Hong Kong Edition compensation events: what changes from standard NEC4
By Roman Bazelchuk | NEC Accredited Project Manager | APMG Project Planning and Control
Founder, NEC Planning Solutions Ltd
Most guidance on NEC4 compensation events is written for the standard contract used in the UK. On a Hong Kong government contract most of it still applies. Where it does not, the difference sits in a few Hong Kong Edition clauses and in the Development Bureau's Additional Conditions. Those decide whether a typhoon brings money as well as time, and how long you wait for a reply.
Hong Kong Edition compensation events follow the NEC4 procedure and its eight-week notification bar. What changes is which events count and what they pay. Weather turns on Hong Kong Observatory warnings, labour shortage becomes an event, and on government contracts several events move the dates but not the Prices, while replies can take six weeks.
The Development Bureau (DEVB) said in June 2026 that more than 850 public works contracts worth over HK$550 billion have used NEC, and the Airport Authority and the MTR Corporation use it too. Under a Secretary for Development memo of November 2023, the NEC ECC Hong Kong Edition is mandatory for NEC ECC works contracts tendered from 1 July 2024, and DEVB announced in November 2024 that NEC would become mandatory on all public works contracts and consultancies above the quotation limit from the fourth quarter of 2026.
Teams trained on the UK form expect the compensation event procedure they know, and mostly they get it. Notification, the instruction to quote, the three-week quotation, assessment and implementation all run as in the standard form. The differences sit in three layers: the text of the Hong Kong Edition itself, DEVB's library of standard Additional Conditions of Contract, which government contracts carry as Z clauses, and the choices made in each contract's Contract Data. The programme side of the same edition is covered in Hong Kong NEC4 ECC: programme compliance under the 2023 bespoke edition.
This guide sets the Hong Kong rules against the standard form, event by event and period by period, and ends with the route a disputed event now takes to adjudication. The standard clock is set out in the NEC4 compensation event time bar: clauses 61 and 62, and how the money in a quotation is built in the compensation event quotation guide.
How Hong Kong Edition compensation events differ from NEC4
The Hong Kong Edition was launched in July 2023, prepared by NEC jointly with DEVB, and BCLP counts about a hundred edits to the NEC4 ECC in total. For compensation events, the edition changes the list of events in clause 60.1, the quantity threshold in clause 60.4, changes in law under Option X2 and Defined Cost on Options A and B. On government contracts, DEVB's standard Additional Conditions then add events that move the dates but not the Prices, and longer reply periods. The table sets each against the standard form.
Standard NEC4 ECC | Hong Kong Edition on a government contract | |
Weather, 60.1(13) | A weather measurement at a stated place, shown to occur on average less than once in ten years | Tropical cyclone signal No. 8 or above, a black, red or amber rainstorm warning, or an additional weather condition, which DEVB's template sets as inclement weather |
Shortage of labour | Not a compensation event | A compensation event under the new clause 60.1(21), judged at the tender closing date |
Physical conditions and prevention, 60.1(12) and 60.1(19) | Judged at the Contract Date | Judged at the tender closing date |
Changes in law, Option X2 | Any change in the law of the country of the Site after the Contract Date | Only enactments listed in the contract, from a Reference Date ten days before the tender closing date |
Events that move the dates but not the Prices | None | Options A and B: 60.1(5), weather, prevention and labour shortage. Options C and D: the same, except signal No. 8 and black and red rainstorms |
Reply to a notified event, 61.4 | One week | Three weeks, or six where the Client must confirm no objection |
Reply to a quotation, 62.3 | Two weeks | Three weeks, or six where the Client must confirm no objection |
Notification bar, 61.3 | Eight weeks | Eight weeks |
Defined Cost, Options A and B | People Rates and other rates tendered in the Contract Data | Actual cost at open market or competitively tendered prices. The People Rates and tendered rates are removed |
Quantity changes, Options B and D, 60.4 | Threshold of 0.5% of the total of the Prices | The greater of 0.5% and a stated compensation amount, HK$1,000,000 in DEVB's template |
Disputes | Option W1, W2 or W3 | Option W4 only: Project Manager, mediation and arbitration, with payment disputes open to adjudication |
Two cautions apply. The Additional Conditions are a standard library, so a contract can depart from them, and contracts let before the Hong Kong Edition may still run on NEC3, or on NEC4 with DEVB's earlier amendments. Contracts with the MTR Corporation and the Airport Authority follow their own terms: MTR's form, for one, limits weather to signal No. 8 and black rainstorms, with time only.
