The verdict in three sentences
For a construction SME answering 90 public tenders a year, the technical proposal is the biggest sales time sink: about 3 days per response, or 270 person-days. An internal knowledge base connected to an AI that reads the tender documents and pre-drafts the proposal costs 12,000 to 25,000 EUR excl. VAT and brings drafting down to about 1 day. The gain is real provided you keep mandatory human review and host the data inside the European Union.
What AI does well, and what it must never do alone
A construction technical proposal reuses 60 to 70% of material already written: company profile, staff and equipment, quality, safety, environment, comparable references. The high-value work remains analysing the technical specifications, the site-specific methodology and the schedule. AI speeds up the first part and prepares the second, without replacing it.
| Proposal task | Time without AI | Time with AI (2026 estimate) | Human role |
|---|---|---|---|
| Reading tender documents and extracting criteria | 3 to 4 h | 30 to 45 min | Check the scoring grid |
| Profile, resources, certifications | 4 to 5 h | 30 min | Update headcounts |
| Similar project references | 2 to 3 h | 20 min | Pick the most relevant |
| Execution methodology | 6 to 8 h | 3 to 4 h | Expert writing, site constraints |
| Safety, environment, waste management | 3 h | 45 min | Adapt to the site |
| Schedule and phasing | 3 to 4 h | 2 to 3 h | Site manager |
| Layout and compliance check | 2 h | 45 min | Final review |
The AI must never invent a reference, a Qualibat certification or a headcount. The system is therefore built to cite its internal sources: each generated paragraph links back to the knowledge base document it came from, and any unsourced paragraph is flagged in red.
Budget, hosting options and confidentiality
Tender documents and your prices are sensitive data. The architecture choice drives the budget.
| Option | Setup cost excl. VAT | Monthly cost excl. VAT | Confidentiality |
|---|---|---|---|
| Consumer SaaS tool, no internal base | 0 EUR | 20 to 60 EUR per user | Low: no guarantee on reuse |
| Specialised tender software on subscription | 1,000 to 3,000 EUR | 300 to 900 EUR | Medium, depending on contract |
| Knowledge base + AI via API, hosted in the EU | 12,000 to 18,000 EUR | 150 to 400 EUR | High: data excluded from training, EU servers |
| Full version with tender analysis, scoring grid, Word export | 18,000 to 25,000 EUR | 250 to 600 EUR | High |
| Model hosted on a dedicated server | 30,000 EUR and up | 800 to 1,500 EUR | Maximum |
For an SME with 20 to 80 employees, the third or fourth option is the right balance. The contract must state that data is not used to train the model, that hosting is in the EU and that the base can be exported at any time.
Setup time and success factors
Allow 8 to 10 weeks. The first 3 are spent building the base: 30 to 50 scored past proposals, supervisors' CVs, equipment sheets, certificates, QHSE procedures. Base quality drives 80% of the result. An SME that has not kept the scores obtained on its past proposals should start there, because those scores show which paragraphs convinced buyers.
Mini case study
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Julien runs a 45-employee structural works SME near Nantes. He answers 90 tenders a year at 3 days each, with a loaded cost of 450 EUR excl. VAT per day for his bid engineer. Current cost: 90 x 3 x 450 = 121,500 EUR excl. VAT a year. With AI, he saves 2 days per response: 180 days, or 81,000 EUR excl. VAT of freed time. The project costs 20,000 EUR excl. VAT, plus 4,800 EUR a year to run. It pays back in under 4 months, and Julien can answer 30 more tenders with the same team.
FAQ
How much does an AI for writing construction technical proposals cost an SME?
Between 12,000 and 25,000 EUR excl. VAT to set up depending on scope, then 150 to 600 EUR excl. VAT a month. The high end includes automatic tender document analysis and Word export in the company template.
Can a public buyer penalise a proposal written with AI?
No public procurement rule bans AI in 2026, but a generic proposal loses points. Human review and adaptation to the specifications remain mandatory to aim for a technical score above 15 out of 20.
Are our tender documents and prices protected?
Yes, with an EU-hosted API architecture and a contract excluding training on your data. We also recommend never loading the priced bill of quantities into the base.
How many past proposals are needed to start?
A minimum of 30 proposals, ideally with their technical scores, produces usable drafts from week 4. Beyond 80, the gain becomes marginal.
Does the tool work for private contracts?
Yes. Private consultations often ask for a shorter proposal of 8 to 15 pages, and the tool adapts to the required format.
Let's scope your project. Send us your annual tender volume and two recent proposals: we will define the scope, an indicative budget between 12,000 and 25,000 EUR excl. VAT and an 8 to 10 week timeline. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
