Public procurement and performance · France and Switzerland : separate country-labelled rules
5 checks for a contract price-indexation formula
Price-adjustment checking starts with the formula incorporated into the contract, not a universal inflation percentage. France and Switzerland require the relevant contract, index series, periods and rounding rules. Enter documented base and revised values and keep the calculation visible. The worksheet checks arithmetic within stated assumptions; it does not invent an adjustment clause or establish a legal right to extra payment.
- Price clause
- Base date and period
- Verified indices
- Weights and claimed amount
- Official texts cited
- Sources checked on
- Drafted with AI assistance, our method
General legal information with official references and dated checks. It is not personalised advice: for a decision that commits you, have your situation checked by a qualified professional.
Julie by AlphaDeep
Which dates and periods must match?
Keep initial-price date, performance period and agreed frequency. A correct index for the wrong period does not reproduce the clause.
Read the referencesYour question concerns “5 checks for a contract price-indexation formula”. I can help organise the facts and records. Which document have you received or prepared, and is this a French or Swiss matter?
3 free questions at signup. Avoid names and sensitive information.
Which clause governs price adjustment?
Separate updating, reference adjustment and formula revision. Inflation alone does not select the contractual method.
Code de la commande publique art. R2112-13Code de la commande publique art. R2112-14220 : Art. 373220 : Art. 374KBOB Guide renchérissement contractuel, V3.0, §5.2KBOB Guide renchérissement contractuel, V3.0, §5.3DAJ/OECP : Guide sur le prix, mise à jour juin2024
Which records are still missing from your file?
Indicate which records you have. The result identifies gaps and prepares a complete question for Julie, without requiring an account.
Fictional example · Your preparation
Point to complete: Weights and claimed amount. Collect fixed part, weights and rounding rules. The single-index example does not replace a different weighted formula.
- Price clause
- Record available
- Base date and period
- Record available
- Verified indices
- Record available
- Weights and claimed amount
- Needs checking
- Records indicated
- 3 / 4
- Arithmetic result
- 1,050.00
- Which weights form the actual formula?
Use one currency and one period. Initial figures are fictional; the result is arithmetic only. Single-index illustration: price × comparison index ÷ base index. A weighted formula or another contractual method needs a separate calculation. This worksheet organises records; it does not establish admissibility, entitlement or a procedural outcome.
Which preparation steps come first?
Editorial preparation order, not a popularity or success-probability ranking. Read the contractual method and period before indices and arithmetic.
Clause and adjustment type
Separate updating, reference adjustment and formula revision. Inflation alone does not select the contractual method.
Code de la commande publique art. R2112-13Code de la commande publique art. R2112-14220 : Art. 373220 : Art. 374KBOB Guide renchérissement contractuel, V3.0, §5.2KBOB Guide renchérissement contractuel, V3.0, §5.3DAJ/OECP : Guide sur le prix, mise à jour juin2024
Periods and base date
Keep initial-price date, performance period and agreed frequency. A correct index for the wrong period does not reproduce the clause.
Code de la commande publique art. R2112-13Code de la commande publique art. R2112-14220 : Art. 373220 : Art. 374KBOB Guide renchérissement contractuel, V3.0, §5.2KBOB Guide renchérissement contractuel, V3.0, §5.3DAJ/OECP : Guide sur le prix, mise à jour juin2024
Indices checked at their source
Retain publication, series, value and date. This worksheet supplies no official index or invented inflation rate.
Code de la commande publique art. R2112-13Code de la commande publique art. R2112-14220 : Art. 373220 : Art. 374KBOB Guide renchérissement contractuel, V3.0, §5.2KBOB Guide renchérissement contractuel, V3.0, §5.3DAJ/OECP : Guide sur le prix, mise à jour juin2024
Contractual weights
Collect fixed part, weights and rounding rules. The single-index example does not replace a different weighted formula.
Code de la commande publique art. R2112-13Code de la commande publique art. R2112-14220 : Art. 373220 : Art. 374KBOB Guide renchérissement contractuel, V3.0, §5.2KBOB Guide renchérissement contractuel, V3.0, §5.3DAJ/OECP : Guide sur le prix, mise à jour juin2024
Comparison with the claimed amount
No. It only multiplies entered price by comparison index divided by base index; zero denominator is rejected.
Code de la commande publique art. R2112-13Code de la commande publique art. R2112-14220 : Art. 373220 : Art. 374KBOB Guide renchérissement contractuel, V3.0, §5.2KBOB Guide renchérissement contractuel, V3.0, §5.3DAJ/OECP : Guide sur le prix, mise à jour juin2024
Which dates and periods must match?
Keep initial-price date, performance period and agreed frequency. A correct index for the wrong period does not reproduce the clause.
Where do the index values come from?
Retain publication, series, value and date. This worksheet supplies no official index or invented inflation rate.
Which weights form the actual formula?
