Bid writing
How to write a winning tender response
Published 14 January 2026 by eSourcingData
A winning tender response answers the buyer's published evaluation criteria directly, backs every claim with evidence and complies with every instruction in the invitation to tender. This guide walks through the practical steps, from decoding the specification to a final compliance check before you submit.
Start with the invitation to tender, not a blank page
Before writing anything, read the invitation to tender (ITT) and specification in full. The buyer tells you exactly what they will assess, how much each section is worth and what evidence they expect. Everything you write should map back to those published rules rather than to what you assume they want to hear.
Build a response plan that lists every question, its word or page limit, its weighting and the format required. This becomes your checklist and stops you writing brilliant answers to questions nobody asked. It also reveals early whether you can realistically meet the requirement before you invest days of effort.
Answer the evaluation criteria, not the topic
Buyers score against defined criteria and a marking scheme, often on a scale where higher marks require you to fully address the requirement with clear, credible evidence. A common failure is writing about the subject in general terms while leaving the actual scored sub-questions unanswered.
Read each question line by line and mirror its language in your headings. If a question asks how you will manage mobilisation, staffing and risk, give the evaluator three clearly signposted answers. Evaluators reward responses that are easy to score, so make it obvious where each mark should land.
Evidence every claim
Unsupported assertions win few marks. Replace phrases like "we are experienced and reliable" with specific, verifiable evidence: named contracts of similar size and scope, measurable outcomes, accreditations and processes you actually operate. Evidence is what separates a compliant answer from a high-scoring one.
Where you can, quantify. Describe the scale of a comparable contract, the outcome you delivered and how it was measured. Use short case examples to prove capability rather than simply stating it. Keep evidence relevant to the specific requirement being assessed rather than listing everything you have ever done.
Write for a busy evaluator
Evaluators read many bids under time pressure. Clear structure helps them find and award marks. Use the question wording as your heading, lead with your answer, then support it. Short paragraphs, plain UK English and signposting all make your response easier to score.
Respect word and page limits precisely. Going over can mean the excess is not read, or the whole response is marked non-compliant. Cut jargon and repetition so every sentence earns its place. If a diagram or table communicates faster than prose, and the ITT allows it, use one.
Check compliance before you submit
Many strong bids are rejected on process, not content. Confirm you have completed every mandatory field, attached every required document, met every certification requirement and stayed within limits. A single missed signature or unmet minimum standard can make the whole submission ineligible.
Treat the deadline as immovable. Portals close automatically and late bids are almost never accepted, regardless of the reason. Upload early, leave time for large files and technical problems, and keep a copy of every confirmation the portal gives you.