The verdict in three sentences
For an engineering firm answering more than 50 tenders a year, generative AI applied to technical submissions is one of the most profitable investments of 2026, provided it works on your own references rather than generic text. A custom tool costs 12,000 to 28,000 EUR excl. tax (about 10,300 to 24,100 GBP), plus 200 to 500 EUR per month in API usage. It cuts writing time by 40 to 60%, while the engineer stays in charge of methodology, resources and price.
What the tool does, and what it does not
The director of an engineering consultancy in London (structures, building services, civil or environmental) knows the problem: every tender pack arrives with instructions to tenderers, an 80-page specification and a mandatory response template. An engineer spends half a day spotting requirements, two days adapting text already written ten times, and another half day on formatting.
The tool works on these three steps. It extracts the requirements from the tender documents and sorts them by scoring criterion, it searches the internal library for the closest references and method statements, then it drafts a first version structured to the mandatory template, with sources cited. It decides neither the programme, nor the staffing, nor the financial offer, and it does not replace review by an engineer who commits the firm's liability.
| Technical submission step | Current time | Time with AI (estimate) | Gain |
|---|---|---|---|
| Reading tender pack and extracting requirements | 4 hours | 1 hour | 75% |
| Finding similar references | 3 hours | 30 minutes | 83% |
| Writing the method statement | 10 hours | 5 hours | 50% |
| Adapting CVs and staffing | 3 hours | 1.5 hours | 50% |
| Formatting and compliance check | 4 hours | 2.5 hours | 38% |
| Total per submission (3 days of 8 hours) | 24 hours | 10.5 hours | 56% |
These gains are 2026 ballpark figures observed on recurring submissions. On a highly unusual tender, the gain falls closer to 30%.
Budget: custom tool or generic assistant
A subscription to a general-purpose AI assistant costs 20 to 30 EUR per user per month. It helps rephrase, but it knows neither your references, nor your CVs, nor the requirements of the current tender, and the confidentiality of tender documents must be checked. The custom tool indexes your document base, applies your templates and keeps a trail of sources.
| Line item | Indicative 2026 budget (excl. tax) | Comment |
|---|---|---|
| Library indexing (references, CVs, past submissions) | 3,000 - 6,000 EUR | 200 to 500 submissions to structure |
| Requirement extraction from tender pack (PDF, DOCX) | 3,000 - 6,000 EUR | Requirements and criteria matrix |
| First draft generation to mandatory template | 4,000 - 10,000 EUR | Templates per assignment type |
| Review and approval interface | 2,000 - 6,000 EUR | Visible sources, history |
| Language model API usage | 200 - 500 EUR per month | Depends on pages processed |
| Generic AI assistant (comparison) | 20 - 30 EUR per user per month | No access to your base |
The total range of 12,000 to 28,000 EUR excl. tax mainly depends on the quality of the existing library. If past submissions are scattered across three servers, plan 2 to 3 weeks of sorting before starting.
Confidentiality and liability
Tender documents and your references contain data from public and private clients. The tool must use an API that does not retrain models on your data, store documents in a UK or European region and log access. On liability, every generated paragraph must be reviewed: a deadline or resource commitment invented by the tool would bind the firm if the contract is awarded.
Mini case study
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Oliver, director of a fictional 30-person engineering consultancy in London, answers 120 tenders per year, or 360 engineer days. With a 50% gain, he frees 180 days. At a loaded daily cost of 600 EUR, that represents 108,000 EUR per year. First-year cost reaches 20,000 EUR for the tool and 4,200 EUR in API usage, or 24,200 EUR. Payback is around 3 months, and Oliver can choose to answer 40 more tenders with the same team.
FAQ
How much does an AI tool for tender responses cost in 2026?
Budget 12,000 to 28,000 EUR excl. tax for a custom tool connected to your library, plus 200 to 500 EUR per month in API usage. A generic assistant costs 20 to 30 EUR per user, without access to your references.
What time savings can you expect on a technical submission?
On recurring tenders, writing time drops by 40 to 60%. A 24-hour submission comes down to around 10 to 14 hours, review included.
Can AI write the submission alone?
No, it prepares a sourced first draft that the engineer validates. Methodology, committed resources and price remain human decisions, because the firm carries the liability.
Do our documents stay confidential?
Yes, if the tool uses an API with no retraining on your data, hosting in the UK or Europe and an access log. These requirements rarely add more than 10% to the budget.
How long does deployment take?
Allow 6 to 10 weeks, including 2 to 3 weeks to structure the library. The first assisted submissions can be produced from week 5 in pilot mode.
Let's scope your project. Tell us your tender volume, assignment types and the state of your reference library: we will price the tool, API usage and pilot schedule. 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.