Weather: warning signals instead of ten-year statistics
Standard NEC4 treats weather as statistics. Clause 60.1(13) compares a weather measurement recorded at a place named in the Contract Data with the weather data, and only weather shown to occur on average less than once in ten years is a compensation event. Proving it takes a station's records and an argument about return periods.
The Hong Kong Edition replaces the test with signals anyone can look up. The event is one of a list of weather conditions, or its consequences, affecting the Site: the hoisting of tropical cyclone warning signal No. 8 or above, a black, red or amber rainstorm warning, or an additional weather condition stated in the contract. The Hong Kong Observatory issues the warnings, and its amber, red and black rainstorm signals describe rain falling generally over Hong Kong at more than 30, 50 and 70 millimetres in an hour. They are territory-wide, so the event turns on the warning and its consequences for the Site, not on a gauge at the gate. DEVB's Contract Data template fills the additional slot with inclement weather, a term to check in the contract in hand.
The money depends on the main Option. Under the standard Additional Conditions, a weather event on an Option A or B contract gives time only: the dates can move, the Prices cannot, and the quotation leaves out any change to the Prices. On Options C and D the severe events, signal No. 8 and black and red rainstorms, change the Prices as well, while amber rainstorms and the additional weather condition move the dates but not the Prices. DEVB's practice notes put weather compensation events at 2% to 4% of the original target cost.
For the programme, the line between weather that counts and weather that does not is now drawn by the Observatory. Weather that meets none of the listed conditions is the Contractor's risk, so the time risk allowance should carry it, as time risk allowance in NEC: what counts as reasonable explains. DEVB's library also carries optional weather clauses that narrow the event further, so read the Additional Conditions before pricing any weather risk.
Labour shortage and the tender closing date
The Hong Kong Edition adds an event the standard form does not have. Under the new clause 60.1(21), a shortage of labour is a compensation event if it would have been unreasonable for an experienced contractor to have allowed for it at the tender closing date. The test mirrors physical conditions and prevention: the question is what an experienced contractor would have priced, not what later happened. Under the standard Additional Conditions it moves the dates but not the Prices, on Options A to D.
The same date moves in two older events. For physical conditions under clause 60.1(12) and prevention events under clause 60.1(19), the standard form asks what an experienced contractor would have judged at the Contract Date. The Hong Kong Edition asks at the tender closing date, when the price was set. Changes in law follow: Option X2 covers only the enactments listed in the contract, measured from a Reference Date ten days before the tender closing date.
DEVB's Contract Data template adds two events of its own. Where a contract depends on MTR possessions, a change by MTRCL, the MTR Corporation, to the start or length of a Restriction, Possession or Isolation stated in the Scope or agreed with it is a compensation event. So is a suspension or slowing of work by the Contractor under the security of payment provisions, which matters when an admitted or adjudicated amount goes unpaid.
Events that move the dates but not the Prices
The NEC principle is that a compensation event is assessed for its effect on both the Prices and the dates. DEVB's practice notes say that default time and money entitlement "may be adopted if appropriate, except for events such as weather events (excluding severe weather events for Options C and D), utility interference, prevention events, shortage of labour, etc." The standard Additional Conditions write the exceptions into clause 63.6. On Options A and B, events under clauses 60.1(5), 60.1(13), 60.1(19) and 60.1(21) give the Contractor no right to changes to the Prices. On Options C and D the list is the same, except that signal No. 8 and black and red rainstorms still change the Prices.
Clause 60.1(5) is an easy event to miss. It covers the Client or Others not working within the times shown on the Accepted Programme or the conditions stated in the Scope, or carrying out work on the Site that is not in the Scope. DEVB's notes list utility interference among the time-only events and describe utilities and interfaces as "a common source of compensation events and disputes if not properly addressed". On a government contract, a utility undertaker that misses its slot moves the dates but not the Prices.
Two consequences follow. A quotation for one of these events still matters, because it carries the delay to the Completion Date and Key Dates and the alterations to the Accepted Programme, but under the amended clause 62.2 it excludes proposed changes to the Prices. And the cost has to be allowed for at tender. On Options A and B the Contractor bears it. On Options C and D it is paid as Defined Cost, but the target does not move, so it comes out of the Contractor's share.
Reply periods: three weeks, or six when the Client must confirm
The standard form keeps the Project Manager quick. Under clause 61.4 it replies to a notified event within one week, or a longer period the Contractor agrees, and under clause 62.3 it replies to a quotation within two weeks. The Contractor's three weeks to submit a quotation are unchanged in Hong Kong, and so is the eight-week bar in clause 61.3. The Civil Engineering and Development Department (CEDD) reminds its own teams in its NEC playbook that an event early-warned but not notified as a compensation event within eight weeks is time barred, subject to the clause 61.3 exception for events arising from the Project Manager's or the Supervisor's own instruction, notification, certificate or changed decision.
