How to Review a Construction Contract: A Step-by-Step Guide for Commercial Teams
Reviewing a construction contract means identifying every commercial risk before you sign, not after a dispute has started. This guide sets out the nine-step process used by experienced commercial teams working with FIDIC, NEC, JCT, and AIA contracts across the UK, UAE, KSA, and USA.
Before You Start: Gather the Full Contract Suite
The most common mistake in construction contract review is reading only the Conditions of Contract. That document does not stand alone. A construction contract is a suite of documents, and the risk is distributed across all of them.
Before reviewing anything, gather every document in the suite:
- Conditions of Contract (the standard form)
- Particular Conditions or Z clauses (the employer's amendments to the standard form)
- Employer's Requirements or Specification
- Bill of Quantities or Schedule of Rates
- Programme
- Insurance Schedule
- Bond and Guarantee documents
- Side letters and pre-contract correspondence
Each of these matters. The Particular Conditions are where risk is transferred from the standard position. The Employer's Requirements define the scope and output specification, which drives variation entitlement. The BoQ establishes the rates used to value variations. The Insurance Schedule determines whether your liability exposure is actually covered. A side letter can override conditions agreed in the main contract.
Reviewing only the Conditions of Contract while missing the Particular Conditions is the equivalent of reviewing a summary rather than the document itself.
Step 1: Identify the Contract Standard and Edition
Before reading a single clause, confirm which standard form you are working with and which edition applies.
FIDIC 1999 and FIDIC 2017 are materially different documents. The 2017 suite introduced a unified claims procedure under Sub-Clause 20.2 that applies to both Employer and Contractor claims, with a 28-day notice period that operates as a strict condition precedent. Under the 1999 Red Book, the equivalent provision is Sub-Clause 20.1, but the procedural detail differs and the consequences of non-compliance are applied differently in practice.
NEC3 and NEC4 are also distinct. NEC4 introduced new payment options and updated the compensation event procedure in ways that affect how time and cost claims are managed.
For JCT, the 2016 and 2024 suites have differences in the payment provisions and dispute resolution procedures. For AIA, the A201 2017 and 2024 editions have updated insurance and indemnity provisions.
Knowing the edition tells you which baseline you are comparing against. If you review a FIDIC 2017 contract assuming 1999 clause references, you will be looking for provisions that are in the wrong place.
Step 2: Read the Particular Conditions or Amendments First
Most contract reviewers start with the General Conditions. The better approach is to read the Particular Conditions first.
The General Conditions represent the balanced standard position negotiated over decades by industry bodies: FIDIC, NEC, JCT, AIA. The Particular Conditions are the employer's modifications to that position. They are where risk is transferred, entitlements are removed, and timelines are extended.
Reading the Particular Conditions first tells you what has changed before you read the standard text. When you then read Clause 14 of the General Conditions, you already know that the Employer has extended the payment period from 56 to 90 days. You are not reading the standard clause assuming it applies. You are reading it knowing how it has been modified.
The pattern is consistent across employers and projects. Particular Conditions shorten notice periods below the standard form position. They extend payment timelines. They cap liability at a lower level than the standard form. They remove contractor entitlements that the standard form grants as a matter of course. They introduce conditions precedent that did not exist in the original.
Read the amendments first. Then read the General Conditions with those changes already in mind.
Step 3: Map the Payment Mechanism
Payment is the highest-risk commercial area in any construction contract. A mistake in the payment clauses costs money on every payment cycle for the life of the project.
Work through each element systematically.
IPC timing. Under FIDIC Red Book Sub-Clause 14.6, the Engineer must issue an Interim Payment Certificate within 28 days of receiving the Contractor's Statement. Check whether the Particular Conditions have extended this period. Extensions to 45 or 60 days are common and represent a direct cash flow cost.
Employer payment period. Sub-Clause 14.7 requires the Employer to pay within 56 days of the Contractor's Statement. This is frequently extended to 90 days in Particular Conditions. Calculate the cash flow impact: a 90-day payment period on monthly valuations means financing three months of work at any given time.
Retention. Sub-Clause 14.9 establishes the standard FIDIC position on retention release: the first half on Taking-Over, the second half on expiry of the Defects Notification Period. Check whether the Particular Conditions have attached additional conditions to release. Conditions tied to issue of a Performance Certificate, submission of as-built documentation, or resolution of outstanding claims can delay retention by months or years beyond the standard position.
