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The Marketing Agency Client Onboarding Checklist

Published July 22, 2026 by Connor Bearse

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A marketing agency client onboarding checklist should begin after the client signs and end when the team has enough information, access, and ownership to start delivery. It should tell your team what to prepare and tell the client what they need to do next.

If every internal setup task appears in the client’s welcome message, onboarding feels like a transfer of administrative work. If the team hides every step, the client cannot tell what is missing or why work has not started.

Adjust the channel-specific details for paid media, search engine optimization (SEO), content, design, or web projects, but keep the ownership and handoffs explicit.

1. Confirm the scope and owners internally

Start with the source documents your agency already approved. The proposal, agreement, or statement of work should define the services and boundaries. Your onboarding system should translate that decision into work, not replace the contract process.

Complete these checks before sending the client a portal invitation:

The client needs a concise summary of roles and next actions. Your team also needs private context about staffing, margin, risk, and internal review. Keep those two views separate from the start.

2. Prepare the client account and portal access

Create one client account, the workspace for this client relationship. Use it to hold the engagement’s Requests, Tasks, and Files. Add the team members who need access, then add the client contacts who should enter the portal.

Check the client-facing experience before sending an invitation:

In Sydnee, a portal user signs in with their email and a five-digit code sent to that address. They do not create a portal password. Access still varies by module, folder, board, section, task, and conversation, so portal membership should not be treated as permission to see the whole account.

3. Collect information and assets through one Request

Choose one structured intake path instead of accepting required answers across forms, chat, and email. A Request in Sydnee is a client-facing form connected to a client account. It can collect structured answers, files, and signature responses, but it is not a contract or e-signature platform.

Build the Request around what the first stage of delivery needs:

When clients upload files through Request fields, Sydnee stores them in the account’s Files system. Other answers remain with the Request response. Completing the Request does not create a Task automatically, so name the person who reviews the response and starts the next step.

The client intake form framework explains how to use conditional paths without turning the form into a knowledge dump. The broader Sydnee Requests overview shows the team and client experience.

4. Turn the signed scope into owned Tasks

The work plan should convert the engagement into actions with owners, dates, and client visibility. Avoid copying the proposal into one large task. Create a plan your team can operate.

Review the task structure with these checks:

A Task template can supply a reusable plan, but the team should still review assignees, dates, priority, and client access for this engagement. A completed Request does not become a Task, and a completed Task does not publish finished work.

5. Organize Files before uploads begin

Define where working material, client uploads, reviews, and finished work belong. A prepared structure prevents every team member from inventing a new folder name during the engagement.

Use a small set of recognizable destinations:

Then review access at the folder level. A client may need full access to an upload folder, view-only access to review material, and no access to internal working files. Do not assume one account-wide setting controls every file and folder.

6. Set communication expectations before kickoff

Tell the client what belongs in the portal and what still belongs in a meeting or email. The rule should be short enough for both teams to remember.

For example:

The tool matters less than the routing rule. If every channel counts as the official record, your account lead must reconcile the same decision across several places.

7. Run a kickoff readiness check

A scheduled kickoff call does not mean the engagement is ready to begin. Review the dependencies before the meeting so the conversation can focus on decisions instead of missing logistics.

Confirm the following:

Do not mark onboarding complete because the welcome email was sent. Mark it complete when the next stage has the inputs, owner, and client expectation it needs.

8. Make the transition into delivery explicit

End onboarding with a named handoff. The account lead should confirm what the team received, what remains open, and which Task starts active delivery. The client should know where to follow visible work and where completed files will appear.

The connected client portal workflow maps the full path from intake through active work. When the work is complete, the agency can publish a finished Files folder as a Deliverable, a view-only presentation clients can browse and download in their portal. The client file delivery guide covers that final handoff.

Your onboarding checklist has done its job when it creates a controlled transition into delivery. It should not try to run the entire engagement.

If you want to test this checklist against your agency’s intake, permissions, and delivery process, book a Sydnee demo.

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