🤝 The Client Onboarding Pack Claude Writes In An Hour

I spent six years building the back ends of other people’s businesses, and here’s a trade secret from that time: the difference between a business that feels professional and one that feels chaotic is almost never talent. It’s onboarding. The client who gets a warm welcome email, a tidy questionnaire & a clear “here’s what happens next” relaxes and behaves beautifully. The client who gets radio silence after paying starts writing “just checking in!” emails by Thursday, and now you’re both anxious.

Agencies charge four figures to build onboarding packs. You can build yours with Claude in about an hour, and it’ll be better than the template ones, because it’ll be made of how you actually work.

Step 1: Get interviewed (~20 min)

Don’t ask Claude to “write an onboarding pack”. Generic in, generic out. Make it dig your process out of your head first:

Nick this one:

You're interviewing me so we can build my client onboarding pack out of how I actually work, rather than out of a template.

My business: [e.g. "bookkeeping for trades, mostly sole traders"]
My clients: [e.g. "electricians who've been doing their own books badly for years and are slightly embarrassed about it"]

Interview me one question at a time, waiting for each answer, and cover:
1. What I need from a client before I can start.
2. What always gets forgotten, by them or by me.
3. What new clients worry about in week one.
4. What I wish they knew on day one.
5. My payment terms, and how we'll actually communicate.

Rules: one question at a time, never a list. Push for specifics. If I say "I send them a form", I want to know what's on the form. Don't start writing the pack. Don't tell me my process sounds great.

When you've got the full picture, say so and stop, then give me my answers back as a document I can download.

Ask me up to three questions before you start.

Answer in voice mode while you potter. The questions will surface things you didn’t know were your process, and the “oh, and I always tell them about X” answers are the whole value of this step.

Step 2: Build the three pieces (~20 min)

Then this:

Build my client onboarding pack from the interview answers. Three pieces:

1. WELCOME EMAIL: warm, sounds like me, tells them they made a good decision without being smarmy. What happens next and when, what I need from them as a short list, and the one boundary I set gently upfront: [yours, e.g. "I answer WhatsApp between 9 and 5 on weekdays"]. Give me this as text I can paste straight into an email. Final version only, no options.
2. CLIENT QUESTIONNAIRE: ten questions maximum, and only ones whose answers I genuinely use. Easy ones first, the harder ones last.
3. MY KICKOFF CHECKLIST: internal, just for me. Every step from "they said yes" to "work started", including the ones I told you I always forget.
4. Then give me pieces 2 and 3 as one document I can download and reuse for every new client.

Rules: plain English, English spelling, no corporate cosplay, nothing about "onboarding journeys". Use my own words from the interview wherever you can. Don't invent a step of my process I didn't describe. Flag the gap and ask me instead.

Ask me anything you need to know first.

Step 3: The test that matters (~20 min)

Read all three as your most recent real client. At every line ask: would this have answered the question they actually emailed me in week one? Feed the gaps back: “add a line about parking”, “they always ask if VAT’s included, answer it before they ask”. Two rounds of this turns a good pack into a yours pack.

What this could look like

Say you’re a VA, and the interview surfaces that new clients stall in week one waiting on the same things: inbox access, the password handover, and an honest list of what “urgent” means to them. So your questionnaire asks for all of it upfront, with a kind sentence about why sorting access properly on day one saves a fortnight of “just chasing this”. Your welcome email tells clients exactly what the first week will look like. That’s the job of the pack: the questions you’d otherwise ask one chase at a time, asked once, before anyone’s waiting.

The honest bit

The pack is only as good as your interview honesty. If you describe the process you aspire to rather than the one you run, you’ve built a lovely pack for a business that doesn’t exist, and clients notice the gap fast. Anything with legal or money weight (contracts, deposits, cancellation terms) should get a proper once-over from a human who knows UK consumer rules; Claude drafts it well but it isn’t your solicitor & neither am I. And onboarding isn’t set-and-forget: every new client teaches you one line to add, so feed it. One small thing on the free plan: building documents uses your allowance faster than chatting does, so if Claude asks you to come back later, you haven’t broken it.

The one to do first

Just the interview, tonight, twenty minutes. Even if you never build the documents, hearing your own onboarding described back to you, gaps and all, is worth the twenty minutes on its own. Most people discover their “process” has been improvised fresh every single time.

That’s one pack, built out of your own process, that every new client from now on gets. The Claude Kickstart sets Claude up around your trade properly and hands over five more jobs like this one, sounding like you. £47, one weekend.