The FIDIC Payment Clock: 28 Days, 56 Days and What It Does to Your Cash

Clause 14 of the FIDIC Red Book is usually read as administration: here is how you apply, here is how it gets certified, here is when it gets paid. Read instead as a cash flow, it tells you something more useful — how long you fund the job before the job funds you.

The interim cycle

Three sub-clauses, and the day counts matter more than the wording.

• 14.3. The contractor submits a monthly Statement to the Engineer, with supporting documents including a progress report.
• 14.6. The Engineer has 28 days from receiving the Statement and its supporting documentation to issue an Interim Payment Certificate — provided the amount assessed reaches the minimum stated in the Appendix to Tender.
• 14.7. The Employer pays the certified amount within 56 days after the Engineer receives the Statement.

Read 14.7 again, because it is the detail most people get wrong. The payment clock starts when the Engineer receives your Statement — not when the certificate is issued.

That has a consequence worth knowing: an Engineer who takes the full 28 days to certify has consumed half the Employer’s window, not extended yours. Late certification does not push out the payment date. It compresses the Employer’s. Contractors routinely assume the opposite and let a slow certification slide for a fortnight without comment.

What that means in days of cash

Follow a single month of work through.

• Work executed 1 to 31 March
• Statement submitted 5 April
• Interim Payment Certificate due by 3 May
• Payment due by 31 May

Money spent on 2 March arrives on 31 May. Ninety days. And the average pound across that month waits about seventy-five.

Meanwhile wages went out weekly, plant hire monthly, and your subcontractors were paid on whatever terms you agreed — which on most jobs is sooner than you were.

At a spend of 400,000 a month, that cycle means roughly 1,200,000 of your own money is inside the job at any moment, before retention. Reduce it to a single question: can the business carry three months of site spend without the client paying anything? If not, the margin is irrelevant. The job will fail on timing, which is how profitable jobs die.

The minimum amount trap

Sub-clause 14.6 ties certification to a minimum amount set in the Appendix to Tender. Fall below it and there is no Interim Payment Certificate that month.

Not a reduced payment. No payment.

Which bites in exactly the months you can least afford it: a slow winter month, a period waiting on information, the tail of the job after the big packages have finished. The number is agreed at tender, when it reads like boilerplate, and it is worth looking at before signing rather than discovering in month fourteen.

The final account clock is longer than anyone plans for

The end of the job has its own sequence, and it is slow.

• 14.11. Within 56 days of receiving the Performance Certificate, the contractor submits a draft final statement.
• 14.13. Within 28 days of receiving the Final Statement and the written discharge, the Engineer issues the Final Payment Certificate.
• 14.7(c). The Employer pays within 56 days of receiving that certificate.

Note where that sequence begins: the Performance Certificate, which comes at the end of the defects period — itself typically twelve months after completion. So the last of the money can be the better part of two years behind the last of the work, and the second half of your retention sits inside that tail.

This is why retention belongs in the cash flow forecast as a receipt on its own expected date, not as part of the valuation it was deducted from.

Three things to do with this

Model the clock, not the margin

Build the cash flow from the contractual dates rather than from the valuation profile. A forecast that shows March’s work as March’s income is not a forecast; it is the valuation with a different heading.

Submit on a fixed day

Every day you delay the Statement moves the payment date by a day, because the 56 days run from receipt. A Statement that habitually goes in on the 12th rather than the 5th costs a week of cash every month, permanently, for nothing.

Treat an unsupported Statement as not submitted

The 28 days run from receipt of the Statement and its supporting documentation. An application missing its progress report or its substantiation gives the other side a reason to say the clock never started. Completeness is a cash issue, not a tidiness issue.

The point

Clause 14 is not procedure. It is the single largest determinant of how much working capital a FIDIC job demands, and almost all of it is fixed before anyone turns a sod — in the minimum amount, in the payment terms you gave your subcontractors, and in whether your Statement goes in on the fifth or the fifteenth.

Day counts above follow the 1999 Red Book; editions and particular conditions vary, so check the contract in front of you. Practical guidance for commercial teams, not legal advice.