Planning advice for contractors

Cash is the part of the JCT to NEC transition nobody rehearses. Both forms pay on a fixed cycle under the same Act, so the shape looks familiar. Then the detail bites: the contractor's application stops being optional, the pay less window shortens by two days, and clause 50.5 withholds a quarter of the price for work done to date until a compliant programme is submitted. The payment cycle, set side by side.

A compensation event quotation has two limbs, time and money, and the money is the one contractors price worst. This is the guide to the change to the Prices: how it is built from Defined Cost and the Fee under clause 63.1, why your tendered rates usually do not apply, where your overhead and profit actually sit, why the forecast you agree is final, and the handful of points where valid entitlement quietly leaks away in the pricing.

On NEC Options C and D, real cost can still become vulnerable when the accepted programme and the cost record stop telling the same story. This article looks at the hidden commercial fracture between planning and QS records, and why that is where Defined Cost recovery often starts to fail.

A contractor seven months into a £35 million NEC4 contract is financing £4.2 million of working capital. The work is on programme. The technical performance is sound. The cashflow position is not. Three teams diagnose three different causes and none of them identifies what is actually happening.

UK adjudication data records 2,264 referrals between May 2023 and April 2024, with inadequate contract administration identified as the leading cause of disputes at 50 per cent of cases. Behind that figure sits a pattern most experienced commercial directors recognise. Contractors with weak NEC4 programme compliance lose disproportionately on change assessment, on delay narratives, on cashflow timing, and on tender evaluation. The losses are not random.

The dangerous moment for a specialist contractor on an NEC project is not losing the bid. It is winning it. Losing a bid costs nothing but the bid effort. Winning a bid the contractor cannot then administer properly costs the margin the work was supposed to deliver. The specialist mobilises, the team gets on with the work they are good at, the project completes, and the expected profit is not there. The reasons are spread across the project life in small increments nobody fla

A specialist contractor wins an NEC package on the work it can do, and keeps the margin on something else: how the programme, the early warning rhythm and the change record hold up across the job. This is the operating model that decides which, phase by phase.