They do four things: extract the requirements from a tender, retrieve your own past answers, draft a response against each requirement, and check the draft for compliance and completeness. They do not price the job, and they do not know what makes you different.
Key takeaways
Strip the marketing away and every AI bid writing tool is the same four components. Knowing them tells you what to expect, what to prepare, and where the tool will embarrass you if you are not paying attention.
The tool reads the tender documents and produces a structured list of what must be answered, in what form, with what supporting evidence. This is the most reliable of the four because it is extraction rather than generation, and it is also the most valuable, because a missed mandatory requirement is fatal in a way that mediocre prose is not.
Which mandatory requirements even apply is itself governed by a threshold, not by an owner's preference. Under the Canadian Free Trade Agreement, a federal department or agency has to open a construction procurement to competitive tender once its estimated value reaches $139,000, with a higher threshold of $6,943,900 for Crown corporations (figures set for January 2026 through December 2027 under Treasury Board Contracting Policy Notice 2025-8). A tool extracting requirements from a covered procurement should be finding trade-agreement-driven mandatory forms that a smaller, uncovered job simply won't carry — useful context for judging whether an extraction that came back thin actually came back complete.
The holdback itself carries a similar human-read requirement. The Act lets some or all of it be retained as a letter of credit in the prescribed form or a demand-worded holdback repayment bond rather than as cash (Construction Act, s. 22(4)) — a proposal's financial narrative is a poor place for a drafting tool to guess which form the schedule of values actually assumes.
Where the tender runs more than a year, the holdback itself follows an annual release cycle rather than waiting for completion: a release notice within 14 days of each anniversary, payment 60 to 74 days after (Construction Act, s. 26(2)-(4)).
For each requirement, the tool searches your past proposals, project sheets, staff CVs, method statements, safety and quality policies, and reference lists, and pulls the closest existing material. This is where most of the time saving actually comes from — not from writing, but from not hunting through five years of folders for the last time you described your quality control process.
The tool adapts retrieved material to the specific requirement and the specific client. Done well, it produces a first draft that is on-topic and correctly structured. Done carelessly, it produces fluent text that answers a slightly different question than the one asked, which reviewers notice immediately.
A final pass against the requirement list: is every item addressed, is every form referenced, is any section over its page or word limit, has every addendum been acknowledged. Mechanical, tedious, and exactly the work that gets skipped at midnight.
This is the part contractors underinvest in. A tool retrieving from six well-written project case studies, current CVs and a maintained set of policies will produce useful drafts. The same tool retrieving from three old proposals and a folder of PDFs will produce vague text that reads exactly like vague text.
Practically, the highest-return preparation before buying any tool is assembling the library: two pages per completed project covering scope, value, duration, challenges and outcome; a current CV for every person you would ever name; your health and safety, quality and environmental policies; your insurance and bonding position; and a maintained reference list with permission to use each one.
Public bids are scored section by section against published criteria. If a criterion asks how you will manage the schedule and awards points for a named approach, a response that discusses your general project management philosophy scores badly even if it is better written. The response structure should mirror the evaluation structure so that an evaluator can find each scoring element without hunting.
A good tool supports this by drafting requirement by requirement rather than section by section. If yours produces a flowing narrative that has to be cut apart afterwards, you are doing more work, not less.
Worked example — one requirement, drafted properly
Requirement: "Describe your approach to managing subcontractors, including selection, coordination and payment. Maximum two pages. 10 points."
Extraction records: two pages, 10 points, three named sub-topics, so the response gets three sub-headings in that order.
Retrieval pulls your prequalification process from a past submission, your coordination approach from a method statement, and your payment practice from a policy document.
Drafting assembles these into a two-page response with the three sub-headings, adapted to this client's project type.
You then add the one thing no tool has: the specific, verifiable detail from a comparable project that makes the answer yours rather than anyone's. That paragraph is usually the difference between 6 and 9 points.
Every factual claim about your business, verified. The win themes and differentiators, which require knowing why this client is buying. The pricing, which is not a bid-writing question. And the final read, out loud if necessary, because fluent text hides omissions in a way that clumsy text does not.
Payment terms deserve a specific human read too. What the contract says about progress payments and disputes determines your working capital exposure; Treadstone's sister firm covers Ontario's prompt payment rules and deadlines and the adjudication path for payment disputes, which is worth understanding before you commit to a schedule of values.
The adjudication route above has its own clock, and it is short by construction-dispute standards. Once an adjudicator has received the documents required to start, the Construction Act gives them 30 days to issue a determination, extendable by up to 14 days only with the parties' written consent (s. 13.13(1)-(2)). A proposal team that treats the adjudication route as a fallback with no real deadline of its own is wrong by design — the Act built the process to be fast specifically so a payment dispute cannot turn into a second, slower negotiation.
For the earlier stages — finding and qualifying the opportunity — see can AI help you win more construction bids.
A 30-minute call is enough to tell you whether AI pays for itself here.
