Article 20 — Contract modifications
In brief
This article governs when an already awarded R&D procurement contract can be changed during its term without launching a new procedure. It allows modifications foreseen in clear review or price-revision clauses, and other changes that are either not substantial or, though substantial, fall within listed exceptions. It also sets a value-based safe harbour, publication duties for larger changes, and record-keeping requirements.
Key points
- Modifications are allowed without a new procedure where clear, precise and unequivocal review clauses (including price-revision clauses or options) were set out in the initial documents and do not alter the overall nature of the contract.
- Other modifications are allowed where they are not substantial, or are substantial but fall within listed cases, and respond to objective needs, stay limited to what is necessary, and do not shift the contract’s economic balance in the contractor’s favour beyond what was foreseen.
- The article defines when a change is ‘substantial’ and lists permissible substantial modifications, such as necessary additional services, unforeseeable circumstances, and defined contractor-replacement situations.
- A change not exceeding 15% of the initial contract value is treated as non-substantial, subject to conditions; successive modifications are assessed on their net cumulative value.
- Buyers must record the essential elements and justification of any modification; a modification notice must be published before changes exceeding 50% of the initial estimated value, and within 20 calendar days for certain substantial modifications not exceeding 50%.
What it means in practice
Public buyers gain a structured framework for adapting long or uncertain R&D contracts as needs and technology evolve, but must plan review clauses in advance and keep detailed written justifications for audit and review bodies. Contractors and subcontractors benefit from clearer rules on when a contract can flex, including on price and on succession following mergers, insolvency or restructuring, while modifications cannot be used to paper over unjustified performance failures.
Official text — Article 20 (COM(2026) 567)
1. Public buyers may modify awarded R&D procurement contracts during their term
without a new R&D procurement procedure where that possibility, irrespective of the
modifications’ monetary value, has been provided for in the initial procurement
documents in clear, precise and unequivocal review clauses, which may include price
revision clauses or options. Such clauses shall state the scope and nature of possible
modifications or options as well as the conditions under which they may be used.
Such clauses shall not provide for modifications or options that would alter the
overall nature of the R&D procurement contract.
2. Public buyers may also modify awarded R&D procurement contracts during their
term without a new R&D procurement procedure provided that both the following
conditions are fulfilled:
(a) the modification is not substantial within the meaning of paragraph 3 or where
the modification is substantial but falls within any of the cases listed in
paragraph 4;
(b) the modification responds to object ive needs arising during the performance of
the R&D procurement contract, is limited to what is necessary and appropriate
43 Agreement on Trade-Related Aspects of Intellectual Property Rights (TRIPS), set out in Annex 1C to
the Agreement establishing the World Trade Organization, OJ L 336, 23.12.1994, p. 214, ELI:
http://data.europa.eu/eli/agree_internation/1994/800(16)/oj.
for ensuring its performance and continuity and not alter the initial economic
balance of the contract in favour of the contractor in a manner which was not
provided for in the original contract.
3. A modification shall be considered substantial in one or more of the following cases:
(a) the modification introduces conditions which, had they been part of the initial
procurement procedure, would have allowed for the admission of other
candidates than those initially selected or for the acceptance of a tender other
than that originally accepted or would have attracted additional participants in
the procurement procedure;
(b) where it changes essential terms or conditions of the contract, such as
(c) a change in the economic balance of the R&D procurement contract in favour
of the contractor in a manner which was not provided for in the original
contract as a consequence of either;
(i) a considerable extension of the scope of the R&D procurement contract;
(ii) the identity of the contractor in other cases than those provided for under
paragraph 4, point (c).
