Learning Center · Proposal Writing

How to Write a Winning Bid

A winning bid answers the question asked, in the order asked, with evidence instead of adjectives. Here's how to turn claims into checkable proof, find the three or four discriminators that separate you from the field, structure each answer for a scoring evaluator, and use a debrief when you lose.

By The Bid Lab Team·Published 10/10/2018·Updated 8/25/2026

A winning bid answers the question that was asked, in the order it was asked, with evidence instead of adjectives. Nearly every losing bid that made it past compliance failed on the third of those. Compliance gets you scored; evidence gets you chosen. This guide is about the writing itself - how to turn what your company can do into claims an evaluator can award points for.

What Separates a Winning Bid From a Merely Compliant One?

Compliance is the entry fee. A response that answers every question, returns every form and respects every page limit has earned the right to be read - and most of your competitors will have managed the same. What separates the winner is whether the evaluator finishes each answer knowing something specific and verifiable about your firm that they do not know about anyone else's. If your response could be handed to a competitor and remain broadly true after a find-and-replace on the company name, it will not win. Our guide to ensuring RFP compliance covers the entry fee; this page covers what comes after it.

How Do You Turn Claims Into Evidence?

By replacing every adjective with a fact an evaluator could check. This single habit changes more scores than any other writing advice:

Weak claimWhy it failsStronger version
We are highly experiencedEvery bidder writes this; it carries no informationWe have completed 14 municipal water main replacements in this county since 2019
We provide excellent customer serviceUnfalsifiable, so unscoreableOur average response time on emergency call-outs last year was 3.5 hours against a 24-hour contract standard
Our team is well qualifiedThe evaluator has to take your word for itThe project manager assigned holds a PE license and has run six projects of comparable scope, listed below
We use industry best practicesNames nothingWe follow the AWWA C651 disinfection standard, which your specification references in Section 3.2
We saved our client moneyNo magnitude, no proofWe reduced the client's annual maintenance spend by $180,000, confirmed in the reference letter at Appendix C

The test is simple: could a competitor copy the sentence into their own proposal without lying? If yes, it is not doing work for you.

What Are Discriminators, and How Do You Find Yours?

A discriminator is something true of you that is not true of the other bidders, that the buyer actually cares about, and that you can prove. All three conditions matter - a genuine strength nobody is scoring you on is not a discriminator, and neither is a claim every competitor can also make. Run a short session with the people who will deliver the work before anyone starts writing, and ask what you would say if the buyer were in the room. Local presence, a specific certification, a piece of equipment, staff continuity on similar contracts, a named person with unusual credentials. Then thread those three or four points through the response wherever the evaluation criteria give them somewhere to land.

Made for small businesses.Start searching

How Should You Structure Each Answer?

Answer first, then prove, then connect. Evaluators are reading dozens of these and scoring against a rubric, so make the point findable:

  1. Lead with the direct answer. The first sentence should answer the question as asked. Do not open with company history or a restatement of the question.
  2. Follow with the evidence. A number, a named project, a certification, a reference. One concrete proof beats three general assurances.
  3. Close with relevance to this buyer. Say explicitly why that evidence matters for their project - the same conditions, the same scale, the same regulatory environment.
  4. Mirror their language. If the solicitation calls it a "service delivery plan," your heading says service delivery plan. Evaluators searching for an answer should not have to translate.

The executive summary follows the same rule at document scale, and it is the section most likely to be read by whoever makes the final call.

Who Should Write Which Section?

Assign by knowledge first and availability second, then check the second one honestly. The person who best understands the technical approach should draft it, but not if they are away for two weeks in the middle of the window. Give every section a named owner and a date that sits well before the deadline, and make sure someone owns the sections nobody wants - forms, certifications, appendices - because those are the ones that get discovered unfinished. Most of the raw material already exists somewhere in your business; our guide to content you can leverage for RFP responses covers where to look before writing anything from scratch.

What Should the Mid-Point Review Catch?

Gaps, and what they tell you. Schedule a checkpoint at roughly the halfway mark and read the draft against the requirements. If several questions have no answer because nobody in the business can answer them, that is not a writing problem - it is information about whether you should be bidding at all. Pause and make that decision deliberately rather than discovering it at 2am on the deadline. A bid abandoned at the halfway point costs far less than a bid submitted incomplete.

What Do You Do After You Lose?

Request the debrief, and treat it as the cheapest training available. Public agencies will usually explain how your proposal scored and where it fell short, which is far better information than guessing. Log what the evaluators valued, because agencies tend to weight consistently across procurements. And keep bidding - win rates are a portfolio outcome, and the firms that win regularly are usually the ones still in the room. Reviewing the most common reasons responses get rejected before the next attempt is a good use of an hour.

See It in a Real Bid

Evidence-first writing is easiest to practice against a live solicitation with real evaluation criteria in front of you. Find one worth the effort, then write to it. Search open bids on Bid Banana.

Frequently asked questions

How do you write a winning bid?

Answer the question that was asked, in the order it was asked, with evidence rather than adjectives. Compliance earns you a score; specific, checkable proof earns you the award. The practical test is whether a competitor could copy your sentence into their own proposal without lying - if they could, it is not working for you.

What is a discriminator in bid writing?

A discriminator is something true of your firm that is not true of your competitors, that the buyer actually cares about, and that you can prove. All three conditions matter: a genuine strength nobody is scoring is not a discriminator, and neither is a claim every rival could also make. Identify three or four before writing begins.

How should you structure an answer in a bid?

Lead with the direct answer to the question as asked, follow immediately with concrete evidence such as a number, named project or certification, then close by connecting that evidence to this buyer's project. Mirror the solicitation's own language in your headings so evaluators scoring against a rubric can find each answer quickly.

Who should write each section of a bid response?

Assign by knowledge first, then check availability honestly - the best person for the technical approach is no use if they are away mid-window. Give every section a named owner and an internal date well before the deadline, and make sure someone owns the unglamorous parts: forms, certifications and appendices, which are what get found unfinished.

What should you do after losing a bid?

Request a debrief. Public agencies will usually explain how your proposal scored and where it fell short, which beats guessing. Record which evaluation factors that agency weighted most heavily, since they tend to be consistent across procurements, and use the feedback on the next submission rather than filing it away.

Writing Your Response