Chapter III: The EPC Contract
The Promise of the EPC Model
The appeal of the EPC contract is straightforward. The owner writes a check, the contractor handles the engineering, procures the equipment, builds the plant, and hands over the keys. Risk is transferred. Schedule is guaranteed. Performance is contractually bound. It is a clean arrangement on paper, and for the right project executed by the right team, it can work exactly as advertised.
But the failure rate of EPC projects tells a more complicated story. Late completions, cost overruns, performance shortfalls, and safety incidents are not rare exceptions. They are common enough that anyone who has spent real time in this industry has a story: I have more than I’d like to admit! The EPC model does not fail because the concept is flawed. It fails because the conditions that make the concept work are not always in place when the contract is signed, or the parties don’t adapt to the changing conditions during construction.
Scope is the Foundation. If It Cracks, Everything Cracks.
The single most important prerequisite for a successful EPC contract is a well-defined scope. This sounds obvious. It is not always practiced.
EPC contracts transfer risk on the assumption that the contractor understands what they are building. When scope is ambiguous, incomplete, based on performance parameters only, or likely to change, that assumption collapses. The contractor prices for what is defined, not for what you intended. If the definition has wiggle room for interpretation, the contractor shall interpret it on the less expensive meaning. You would too, if you were the contractor. Every gap becomes a negotiation, and in a lump-sum environment, those negotiations happen after the contract is signed, when the owner’s leverage is at its lowest.
If your scope is not mature, or if there is a reasonable probability of changes driven by permitting, customer requirements, or evolving design criteria, then an EPC delivery method may not be appropriate. Design-build with shared risk, cost-plus with a guaranteed maximum, or a phased approach with an EPC wrapper on later phases may serve you better. Forcing a lump-sum EPC structure onto an immature scope does not transfer risk. It defers conflict.
Every Change is a Change Order
Once you sign an EPC contract, accept this as a governing principle: every change is a change order. Not most changes. Every change. And also, not all changes are created equal: Negative change orders, where the owner reduces scope, or relaxes a requirement, cost savings offered from the EPC contractor will always be less than what the owner thinks it should be, and vice versa. Here’s an analogy: you negotiated and signed the contract to purchase a 4-wheel drive, 5-seat, gas engine SUV with a guaranteed 30 mpg performance in black color to be delivered in 4 weeks. For the fixed price of $40,000. A week later you realize black will be too hot in the warm climate you live in, and ask your dealer to change the color to white. You expect a few weeks of delay, and perhaps a $1000 change fee. You are OK to wait extra two weeks, but after that, you really need that car. Your dealer says, “no problem, let us take a look on production slots and delivery, and what the extra cost would be”. Two weeks pass, and you keep calling your dealer, and they keep saying they are working on it. Finally, three weeks after signing your contract, and 3 weeks away from really needing this car to be delivered to you, your dealer calls and says they can deliver it in 6 weeks, and it will another $15,000! You are aghast. When the whole car is only $40,000 which was going to come with a black color, can now cost an additional $15,000 when you just change the color? And you have to rent another car and incur more expenses while waiting for the extra 3 weeks waiting for your delivery. How could this be? Your dealer explains in painstaking steps how changing the color messes up the production slot at the factory causing overtime and production inefficiencies, and how white is a very rare color for that model, and they have to procure the paint from overseas, and on and on. You say you changed your mind and want to get back to black again. The dealer says “OK, but it will cost you $5000 since we lost our original slot, and the production teams spent so much time to change the color on your car, and it will still be an additional 3 weeks”. You think this example doesn’t reflect what really happens on an industrial construction project. You are correct, the numbers are much bigger!
This is not cynicism. It is the logical consequence of the contract you signed. The contractor’s team will identify scope deviations, document them, and price them. That is what a well-run EPC firm does. They are not necessarily trying to gouge the owner or take advantage of the situation, although some will, but any change introduces risk to the project’s schedule and cost, and they will price that risk in their favor. Owners who are caught off guard by this dynamic either did not understand the contract model or convinced themselves their project would be different.
The practical implication is that owner-side discipline on scope freeze matters enormously. Time to negotiate scope is before the contract is signed, not after mobilization.
The Schedule of Values Is Not a Formality
Many owners treat the schedule of values as a back-office billing document. On a turnkey contract, the reasoning goes, you are paying for the finished product, not the steps along the way. What does it matter how the payments are structured?
It matters a great deal.
The schedule of values controls your cash flow exposure and your leverage throughout the project. Front-loaded payment schedules transfer cash to the contractor before value is delivered, reducing your ability to hold the contractor accountable for performance. A schedule of values that is not carefully aligned with actual work-in-place milestones leaves owners overpaying at each draw and underprotected when problems emerge.
I once had a project where we had included black start capability in the EPC contract, which was removed from scope after contract signing. The schedule of values only listed the diesel generator set for black start. We expected the credit to be roughly three times the cost of the generator itself, since black start capability also includes controls, electrical wiring, switchgear, foundation, sound attenuation, exhaust ducting, and commissioning. What the EPC contractor offered was barely above the cost of the emergency diesel generator, and their argument was “this is what they budgeted in their bid”! Because the full black start system was not itemized in the schedule of values, we had no contractual basis to dispute it.
In another, more impactful, example, imagine the EPC contract being terminated, either by the owner or the contractor when $25M of payments have been made on a $50M project by the owner. The owner hires a team to do an inventory (equipment and material installed and received on site) and realizes that only $15M of actual work has been achieved. Good luck getting the difference from the contractor!