4. Provided that they do not alter the initial economic balance of the R&D procurement
contract in favour of the contractor in a manner which was not provided for in the
initial R&D procurement contract, substantial modifications shall be permissible
within the meaning of paragraph 2 only in the following cases:
(a) where additional services, or supplies have become necessary during
performance of the R&D procurement contract, provided that a change of
contractor is not technically or economically feasible, including due to
interdependence with existing works or servic es or substantial increase of
costs;
(b) where the modification is necessary due to circumstances which could not
reasonably be anticipated by a diligent public buyer at the time of the launch of
the R&D procurement procedure, and which significantly affec t the
performance or feasibility of the contract, including:
(i) substantial changes in the applicable regulatory or legal framework;
(ii) major technological developments;
(iii) severe disruptions, emergencies or crises with significant economic,
societal or operational impact;
(c) where the original contractor is replaced by another entity in one of the
following cases:
(i) following a merger, takeover, acquisition, insolvency or other corporate
restructuring, another economic operator succeeds, w holly or partly, to
the rights and obligations of the original contractor, provided that the
new entity fulfils the original qualitative selection criteria, that no other
substantial modifications are made to the R&D procurement contract and
that the repl acement is intended to circumventing the application of this
Regulation; or
(ii) in the event that the public buyer itself assumes the main contractor’s
obligations towards its subcontractors where this possibility is provided
for under national law.
5. Modification, the value of which does not exceed 15 % of the value of the initial
R&D procurement contract shall be considered non -substantial and may be made
without a new procurement procedure, provided that the modification does not alter
the initial econ omic balance of the R&D procurement contract in favour of the
contractor in a manner which was not provided for in the initial R&D procurement
contract.
Where several successive modifications are made, the thresholds shall be assessed on
the basis of the net cumulative value of the successive modifications.
6. Before modifying the R&D procurement contract, the public buyer shall establish, on
the basis of objective and verifiable elements, that the conditions set out in paragraph
2 are satisfied. Public bu yers shall maintain detailed written records of the essential
elements of the modification, including its justification, its necessity or
appropriateness, and its impact on the economic balance of the contract, in particular
on the allocation of risks and economic advantages, to justify decisions to modify the
R&D procurement contract and to enable verification of compliance with this Article
by competent supervisory, audit and review bodies.
7. Before any modification of a R&D procurement contract that exc eeds 50 % of the
initial estimated value of the contract, the public buyers shall publish a contract
modification notice to that effect. Such notice shall contain the justification for the
modification without a new procurement procedure. Consecutive modif ications shall
not be aimed at circumventing this Regulation.
8. Where public buyers substantially modify an R&D procurement contract in
accordance with paragraph 4, and the modification does not exceed 50 % of the
initial estimated value of the contract, they shall publish a contract modification
notice within 20 calendar days from the date on which the modification was made.
9. Modifications of an R&D procurement contract shall not be used to remedy
deficiencies of the contractor’s performance that are no t justified by circumstances
beyond its control.
Source: European Commission, proposal for a Regulation establishing the European Innovation Act, COM(2026) 567 final, 9 September 2026. Read the official proposal (PDF). Text may change during the legislative process.
Anthony Bochon’s analysis
This article is a careful transposition of the contract-modification case law and codified rules familiar from the 2014 procurement directives, adapted to the peculiar reality that R&D contracts change as knowledge is created. The distinction between clear review clauses, non-substantial changes, and the closed list of permissible substantial modifications is orthodox; what is tailored to innovation is the recurring test that a change must not alter the initial economic balance in favour of the contractor and the express recognition, in paragraph 4(b), of major technological developments and crises as circumstances a diligent buyer could not anticipate. In my reading the 15% safe harbour and the 50% publication and notice thresholds give practitioners usable bright lines, but they will not excuse a modification that reshapes the bargain.
The provision I would flag for buyers is paragraph 6: the obligation to keep detailed written records justifying necessity, appropriateness and impact on the allocation of risk is not administrative decoration — it is the evidentiary basis on which supervisory and audit bodies, and ultimately courts, will test compliance. Addressees should build modification governance into the contract from day one, because paragraph 9’s ban on using modifications to rescue unjustified under-performance means the audit trail must show that change followed genuine objective need.