DEVB's standard Additional Conditions lengthen both replies. The Project Manager replies within three weeks, or within six where the Client's confirmation of no objection is needed. The same conditions require that confirmation before the Project Manager takes any action that may commit the Client to a change in the Prices estimated to exceed HK$1.4 million, and the Contract Data template repeats the split: six weeks for events needing the Client's confirmation, three weeks for the rest.
Added up, the gap is wide. Under the standard form, if every party uses its full period, an event reaches the Project Manager's reply on its quotation six weeks after notification: one week to reply, three to quote, two to respond. On a government contract, an event that needs the Client's confirmation takes fifteen weeks on the same path. That is three and a half months of change sitting outside the Prices, which the payment cycle, the cash flow forecast and the programme all have to carry.
The programme can carry it. NEC4's clause 32.1 dropped NEC3's reference to implemented compensation events, so the next clause 32 revision can show an event still waiting for its reply. Once that revision is accepted, it becomes the Accepted Programme against which later events are assessed.
Defined Cost on Options A and B: actual cost, not rates
Options A and B normally assess compensation events with the Short Schedule of Cost Components, which prices people at the People Rates and Equipment, manufacture and design at rates tendered in the Contract Data. The Hong Kong Edition removes the People Rates. NEC's own comparison of the two forms says people under Options A and B are costed as under the other main Options, at actual cost, "subject to it being demonstrated they represent open market or competitively tendered prices".
The rest of the schedule follows. Equipment loses its published list and tendered rates and is costed at competitively tendered or open market rates. Manufacture and fabrication, and design, lose their tendered rates and move to actual cost on the same test. Pension costs, including contributions under the Mandatory Provident Fund Schemes Ordinance, are excluded from the cost of people.
For the Contractor this is a records question before it is a pricing one. An Option A or B quotation built on the old schedule rates has nothing in the Hong Kong Short Schedule to rest on, unless the parties agree rates. One built on payroll, invoices and hire records, with evidence that each rate matches the market or a competitive tender, does. Read the contract's own Short Schedule of Cost Components before the first quotation goes in. How Defined Cost recovery breaks down on the target cost Options is covered in the QS-planner bridge.
One smaller change affects the Options with a bill of quantities. Under Options B and D, a change in a billed quantity becomes a compensation event only for items above a threshold, which the standard form sets at 0.5% of the total of the Prices at the Contract Date. The Hong Kong Edition makes it the greater of that figure and a stated compensation amount, which DEVB's template sets at HK$1,000,000. On a contract whose Prices exceed HK$200 million the 0.5% figure is already the larger, so the change makes no difference.
When a compensation event becomes a payment dispute
The Hong Kong Edition has one dispute resolution Option, W4, and none of W1, W2 or W3. A dispute goes first to the Project Manager, which notifies its decision within four weeks. A party can then refer it to mediation within four weeks, and to arbitration under the Arbitration Ordinance within thirteen weeks of mediation failing, being refused or not being started. For a payment dispute, the Contractor can choose adjudication under the security of payment provisions instead of the Project Manager's decision.
Which provisions apply depends on when the contract was made. Public works contracts tendered from 31 December 2021 (Group B and C contractors) or 1 April 2022 (others), and awarded before 28 August 2025, use DEVB's contractual provisions under Technical Circular (Works) No. 6/2021. From 28 August 2025, the Construction Industry Security of Payment Ordinance (Cap. 652) applies to new public and private contracts of at least HK$5 million for construction work, or HK$0.5 million for related goods and services, and to the subcontracts under them. Its periods are short: a payment response within 30 days of a payment claim, payment within 60 days, and an adjudicator's determination within 55 working days of appointment.
The gateway is the compensation event procedure itself. Under section 23(4) of the Ordinance, a claim for additional payment becomes a payment dispute only when an assessment has been made under the contract's procedure, or none has been made within the period for it or within a reasonable period. DEVB's circular takes a similar line for NEC contracts: the procedure runs until the Project Manager has, or should have, notified its decision under clause 61.4 or, otherwise, until the event is implemented. A compensation event cannot jump the queue. But a Project Manager who lets the reply periods lapse opens the door to adjudication.
Time is open to adjudication as well. On public contracts an adjudicator can decide a payment dispute that turns on an extension of time. On private main contracts and their subcontracts, section 57 bars that unless the extension has been agreed. On public works, that makes the programme evidence behind a compensation event part of the payment case from the day the event is notified.
