Auto-Draft Proposals From a Google Doc Template in 30 Minutes

The build: fill out a 6-question brief form, get a Google Doc proposal generated from your template with personalized sections, ready to review and send.

Total time: 30 minutes.

What you'll need

• A Google Doc proposal template (your existing one is fine)
• Tally or Typeform for the brief
• n8n
• Google Docs API (via Google service account)
• AI API key

Step 1: Audit your template (5 min)

Open your existing proposal template in Google Docs. Identify the sections that change per proposal:

• Client name
• Problem statement
• Approach
• Deliverables
• Timeline
• Investment

Mark these in your template with placeholders like {{client_name}}, {{problem_statement}}, etc.

If your template doesn't have a clear structure, fix that first. AI can't generate good content from a chaotic template.

Step 2: Create the brief form (5 min)

In Tally, build a 6-question form:

1. Client name
2. What's their problem (in their words, paste from emails)
3. What's the scope (high-level)
4. What's the timeline (rough)
5. What's the budget range (rough)
6. Any constraints or unique context

Step 3: Webhook to n8n (2 min)

Point the Tally webhook at an n8n Webhook trigger.

Step 4: Generate each section with AI (10 min)

Add an AI node. Generate each variable section with a separate prompt for tone consistency.

Example for the problem statement:

Write the "Problem" section of a consulting proposal.

Client: {{ name }}
Their problem (in their words): {{ problem_raw }}
Industry context: {{ industry }}

Format: 2 paragraphs.
- Paragraph 1: restate their problem in clear, professional language (their voice, sharpened)
- Paragraph 2: the cost of NOT solving it (specific, not generic)

Length: 120-180 words total. Match the tone of these examples: {2-3 SAMPLES_FROM_YOUR_BEST_PROPOSALS}.

Banned phrases: "in today's fast-paced environment", "leverage", "synergize", "robust", "seamless", "paradigm".

Do similar for approach, deliverables, timeline, investment.

Step 5: Generate Google Doc (5 min)

Add a Google Docs node in n8n. Use the "Create from template" action.

Pass each AI-generated section as a variable replacement.

The output is a new Google Doc with all placeholders filled in.

Step 6: Notify (3 min)

Add a Slack notification (or email) with the link to the generated doc.

Format:

:memo: Draft proposal generated for *{{ name }}*

Review and edit: {{ doc_url }}

Common gotchas

• Google service account permissions: the service account needs edit access to the template doc. Create one in Google Cloud Console, share the template with the service account email.
• Placeholders are case-sensitive in some Google Docs replacement tools. Be consistent.
• Long AI outputs occasionally include markdown formatting (headers, bullets) that doesn't render in Google Docs. Add a "plain text only" instruction to each prompt.

What I do with this

A new client conversation usually wraps with "I'll send a proposal by tomorrow." Before this system, that meant 45 minutes of writing.

Now I fill the form on the train. Open the generated doc when I'm at my desk. Edit for 8-12 minutes. Send.

The AI does the structure and the boring parts. I keep editorial control over the parts that matter.

What to add next

• Multiple template versions (small engagement, large engagement, retainer)
• Auto-generated SOW alongside the proposal
• Calendly link insertion based on engagement type
• E-sign integration (HelloSign, DocuSign)

Don't over-engineer. The 6-question form to a draft doc is 80% of the value.