Liquidated Damages Calculator
Adjust the LD rate, contractual cap, gross delay, approved extension-of-time days and supporting evidence and observe how net LD days, uncapped LDs, payable LDs and cap headroom respond.
Convert late completion into a transparent, contract-based LD calculation.
The worked example uses a £6.0 million contract, a daily LD rate and a percentage cap. Gross late completion is adjusted for approved extension-of-time days and other contract-recognized exclusions before the LD amount is calculated.
Liquidated Damages Calculator — Step by Step
Eight locked stages move from contract context through the LD mechanism, gross delay, EOT, exclusions, administration readiness, a cap challenge and management review.
Establish the Liquidated Damages Context
Delay Days, LD Value and Contractual Cap
Reveal the contract context to begin.
Calculate the contractual period first; apply the rate second.
Gross delay
Gross delay is the observed lateness against the original requirement. It is only the starting point for the modeled LD calculation.
Approved EOT
An approved extension of time moves the contractual completion requirement and reduces the period of lateness measured against the adjusted date.
Other excluded days
Only use exclusions supported by the contract and facts. Their treatment can vary materially by contract form, governing law and the nature of the delay.
Contractual cap
The cap limits the modeled amount payable under the LD clause. It does not itself validate the clause, determine entitlement, or resolve other contractual remedies.
Net LD Days= max(0, Gross Delay − Approved EOT − Other Contract-Excluded Days).
Uncapped LDs= Net LD Days × Daily LD Rate.
LD Cap= Contract Value × Cap %.
Payable LDs= min(Uncapped LDs, LD Cap).
Important: this is an illustrative learning model, not legal advice or a determination that any LD clause is enforceable. Actual application depends on the contract, governing law, notice, extensions of time, causation, completion provisions and the factual record.
Build Your Own Liquidated Damages Scenario
Experiment Mode is isolated from the guided demonstration. Change all LD, delay, exclusion and readiness assumptions freely.
Quick Knowledge Check
Liquidated Damages Control Cues
Confirm the Obligation
Identify the exact completion milestone or obligation to which the LD clause applies.
Adjust for Valid EOT
Measure lateness against the contractually adjusted completion requirement after valid extensions of time.
Apply Only Supported Exclusions
Exclude delay days only where the contract and factual record support that treatment.
Check the Cap
Compare uncapped LDs with the contractual maximum and identify when the cap becomes binding.
Protect the Record
Maintain notices, completion records, EOT decisions, delay analysis and the contractual basis for the calculation.
Validate Enforceability
Do not assume the arithmetic establishes enforceability. Confirm the clause and applicable legal/contractual requirements separately.
Establish the adjusted completion obligation, identify valid exclusions, calculate the uncapped amount, apply the contractual cap and then test whether the records and administration support the position.