EPC contract

An Engineering, Procurement and Construction (EPC) contract is a single agreement in which one contractor engineers, buys the equipment for, and builds a project. It then hands the finished facility to the owner, usually for a fixed price and a fixed date. The owner states what the facility must do. The contractor works out how.

A generic construction contract works differently. In the traditional design-bid-build route, the owner's design team finishes the design first, and a separate contractor then builds from it. Design and construction sit in separate contracts, and design risk stays with the owner. The Design-Build Institute of America calls the single contract for both design and construction "the fundamental difference" between design-build and other delivery systems [3]. An EPC contract goes one step further. It adds procurement, and it usually adds a performance test at the end, so the contractor must prove the facility works. If the finished plant does not perform, the contractor answers for it.

EPC is also called turnkey, and the heavier form is lump sum turnkey (LSTK). The idea is that the contractor hands over the keys to a working facility. One legal commentator notes that the FIDIC Silver Book, a widely used international standard form, is titled "Conditions of Contract for EPC Turnkey Projects" and uses the two terms interchangeably [2]. Watch one near-twin. EPCM stands for engineering, procurement and construction management. It is a services-only contract in which the contractor manages the work but does not carry the delivery risk [2]. It is a different instrument.

This guide is general information, not legal advice. EPC terms vary by project, form, and country.

Purpose and common uses of EPC contract

An EPC contract gives the owner one point of responsibility. The owner wants a price, a date, and a facility that works. The contractor takes the interface risk between the design, the equipment, and the build.

That bargain suits projects where certainty matters more than the lowest price. FIDIC produced the Silver Book in 1999 for projects where "certainty of final price, and often of completion date, are of extreme importance" [2]. Project-financed deals are the classic case. Lenders depend on the finished facility generating revenue, so they want cost and performance risk pinned down [2]. Typical uses are power generation, water treatment, petrochemicals, and mining and processing plants [2].

Expect to pay for that certainty. A lump sum turnkey price builds in contingency against things costing more or taking longer, and owners expect to pay a premium [2].

Parties involved in EPC contract

Two parties sign. Others sit close by.

• Owner (called the Employer in FIDIC forms). Funds the project, defines the requirements, pays, and accepts the facility. The owner often supplies some items directly, such as site data or specialised equipment, which the contract defines as owner-furnished [1].
• EPC contractor. Designs, buys, builds, tests, and commissions. The contractor is also liable for its subcontractors, who are not third-party beneficiaries of the EPC agreement [1].
• Subcontractors and vendors. Do the specialist work and supply the equipment. Their pricing and warranties sit underneath the contractor's.
• Lenders and their independent engineer. In financed projects, the agreement may require the contractor to cooperate with the financer and have major subcontractors sign a consent [1].
• Engineer or construction manager. In some structures, a separate engineer or manager coordinates the contractor's work under a separate contract with the owner [1].

Key terms and clauses in EPC contract

Pillsbury's guide groups common EPC clauses into six areas: parties and definitions, scope, time and money, completion, liability, and defaults, disputes and general terms [1]. Few agreements contain every clause. Provisions in one place can be undercut by provisions elsewhere, which is why EPC contracts need a full read [1].

The clauses that carry the most weight:

Clause	What it does
Scope of work	Covers engineering, procurement, construction, permits, and training. Excludes defined owner-furnished items [1].
Price and payment	Usually a fixed contract price, paid against a schedule of values or milestones, with lien waivers at each payment [1].
Change orders	Price and time move only by change order, owner-directed or contractor-requested for listed events [1].
Schedule and completion	A defined schedule, often a guaranteed substantial completion date [1].
Performance test	The facility must meet minimum acceptance criteria and pass a test, with a re-run if it fails [1].
Liquidated damages	Pre-agreed sums for delay and for failing the performance test [1].
Limits on liability	Often a cap on delay damages, on performance damages, and overall [1].
Warranty	A defined period after substantial completion, often with an extended warranty for repaired parts [1].
Title and risk of loss	Owner receives title free of encumbrances. Where the contractor buys the project property insurance, it typically bears risk of loss until substantial completion [1].
Security	Parent guaranty, bonds, or a letter of credit [1].

Two clauses deserve a second look.

Ground and design risk. Under the FIDIC Silver Book, the contractor verifies and interprets the owner's data. The owner gives no warranty that it is complete. A catch-all says the contract price is not adjusted for unforeseen difficulties or costs [2]. The contractor is also responsible for the accuracy of the owner's requirements, with stated exceptions [2]. The contract is where this allocation lives. Read it before signing.

Liability caps. The Silver Book's default is that total contractor liability does not exceed the contract price, with carve-outs [2]. In practice, Hosie writes, contractors rarely agree to anything near 100 percent on very large projects, and owners may open at under 50 percent [2]. A cap is a negotiated number. Check what your contract says.

