As of 13 August 2026, AI can write a sales proposal.

What to actually do

1. Use a tool built for this

   The route this page recommends

2. Do it yourself

   Second choice

   A chat interface, chat-fluent skill, and roughly 30 minutes until you can act on the result.

   How to actually do it

   1. Open your latest customer brief, meeting notes and email thread, then gather the buyer’s problem, objectives, decision criteria, stakeholders and deadline.
   2. Open your current service description, case studies, credentials, delivery plan, price list and standard terms, and remove any material that is out of date.
   3. Paste the supplied information into the prompt under the matching headings, including whether each price is inclusive or exclusive of VAT, and mark anything unknown as missing.
   4. Paste the completed prompt into a chatbot and ask it to produce the proposal without inventing facts, prices, dates, results or terms.
   5. Compare every factual claim, deliverable, timescale, price, VAT statement, assumption and exclusion in the draft against your source documents and replace each [NEEDS CONFIRMING] item.
   6. Ask a colleague who understands the opportunity to check whether the proposal answers the buyer’s stated decision criteria and whether any promise is too broad.
   7. Paste the checked text into your normal document template, add the correct contact details and branding, then send it through your usual approval and delivery process.

   Prompt

   Write a polished sales proposal for my UK business using only the information supplied below.
   
   Customer and opportunity:
   [customer name, organisation, sector, problem, objectives, decision criteria and deadline]
   
   Our business:
   [business name, relevant experience, capabilities and differentiators]
   
   Proposed solution:
   [scope, deliverables, implementation approach, timescales and customer responsibilities]
   
   Commercial information:
   [price, VAT treatment, payment schedule, renewal terms, expenses and validity period]
   
   Evidence:
   [case studies, results, testimonials, accreditations and references]
   
   Terms and constraints:
   [contract terms, exclusions, assumptions, service levels, data handling and any required wording]
   
   Create a proposal with these sections: executive summary, understanding of the customer’s needs, proposed solution, deliverables, approach and timetable, relevant evidence, commercial proposal, assumptions and exclusions, next steps, and contact details.
   
   Use clear UK English and a confident but factual tone. Tailor the proposal to the customer rather than describing generic benefits. Do not invent facts, results, credentials, prices, dates, guarantees or legal terms. Do not strengthen a claim beyond the evidence supplied. Where information is missing, write [NEEDS CONFIRMING] and list the missing item after the proposal. Keep the commercial wording separate from any contractual wording. Preserve all supplied prices and terms exactly, including whether VAT is included or excluded. Make the document easy to paste into a word processor, with useful headings and concise paragraphs.

   Open it prefilled in ChatGPT or Claude, or copy it into Gemini, which takes no prefill link.

3. Hand it to a person

   The distant third

   A person who owns the outcome does this end to end, worth it when the failure is dear.