Collect fixed part, weights and rounding rules. The single-index example does not replace a different weighted formula.
Which documents answer which questions?
| Record or information | Issue to check |
|---|---|
| Price clause | Separate updating, reference adjustment and formula revision. Inflation alone does not select the contractual method. |
| Base date and period | Keep initial-price date, performance period and agreed frequency. A correct index for the wrong period does not reproduce the clause. |
| Verified indices | Retain publication, series, value and date. This worksheet supplies no official index or invented inflation rate. |
| Weights and claimed amount | Collect fixed part, weights and rounding rules. The single-index example does not replace a different weighted formula. |
Code de la commande publique art. R2112-13Code de la commande publique art. R2112-14220 : Art. 373220 : Art. 374KBOB Guide renchérissement contractuel, V3.0, §5.2KBOB Guide renchérissement contractuel, V3.0, §5.3DAJ/OECP : Guide sur le prix, mise à jour juin2024
What does France's R2112-13 require?
The revisable-price clause identifies initial date, method and frequency within its scope. These records come before arithmetic.
Code de la commande publique art. R2112-13Code de la commande publique art. R2112-14220 : Art. 373220 : Art. 374KBOB Guide renchérissement contractuel, V3.0, §5.2KBOB Guide renchérissement contractuel, V3.0, §5.3DAJ/OECP : Guide sur le prix, mise à jour juin2024
Which official provision helps explain this situation?
Lorsque le prix est révisable, les clauses du marché fixent la date d'établissement du prix initial, les modalités de calcul de la révision ainsi que la périodicité de sa mise en œuvre. Les modalités de calcul de la révision du prix sont fixées :
In plain English: The revisable-price clause identifies initial date, method and frequency within its scope. These records come before arithmetic.
Does the illustrative ratio establish the amount due?
No. It only multiplies entered price by comparison index divided by base index; zero denominator is rejected.
Code de la commande publique art. R2112-13Code de la commande publique art. R2112-14220 : Art. 373220 : Art. 374KBOB Guide renchérissement contractuel, V3.0, §5.2KBOB Guide renchérissement contractuel, V3.0, §5.3DAJ/OECP : Guide sur le prix, mise à jour juin2024
Does Swiss CO 373 grant automatic inflation relief?
No. Its fixed-price works and extraordinary-circumstance framework differs from ordinary contract indexation. Actual contract type and incorporated method remain necessary.
What does the price reconciliation deliver?
It organises clause, periods, indices and claimed difference. It validates no absent formula and guarantees no payment.
What other questions arise in this file?
Which dates and periods must match?
Keep initial-price date, performance period and agreed frequency. A correct index for the wrong period does not reproduce the clause.
Code de la commande publique art. R2112-13Code de la commande publique art. R2112-14220 : Art. 373220 : Art. 374KBOB Guide renchérissement contractuel, V3.0, §5.2KBOB Guide renchérissement contractuel, V3.0, §5.3DAJ/OECP : Guide sur le prix, mise à jour juin2024
Which weights form the actual formula?
Collect fixed part, weights and rounding rules. The single-index example does not replace a different weighted formula.
Code de la commande publique art. R2112-13Code de la commande publique art. R2112-14220 : Art. 373220 : Art. 374KBOB Guide renchérissement contractuel, V3.0, §5.2KBOB Guide renchérissement contractuel, V3.0, §5.3DAJ/OECP : Guide sur le prix, mise à jour juin2024
What does France's R2112-13 require?
The revisable-price clause identifies initial date, method and frequency within its scope. These records come before arithmetic.
Code de la commande publique art. R2112-13Code de la commande publique art. R2112-14220 : Art. 373220 : Art. 374KBOB Guide renchérissement contractuel, V3.0, §5.2KBOB Guide renchérissement contractuel, V3.0, §5.3DAJ/OECP : Guide sur le prix, mise à jour juin2024
Does Swiss CO 373 grant automatic inflation relief?
No. Its fixed-price works and extraordinary-circumstance framework differs from ordinary contract indexation. Actual contract type and incorporated method remain necessary.
Code de la commande publique art. R2112-13Code de la commande publique art. R2112-14220 : Art. 373220 : Art. 374KBOB Guide renchérissement contractuel, V3.0, §5.2KBOB Guide renchérissement contractuel, V3.0, §5.3DAJ/OECP : Guide sur le prix, mise à jour juin2024
Which official references should you consult?
- Code de la commande publique art. R2112-13Légifrance
- Code de la commande publique art. R2112-14Légifrance
- 220 : Art. 373Fedlex
- 220 : Art. 374Fedlex
- KBOB Guide renchérissement contractuel, V3.0, §5.2Source officielle
- KBOB Guide renchérissement contractuel, V3.0, §5.3Source officielle
- DAJ/OECP : Guide sur le prix, mise à jour juin2024Source officielle
Texts cited last checked: 1 November 2026