Where Hong Kong compensation events go wrong
The government's own teams have written down the failures. CEDD's NEC playbook for construction, issued in April 2025, says contractors "notify too many CEs without sufficient supporting documents and elaborations", leaving the Project Manager to check the records and, sometimes, to seek the Client's view, which makes the timeframes difficult to meet. It finds contractors "often confused about the dividing date" and submitting poor-quality quotations, and assessments that may take the actual Defined Cost approach "even if a forecast approach should be adopted".
Each failure has a direct fix. A notification that carries the clause, the records and the likely effect gives the Project Manager something it can decide within the period. A quotation built around the dividing date uses actual Defined Cost for work done before it and forecast Defined Cost for work after it, as clause 63.1 requires, instead of waiting for the work to finish and the invoices to arrive. Both faults are cheaper to fix before submission than after, which is the case for an independent CE assessment on any large event.
Waiting is the trap on both sides. Pinsent Masons, writing on Hong Kong NEC forms, notes that "project managers are tempted to delay assessment until all varied works are completed and all costs are incurred". A retrospective assessment feels safer, but it is not what the contract asks for, and on a contract under Cap. 652 an assessment that never arrives is a route to adjudication. Where the Project Manager does assess an event itself, clause 64 sets out when it must and what it uses.
The author's view
For a contractor used to the UK form, the bigger change is who pays for time. On a government contract, an amber rainstorm, a utility undertaker that misses its slot or a shortage of labour can move the Completion Date without changing the Prices. The later date stops delay damages, but the cost of the lost days stays out of the Prices. That money has to be found at tender. The programme's job is to keep weather-sensitive work out of the wettest months where the sequence allows, and to size the time risk allowance for rain that stays below a warning.
The other cost is the wait. Fifteen weeks from notification to a reply on the quotation, for any event large enough to need the Client's confirmation, is a long time for change to sit outside the Prices. Three habits carry a contractor through it. Notify with evidence, so the clock is not spent on requests for information. Put pending events into the next revised programme rather than waiting for implementation. And treat every quotation as the first exhibit in an adjudication, because under Cap. 652 it may become one.
None of this is new discipline. On one NEC3 Option A job, monthly clause 32 submissions with compensation events built in as they arose kept the accepted programme intact through to Completion. The same habits travel to Hong Kong unchanged. What changes is the reading. Three documents decide a Hong Kong compensation event, the edition, DEVB's Additional Conditions and the Contract Data, and the summaries in circulation do not always agree. The contract in hand is the only safe source.
Frequently asked questions
Is a typhoon signal No. 8 a compensation event in Hong Kong?
Yes, unless the contract adopts one of the Development Bureau's optional weather clauses that exclude it. Clause 60.1(13) of the Hong Kong Edition includes the hoisting of tropical cyclone warning signal No. 8 or above, alongside black, red and amber rainstorm warnings. The Bureau's standard Additional Conditions make it time only under Options A and B. Under Options C and D it changes the Prices too.
How long does the Project Manager have to reply on a Hong Kong government contract?
Under the Development Bureau's standard Additional Conditions, the Project Manager replies to a notified compensation event within three weeks and to a quotation within three weeks, or six weeks in either case where the Client's confirmation of no objection is needed. That confirmation applies to actions that may change the Prices by more than HK$1.4 million. Standard NEC4 gives one week and two weeks.
Is a shortage of labour a compensation event under the Hong Kong Edition?
Yes. The Hong Kong Edition adds clause 60.1(21): a shortage of labour is a compensation event if it would have been unreasonable for an experienced contractor to have allowed for it at the tender closing date. The standard NEC4 ECC has no such event. Under the Development Bureau's standard Additional Conditions it gives time only, with no change to the Prices.
Can a compensation event dispute go to adjudication in Hong Kong?
Yes, as a payment dispute, once the contract's procedure has run. Under section 23(4) of the Construction Industry Security of Payment Ordinance (Cap. 652), a claim becomes a payment dispute when it has been assessed, or when no assessment was made within the required or a reasonable period. The Ordinance covers contracts made from 28 August 2025, and the adjudicator decides within 55 working days.
About the author
Roman Bazelchuk is the Founder of NEC Planning Solutions Ltd, a UK project planning and controls consultancy supporting contractors with NEC programme compliance, compensation event assessments and live project controls. He is an NEC Accredited Project Manager and holds the APMG Project Planning and Control qualification, with a BEng in Mechanical Engineering and postgraduate training in Planning and Control.
NEC Planning Solutions provides contract-aware planning support through a QA-governed delivery model, helping project teams keep programmes accepted, current and commercially useful from tender through to live delivery.
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