For NEC contracts, the payment mechanism is governed by Clause 51. Confirm which payment option applies (Option A through F) and whether the assessment interval and payment period are as expected.
For JCT, Section 4 governs payment. Check the interim valuation dates, the final date for payment, and the pay less notice procedure.
In subcontracts, check for pay-when-paid provisions. Confirm whether the language creates a genuine condition precedent linking payment to upstream receipt of funds, or whether it is a timing mechanism only. The commercial exposure in each case is different.
Step 4: Check the Notice and Claims Procedure
Missed notice deadlines are the most common cause of valid claims being lost. This is not a theoretical risk. It happens on live projects, with experienced teams, on contracts they have reviewed.
Under FIDIC 2017 Sub-Clause 20.2.1, the Contractor must give notice of a claim within 28 days of becoming aware of the event or circumstance giving rise to the claim. This is a condition precedent. Missing the deadline extinguishes the entitlement regardless of whether the underlying claim is valid.
The 28-day clock starts from awareness of the event, not from when the full quantum is known. A variation instructed in month one of a project may cause delay that does not become visible until month four. The notice clock started in month one. A commercial team that waits until the delay is quantified before notifying has missed the deadline.
Check whether the Particular Conditions have shortened the 28-day period. Reductions to 14 or 7 days are not uncommon. Check also whether additional requirements have been attached to the notice: specific addressees, registered post, a particular form or format.
For more detail on the FIDIC Clause 20 notice procedure and the consequences of missing it, see our guide on FIDIC Clause 20 notice requirements.
For NEC contracts, the compensation event procedure is governed by Clause 60 and Clause 61. Under Clause 61.3, the Contractor must notify a compensation event within eight weeks of becoming aware of it, or lose the right to a time and cost adjustment. This is a condition precedent in the same way as FIDIC Clause 20.
For JCT, the loss and expense application procedure under Section 4 requires the Contractor to make written application as soon as it becomes apparent that regular progress is likely to be affected. The application must be made promptly. Delay in application can limit or extinguish entitlement.
Understand whether a notice provision operates as a condition precedent (failure extinguishes the claim) or as a procedural requirement (failure may reduce or delay payment but does not automatically bar the claim). The distinction is material and is often not obvious from the clause wording alone.
Step 5: Review Variation and Change Order Rights
Variations are the commercial engine of a construction project. The terms on which they are valued and administered determine whether the project is profitable.
Start with who has authority to instruct variations. Under standard FIDIC, the Engineer has broad authority under Clause 13.1. Check whether the Particular Conditions have restricted this authority, required Employer co-signature, or limited variation instructions to specific categories of work.
Check the valuation hierarchy. Under FIDIC Clause 13.3, the standard hierarchy moves from BoQ rates to derived rates to daywork to fair valuation. Particular Conditions frequently limit or remove daywork as a valuation method, which removes a key fallback when BoQ rates do not apply.
Check whether the Contractor has a right to object to a variation that fundamentally changes the nature of the works. Check whether a variation quotation procedure applies and whether proceeding without an agreed price creates a risk of the Employer imposing their own rate after the fact.
Confirm that the Contractor's entitlement to both time and money for instructed variations is preserved. Particular Conditions sometimes grant time entitlement but limit cost recovery, or vice versa.
For NEC contracts, the compensation event regime under Clause 60 governs variations. Confirm which Clause 60.1 events apply and whether Z clauses have removed any standard events from the list. The assessment of a compensation event under Clause 63 and 64 is time-critical and involves defined procedures that must be followed.
For JCT contracts, Section 5 governs variations. Check the valuation rules and whether the contract includes a Schedule of Rates that could be used to cap variation rates.
Step 6: Assess Liability and Indemnity Provisions
The liability provisions define the financial ceiling on what each party can recover from the other. Reading them carefully at tender stage is the only time you can negotiate them.
Under FIDIC Sub-Clause 17.6, total liability of each party is limited to the Contract Price, with exceptions for fraud, deliberate default, and death or personal injury. Particular Conditions frequently reduce the cap to a percentage of Contract Price: 50%, 25%, or lower. Some link the cap to insurance policy limits rather than Contract Price, which can be a fraction of the value of the works.
