Non-compliant tender
This article describes in detail the tender process for a typical commercial construction contract.
For a wider description of the range of tender processes that might be adopted on different types of project, see Tender processes.
For more information about different contractual procurement routes, see Procurement route.
An invitation to tender will generally include very specific requirements for the information and format of the tender that prospective suppliers must submit. This ensures that necessary information is included and that it is in a format that the client is able to analyse and compare with other tenders.
If a prospective contractor or supplier submits a tender that does not comply with the client's requirements then that bidder is said to have submitted a non-compliant bid. This can result in the tender being rejected. Full compliance requires that all material conditions of the invitation to tender must be complied with.
A tender may be non-compliant by:
- Not answering all the question(s).
- Exceeding the required word length.
- Submitting in the wrong format e.g PDF when Excel or Word were required.
- Making a late submission.
- Not breaking down information in the correct way.
- Submitting proposals that do not comply with the client's requirements.
However, a non-compliant proposal, sometimes referred to as a variant bid, may be submitted intentionally if the tenderer believes that an alternative could offer better value for money that the requirements set out in the invitation to tender. However, non-compliant proposals should only be submitted if they have been requested or are explicitly permitted by the client, and they may need to be accompanied by a compliant bid to allow direct comparison with other tenders.
See also: Qualified bid.
[edit] Related articles on Designing Buildings Wiki
- Best value.
- Bid writer.
- Competitive tender.
- Contract award.
- Contract conditions.
- Contract documents.
- Due diligence when selecting contractors or subcontractors.
- Invitation to tender.
- Letter of award.
- Mid-tender interview.
- Most Economically Advantageous Tender (MEAT).
- Pre-tender interview.
- Procurement route.
- Qualified bid.
- Selection criteria.
- Tender documentation.
- Tender evaluation.
- Tender processes.
Featured articles and news
We're expanding our collaborative mission by launching DB Intelligence, an exclusive market research advisory panel. Built environment professionals can now get paid to share their expertise on industry trends, products and services.
Panel members receive direct financial incentives for participating in research projects like short surveys, 1-2-1 interviews and focus groups. Register today to shape the future of the construction sector.
Planning condition discharge in England and Wales
A brief exoplanation from a building compliance expert, with further links.
Overheating guidance and tools for building designers
Guidance for dealing with element of building fabric control that have increasing importance.
Shading for housing, a design guide
From the Good Homes Alliance and British Blind and Shutter Association.
UK Standard Skills Classification (SSC)
A shared framework for describing skills needs.
Social media ban consultation comes to close
CIOB urges UK Government to consider social media’s role in careers guidance in ban debate.
The latest of eight Skills England apprenticeship units
The addition of battery manufacturing welcomed by ECA with a warning about the risks of fast-tracked apprenticeship units.
Building Control Independent Panel final report
A precis of a key report led by Dame Hackitt with full recommendations and link to the government response.
Building Safety recap April, 2026
A short and longer run-through of the month, with links to further information and sources.
CIAT May 2026 briefing.
From medieval scribes to modern word art.
ECA welcomes crackdown on late payment and push for clean energy, whilst CIOB seek fixed cladding removal timeframes.
Cyber Security in the Built Environment
Protecting projects, data, and digital assets: A CIOB Academy TIS.
Managing competence in the built environment
ITFG publishes new industry guide on how to meet the ICC principles.
The UK's campaign to reduce noise pollution: Mythbusting, articles and topic guides.




















