1. Where the standard conditions sit in the hierarchy
The standard conditions are a contractual reference document. They apply only to contracts that expressly refer to them (order of 30 March 2021, art. 1; standard conditions, art. 1.1). They are subsidiary: where the particular conditions contradict them, the particular conditions prevail. That is why adaptations are made through the particular conditions: each departure states which article of the standard conditions it departs from, and the last article of the particular conditions gives the summary list of those articles (standard conditions, art. 1.2).
The hierarchy of contract documents runs from the form of tender, through the particular administrative conditions, the technical specification, the standard conditions, the priced bill and the pricing schedule. Where two documents contradict each other, the higher-ranking one prevails. The economist has to ensure that the financial data, prices, adjustment, variation thresholds, are consistent between the particular conditions, the specification and the pricing schedule.
ℹ How to incorporate the standard conditions The particular conditions must contain an incorporation clause reading, in substance: the provisions of the standard conditions for public works contracts approved by the order of 30 March 2021 apply to this contract, save for the departures and adaptations set out in the following articles. Without that clause the standard conditions do not apply automatically, and buyer and contractor are in a contractual vacuum on everything the particular conditions do not cover. It is a drafting error with serious consequences in a dispute.
2. The economic clauses, article by article
| Article | Subject | Key economic content | Adapt in the particular conditions? |
|---|---|---|---|
| Art. 9 | The contract price | The forms of price, fixed or adjustable, and how updating works | No |
| Art. 14 and 15 | Increase and decrease in the value of the works | Beyond the increase limit (5 % of the contract amount on lump-sum prices, 25 % on unit prices) or the decrease limit (5 % on lump-sum prices, 20 % on unit prices), the contractor can be compensated for its loss (art. 14.3 and 15.1); it can refuse work arising from changes in requirements beyond one tenth of the contract amount (art. 14.2.2). These are not caps on modifications to the contract. | Yes |
| Art. 13 | Prices of additional or varied work | New rates built up from the contract's price breakdowns and build-ups (13.3), set provisionally by instruction and settled by the design team with the buyer's agreement, after consulting the contractor (13.4); the contractor has thirty days to submit its observations, failing which it is deemed to accept those rates (13.5) | Yes |
| Procurement code, R2192-31 to R2192-36 | Interest on late payment | Interest runs automatically once the 30-day period is exceeded, at the rate applied by the European Central Bank to its most recent main refinancing operations, in force on the first day of the half-year in which the interest began to run, plus eight points (procurement code, R2192-31), plus a fixed indemnity of 40 euros for recovery costs (D2192-35); the standard conditions mention such interest without setting its rules | No |
| Art. 10.1 | Advance payment | Compulsory above 50 000 € excluding VAT where the contract runs more than two months (procurement code, R2191-3), at a rate of at least 5 % of the original amount including VAT for a contract of twelve months or less, or of a sum equal to twelve times that amount divided by the duration in months beyond that (R2191-7, in force since 1 January 2025); the minimum rate is raised, where the contractor is an SME, to 30 % on State contracts and to 10 % on those of certain public bodies and local authorities | Yes |
| CCP, R2191-32 to R2191-35 | Retention | At most 5 % of the original value plus the variations (R2191-33), withheld from the payments on account and the balance (R2191-34), repaid within thirty days of the end of the guarantee period, or of the clearing of snags still outstanding at that date (R2191-35); the CCAG shows it in each payment statement (art. 12.2.1, h) | Yes |
| Art. 12 | Valuations (12.1 and 12.2), final statement (12.3) and final account (12.4) | Monthly accounts, interim valuations and the final account | Yes |
| Art. 41 to 44 | Completion and warranties | Completion with or without snags (art. 41), and a one-year guarantee period from the date on which completion takes effect, during which the contractor is bound by the making-good obligation (art. 44.1); the two-year and ten-year warranties derive from the Civil Code, not from the standard conditions | No |
| Art. 50.3 | Termination for contractor default | Prior formal notice, except in the cases at g, i, k and l of art. 50.3.1, setting a period for performance whose minimum length the standard conditions do not fix, with an invitation to submit observations (art. 50.3.2); termination either simple or, in the case at c of art. 50.3.1, at the contractor's cost and risk (art. 52.4 to 52.7) | Yes |
| Art. 50.4 | Termination at the buyer's convenience | Termination for convenience, with the contractor compensated for costs incurred and profit lost | Yes |
The three to keep uppermost, additional work, interest on late payment, and the valuation and final account articles, are the ones that generate most litigation. The interest article is mandatory law and applies even where the particular conditions are silent. The other two have to be adapted in the particular conditions to be workable.
3. The payment circuit
Payment on a public works contract is more formalised than on a private one. It runs in five regulated steps, and failing them triggers interest.
Step 1, the monthly valuation: the contractor prepares its interim valuation at the end of the month, listing the work executed, valued at the scheduled rates, together with the price adjustment for the period.
