The factory sends a higher price for the next release, citing a rise in raw materials. Your framework already contains a price-review clause. The question is not whether a market headline sounds plausible, but whether the proposed change follows the mechanism you agreed for an unchanged product.
The product, figures and records here are fictional editorial illustrations. They are not commodity forecasts, A2vanta prices or standard contract terms. Qualified commercial reviewers and counsel must assess the actual clause and applicable law.
Recover the complete mechanism
Identify the named index and publisher, grade or series, baseline value, reference date, comparison date and currency. Then locate the share of the unit price to which the index applies. A material index should not be applied to the whole product price unless that is actually the agreed rule.
Check the review interval, trigger, cap, floor and treatment of decreases. Does the clause use a single observation or an average? What happens when the series is discontinued or revised? If the agreement leaves a gap, obtain an authorised resolution rather than quietly substitute a more favourable series.
Reproduce the proposed delta
Ask for the source observations and a calculation that another reviewer can reproduce. Separate the index movement from the resulting change in the unit price. Confirm that the same product revision, quantity basis and included charges are being compared.
For a synthetic example only, a base price of 10 currency units has an indexed component share of 40 percent. If the agreed index moves from 100 to 110, a formula of base price × [1 + share × (new index / base index - 1)] gives 10.40 before any contractual trigger, cap or rounding. This is an illustration of one possible formula, not a recommended clause. Applying the 10 percent index movement to the entire price would instead give 11, which this fictional formula does not support.
If the same formula allows downward adjustments, test a decrease too. Do not add symmetrical treatment as a new entitlement if the agreement does not contain it. Counsel should resolve ambiguous or disputed wording.
Record the review as a commercial change
| Question | Evidence to attach |
|---|---|
| Which mechanism? | Accepted clause version and applicable product |
| Which observations? | Named series, dates, currency and source values |
| Which price portion? | Agreed component share and unchanged baseline |
| Which limits? | Review window, trigger, cap, floor and rounding |
| Which result? | Reproducible delta and reviewer approval |
| Which orders? | Effective date and specifically covered new releases |
This is an editorial review card, not a universal pricing standard. The reviewer should be qualified to assess the commercial formula and technical relevance of the index. A supplier spreadsheet with hidden assumptions is not yet a reproducible change.
Protect the boundary around accepted orders
Identify which future call-offs use the revised price and preserve the previous basis for releases already accepted. A proposed effective date should not quietly alter existing commitments. If the parties wish to amend an accepted order, handle that as a separately authorised contractual change.
Article 29 of the CISG official text concerns modification by agreement where applicable. Articles 1.3, 5.1.7 and chapter 6.2 of the UNIDROIT Principles 2016 provide general context on binding contracts, price determination and hardship. They do not give every seller an automatic right to reset the price when material costs rise. Counsel must assess applicability and the actual terms; this article does not determine whether hardship exists or what remedy follows.
Separate indexation from other price questions
The listing-versus-quote guide concerns comparing a published offer with an actual quotation. This review starts with a pre-agreed recurring mechanism, not a fresh negotiation over a listing.
The committed-materials surcharge guide addresses buyer changes and existing work or materials. An unchanged product's indexed price is a different question. If the supplier also changes the design or adds a surcharge, identify that separately instead of hiding it inside the index movement.
Use the CNY-versus-USD invoice guide for the separate currency decision. A currency change should not silently introduce another adjustment beyond the agreed formula.
Release the new price only after approval
Send the reviewer-approved calculation and effective release list to purchasing and finance. Obtain the supplier's acknowledgement through the agreed process, then ensure the new proforma matches the approved scope. If evidence is missing, resolve the proposed new price rather than calling it automatically fair or refusing an existing due payment without advice.
Use pay an invoice to ask A2vanta about an approved supplier payment before funding. Payment handling does not validate the commodity index, negotiate the clause or guarantee the fairness of a price.