Most onboarding email problems are not about tone or word choice. They are about structure. The email tries to do too many things, the client does not know what their one next action is, and nothing gets done.
The templates below are designed around a single principle: one email, one action. Each template has a clear subject line, a specific next step, and nothing else.
Use them as starting points. The language needs to match your firm's voice, but the structure should stay as close as possible to what is here — because the structure is what makes them work.
Template 1: Welcome and next steps
Send immediately after a proposal is accepted or an engagement is verbally confirmed, before the formal agreement is sent.
Subject: Welcome — next steps for your [matter type / project name]
Hi [Client Name],
We are glad to be working with you on [brief engagement description].
To get started, I have set up an onboarding portal where you will complete a few quick steps. It typically takes about 15 minutes and covers everything we need before work begins:
- your engagement details
- the engagement agreement to review and sign
- payment for the [retainer / deposit / first invoice]
- the documents we will need for [the first review / kickoff / phase one]
Your onboarding portal is here: [link]
If anything is unclear or you run into a question, reply to this email or call me directly at [phone].
[Your Name] [Title] [Firm Name]
What makes this work: It sets a clear expectation (15 minutes), names the exact steps, and provides a direct link. It does not bury the link or hide it in an attachment.
What to avoid: Do not write a two-paragraph history of your firm or a long description of the engagement here. That belongs in the proposal or engagement agreement. This email has one job: get the client to click the portal link.
Template 2: Engagement agreement send
For firms that send the engagement agreement separately from the portal invite, or who send it as a first step before the broader onboarding sequence.
Subject: Your engagement agreement — [Firm Name] / [Client Name]
Hi [Client Name],
Your engagement agreement is ready to review and sign.
[Link to document]
The agreement covers:
- the scope of our work on [matter type or project]
- our fee of [amount or billing structure]
- the terms for [retainer, deposit, or ongoing billing]
Review takes about 5 minutes. Once signed, we will follow up with the next step.
If you have a question about anything in the agreement, reply here or call me directly.
[Your Name]
What makes this work: It tells the client what the document covers before they open it. This reduces the time spent on "what am I signing?" conversations.
Variation for law firms: If you are sending a retainer agreement, add a sentence explaining whether the retainer is held in trust or earned on receipt, and what the replenishment threshold is. Clients who understand the retainer mechanics are less likely to raise questions about it later.
Template 3: Payment request
Send immediately after the engagement agreement is signed. Do not wait a day — the momentum of signing makes this the right moment.
Subject: Payment — [Firm Name] / [Client Name] — [Amount]
Hi [Client Name],
Thank you for signing the engagement agreement. The next step is the [retainer / deposit / first invoice payment] to open your matter.
Amount: [Dollar amount] What this covers: [One sentence: e.g., "This retainer will be held in trust and applied against billed fees."]
Pay here: [Payment link]
Once payment is confirmed, we will open your matter / begin scheduling your kickoff and send you a confirmation.
[Your Name]
What makes this work: It arrives at the exact right moment (right after signing), states the amount, explains what the payment covers, and tells the client what happens next.
Common mistake to avoid: Do not send this as a formal invoice with itemized line descriptions that mean nothing to the client. "Professional services — March" as a line item does not connect to the engagement they just confirmed. Use plain language about what the payment covers.
Template 4: Document request — initial
For firms or service lines where document collection is a separate step after agreement and payment.
Subject: Documents needed for [matter type / project name] — [Client Name]
Hi [Client Name],
To begin [reviewing your matter / preparing your tax return / kicking off the project], we need a few documents from you.
Please upload these to your portal by [date]:
- [Document name] — [one-sentence explanation of why you need it]
- [Document name] — [one-sentence explanation]
- [Document name] — [one-sentence explanation]
Upload here: [link]
If you have a question about any item, or if you do not have one of these available, reply and let me know before the deadline.
[Your Name]
What makes this work: Each document is named specifically, not grouped into vague categories. Each has a brief explanation. There is a deadline and a clear upload path.
For accountants: Adapt the list to match your specific service line. Monthly bookkeeping clients need bank statements and payroll data. Tax clients need prior-year returns and current-year source documents. Using this template once and adapting it per service type is much faster than writing new requests for every client.
Template 5: Document reminder — specific missing items
This replaces the generic "just following up" email that most firms send when documents are late.
Subject: Reminder: two items still pending — [Client Name]
Hi [Client Name],
We are still waiting on two items to proceed with [matter or engagement]:
- [Specific document name]
- [Specific document name]
Once those are uploaded, we are all set.
Upload here: [link]
If there is a problem getting either of these, reply and we will work around it.
[Your Name]
What makes this work: It names the exact missing items. The client does not have to re-read the original request to figure out what is still needed. The shorter and more specific the reminder, the more likely it is to get a response.
Template 6: Onboarding completion confirmation
Send when the client has completed all required onboarding steps and your internal review confirms the package is ready.
Subject: Onboarding complete — [Matter / Project name]
Hi [Client Name],
You are all set. Here is a summary of what we received:
✓ Engagement agreement — signed [date] ✓ Payment — received [date] ✓ Documents — all required items received
What happens next:
[Two or three sentences about the next internal milestone, e.g., "Your tax return will be in preparation and we will contact you if we need additional information. You can expect a draft return for your review by [date]."]
Your main contact for questions is [Name] at [email or phone].
Thank you for a smooth onboarding.
[Your Name]
What makes this work: It confirms every step, so the client knows you received everything. It sets an expectation for what happens next so there is no post-onboarding silence. It identifies the point of contact for future questions.
Template 7: Reminder when the portal link has not been opened
For clients who received the welcome email but have not accessed the portal within two to three business days.
Subject: Quick reminder — your onboarding portal is ready
Hi [Client Name],
I wanted to follow up on the portal link I sent on [date]. It usually takes about 15 minutes to complete and covers everything we need before we can begin.
Portal link: [link]
If you have run into a problem or a question, just reply here.
[Your Name]
What makes this work: It is short, non-judgmental, and re-states the time commitment (15 minutes). Clients often delay because they assume the onboarding will take longer than it does.
Template 8: Escalation — onboarding still incomplete after 7 days
For clients who have not responded to the portal link or the first reminder.
Subject: [Matter / Project Name] — next steps
Hi [Client Name],
We have not been able to begin work on [matter description] because the onboarding steps are not yet complete.
The following items are still open:
- [Specific item]
- [Specific item]
To keep the work on schedule, we need these completed by [specific date].
If you need help or if circumstances have changed, please reply directly so we can discuss.
[Your Name]
What this does: It creates urgency without being aggressive. It names specific missing items. It opens the door for the client to raise a real problem (maybe they cannot find a document, maybe the matter has changed) rather than just going silent.
Building your own template library
The eight templates above cover the core onboarding sequence. As you use them, you will develop variations for different practice areas or service types.
Keep your templates in a format that is easy for any team member to find and use — a shared document, a template library in your email client, or built into your portal platform. The goal is consistency: every client should receive the same quality of communication regardless of which team member sends it.
A few additional templates worth creating once you have the core set working:
- Out-of-office response for when the client reaches out during a holiday or vacation period
- Matter-specific intake confirmation with the exact documents received, by matter type
- Reschedule request for when a kickoff date needs to shift
- Engagement renewal for ongoing clients at the start of a new service period
