What Is a Tender Invitation Letter? (ITT Meaning Explained)
A tender invitation letter, also known as an Invitation to Tender (ITT), formally invites suppliers to submit a detailed bid for a contract. It clearly outlines what the buyer requires, how they will evaluate your response, and how you must submit your tender.
However, many suppliers, especially those new to procurement, find ITTs overwhelming. They often include multiple documents, strict requirements, and detailed instructions. As a result, it can be difficult to know where to start.
Fortunately, once you understand how a tender invitation letter works, the process becomes much more manageable. At Hudson, we help businesses break down complex tender packs and focus on what really matters. Our experienced bid writing consultants support clients at every stage.
In this guide, we explain what a tender invitation letter is, when you receive one, what it includes, and, most importantly, how to respond effectively.
What is a tender invitation letter?
A tender invitation letter, or Invitation to Tender (ITT), marks a key stage in the tendering process. At this stage, the buyer formally invites suppliers to submit a full bid.
The buyer issues the ITT to shortlisted suppliers or the wider market and provides full details of the contract. Suppliers then complete pricing schedules, answer quality questions, and submit supporting documents.
When will I receive an ITT?
In many cases, an ITT follows a pre-qualification stage such as an SQ or PQQ. During this stage, the buyer shortlists suppliers based on experience, financial standing, and capability.
However, some buyers issue an ITT directly. Therefore, you should always review eligibility criteria before starting your response.
What does a tender invitation letter include?
- Specification or scope of works
- Pricing schedules
- Terms and conditions
- Site information
- Supporting appendices
What should you focus on?
- Submission deadlines
- Eligibility criteria
- Evaluation criteria
- Contract requirements
Common mistakes to avoid
- Missing deadlines
- Ignoring instructions
- Incomplete responses
Need help with an ITT?
If you need support, our bid writing services can help you submit a strong, compliant response.
Contact our team today to get started.
FAQs
What is a tender invitation letter?
A tender invitation letter, also known as an ITT, invites suppliers to submit a bid for a contract and explains the requirements and evaluation process.
Is an ITT the same as a tender?
No. An ITT invites you to tender, while your response is the actual tender submission.
When do you receive an ITT?
Usually after a PQQ or SQ stage, although some buyers issue ITTs directly.
What is included in a tender pack?
Typically specifications, pricing schedules, terms, and supporting documents.
How are ITT responses evaluated?
Buyers assess quality, price, and delivery approach to determine the most advantageous tender.
About the Author
Written by Joshua Smith, a seasoned bid-writing expert with experience across the UK, Middle East, and US, helping organisations secure the contracts they deserve through high-quality, competitive tender responses.