By Adam Hicks, CooperBuild AI · November 11, 2026

Liquidated damages in construction are a fixed dollar amount, usually per calendar day, that the contractor owes the owner for each day the job finishes late past the contract completion date. The amount is agreed when the contract is signed, so nobody has to prove the owner's actual delay losses later. To be enforceable, the rate has to be a reasonable estimate of the owner's real harm, not a penalty.

For a GC, LDs are a schedule risk you price, manage and pass down. This guide covers how they work, when they're enforceable, how they flow to subs, and the records that keep you from paying LDs you don't owe.

#What are liquidated damages in construction?

An LD clause names three things: the completion date (substantial completion on most jobs), the daily rate, and how the days get counted. If the work is late, the owner deducts the LDs from what it owes you, usually from progress payments or retainage.

The federal version is a good plain-English example. FAR clause 52.211-12 says that if the contractor doesn't finish within the contract time, it pays a set amount "for each calendar day of delay until the work is completed or accepted" (FAR 52.211-12 (opens in a new tab)). Private contracts use the same idea with their own wording.

Two terms get mixed up a lot:

• Liquidated damages: pre-agreed, per day, for late completion. The owner doesn't have to prove its loss.
• Actual damages: what late completion really cost, which the owner has to prove. Some contracts waive these for delay when LDs apply; others don't.

LDs also aren't a backcharge. A construction backcharge recovers a specific cost a sub caused. LDs are a schedule remedy with their own clause.

#Are liquidated damages enforceable or just a penalty?

LDs are generally enforceable, but a penalty isn't. Courts in most states follow the test in the Restatement (Second) of Contracts § 356: damages can be liquidated "only at an amount that is reasonable in the light of the anticipated or actual loss caused by the breach and the difficulties of proof of loss," and an unreasonably large amount is unenforceable as a penalty (Cornell LII (opens in a new tab)).

Federal policy says the same thing. FAR 11.501 states that liquidated damages "are not punitive" and that the rate "must be a reasonable forecast of just compensation for the harm" caused by late performance (FAR 11.501 (opens in a new tab)).

What that means in practice: an owner can't pick $5,000 a day just to scare you. The number should tie to real costs of a late finish, like lost rent, extended financing, temporary space or extended design and inspection fees. State law varies, so have a construction attorney read the clause before you sign. This post is general information, not legal advice.

#How are liquidated damages calculated?

The math is simple: days late x daily rate. The fights are about the days.

1. Start from the right date. Is the trigger substantial completion or final completion? It's usually substantial. If you're fuzzy on the difference, see substantial completion vs final completion.
2. Add every approved time extension. Change orders that added days move the date. A construction change order process that always asks for time, not just money, protects you here.
3. Check calendar vs working days. FAR 52.211-12 counts calendar days. Many private contracts do too, but read it.
4. Look for a cap. Some contracts limit total LDs. FAR 11.501 tells contracting officers to use a maximum amount or period when it reflects maximum probable damage.

Example with made-up numbers: substantial completion was due June 1, approved change orders added 10 days, the rate is $750 a day, and you hit substantial completion June 25. You're 14 days late, so LDs are 14 x $750 = $10,500. Without those 10 extension days on paper, it would be $18,000.

#Should a GC accept liquidated damages?

Often you don't have much choice, especially on public work. But you can shape the risk before you sign:

• Price it. Look at the critical path, pick a realistic worst case, and multiply by the rate. Carry that risk in your number or your contingency.
• Get the excusable delays written in. Weather beyond normal, owner-caused delays, late design info, owner-furnished items and permit delays should all add time.
• Ask for a cap. A total LD cap, often tied to a percentage of the contract, limits the worst case.
• Ask for a waiver of consequential damages and make LDs the only remedy for delay. Otherwise you could face LDs and actual delay damages.
• Push back on mid-deal additions. If an owner adds LDs after you priced the job, that's new risk, and it's fair to reprice or change the schedule.

One r/Construction thread from a GC asking about LDs on private work summed up the risk approach: review every schedule pull-in and design-pending item, estimate the worst-case critical path hit, multiply by your LD exposure, and either price it or get time-extension language for late design, market delays and weather (r/Construction (opens in a new tab)).

#Can a GC pass liquidated damages to subcontractors?

Yes, if the subcontract says so. LDs pass down through a flow-down clause that binds the sub to the prime contract, or through an LD clause written directly into the subcontract. If neither is there, it's much harder to charge a sub for owner LDs.

Good practice when you flow LDs down:

• Assess them only against the sub that caused the delay. Spreading LDs across every trade invites claims.
• Show the schedule logic. Be ready to show how that sub's late work drove the critical path and the finish date.
• Follow your own notice rules. If the subcontract requires written delay notice, send it when the delay happens, not at closeout.
• Expect pushback. Subs will negotiate caps and excusable-delay language the same way you did.

Pass-through claims can get messy. ASCE's Legal Brief on a Minnesota case describes an owner pursuing LDs from a subcontractor after taking assignment of the GC's indemnity claim, and the appeals court sending the reasonableness question back to the trial court (ASCE (opens in a new tab)). Get legal advice before you withhold big money.

#What records protect you from liquidated damages?

Most LD disputes are won or lost on paperwork. Keep:

• Daily reports that note weather, manpower, delays and who caused them. Our construction daily report guide covers what to include.
• Written delay notices sent within the contract's notice window, every time.
• Time requests on every change order, even if the owner says "we'll deal with time later."
• Schedule updates that show the critical path before and after each delay. A working 3-week look-ahead schedule helps you spot slips early.
• RFI and submittal logs with dates, so late answers from the design team are on the record.

When the owner assesses LDs, compare their count to your record of approved and requested extensions, then respond in writing.

#How CooperBuild AI helps

CooperBuild AI keeps schedules, change orders, daily reports and job chat in one place, with full accounting built in. Assistants can draft daily reports from project chat for your team to review, and pull action items like "send delay notice to owner" out of job conversations so they don't get lost. Your change orders, schedule updates and delay notices sit in the same system, so your extension history is easy to pull when an LD letter shows up.

If you want to see it on your own jobs, start a free trial.

#FAQ

#What is a typical liquidated damages amount in construction?

There's no standard number. The rate should be a reasonable estimate of what a late finish costs the owner, so it depends on the project: lost rent or revenue, financing, temporary space and extended fees. Federal contracting officers set it per contract under FAR 11.5.

#Are liquidated damages the same as a penalty?

No. Liquidated damages compensate the owner for probable delay losses. A penalty is meant to punish, and courts generally won't enforce an amount that is unreasonably large compared to the anticipated or actual loss.

#Do liquidated damages run until substantial completion or final completion?

It depends on the contract, but most LD clauses run until substantial completion. Read the clause, because some contracts tie LDs to final completion or acceptance.

#Can liquidated damages be taken out of retainage?

Often, yes. Owners commonly deduct assessed LDs from progress payments or retainage if the contract allows withholding. Respond in writing and document your time extensions if you dispute the count.

#Can a subcontractor be charged liquidated damages?

Yes, if the subcontract includes an LD clause or a flow-down clause that binds the sub to the prime contract. The GC should assess them only against the sub whose delay caused the late finish and should be able to show it.