Note what is excluded from the cap. Some Particular Conditions maintain a cap for Contractor claims while introducing uncapped categories for Employer claims. This asymmetry is common and is not always obvious on first reading.
Check the consequential loss exclusion. Most construction contracts exclude indirect and consequential losses. The question is what falls within the exclusion. Loss of revenue and loss of profit are sometimes argued to be direct losses in specific circumstances, depending on the contract wording and the governing law. Flag any consequential loss exclusion that is drafted more broadly than the standard form position.
Check indemnity obligations. Asymmetric indemnities, where one party indemnifies the other beyond the scope of their own acts or omissions, are a material risk and are frequently introduced in Particular Conditions.
For NEC contracts, Clauses 81 to 85 govern liability and insurance. For JCT contracts, Section 6 covers insurance and Section 8 covers termination liabilities.
Check the insurance obligations against what is commercially available and against the subcontract insurance requirements. An insurance schedule that requires coverage terms that cannot be obtained in the market, or that the subcontract does not pass down, creates uninsured exposure.
Step 7: Check Programme and Delay Provisions
The programme is a commercial document as much as a technical one. Its status in the contract determines the Contractor's ability to recover time and money for delay.
Check the liquidated damages rate. In FIDIC contracts under Clause 8, and in JCT contracts under Section 2, liquidated damages apply at a stated rate per day or week of delay. Confirm that the rate is a genuine pre-estimate of the Employer's loss. An inflated LD rate that does not reflect actual anticipated loss may be argued to be a penalty in some jurisdictions, but that argument is uncertain and litigation-dependent. A commercial team that accepts an inflated LD rate without pricing it is carrying risk without compensation.
Check the extension of time mechanism. Confirm what events entitle the Contractor to an extension, how notification works, and how the Engineer or Project Manager assesses the extension. Under NEC Clause 31 to 36, the Accepted Programme is the reference document against which compensation events are assessed. A programme that has not been accepted has limited contractual standing.
Check for acceleration provisions. Some contracts give the Employer a right to instruct acceleration without a corresponding obligation to agree the cost before the acceleration begins. This creates a dispute about the cost of acceleration that is harder to resolve than one about a standard variation.
Check sectional completion and Key Dates. Separate completion dates for different sections of the works carry separate LD exposure. The total LD exposure can exceed what a single completion date would generate. Check that each section is clearly defined and that the programme is capable of meeting each Key Date independently.
Step 8: Cross-Reference Against the Subcontract
If you are reviewing a main contract as a contractor, the review is not complete until you have cross-referenced the key risk provisions against the subcontract you will be placing downstream.
The most common gaps: notice periods in the subcontract are shorter than in the main contract, creating a window where the main contractor is time-barred under the subcontract before the main contract deadline has passed. Liability caps in the subcontract do not mirror the main contract exposure. Insurance requirements are not passed down in full. The payment mechanism is not back-to-back, leaving the main contractor carrying payment timing risk between the two contracts.
These gaps create uninsured exposure that only surfaces during a dispute. Identifying them at tender stage, when the subcontract can still be negotiated, is significantly less expensive than discovering them during a claim.
Step 9: Build a Risk Register
After working through each section, consolidate the findings into a structured risk register. Each entry should include: the clause reference, a plain-English description of the risk, a severity rating (High, Medium, or Low), the estimated commercial impact, and a recommended action (accept, negotiate, price into the tender).
This document serves two purposes. It drives the negotiation: the highest-severity items become the priority points to push back on before contract execution. It also becomes the record of what was reviewed and what was accepted, which is important if a dispute arises later and the question of what was known at contract signing becomes relevant.
How AI Changes the Construction Contract Review Process
AI does not replace the nine-step process above. It accelerates and systematises the most time-consuming part: the clause-by-clause comparison against the standard form.
A commercial manager reviewing a 100-page FIDIC contract by hand spends most of their time reading standard clauses that have not been changed, looking for the modifications that have. AI handles that comparison automatically. It reads every clause, identifies every deviation from the standard form, and surfaces the flagged provisions for human review. The commercial team then applies judgment to the flags: whether to accept, negotiate, or price the risk.
