ITT Definition: What Does “Invitation to Tender” Mean?
An Invitation to Tender (ITT) is the formal document a buyer (a council, NHS trust, government department or other contracting authority) issues to invite suppliers to submit a priced, evidenced bid for a specific contract. It sets out what the buyer needs, the rules for bidding, and exactly how submissions will be scored.
The ITT is the rulebook for a competitive tender. Everything you are allowed to do, and everything that will get your bid rejected, is defined inside it. If the ITT says answers must be under 500 words, a 520-word answer can be marked non-compliant regardless of how good it is.
In one sentence: the ITT is the buyer’s formal request to bid; your “tender” is the response you submit against it.
What an ITT Document Contains
ITTs vary in length. A simple services contract might be 30 pages; a complex framework can run to several hundred. Almost all of them contain the same core sections:
Instructions to Tenderers
The rules: deadlines, format, word limits, how to submit, and what makes a bid non-compliant.
Specification
What the buyer actually wants delivered: scope, volumes, service levels and outcomes.
Evaluation Criteria
How your bid will be scored: the quality/price split and the weight of each question.
Pricing Schedule
A fixed template for your costs, so the buyer can compare every bid on a like-for-like basis.
Conditions of Contract
The terms you are agreeing to if you win: liabilities, payment terms, KPIs and termination.
Response / Quality Questions
The written questions you must answer to demonstrate your method, experience and approach.
For a section-by-section breakdown of every part of the pack, see our guide to what’s inside a tender document.
The ITT Process, Step by Step
- 1
The ITT is issued
Either openly to all interested suppliers, or only to those who passed an earlier Selection Questionnaire stage.
- 2
Clarification window
You can submit questions; the buyer must answer all bidders fairly. Use it: it is free intelligence.
- 3
You prepare and submit
Complete the pricing schedule, answer the quality questions, and upload everything before the deadline.
- 4
Evaluation
A panel scores each bid against the published criteria. Compliance failures are usually filtered out first.
- 5
Award and standstill
In UK public procurement the buyer notifies all bidders, then observes a standstill period before signing.
Want the full lifecycle from publication through to debrief? Read the tender process explained step by step.
ITT vs PQQ vs RFP vs RFQ: How They Fit Together
These acronyms cause more confusion than almost anything else in tendering. Here is the plain-English version:
PQQ / SQ: Pre-Qualification or Selection Questionnaire
The eligibility gate. Checks your financial standing, insurance and experience before you are allowed to bid. Comes before the ITT.
ITT: Invitation to Tender
The formal bid request, most common in UK and EU public procurement. Asks for both price and quality.
RFP: Request for Proposal
The same idea as an ITT, but the term used more in the private sector and the US. Often invites suppliers to propose how to solve a problem, not just price a fixed spec.
RFQ: Request for Quotation
The lightest form. Used for simple, well-defined purchases where price is essentially the only deciding factor.
A Worked Example: Reading a Real ITT
Imagine a local authority issues an ITT for an IT support contract. Here is how an experienced bidder reads it, and what a first-timer typically misses:
The evaluation split
The ITT states 60% quality / 40% price. That is a very common weighting in UK public contracts. A first-timer spends most of their effort sharpening the price. The data says the opposite: most of the score lives in the four written quality questions.
A hidden pass/fail gate
Buried in the Instructions: bidders must hold a minimum level of professional indemnity insurance. Miss it and the bid is rejected before the quality answers are even read.
A social value weighting
10% of the score is allocated to social value. A bidder who skims past this leaves easy marks on the table that a prepared competitor will take.
The timeline
Issue date, clarification deadline, and submission deadline are all fixed. The clarification deadline almost always falls well before the submission deadline. Questions left too late simply will not be answered.
The lesson: the best 20 minutes you spend on any ITT is mapping the evaluation criteria and the pass/fail gates before you write a word. TenderStria’s bid pack analysis surfaces the weights, gates and deadlines the moment you upload a pack.
How to Respond to an ITT: What Buyers Actually Evaluate
Compliance first
Hit every mandatory requirement, word limit and document. Non-compliance is the most common reason good bids lose.
Answer the question asked
Evaluators score against the published criteria, not against how impressive your company sounds. Mirror their language.
Evidence over assertion
“We are committed to quality” scores nothing. A named method, a timeline and a measurable outcome score highly.
For a deeper walkthrough, see how to write a tender response.
How to Find ITTs Relevant to Your Business
ITTs are published on procurement portals: Find a Tender and Contracts Finder in the UK, TED in the EU, SAM.gov in the US, CanadaBuys in Canada. The hard part is not access; it is sifting thousands of notices to find the few you can actually win.
Stop reading every ITT manually
TenderStria monitors the portals overnight, scores every notice against your business profile, and surfaces only the ITTs worth your time, each with written reasoning. When you upload a pack, it flags the pass/fail clauses, weights and deadlines before you start.
Frequently Asked Questions
What is the difference between an ITT and a PQQ?
A PQQ (Pre-Qualification Questionnaire), now usually called a Selection Questionnaire (SQ), filters suppliers on eligibility before the ITT stage. The ITT is then issued only to shortlisted suppliers and asks for a full commercial and technical bid. In short: the SQ decides whether you are allowed to bid; the ITT is the bid itself.
Is an ITT the same as a tender?
The terms are often used interchangeably, but technically an ITT is the buyer's formal invitation document, while "tender" can refer both to that document and to the supplier's submitted response. When someone says "we're working on the tender", they usually mean their response to the ITT.
What happens after an invitation to tender closes?
The buyer evaluates submissions against the criteria stated in the ITT (usually a quality/price split), notifies all bidders of the outcome, and in UK public procurement observes a mandatory standstill period before formally awarding the contract. Unsuccessful bidders are entitled to feedback explaining how their bid scored.