FIDIC Payment Notices: How Clauses 14.6 and 14.7 Decide When You Actually Get Paid
A FIDIC payment notice is not a single document. It is a sequence of certified gates — application, certificate, payment, and, when the Employer is late, financing charges. Get the sequence wrong and the money sits on the wrong side of someone's ledger for months. This guide walks the full cycle under the 1999 Red Book, flags what changed in the 2017 2nd Edition, and shows how to actually calculate the interest you are owed when payment is late.
What a FIDIC Payment Notice Actually Is
Under FIDIC, the certifying document in the payment cycle is the Interim Payment Certificate (IPC), issued by the Engineer under Clause 14.6. It is the Engineer's certified opinion of what is due to the Contractor for that month. The Employer pays against the IPC. The Contractor does not issue it. The Employer does not issue it. An independent certifier sits between them.
The practical implications are larger than they sound:
- The Engineer's certification is the operative document — not a unilateral notice from either party
- The Contractor's lever is the monthly application under Clause 14.3 — its completeness directly shapes what gets certified
- The Employer's lever is to dispute the Engineer's certification through the contract's dispute resolution path, not to refuse payment
- Disputes about the certified amount run through Clause 20 — Engineer's Determination, DAAB, then arbitration if needed
The chain to keep in mind: Contractor's Statement under 14.3 → Engineer's IPC under 14.6 → Employer's payment under 14.7 → financing charges under 14.8 if payment is late. Each gate has a contractual actor, a contractual deadline, and a contractual consequence for missing it. The rest of this guide walks each one.
Key Takeaway: Under FIDIC, the certifying document is the Engineer's Interim Payment Certificate under Clause 14.6. The Contractor's job is to submit a complete application under 14.3; the Engineer certifies; the Employer pays.
The Three Clauses That Govern Payment
Most payment disputes under FIDIC trace back to one of three clauses. Knowing what each does — and where the boundary between them lies — turns most arguments from theoretical to procedural.
Clause 14.3 — Application for Interim Payment Certificate. The Contractor submits a monthly Statement to the Engineer. The Statement must include the value of work executed, amounts due for materials on-site, Variations, Provisional Sums, retention adjustments, advance payment repayments, and any other amounts the Contractor considers due under the Contract. The Statement is the Contractor's case. Skimping on it is the single most expensive habit in interim payment work.
Clause 14.6 — Issue of Interim Payment Certificate. The Engineer has 28 days from receiving the Statement to issue an IPC certifying the amount the Engineer considers properly due. The IPC must include reasoning where amounts have been deducted from the Statement. The Engineer can certify less than the Contractor applied for, but cannot certify less than what the Engineer genuinely considers due.
Clause 14.7 — Payment. The Employer must pay the certified amount within 56 days of the Engineer receiving the Statement (for interim payments) or 56 days of receiving the Final Payment Certificate. Note the trigger date is the Statement receipt, not the IPC issue — so a late IPC does not extend the payment deadline.
Clause 14.8 — financing charges for late payment — is the enforcement mechanism, and gets its own section below.
Key Takeaway: 14.3 is the Contractor's case. 14.6 is the Engineer's certification. 14.7 is the Employer's payment obligation. 14.8 is what the Contractor is owed when 14.7 slips.
The Timing Chain
The most common error in FIDIC payment timing is reading the 56 days in Clause 14.7 as "56 days after the IPC was issued." It is not. The clock under 14.7 runs from the date the Engineer received the Statement. The 28-day IPC window under 14.6 is not extra time on top — it is part of the same 56 days.
A clean reading of the sequence:
- Day 0 — Contractor submits Statement under Clause 14.3
- Day 28 (latest) — Engineer issues IPC under Clause 14.6
- Day 56 (latest) — Employer pays the certified amount under Clause 14.7
- Day 57 onwards — Financing charges accrue under Clause 14.8
If the Engineer takes the full 28 days, the Employer effectively has 28 days to pay. If the Engineer is quick — say, 14 days — the Employer gets 42 days. The Contractor's leverage is the application, not the certificate.
Two other timing wrinkles matter:
First, the Contract Data or Particular Conditions can change these numbers. Many Middle East and Asia projects extend payment to 84 or even 120 days in the special conditions. Always read the Particular Conditions before you start counting. The 56 days is a default, not a guarantee.
Second, if the Employer fails to pay within 14.7's deadline, the Contractor has a path under Clause 16.1 to suspend the Works after giving 21 days' notice. Suspension is a heavy hammer and almost never the right first move — but it exists, and Employers know it exists. Sometimes its existence alone is enough to free a stuck payment.
