it can also be utilized for general and special contractors.

The contract between the owner of the project and the general contractor will outline precisely what is for the project. Also referred to as Direct costs, Project costs usually comprise all the fees directly connected to construction-related activities, with the majority of costs coming from the labor, materials, and markup imposed by subcontractors.

It will spell out how the contractor’s markup will be determined. There are several common ways to manage the cost of the contractor’s services:

  • Percentage of the cost The contractor is paid an amount equal to an amount that is a percentage of the total project’s cost. The percentage rate can vary between industries and projects; however, it is usually between 5 and 25 percent.
  • Fixed fee: The contractor is paid a fixed amount at the time of contract creation.
  • Incentive fee: The contractor is paid incentives in addition to the price they have set when they achieve the contract’s goals, such as cost savings or a quicker timeframe.
  • The contractor will receive an additional award in addition to the amount they have already paid when they meet their performance goals as stated in the original contract and the construction documents.

In addition, cost-plus contracts are typically more straightforward to negotiate because of the lower risk to contractors. Contrary to lump sum contracts, where contractors might face lower profits when project costs exceed their expectations, cost-plus agreements assure contractors will get cost reimbursement and still earn the fee.

However, the cost-plus contract isn’t an unpaid check from the project’s owner to general contractors. The agreement will generally contain a clause requiring contractors to give the owner a fair estimate of the project’s cost. In addition, the contractor must offer a list of values that will indicate the estimated price of each component of the project, and the schedule will be used when subcontractors submit progress payment applications by the amount completed.

It’s in the best interests that the general contractor offer an acceptable estimate for the project. If the GC can come close (or below) to the budget estimate and the project’s owner is satisfied, they are more likely to believe in the contractor and cooperate with them later. Additionally, a general contractor who does not offer a reasonable estimate might be unable to complete the last change orders resulting in a cost for the project that isn’t reimbursementable, reducing the general contractor’s fee.

Thus, although the cost-plus contract can create an advantageous financial position for the GC, they also tend to gain more value over time because they provide significant value to the owner. In addition, it is crucial to remember that cost-plus agreements do not pay for the costs resulting from the negligence or mistakes of a contractor. However, they can cover estimating errors.

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Benefits of a cost-plus contract

Cost-plus contracts offer a few benefits for project owners and contractors.

Benefits of cost-plus contracts

Owners Contractors

Simpler negotiations

Projects are usually completed sooner because contractors know the costs will already be covered. Lower risk

Since the costs will be covered and the price is fixed, Contractors are less at risk.

Hybrid contracts are a possibility.

If they guarantee the maximum price, owners will stay within the budget. Might include incentives

Specific contracts include incentive programs to motivate better work or reduce costs.

Ability to initiate projects with no apparent purpose

Since contractors know they’ll be paid regardless of the project’s scope, they are more ready to begin the project using cost-plus. Guaranteed profit

With a cost built-in contracts, you can be assured they will make money.

Transparency increased

Owners will be able to see the project’s actual cost while it develops. Better cash flow

Because of the method by which expenses are refunded, the cash flow burden is usually lower in this type of contract.

Potentially better quality

Contractors have no incentive to sacrifice, which means the final product may be more expensive. Creates trust

Due to the transparency and trust required to conclude the cost-plus contract, contractors can build trust, leading to new partnerships.

Generally speaking, those more concerned with the timeline and speed of discussions (rather than budget) benefit from cost-plus agreements since they are simpler to work in conjunction with general contractors.

General contractors are more comfortable with the lower risk of cost-plus contracts because these contracts offer a near certainty for the contractors to earn a profit on the project and get the direct costs refunded.

Advantages of cost-plus contracts

However, cost-plus agreements have certain disadvantages for the parties involved but can be alleviated by the proper contract structure and relationship development.

Cost-plus contracts have disadvantages:

Owners Contractors

Unknown cost at the end

When you sign a standard cost-plus contract, The final price is a guess, but the exact amount is unknown.

Requires careful analysis of reimbursement-able items

There are a variety of costs that are to be reimbursable. Therefore, contractors should be sure to read the contract carefully to ensure that the costs don’t get reduced their fees.

Requires an authorized partner

Without a reliable partner, owners could be concerned that the GC is trying to drive over the project’s cost. Requires advanced cost tracking

The GC must provide adequate documentation of the cost of items and completed ones.

Potential for disputes

Since the owner is responsible for all expenses, they may be required to audit the costs to ensure the contract’s terms reimburse them. Change orders could cause disputes.

Since most expenses are covered by insurance, changes outside the original scope of work could be challenged.

Mattison

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