What is an ITT? Invitation to Tender in UK Procurement Explained

An Invitation to Tender (ITT) is a formal document issued by a buying organization—typically in the public sector or large commercial enterprises—to invite bids from prospective suppliers for a specific contract. It is the core document in the tendering process, detailing the project scope, technical specifications, and evaluation criteria. You can see how BidPilot extracts these details in our Interactive Example Tender Report.

For UK small and medium-sized enterprises (SMEs), receiving or bidding on an ITT represents a major milestone. Unlike informal requests for quotes, an ITT requires a comprehensive, structured response that demonstrates your capability, compliance, and commercial viability.

PQQ vs. ITT: Where Does the ITT Fit in the Procurement Cycle?

Procurement processes in the UK typically follow one of two structures: single-stage (open procedure) or two-stage (restricted procedure). In a two-stage process, you must first complete a Pre-Qualification Questionnaire (PQQ) or Standard Selection Questionnaire (SQ) before you can receive the ITT.

• Pre-Qualification Stage (PQQ/SQ): Focuses on the bidder's company profile, financial health, previous experience, and mandatory compliance (insurance, health & safety). Only shortlisted suppliers advance.
• Tender Stage (ITT): Focuses on how you will deliver the contract and at what price. This is where you submit your detailed methodology, technical solutions, and commercial pricing model.

What is Typically Included in an ITT Package?

A standard ITT package is composed of several critical documents. Familiarizing yourself with these documents is essential for structuring a compliant response:

Step-by-Step: How to Write a Winning ITT Response

Writing a successful tender response is a blend of project management, technical writing, and compliance. Follow this checklist to structure your bid:

• 1. Conduct a Go/No-Go Assessment: Before writing a single word, read the ITT cover to cover. Do you meet the minimum financial and insurance thresholds? Do you have the capacity to deliver? If not, do not waste resources bidding.
• 2. Deconstruct the Questions: Break down each qualitative question. If a question asks for your 'methodology for quality control, staff training, and contract mobilisation', you must structure your answer into three distinct sections addressing each point.
• 3. Highlight Social Value: In UK public sector procurement, Social Value accounts for at least 10% (often 15-20%) of the total score under PPN 06/20. Outline your plans for reducing carbon emissions, hiring local apprentices, or supporting local supply chains.
• 4. Answer in the Active Voice: Use clear, professional, action-oriented language. Instead of writing 'BidPilot will aim to support...', write 'BidPilot delivers...'

Common Pitfalls to Avoid

Even the most experienced bid writers make mistakes that cost them the contract. Be especially careful with the following:

• Late Submissions: Upload portals close automatically down to the second. A submission that is even 1 second late is disqualified automatically.
• Non-Compliant Pricing: If the client asks for unit rates, do not submit a lump sum. Altering the client's Excel pricing sheet layout is an instant disqualifier.
• Boilerplate Copy-Pasting: Evaluators read hundreds of bids. Generic sales brochures will score poorly. Customise every answer to the client's specific challenges.