A variation is only worth what reaches the payment claim
On a Hong Kong job the value of instructed change does you no good sitting in a folder. It has to be priced and carried into the payment claim before the statutory clock rewards it.
QScope Team · 7 April 2026 · 6 min read
Variations are where interim value is most often lost, not because the work was not done but because it was not carried into the payment claim in time. Under the Construction Industry Security of Payment Ordinance the claim is what starts the response and payment clock, so a variation left out of the claim is a variation the paying party never has to answer this cycle.
Price it under the contract
Both the HKIA standard form and the government General Conditions of Contract set out how instructed change is valued. The mechanics are familiar to any quantity surveyor: use contract rates where the work is of similar character and condition, adjust rates where it is not, and fall back to fair valuation or dayworks where no rate fits.
- Contract rates first. Where the varied work matches priced items, the schedule rate governs and the argument is short.
- Adjusted rates next. Similar work in different conditions takes the contract rate as a base, adjusted for the change.
- Fair valuation or dayworks last. Where nothing comparable exists, value on a fair basis or on records of labour, plant, and materials.
Get it into the claim
The moment an instruction is valued, it belongs in the next payment claim. Holding variations back for a tidy final reckoning does two things, both bad. It starves cash flow, and it stacks contested value into one large late claim rather than settling it a piece at a time while the facts are fresh.
Records make the valuation stick
The payment response can cut a variation on measurement, rate, or entitlement, and the reasons must be given. Your defence is the record made at the time, the instruction, the marked drawing, the labour allocation, the site measure. There is no VAT or GST in Hong Kong, so the figure is clean, gross equals net, and the whole dispute is about value. That makes contemporaneous records the entire battleground.
The discipline
Log every instruction the day it lands, price it as soon as the scope is clear, and carry the agreed value into the payment claim for that period. The Ordinance does not reward the variation you meant to claim. It rewards the one that was in the claim served on time.
QScope holds every instruction as a priced line and pulls the agreed value straight into the next payment claim, so nothing valued is left behind.