How do you write a project proposal with AI?

You write a project proposal with AI by opening Milli, our AI sales strategist at Sintra, and describing the project, the client, and the outcome you are proposing. Milli drafts a structured project proposal with a clear scope, deliverables, timeline, and pricing, ready for you to review and send.

Time to task completion: around 5 minutes per proposal.

What Milli can draft: Project proposals · Scope of work · Deliverables list · Pricing breakdowns · Timeline sections · Follow-up emails

Pricing: Milli is included with Sintra X at $15.60/mo billed yearly, with a 14-day money-back guarantee.

Write your first project proposal →

Setting up Milli to write project proposals

Most advice on how to write a project proposal stops at a template you still have to fill in. We built Milli to draft the whole thing from your brief instead. Its first draft is only as good as what it knows about your business, though, so we have you spend a few minutes on setup first.

1. Sign up and open Milli. Create your account at sintra.ai, select Milli from the Helpers list, and you land in a chat interface ready to start drafting project proposals.
2. Set up Brain AI. Upload your company details, service descriptions, standard pricing, and any past project proposals you rate to Brain AI. Milli pulls from this every time, so your proposals reflect your actual offer rather than a generic template.
3. Brief Milli on the client and the project. Have the client's name, their problem, your proposed solution, the deliverables, the timeline, and the price ready before you start. The more specific the brief, the less revision the first draft needs.
4. Review and send from your own platform. Milli drafts the project proposal content for you. Copy it into your preferred document or proposal tool, make any final adjustments, and send it yourself.

Start your 14-day free trial →

How to write a project proposal with Milli, step by step

The steps below follow the real workflow from briefing Milli to sending a finished project proposal. Each one shows what you give Milli and what you get back.

Step 1: How do you brief Milli on the project proposal?

Start by telling Milli who the proposal is for, what problem you are solving, what you are delivering, and what the investment is. A complete brief produces a first draft that needs minimal editing.

Prompt: Write a project proposal for a brand identity project. The client is a boutique hotel group launching a new property. Deliverables: logo, colour palette, typography system, and brand guidelines document. Timeline: 6 weeks. Budget: €4,200. Tone should be professional but creative.

Output: A complete project proposal with an executive summary, problem statement, proposed solution, deliverables list, timeline, pricing, and a closing next step, ready to copy into your document tool and send.

Step 2: How does Milli write a clear scope of work?

Tell Milli the deliverables, the timeline, and what is explicitly out of scope, and it builds a scope section that protects you from scope creep and gives the client a clear picture of what they are buying.

Prompt: Write the scope of work section for a website redesign project. Deliverables: 8-page website, mobile-optimised, CMS setup, and one round of revisions. Timeline: 8 weeks. Out of scope: copywriting, photography, and ongoing maintenance.

Output: A scoped deliverables section with inclusions, exclusions, and a phase breakdown, clear enough that the client knows exactly what they are approving.

Step 3: How does Milli frame the pricing section of a project proposal?

Tell Milli the figures and the value behind them, and it presents the investment in a way that justifies the cost before the client ever reaches the number.

Prompt: Write the pricing section for a 3-month paid social campaign at €3,500/month management fee plus ad spend. Justify the investment by referencing expected outcomes: increased reach, lower cost-per-click, and weekly performance reporting. Frame it as an ROI decision.

Output: A pricing section that leads with value, presents the figures clearly, and frames the investment as a return, ready to drop into the project proposal body.

Step 4: How do you write a project proposal example for a specific industry?

Give Milli the industry context and it adapts the language, structure, and framing to match what decision-makers in that space expect to see.

Prompt: Write a project proposal for a digital marketing agency pitching a 6-month SEO project to a B2B SaaS company. Deliverables: technical audit, content strategy, on-page optimisation, and monthly reporting. Fee: €2,200/month. Include KPIs.

Output: An industry-specific project proposal with relevant KPIs, a clear deliverables structure, and a pricing section suited to a SaaS client, ready to use as a template or send directly.

Step 5: How do you write a project proposal for a multi-phase project?

Give Milli the phase breakdown and it structures the proposal so the client can see exactly what happens when, and approve phases individually if needed.

Prompt: Write a project proposal for a 3-phase e-commerce build. Phase 1: discovery and wireframes, 3 weeks, €2,000. Phase 2: design and development, 8 weeks, €7,500. Phase 3: testing and launch, 2 weeks, €1,500. Total: €11,000.

Output: A phase-by-phase project proposal with a timeline, per-phase deliverables, and a total investment summary, structured for a client who needs to approve or fund in stages.

Step 6: How do you follow up after sending a project proposal?

Give Milli the context and the timing, and it drafts a follow-up that keeps the project moving without sounding pushy.

Prompt: Write a follow-up email for a project proposal I sent 5 days ago to a retail client for a POS system integration project. No reply yet. Keep it brief, professional, and end with a soft ask for a call this week.

Output: A concise follow-up email that references the proposal and closes with a low-friction next step, ready to copy and send from your email platform.

Writing project proposals manually vs. with Milli

From scope to pricing to follow-up, project writing eats hours by hand. Here is the trade-off as we see it.

Tips for writing better project proposals with AI

A few habits separate a proposal that gets signed from one that gets ignored.

Brief Milli on the client, not just the project. The strongest project proposals are written for a specific person with a specific problem, so tell Milli who the decision-maker is, what they care about, and what objections they are likely to raise. A proposal written for a CTO reads very differently from one written for a Head of Operations.

Set up Brain AI with your standard deliverables and pricing. Upload your service descriptions, pricing tiers, and any past project proposals you rate, and Milli uses them as the baseline for every draft. That means less time correcting figures and more time refining the pitch.

Define the scope before you write anything else. Scope creep starts at the proposal stage, so give Milli both what is included and what is not. A clear exclusions section sets client expectations before the project starts and protects you if a dispute arises later.

Use Milli to prep for the negotiation too. Once the proposal is drafted, ask Milli to outline the likely objections and your response to each. A client who pushes back on price or timeline is easier to handle when you have already thought through the counteroffers.

Draft the follow-up at the same time as the proposal. Most business proposals that fail do so in the silence after they are sent, when nobody follows up. Ask Milli to write the follow-up email in the same session, and have it ready before the proposal even goes out.

Write your first project proposal in under 10 minutes

We built Milli for exactly this: structured, client-ready project proposals from a plain-language brief, covering scope of work, deliverables, pricing, and follow-ups in one session. Knowing how to write a proposal is part craft and part structure, and Milli takes care of the structure every effective business proposal needs. Brief it, review the draft, copy it into your document tool, and send.

Start your 14-day free trial →

14-day money-back guarantee. Cancel anytime, no questions asked

Project proposal writing checklist

Each section below stands on its own, so you can run the stage you are on with or without Milli, from the brief through to chasing the outcome.