
A cost-plus contract is a type of agreement where the contractor is reimbursed for their expenses plus a predetermined fee, known as a markup.
This contract type is often used for projects with uncertain or high-risk costs, such as construction or research and development.
The cost-plus contract is particularly useful for projects where the scope is not well-defined or where the costs are difficult to estimate.
The contractor's profit is directly tied to the project's expenses, making it a straightforward and transparent arrangement.
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What is a Cost-plus Contract?
A cost-plus contract is an agreement where the client pays the service provider for their actual expenses incurred in completing the project, along with an additional fee to cover overhead and profit.
This type of contract is often used for projects where the scope of work is uncertain or subject to change.
Cost-plus contracts can also be used for projects that are complex or require specialized expertise, allowing the service provider to be reimbursed for direct expenses and receive an agreed-upon percentage or a fixed fee for their services.
Budgetary restrictions or the inability to estimate the overall scope of the work in advance are common reasons for using a cost-plus contract.
In construction, cost-plus contracts are drawn up to reimburse contractors for direct costs, indirect or overhead costs, and provide the opportunity to make a specific profit.
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Benefits
A cost-plus contract can be a great option for projects with uncertain or evolving scopes. This type of contract allows for flexibility and reduced financial risk for contractors.
In a cost-plus agreement, the client and service provider share the risk of cost overruns or unforeseen challenges to the project. This shared risk can lead to a more collaborative and transparent working relationship.
The contractor's risk is minimized, as they are reimbursed for all allowable costs, which reduces the risk of financial loss. This is especially useful in uncertain or high-risk projects, like R&D, where costs are hard to predict.
Cost-plus contracts also provide a steady cash flow, as payments are made as costs are incurred. This can be beneficial for contractors who need to manage their finances carefully.
The owner benefits from a cost-plus contract, as it instills confidence in the contractor that they'll be paid and therefore, they'll be more willing to start a project even if not every detail has been finalized.
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Here are some key benefits of cost-plus contracts:
Cost-plus contracts can also lead to higher quality work, as contractors have little incentive to cut corners. Additionally, these contracts can build trust between the contractor and the owner, leading to future opportunities for partnership.
Criticism and Drawbacks
A cost-plus contract may not be the best choice for every project, and there are several reasons why. It can be difficult to determine the final cost, which can lead to unexpected expenses.
One of the main drawbacks of a cost-plus contract is that it requires additional oversight and administration to ensure that only permissible costs are paid. This can increase the cost of the contract, and the government may need to delay final payment, leading to increased costs.
A cost-plus contract can also create perverse incentives, where contractors have an incentive to underestimate their target costs in order to maximize their profits. This can make it difficult for the government to distinguish between efficient and inefficient contractors.
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In a cost-plus contract, the profit element does not vary with costs, which means that contractors have no incentive to control costs. This can lead to higher costs and a higher final cost for the project.
A cost-plus contract can also lead to disputes over what constitutes a reimbursable expense, especially when dealing with indirect costs or overhead. This can be a complex issue, and additional resources may be needed to reproduce and justify all related costs.
Here are some of the potential drawbacks of a cost-plus contract:
- Unknown final cost
- Requires additional oversight and administration
- Creates perverse incentives
- No incentive to control costs
- Potential for disputes over reimbursable expenses
Fee Structure and Reimbursement
A cost-plus contract typically comes with a term outlining the fee structure. The service provider receives a fee in addition to the reimbursed costs.
The fee can be fixed, a percentage of costs, or based on performance. Many cost-plus contracts include provisions for the client to audit the service provider’s records and verify the costs.
The service provider may be eligible for an additional incentive fee based on certain performance criteria, such as completing the project ahead of schedule or under budget. To mitigate the potential for cost overruns, some organizations use incentive fees for the service provider to perform efficiently.
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The service provider can earn an award fee based on subjective evaluation criteria related to performance, quality, or innovation. The award fee is subjectively determined based on the service provider's performance, cost reimbursement, and a fixed fee.
In some cases, the service provider's fee is a percentage of the total project costs, which can incentivize service providers to increase the overall cost. This method is used less frequently due to the potential for increased costs.
The service provider is reimbursed for costs, and the final fee is adjusted based on whether the service provider meets certain performance goals. The service provider is also reimbursed for all project costs plus a fixed fee, regardless of the project's final cost.
Cost-plus contracts often include specific terms to outline the contractual relationship between the parties. These terms define how costs will be managed, how the service provider will be compensated, and how the project will be executed.
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Flexibility and Risk Management
Cost-plus contracts offer flexibility in handling changes in the scope of work or when costs are difficult to predict in advance.
This flexibility is particularly beneficial in projects with evolving requirements, such as software development or IT consulting services, where changes are common and expected.
Contract management software can also help identify potential risks associated with cost-plus contracts, such as cost overruns or schedule delays.
By putting contract managers in the driver's seat, the software enables project teams to focus on delivering project objectives while controlling costs and minimizing negative impacts.