Important dates and lifecycle events

An EPC contract runs on milestones, and money and risk shift at each one.

1. Signing and conditions precedent. Some agreements require other project documents to be signed before notice to proceed [1].
2. Limited and full notice to proceed. The owner releases the contractor to start. A delayed notice can ground a change order, and in the end a suspension or termination right for the contractor [1].
3. Progress payments. Applications for payment on the agreed schedule, with lien waivers [1].
4. Mechanical completion. Often a minimum acceptance criterion for substantial completion [1].
5. Performance test. If the facility fails, the contractor re-runs it or pays performance liquidated damages [1].
6. Substantial completion. The owner takes the facility. Delay damages stop. The warranty period starts.
7. Punchlist and final completion. Remaining items are closed out. The contract may hold back a multiple of the estimated punchlist value [1].
8. Warranty expiry. Retained money or security may be released, subject to the contract [1].

The dates in the contract set the rest of the diary. Capture them early.

Risks and common mistakes

• Assuming turnkey means no risk for the owner. Hosie argues owners do not get the full turnkey solution they want. The contract allocates risk on paper, but large projects are complex and contractors have limited appetite for risk [2]. Plan for negotiation and for residual exposure.
• Skipping the owner-furnished items list. Anything excluded from the contractor's scope falls to the owner. A missed site report or equipment delivery can hand the contractor a change order [1].
• Treating the liability cap as comfort. Liquidated damages and caps limit what you can recover [1] [2].
• Letting change orders drift. Price and time are adjusted only by change order. An informal instruction is a dispute waiting to happen [1].
• Missing notice duties. Contractors must notify the owner of events such as encountering existing hazardous materials and avoid disturbing them. Failure to notify can leave the impact with the contractor [1]. Owners have notice duties too.
• Losing track of security. Bonds, guaranties, and letters of credit have their own terms. Track them like any other contract.
• Leaving the contract after signing. The dates, caps, and approval periods only protect you if someone tracks them.

Related contract types

Several documents sit next to an EPC contract.

• EPCM agreement. Services only. The contractor manages engineering, procurement, and construction, but does not take the delivery risk [2].
• FEED agreement. Front-end engineering design, often a reimbursable first stage that feeds the EPC price [1] [2].
• Subcontracts and supply agreements. The contractor passes work down. See what is a subcontractor agreement.
• Performance bonds and guaranties. Security for the contractor's obligations. See what is a performance bond.
• Offtake and power purchase agreements. Where the facility sells its output. See what is a power purchase agreement.
• Operations and maintenance agreements. Cover the facility after handover, and interface with warranty periods.
• Master service agreements. For repeat services work, not a one-off build. See what is a master service agreement.

For the general construction picture, see what is a construction contract.

Contract-management checklist

Run this against the signed EPC contract.

Capture

• Record the parties, contract price, and currency.
• Record the notice to proceed, guaranteed substantial completion, and final completion dates.
• Record the delay and performance liquidated damages rates and the caps.
• Record warranty duration and extended warranty terms.
• List owner-furnished items and the dates they are due.
• List the security: bonds, guaranties, letters of credit, with expiry dates.

Diarise

• Set reminders for each milestone and for the period before it.
• Diarise notice windows for change requests and claims.
• Diarise security expiry and renewal dates.
• Diarise the warranty end date and a claim cut-off before it.

Review on a cadence

• Monthly: payments against the schedule of values, lien waivers, change order log.
• Monthly: schedule against the guaranteed completion date.
• Quarterly: security validity and insurance certificates.
• Before each milestone: open items against acceptance criteria.
• Before warranty expiry: defects log and outstanding claims.

Once the contract is live, the work is record keeping. Contracko keeps contracts in one searchable repository, uses AI to extract details such as parties, dates, values, and obligations, and sends expiration reminders for dates you need to act on. Start a free trial to see it on your own contracts.

Sources

[1] Pillsbury Winthrop Shaw Pittman LLP, Robert A. James, A Guide to EPC Agreement Provisions, second edition, 2015 (the clause anatomy, parties, completion, liquidated damages, warranty, title and security). pillsburylaw.com/a/web/157254/EPC-Agreement-Provisions.pdf

[2] Jonathan Hosie, Turnkey contracting under the FIDIC Silver Book: What do owners want? What do they get?, November 2007, published by FIDIC (turnkey and EPC terms, EPCM, ground and design risk, liability caps). fidic.org/sites/default/files/hosie07.pdf

[3] Design-Build Institute of America, What Is Design-Build? (the single contract for design and construction). dbia.org/what-is-design-build

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