Interface Risk: The Gap Between Contractor Scope and Everything Else
EPC contracts define what the contractor is responsible for. They are less precise about what happens at the boundaries. Equipment supplied by the owner, utility connections, interconnections with existing infrastructure, third-party systems that must integrate at startup: these interfaces are where projects quietly accumulate risk, especially if the work is done on a brown field or is an extension to an operating facility.
The contractor will argue, correctly, that they are responsible for what is in their scope. Anything that touches the boundary is, by definition, an interface, and interfaces are where fingers get pointed in both directions. Managing interface risk requires explicit language in the contract, a clear owner-side coordinator who owns each interface, and early engagement with all parties before the interface becomes a critical path item.
Means and Methods: Know What You Own
EPC contracts typically reserve means and methods to the contractor. The owner specifies outcomes; the contractor determines how to achieve them. This is appropriate. Prescribing construction methods to a contractor while holding them to a fixed price creates a muddled risk allocation that benefits neither party.
But owners need to understand the implication. When something goes wrong on site, and you have directed or approved a specific method, you have potentially taken on a share of the risk. Owner representatives who give informal direction on construction methods, approve submittals that constrain the contractor’s approach, or weigh in on sequencing decisions are quietly eroding the risk transfer the EPC model was supposed to provide. Know what is yours to direct and what belongs to the contractor. However, owners should spell out in the contract what QA/QC documentation the contractor is obligated to issue during construction to ensure quality and code compliance.
Liquidated Damages Are a Deterrent, Not a Safety Net
Liquidated damages for schedule delay and performance shortfall are standard in EPC contracts, and owners sometimes treat them as financial protection. They are not. They are a deterrent.
LD provisions are typically negotiated with caps. They rarely cover the full cost of a delayed commercial operation date: carrying costs on construction financing, lost revenue, customer obligations, regulatory commitments, and the management bandwidth consumed by a project that will not close out. When an owner actually collects on LDs, they are almost always recovering a fraction of their real losses.
The value of LD provisions is in the incentive they create, not the recovery they guarantee. Structure them to motivate the right behavior, then build your risk model around the assumption that if you need them, they will not make you whole.
Budget for Your Own Team
One of the more consistent patterns in EPC project failures is an owner’s team that is too thin to do its job. The common trap the owner falls into is the “turnkey” belief. Imagine you are renovating your kitchen for $20k and you hired a general contractor with a fixed, turnkey price, after you agreed on the design, cabinets, appliances, etc. Would you then leave the contractor and not check their work until they are completely finished? You would never do that in your home for a $20k project. Why would you consider doing it for a $200M project?
The EPC model does not eliminate the need for owner-side project management. It changes its character.
You need people who can review submittals, track schedule, monitor safety, manage interfaces, evaluate change order claims, and make timely decisions. Understaffing the owner’s team to save money is a penny-wise pound-foolish economy. Delayed decisions become contractor claims. Missed submittals become field changes. Unassessed invoices become overpayment (see schedule of values paragraph above!) Absent oversight becomes a project that drifts until it cannot be corrected without significant cost.
Budget for your PM team as a project cost, not as an overhead line to minimize.
Manage the Relationship Like It Continues After Handover
There is a tension in EPC contracting between protecting your interests and maintaining a functional working relationship with your contractor. Both matter, and they are not mutually exclusive.
Treat your EPC contractor the way you would treat a partner you intend to work with again, because you may. The energy world is not large. Relationships carry across projects, and a contractor that feels respected and dealt with fairly will perform differently than one that feels squeezed. Reputations of companies, and individuals, matter.
At the same time, do not let that relationship orientation make you passive about documentation. Companies, and people in those companies, come and go. Documentation stays with the project for decades. Insist on receiving copies of engineering deliverables, QA/QC records, equipment documentation, warranties, and as-built drawings throughout the project, not just at closeout. Ensure that major equipment and spare parts are delivered to your site or warehouse as they are procured, not held in contractor staging. Operate as though the relationship may end unexpectedly at any point, because sometimes it does.
The best owners in this business hold both of these things at once: genuine respect for the contractor relationship with the expectation to work with them again on the next project while being disciplined to confirm progress with a sound project management process as if they are leaving site tomorrow.
The Contract Attorney: Not the Place to Cut Corners
Attorneys, especially in the USA, are expensive. Do you know what is significantly more expensive? A poorly negotiated and worded EPC contract. Don’t underbudget your legal expenses for your project. If you do, you’ll pay for it in multiples. It is a common trap for those with technical or financial, and not legal, background to focus on the – you guessed it – technical and financial clauses of a contract and gloss over the legal sections such as dispute resolution, force majeure, default, termination, etc. These technical and financial sections are of course very important. However, when a project has schedule, budget, or performance issues – usually one triggers the other two! – these legal sections become even more important. In an EPC contract I witnessed “assignment of the subcontractors” being omitted as a right for the owner to assume if the EPC contract was terminated. It cost the owner dearly, and months of no progress in the field, when the contract was terminated even though the owner was more than happy to sign and pay the subcontractors.
An experienced contract attorney will not slow your project down. The disputes they help you avoid will.
What Comes Next
Understanding the structure of the contract and where risk actually lives gets you prepared for signing. In Chapter IV, we’ll delve into the real work: managing construction, and if you are the owner, managing the EPC contract that governs it.