The service provider's responsibilities include implementing risk management practices to mitigate unforeseen challenges, such as delays or cost overruns, which can be particularly relevant in research and development projects.
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Flexibility
Cost-plus contracts offer flexibility in managing projects with uncertain costs or changing requirements. This type of contract allows for changes in the scope of work or when the cost is difficult to predict in advance.
Developing complex software systems can involve iterative processes and evolving requirements, making a cost-plus contract a suitable choice to avoid penalties for changes made during development.
R&D projects frequently involve unforeseen challenges, and a cost-plus contract provides flexibility in funding, which is essential for medical research, clinical trials, and drug development.
With a cost-plus contract, contractors can focus on delivering quality results without worrying about the exact cost, allowing for a more collaborative and flexible approach to project management.
Deltek Costpoint, a comprehensive ERP solution, provides robust tools to streamline and simplify the management of cost-plus contracts, from cost tracking and allocation to audit readiness and compliance.
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Risk Management for Service Providers
Risk management is a critical aspect of cost-plus contracts for service providers.
In a cost-plus contract, the service provider takes on less financial risk compared to a fixed-price contract.
The service provider's duties include overseeing the project's execution, hiring subservice providers if necessary, procuring materials, and ensuring the work complies with industry standards and regulations.
The contract may include requirements for quality assurance, specifying performance standards or benchmarks that the service provider must meet.
The service provider may be required to implement risk management practices to mitigate unforeseen challenges, such as delays, cost overruns, or safety issues.
Contract management software can help identify potential risks associated with cost-plus contracts, such as cost overruns or schedule delays.
Deltek Costpoint, a comprehensive ERP solution, provides robust tools to streamline and simplify the management of cost-plus contracts, from cost tracking and allocation to audit readiness and compliance.
By putting contract managers in the driver’s seat in workflow automation and risk management, the software enables project teams to focus on delivering project objectives while controlling costs, ensuring compliance, and effective communication.
Types of Cost-plus Contracts
A cost-plus contract is a type of agreement where the client pays the contractor for all the costs incurred, plus a predetermined markup or fee.
In situations where the scope of work is unclear or subject to change, a cost-plus contract provides the necessary flexibility to address unforeseen issues or additional requirements.
Developing complex software systems can involve iterative processes and evolving requirements, which is why a cost-plus contract is often used to ensure the client isn't penalized for changes made during development.
IT consulting services may also benefit from a cost-plus contract when the exact scope of work is unclear, providing a way to address unforeseen issues or additional requirements.
Costpoint's automated cost allocations ensure that all costs are accurately tracked and assigned, reducing the risk of human error and ensuring compliance with regulatory bodies like DCAA.
Where and How to Use a Cost-plus Contract
A cost-plus contract can be a great option for projects where estimating costs upfront is challenging.
The U.S. government extensively uses cost-plus contracts in areas such as military development, healthcare, and infrastructure.
Cost-plus contracts are most commonly used in large-scale construction projects where the full scope of work may not be known in advance.
In government and public sector projects, cost-plus contracts are often used when the scope is uncertain or when high-quality results are required.
Defense contracts and government-funded research projects also frequently use cost-plus contracts to manage risks and ensure transparency in pricing.
These contracts can be particularly useful for contractors who lack necessary information for a thorough estimate or for project owners who want to encourage a timely project launch.
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Where Is a Contract Used?
A cost-plus contract is often used in projects where estimating costs upfront is challenging. This type of contract is commonly used in industries with unpredictable costs or long-term projects.
Some real-world scenarios where a cost-plus contract might be the best suited include large-scale construction projects, where the full scope of work may not be known in advance. Defense and aerospace projects, which are often complex and have evolving requirements, also benefit from cost-plus contracts.
In the construction industry, cost-plus contracts are especially useful for large-scale projects, allowing for flexibility for unexpected expenses. Government and public sector projects, such as defense contracts and research and development projects, also frequently use cost-plus contracts to manage risks and ensure transparency in pricing.
Here are some industries where cost-plus contracts are commonly used:
- Construction: Especially in large-scale projects
- Defense and Aerospace: Given the complexity and evolving nature of projects
- Research and Development: When outcomes are uncertain
These industries often have unpredictable costs or long-term projects that require flexibility in pricing. By using a cost-plus contract, they can ensure that costs are covered and that the project can be completed successfully.
Government Projects
Government projects often benefit from cost-plus contracts, which allow for flexibility in unpredictable costs and long-term projects. These contracts are commonly used in public works projects where the scope is uncertain or high-quality results are non-negotiable.
The U.S. government extensively uses cost-plus contracts in areas such as military development, healthcare, and infrastructure. These contracts are governed by the Federal Acquisition Regulation (FAR) Part 16, which outlines the guidelines for selecting the appropriate contract type based on project circumstances.
In defense contracts, cost-plus contracts are often used to manage risks and ensure transparency in pricing due to the complexity and classified nature of many projects. Research and development projects, particularly those funded by the government, can have unpredictable outcomes, making cost-plus contracts a suitable option.