Step 2, verification by the design team: the design team checks the valuation within the period set in the particular conditions, ten days being the recommended figure, corrects it where necessary and issues the payment certificate.
Step 3, the certificate that the work has been done: the buyer's representative issues the administrative certificate attesting that the work has actually been carried out. Without it, the public accountant cannot pay.
Step 4, the payment order: the public accountant checks the formal regularity and pays. The statutory 30 days run from receipt of the payment request.
Step 5, payment or interest: if payment does not arrive within 30 days, interest runs automatically at the statutory rate plus eight points, with no formal demand needed.
ℹ The 30 days: who is watching them? The 30-day period runs across the whole chain: the design team verifying the valuation, the buyer issuing the certificate, and the accountant paying. If the design team takes 15 days to verify, only 15 remain for everyone else. The economist has to watch their own turnaround and warn the buyer of any delay that risks triggering interest, liability for which can run back to the design team where the delay is attributable to it.
4. The final account: how public differs from private
The final account on a public contract follows a procedure strictly framed by the standard conditions. The deadlines and the consequences of missing them differ from private practice.
Drawn up by the design team: within 30 days of completion, or the period set in the particular conditions.
Signed by the contractor: 30 days to return the final account signed, with or without objections, or to give the reasons for its refusal (art. 12.4.3), failing which it is deemed accepted (art. 12.4.5).
The contractor's objections: must be reasoned and quantified. A general, unquantified objection is inadmissible.
Challenge: where disagreement persists, the contractor can refer the matter to the amicable settlement committee before any litigation. That step is compulsory on State contracts.
Limitation: five years from notification of the account, within which the contractor can challenge it before the administrative court.
5. The seven essential adaptations
| Clause | Article concerned | Recommended wording, in substance | Risk if absent |
|---|---|---|---|
| The variation threshold | Art. 13 | Any additional or varied work above a stated amount requires a variation signed before execution; below it, a written instruction suffices. This is a management rule specific to the contract, not a limit on modifications: the limits on modifications to the contract are those of the code (R2194-1 to R2194-9, in force since 1 April 2019). The clause departs from art. 13 (provisional rates set by instruction, final rates settled by variation) and is therefore listed among the departures in the last article of the particular conditions (art. 1.2). | Work carried out with no contractual basis, and a dispute at final account |
| The basis of valuation | Art. 13 | Valuation is made in order of priority on the pricing schedule, then the schedule of rates, then a new rate on net cost plus a stated percentage | The contractor applies its own prices and cannot be challenged |
| The daywork coefficient | Art. 13 | The overhead and profit coefficient applicable to daywork is fixed at a stated figure | An undefined coefficient means whatever the contractor claims |
| The final account period | Art. 12 | The account is drawn up by the design team within 30 days of completion, and the contractor has 15 days to sign or object | A late account means a dispute over limitation and possible interest |
| The advance and its repayment | Art. 10.1 | The advance is 5 % of the original amount including VAT, repaid by deduction from the monthly payments once the work executed reaches a stated proportion. The 5 % rate is the minimum set by the code, raised, where the contractor is an SME, to 30 % on State contracts and to 10 % on those of certain public bodies and local authorities (R2191-7, in force since 1 January 2025); where the contract is silent, repayment of an advance of 30 % or less begins at a threshold of 65 % (R2191-11, in force since 1 January 2026). | Repayment uncertain and cash flow disrupted |
| The formal notice period | Art. 50.3 | The formal notice is given in writing with acknowledgement, and the contractor has 15 days from notification to comply | A fragile termination procedure, challenged on the periods |
| Partial completion by package | Art. 42 | Completion may be certified package by package, with the warranties running from the completion date of the package concerned | Without it, one package finishing early blocks the process |
In summary
The standard conditions apply as soon as the particular conditions refer to them; without that clause they do not apply at all. The fundamental economic clauses cover price, variation in the volume of work with a 20 % threshold, additional work with the valuation hierarchy and a 30-day pricing period, daywork, interest as mandatory law, the advance at a minimum rate of 5 % set by the code (R2191-7), retention of at most 5 % (procurement code, R2191-32 to R2191-35), valuations and the final account, and completion and warranties. The seven essential adaptations are the variation threshold, the basis of valuation, the daywork coefficient, the final account period, the advance repayment, the formal notice period, and partial completion by package.
The nature of the figures quoted
Amounts and rates set by a text are quoted with their article and date. The other percentages and amounts on this page, dated reference points or a fictitious example, are orders of magnitude for framing, not measurements: they substitute neither for a tender exercise nor for an estimate prepared on drawings.
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Sources: the BT construction cost indices published monthly by INSEE on its 2010 base, used to update the figures · construction cost statistics from SDES, the statistical service of the ministry responsible for construction · regulatory texts published in the Journal officiel and consolidated on Légifrance for the requirements cited.