Lexilio, our construction commercial intelligence platform, reviews FIDIC, NEC, JCT, and AIA contracts and returns a structured risk report in under 2 minutes. It covers Particular Conditions analysis, cross-document conflict detection between main contracts and subcontracts, and extraction of every obligation and deadline from the contract suite. For teams working on FIDIC contracts in UAE and KSA, NEC contracts in the UK, or AIA projects in the US, the same platform handles the full portfolio. For a comparison of how this approach differs from other tools on the market, see how Lexilio compares to other tools.
Construction Contract Review Checklist
- Gather the full contract suite before starting (Conditions, Particular Conditions, BoQ, Spec, Insurance Schedule, side letters)
- Confirm the contract standard and edition (FIDIC 1999 or 2017, NEC3 or NEC4, JCT 2016 or 2024, AIA 2017 or 2024)
- Read the Particular Conditions or Z clauses before the General Conditions
- Map the payment mechanism: IPC timing, payment period, retention conditions
- Check all notice and claims deadlines: confirm whether each is a condition precedent
- Review variation rights: valuation hierarchy, right to object, time entitlement
- Assess liability cap level, consequential loss exclusion, and indemnity scope
- Check LD rate, extension of time triggers, programme status, and sectional completion
- Cross-reference main contract risk provisions against the subcontract
- Build a risk register with clause references, severity ratings, and recommended actions
Frequently Asked Questions
How long does it take to review a construction contract?
A thorough manual review of a standard FIDIC subcontract, including Particular Conditions and key appendices, takes an experienced commercial manager 3 to 5 hours. A full main contract with Employer's Requirements and a substantial BoQ can take a full working day. Using an AI tool like Lexilio to run the initial clause comparison reduces this to under 2 minutes for the automated analysis, with the commercial manager then spending 30 to 60 minutes reviewing the flagged provisions and building the risk register.
What should I look for when reviewing a FIDIC contract?
The highest-priority items in a FIDIC contract review are: the Clause 20 notice period and whether it has been shortened in the Particular Conditions, the payment timeline under Sub-Clauses 14.6 and 14.7 and whether it has been extended, the retention release conditions under Sub-Clause 14.9, the liability cap under Sub-Clause 17.6 and whether it has been reduced below Contract Price, and the variation valuation mechanism under Clause 13 and whether daywork has been removed.
What is the most important clause in a construction contract?
For contractors, Clause 20 in FIDIC (the claims and notice procedure) carries the highest commercial risk because it is a condition precedent: missing the 28-day notice deadline extinguishes the claim regardless of its merit. Payment provisions are a close second because of their compounding effect on cash flow across the full project duration. Both are more commercially significant than liability caps, which only crystallise in a dispute.
Can AI review construction contracts accurately?
Yes, for tools trained specifically on construction contract standards. General-purpose AI applied to a FIDIC contract produces generic output that misses construction-specific risk patterns. Tools trained on FIDIC, NEC, JCT, and AIA, such as Lexilio, identify deviations from the standard clause structure and explain their commercial implications with accuracy that reflects genuine domain knowledge. The limitation is that AI reviews the document in isolation: it does not know the project context, the counterparty's history, or the governing law interpretation in a specific jurisdiction. Human judgment remains essential for those elements.
What is the difference between reviewing a main contract and a subcontract?
A main contract review focuses on the relationship between the Employer and the Contractor. A subcontract review adds a second layer: not only does the subcontract need to be reviewed on its own terms, but it also needs to be cross-referenced against the main contract to identify back-to-back misalignments. Notice periods, liability caps, insurance requirements, and payment terms must all flow down from the main contract to the subcontract in a way that does not create gaps. A main contractor who accepts a 28-day Clause 20 notice period under the main contract but allows only 14 days in the subcontract carries the risk of a Clause 20 claim that is time-barred downstream before the main contract deadline has passed.
Lexilio is the construction commercial intelligence platform for FIDIC, NEC, JCT, and AIA contracts.
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Lexilio is the construction commercial intelligence platform. It extracts every obligation, deadline, and conflict from your full contract suite automatically. Available for FIDIC, NEC, JCT, and AIA contracts across UK, UAE, KSA, and USA.