Key Takeaway: The 56-day payment clock runs from when the Engineer received the Statement, not from when the IPC was issued. A slow IPC eats into the Employer's payment window — it does not extend it.
What to Include in a Clause 14.3 Application
Clause 14.3 lists the categories an application must cover, but lists are not arguments. A defensible monthly Statement does more than tick the contractual boxes — it presents the Engineer with a clear, measurable, evidence-backed case for the amount being claimed.
A complete application typically contains:
- Estimated contract value of the Works executed — measured to the date of the Statement, by reference to the Bills of Quantities, Schedule of Prices, or measured-work method specified in the Contract
- Amounts to be added and deducted for changes in legislation and changes in cost — where the contract allows price adjustment under Clauses 13.7 and 13.8
- Amounts for Materials on Site — listed individually with values, vesting evidence, and protection arrangements where required
- Amounts for Plant and Materials in transit or at off-site locations — where the Contract permits and vesting can be evidenced
- Variations — itemised by Engineer's instruction, with reference to the Variation Order number and agreed or proposed valuation
- Provisional Sums adjustments — net amounts following expenditure or omission of Provisional Sum work
- Retention adjustments — both retentions held back and retentions released
- Repayments of any advance payment — calculated per the schedule in the Contract
- Other amounts due — claim amounts under any notified Clause 20.1 claims that the Contractor considers ripe for certification
The single most common reason for under-certification is not contractual disagreement — it is that the Engineer cannot see what was claimed or cannot tie the claim to evidence. A measured valuation with five lines of narrative is faster to certify than a single-line lump sum, even if the lump sum is correct.
For Variations specifically, attach the Engineer's instruction reference, the agreed valuation method, and a brief calculation. If the valuation is in dispute, claim the Contractor's position and flag the disputed item — never omit it. Items omitted from a Statement are presumed waived for that period, and trying to recover them in a later Statement creates fresh procedural problems.
Key Takeaway: The application is the Contractor's case. Measure, evidence, and itemise. Anything omitted is presumed waived for that period — claim it now, even if disputed.
When the Engineer Under-Certifies
An IPC that comes in below the application is not, by itself, a contract breach. The Engineer is entitled to certify what they consider properly due. The 1999 Red Book leaves the level of supporting reasoning loose; the 2017 Edition tightens it by requiring "detailed supporting particulars" where amounts are deducted.
The procedural response to under-certification has three steps:
- Request the reasoning in writing. If the IPC arrives with reductions but no explanation, ask for the basis. Under the 2017 Edition this is the Engineer's contractual obligation; under 1999 it is still common practice and a polite request rarely meets resistance.
- Re-claim the under-certified amounts in the next Statement. Under-certification in month one does not waive the underlying entitlement. The Contractor can present the same amounts again in month two, with additional evidence, and the Engineer is required to reconsider.
- If the position holds across multiple Statements, refer the dispute under Clause 20. Persistent under-certification is a dispute about the amount due. It goes through the contract's dispute resolution path — Engineer's Determination under 3.5 (1999) or 3.7 (2017), then the DAAB, then arbitration if needed.
What does not work: refusing to issue further Statements, suspending the Works without the Clause 16.1 procedure, or threatening to walk off-site. Each of those moves shifts the legal narrative from "Employer under-paid" to "Contractor breached." Tribunals are unsympathetic to self-help in payment disputes.
Key Takeaway: Under-certification is a dispute about amount, not a breach. Re-claim in the next Statement, request reasoning, and escalate through Clause 20 — not through site-level pressure.
Computing Financing Charges Under Clause 14.8
Clause 14.8 is the part of the payment framework that contractors most often leave on the table. The entitlement is automatic — no notice is required, no proof of actual financing cost is needed, and the Engineer cannot reduce it for being inconvenient. Yet in many projects the Contractor never claims it, because nobody calculated the number.
The formula under the 1999 Red Book is:
- Rate — 3 percentage points above the discount rate of the central bank in the country of the currency of payment
- Compounding — monthly
- Period — from the date payment was due (under Clause 14.7) until the date payment is actually received
"Currency of payment" matters. If the contract is paid in USD on a project in the UAE, the rate is keyed to the US Federal Reserve discount rate, not the UAE central bank. If payment is split across currencies, financing charges are calculated separately for each currency.
Three practical notes on calculation:
- Take the central bank discount rate as published — most central banks have historical rate data freely available. Pick the rate on the date payment was due, or average across the delay period if the rate changed materially.
