What is a liquidated damages clock on an EPC contract?

If you've sat through a bank meeting on a refinery or LNG project financing, you've heard someone ask "what's the LD exposure" like it's a single number. It isn't. The liquidated damages clock is a mechanism buried in the EPC contract's schedule and remedies sections, and the date it starts running is often argued over more than the rate itself.

The basic mechanism

An EPC contract sets a Guaranteed Mechanical Completion Date, sometimes called Scheduled Completion or Substantial Completion depending on who drafted it. If the contractor doesn't hand over a mechanically complete, commissioned unit by that date, liquidated damages start accruing, usually per day or per week, until completion happens or a liability cap is hit. The cap is commonly a percentage of total contract value, and once you hit it the owner's remedy often shifts from LDs to termination rights.

That's the easy part. The number everyone fights about is what date the clock runs from, because the contract rarely says "the date construction started." It says something closer to "the date on which Notice to Proceed was issued, as adjusted by any Excusable Delay or Change Order extending the Guaranteed Completion Date." Every clause after "as adjusted" is where the argument lives.

When the clock starts

Three dates get confused constantly, and they are not the same thing:

• Notice to Proceed (NTP). When the owner authorizes the contractor to mobilize and start engineering or site work. This sets the baseline, not the completion target itself.
• Guaranteed/Scheduled Completion Date. The baseline NTP date plus the contract duration, this is the date LDs trigger against if completion slips past it.
• LD trigger date, as adjusted. The completion date after every approved extension of time (EOT) gets added in. This is the real number lenders model, and it moves throughout the project as change orders and force majeure claims get approved.

That third date is the moving target. A contractor hitting weather delays, owner-caused design changes, or permitting holdups can file EOT claims that push the trigger date out without touching the LD rate. From the outside, a project that looks six weeks behind physical schedule might not be a single day into LD exposure yet, because the trigger date moved with it. Conversely, a contractor who's quietly behind but hasn't filed for an extension is running the clock against the original date whether they've flagged it or not.

Cure periods, caps, and carve-outs

Most EPC contracts give the contractor a cure period, often 30 to 90 days past the guaranteed date, before the owner can terminate for default rather than just collect LDs. Force majeure and owner-risk events are carved out entirely, meaning the clock pauses rather than runs. And almost every contract caps total LD liability, frequently somewhere in the 10-20% range of contract price, after which the owner's only real lever is termination and re-procurement, which is a much worse outcome for a lender than a few months of per-diem damages.

None of this is visible from a monthly contractor schedule update alone. The schedule report tells you the contractor's version of progress against the contractor's version of the trigger date. It doesn't tell a trader holding an offtake position, or a lender sitting behind a borrowing base, whether the physical plant is actually tracking toward that date or whether the "90% mechanical complete" line in the report matches what's standing in the field.

Why the gap matters to financing and offtake

Lenders size debt service coverage and draw schedules around the guaranteed completion date. Traders holding forward cargo commitments size their book around the same number. When the contractor's internal reporting is the only source of truth on progress, everyone downstream is pricing risk off a number the contractor has every incentive to protect. An independent view of module placement, structural steel erection, and unit completion against the calendar gives traders, lenders and EPC counterparties a progress read that doesn't depend on whose EOT claim got approved last month. That's the gap Refinery Progress is built to close, tracking what's physically standing on site month over month against the date the money is counting on.

If you're carrying exposure to a startup date and want a read that isn't filtered through the contractor's own reporting, get in touch and we'll walk you through how the monthly tracking works for your site.