Government-funded research projects can have unpredictable outcomes, and a cost-plus contract allows for adjustments in funding as the project progresses. Defense projects are also a good fit for cost-plus contracts, as they often involve classified information and complex requirements.
Here are some examples of government projects that commonly use cost-plus contracts:
- Public works projects
- Defense contracts
- Research and development projects
Management and Compliance
Managing cost-plus contracts requires strict adherence to federal regulations, particularly the FAR and Cost Accounting Standards (CAS). Contractors must ensure their accounting systems can trace both direct and indirect costs.
Government contractors are subject to annual incurred cost submissions, which serve as a formal report detailing the actual costs incurred during the performance of a contract. These submissions are required annually and are subject to audit by the Defense Contract Audit Agency (DCAA).
Costpoint, a comprehensive ERP solution, provides robust tools to streamline and simplify the management of cost-plus contracts. It automates the allocation of direct and indirect costs across multiple projects, ensuring that all costs are accurately tracked and assigned.
The system provides out-of-the-box segregation of costs, distinguishing between allowable, unallowable, direct and indirect costs, which is crucial for FAR and CAS compliance. This automated functionality reduces manual work and ensures transparency.
Contractors can use Costpoint to confidently manage even the most complex cost-plus contracts, improving their cash flow, reducing administrative burden and enhancing their ability to win future government contracts.
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Here are the key benefits of using Costpoint for managing cost-plus contracts:
- Reduces the risk of human error and ensures that all cost allocations meet the stringent requirements of DCAA and other regulatory bodies.
- Provides out-of-the-box segregation of costs, distinguishing between allowable, unallowable, direct and indirect costs.
- Simplifies the process of preparing annual incurred cost submissions, a requirement for most cost-plus contracts.
Example and Template
A cost-plus contract can be tailored to a specific project or business by modifying a sample template, such as the A103 produced by the American Institute of Architects (AIA). This template provides the basic structure of a cost-plus construction agreement, including fields that specify reimbursable costs and how the contractor's fee will be calculated.
In some cases, a general contractor may have already established a relationship with preferred specialty contractors, allowing them to provide a good-faith estimate for the total project cost and a schedule of values. This was the case with Greene Construction, who had already contacted preferred specialty contractors before signing the contract with the property development company.
The cost-plus arrangement can include a fee for the contractor's indirect costs, overhead, and profit, such as the 10 percent fee stipulated in the contract between Greene Construction and the development company. This fee is typically calculated as a percentage of the total project costs.
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Example

A cost-plus contract is a great way for a contractor to secure a significant fee with relatively low risk. This type of contract reimburses the contractor for all project costs, plus a fee to cover indirect costs, overhead, and profit.
In a cost-plus arrangement, the contractor provides a good-faith estimate for the total project cost, as well as a schedule of values. The schedule of values is informed by price quotes from specialty contractors.
The contractor's fee is usually a percentage of the total project costs, such as 10 percent in the case of Greene Construction. This fee covers the contractor's indirect costs, overhead, and profit.
The project owner typically requests draws from the contractor by providing supporting documentation to demonstrate a certain percentage of work completed according to the schedule of values. This ensures that the contractor is reimbursed for their costs as the project progresses.
Occasionally, the contractor may need to have a change order approved to amend the original contract. This is typically done through a dispute resolution process, such as binding arbitration.
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The contract may also stipulate that the contractor's profit is a percentage of the contract's full price, such as 15 percent in the case of ABC Construction Corp. This means that the contractor's profit is calculated based on the full contract price, not just the actual costs incurred.
The contractor may also be eligible for an incentive fee if the project is completed within a certain timeframe, such as nine months in the case of ABC Construction Corp. This provides an additional incentive for the contractor to complete the project efficiently.
The contract may require the contractor to submit dated receipts for all expenses, and the client may inspect the job site for quality to verify that specific components are completed to specification. This ensures that the contractor is reimbursed for their costs and that the project meets the required standards.
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Template
Many owners and contractors rely on the A103, a sample cost-plus contract produced by the American Institute of Architects (AIA).

The A103 provides the basic structure of a cost-plus construction agreement, including fields that specify reimbursable costs and how the contractor’s fee will be calculated.
Templates are a great starting point for forming a cost-plus contract, though nearly every owner and contractor will need to modify a sample contract so that it’s tailored to the needs of a specific project or business.
Nearly every owner and contractor will need to modify a sample contract to suit their needs.
The A103 includes standard sections about payments, dispute resolution, liquidated damages, contract termination, and more.
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Key Takeaways
A cost-plus contract is a type of agreement where one party reimburses the other for expenses plus a specified profit proportional to the full value of the contract.
In a cost-plus contract, contractors must provide proof of all related expenses, including direct and indirect costs.
Here are some key details to keep in mind:
- In a cost-plus contract, the profit is proportional to the full value of the contract.
- Contractors must provide proof of all related expenses.
- Cost-plus contracts are often used in construction when the budget is restricted or when an estimate is difficult to finalize.
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