- Compound monthly, not daily, unless the Particular Conditions say otherwise. The standard wording specifies monthly compounding.
- Claim financing charges in the next monthly Statement after the late payment is received, under "Other amounts due." Do not wait until the end of the project.
Key Takeaway: Financing charges under Clause 14.8 are automatic, monthly-compounded, and indexed to the central bank rate of the currency of payment. Claim them in the next Statement — most contractors leave them unclaimed.
What Changed in the 2017 Edition
The 2017 2nd Edition keeps the core payment cycle — application, certificate, payment, financing charges — but tightens the procedural exchange around each gate. Three changes are worth knowing if your contract is on the 2017 form:
- Detailed supporting particulars for deductions. Clause 14.6.1 now requires the Engineer to provide reasoning where amounts in the Statement are deducted. The 1999 wording leaves this loose. This is a meaningful contractor-side improvement.
- Engineer can correct previous certificates. Clause 14.6.3 allows the Engineer to correct or modify amounts in earlier IPCs in any subsequent IPC. This works in both directions — it can recover previous over-certifications, but it also gives the Contractor a structured path to recover previous under-certifications.
- Tighter suspension procedure. Clause 16.1 retains the 21-day notice before suspension, but the 2017 Edition adds explicit obligations on both parties during the notice period to attempt resolution. Suspension remains available but is positioned more clearly as a last resort.
Financing charges under 14.8 are substantively unchanged between 1999 and 2017 — same rate formula, same monthly compounding, same automatic entitlement.
Key Takeaway: The 2017 Edition is more procedural but substantively similar. The headline change is that the Engineer must now give detailed reasoning for deductions — useful leverage for the Contractor when challenging under-certification.
Common Mistakes That Cost Contractors Money
Every late or under-paid IPC has a story, and the stories repeat across projects and jurisdictions. The mistakes below cost contractors real money — not because the entitlements were missing, but because the procedural execution failed.
- Submitting incomplete Statements. A Statement missing measurements, attachments, or itemisation invites under-certification. The Engineer cannot certify what cannot be measured or evidenced.
- Confusing the IPC date with the payment trigger date. The 56-day clock under Clause 14.7 runs from Statement receipt, not IPC issue. Counting from the IPC under-estimates the financing-charge entitlement.
- Omitting financing charges from subsequent Statements. The entitlement is automatic. Not claiming it does not preserve the right indefinitely — at some point the omissions start to look like a waiver in tribunal eyes.
- Letting under-certifications accumulate silently. Three months of small under-certifications add up to a large dispute. Re-claim in the next Statement, every Statement, with the same persistence the Engineer uses on the deductions.
- Suspending work without the 21-day Clause 16.1 notice. Self-help is the fastest way to convert an Employer breach into a Contractor breach.
- Not reading the Particular Conditions. The 56-day default is frequently extended in special conditions to 84, 90, or 120 days. Counting on the wrong number invalidates any financing-charge calculation built on top.
Most of these are habits, not knowledge gaps. The contracts team knows the right answer. The system that catches each gate and triggers the right response in the right Statement is what keeps the money flowing.
Key Takeaway: Most lost payment money is procedural, not substantive. Complete Statements, correct counting, persistent re-claiming, and a calculated 14.8 entitlement recover most of it.
Frequently Asked Questions
What is the deadline for the Employer to pay under FIDIC?
Under the 1999 Red Book, the Employer must pay the amount certified in the Interim Payment Certificate within 56 days of the Engineer receiving the Statement and supporting documents from the Contractor. For the Final Payment Certificate, the deadline is 56 days of the Employer receiving the FPC. The 2017 2nd Edition retains 56 days but tightens the documentation gates around it.
How are financing charges calculated for late FIDIC payments?
Under Clause 14.8, financing charges are compounded monthly at an annual rate of 3 percentage points above the discount rate of the central bank in the country of the currency of payment. The Contractor is entitled to these charges automatically — no formal notice is required, and no proof of actual financing cost is needed. The amount runs from the date payment was due until the date the Employer actually pays.
Can the Engineer reduce the amount in an Interim Payment Certificate?
Yes, but only within defined limits. The Engineer can certify less than the Contractor applied for if the supporting evidence does not justify the full amount. The Engineer cannot certify less than what they consider properly due, and the IPC must include reasoning where amounts are deducted. Under the 2017 Edition, the Engineer must give "detailed supporting particulars" for any deduction — a meaningful tightening of the 1999 position.