Advice 8 min readUpdated on 15 January 2026

The 10 mistakes that lose a tender bid (and how to avoid them)

Every year, thousands of SMEs lose public contracts for avoidable reasons. Here are the 10 most common mistakes and how to correct them.

1. Not reading the consultation rules first

The consultation rules are your roadmap: criteria, weighting, deadlines, required documents. It is the first document to read.

Solution: Always start with the consultation rules. If the technical value accounts for 60%, concentrate 60% of your effort on the technical proposal.

2. Responding to all tenders without selection

Responding takes between 20 and 80 hours. If you respond to everything, quality decreases.

Solution: Conduct a systematic Go/No-Go. Evaluate the fit with your skills, the likely competition and your real chances.

3. Copy-pasting the proposal from a previous contract

The evaluator immediately spots a generic document. A wrong client name is practically eliminating.

Solution: Start from a content base, but personalize each section by citing the specifications and the contract context.

4. Neglecting the layout

A proposal without illustrations, table of contents or spacing is painful to read.

Solution: Professional cover page, clickable table of contents, hierarchical headings, diagrams, photos, tables. Layout is a prerequisite, not a bonus.

5. Forgetting documents from the application file

An incomplete file makes your offer irregular. In formal procedures, it means direct elimination.

Solution: Create a checklist from the consultation rules. Check each document the day before submission.

6. Submitting at the last minute

Electronic submission platforms can be unpredictable. If you submit 30 minutes before the deadline, any technical problem eliminates you.

Solution: Aim to submit 48 hours before the deadline.

7. Proposing an abnormally low price

The buyer must detect abnormally low bids. If you cannot justify your price, your offer will be rejected.

Solution: Cost your real expenses. A contract won at a loss is worse than a lost contract.

8. Ignoring environmental and social criteria

Since 2021, environmental considerations are mandatory in public procurement. More and more consultation rules include CSR and carbon criteria.

Solution: Systematically include a sustainable development section in your proposal.

9. Not requesting a debriefing after rejection

The buyer is required to justify the rejection and provide the characteristics of the winning offer.

Solution: Systematically request a motivation letter and a debriefing meeting.

10. Not capitalizing on your past responses

Each response represents dozens of hours of work. Starting from scratch every time is wasteful.

Solution: Build a library of reusable content: reference sheets, standard CVs, equipment descriptions, quality plans.

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