Cash flow forecasting on a Gulf FIDIC job
The FIDIC payment cycle is generous to the employer and hard on the contractor. Fifty-six days from Statement to payment, before retention and before a single late certificate.
QScope Team · 16 July 2026 · 6 min read
A cash flow forecast on a FIDIC project in the Gulf answers one question: on any given date, how much will have come in and how much will have gone out. The difference is what the contractor has to fund, and on a FIDIC job that gap is wider than most first assume, because the payment cycle is long and the retention sits on top of it.
The lag is the point
Under the Red Book the Employer pays within fifty-six days of the Engineer receiving the Statement, and the Engineer has twenty-eight of those days to certify. Value is earned at the valuation date, certified some weeks later, and paid nearly two months after that. Work done in the first week of a month can be waiting on cash into the following month, and that assumes every date is met.
What the naive forecast misses
The common mistake is to take the valuation programme, spread the contract sum along an S-curve, and treat that as the cash flow. Three things are absent, and each is material on a Gulf job.
- The certification and payment lag. Fifty-six days from Statement to payment is the contractual best case. Model it as earned-to-cleared, not earned-as-received.
- Retention. A slice of every certificate is held, up to the limit, and half of it does not return until the end of the Defects Notification Period, a year or more out.
- Advance payment recovery. Where an advance was paid, it is clawed back through deductions on the interim certificates, so the net receipt is below the gross valuation for much of the job.
The peak is the number
Most FIDIC jobs show a widening negative position through the early and middle stages, a peak past the halfway point, and a slow recovery towards Taking-Over. The peak is the funding requirement, and it is the number the forecast exists to produce. The recovery is slower than people expect, because the final certificates are small and the second half of the retention sits months beyond completion.
Reforecast against actuals
A forecast prepared at tender and never revisited is a document, not a tool. Reforecast each month against what actually cleared, and explain the variance. A month where receipts came in short of plan is telling you now what the final account will otherwise tell you in six months, and on a fifty-six day cycle six months is a lot of exposure to carry blind.
QScope derives the cash position from the certificates, the retention and the FIDIC payment dates, so the forecast and the actual come from the same figures and the funding peak is a number rather than a surprise.