A client portal should start with five things. A secure login where each client sees only their own work, onboarding, files in one place, messages attached to the work, and a view of progress the client can check without asking you. Those five replace most of the "any update?" emails. Payments, approvals, extra user roles and integrations come next, and only when your process needs them.
This guide goes through each feature, what it replaces and when it's worth building. The examples come from portals we've built for a UK property company, a TikTok Shop academy and our own agency platform.
Start with the questions clients keep asking
Before you pick any features, look at your inbox. Most portals are there to answer three questions without anyone on your team having to reply.
- Where is my work up to?
- What do you need from me?
- Where is the file you sent last month?
If a feature doesn't help answer one of those, it can usually wait for version two.
The five features every portal needs
1. A secure login, with each client seeing only their own work
This is the one part that has to be right on day one. A client seeing another client's documents is the one mistake a portal can't make, so the access rules get designed and tested before anything else is built. Everything we build sits in your own accounts, so you own the data and the login system.
2. Onboarding
Onboarding replaces the welcome email, the intake form and all the follow-ups asking for missing details. A good flow collects details, documents and signatures in one go, and then shows the client what happens next. On our own agency platform, a new client starts onboarding from a single branded link.
3. Files in one place
Documents sent by email get lost in threads. In a portal, each file sits against the client and the piece of work it belongs to, so both sides can find the latest version. MRM Group's portal keeps documents per deal, with reminders and an audit history, because property deals have paperwork you need to be able to trace.
4. Messages attached to the work
A portal doesn't need a chat app. What it needs is messages that sit next to the task or deal they're about, so you're not piecing it together from WhatsApp, email and calls. When someone new joins the account, the history is already there.
5. Progress the client can see
A simple stage view showing what's done, what's happening now, what comes next and what's waiting on the client. This is the feature that cuts chasing the most. On our agency platform, delivery boards are shared between the agency team and each client, so both sides are looking at the same status.
Features to add when your process needs them
| Feature | Add it when | Example from our builds |
|---|---|---|
| Payments and subscriptions | Clients pay in stages, or you chase invoices by hand | TMMB Academy runs subscriptions and payments inside its portal |
| Approvals and sign-off | Work can't move until the client agrees to something | MRM Group's deal flow needs a signed agreement before payment |
| Several user roles | Different people need different views | TMMB Academy has six: admins, coaches, creators, sales, assistants and brands |
| Integrations | Your team types the same data into two systems | MRM Group's public funnel feeds straight into its CRM |
| Reporting | Clients keep asking how things are performing | Our agency platform reports ad results across Meta, Google Ads and GoHighLevel |
| AI features | Your team writes the same summaries again and again | Our platform turns a call summary into tasks and a draft follow-up email for a person to check |
Each of these adds build time, because each one needs its own screens, rules and testing. Our client portal pricing guide shows how they move the budget.
What to leave out of the first version
- Features copied from other software. A community feed or a points system looks good in a demo, but if your clients wouldn't use it, it's just cost.
- A native mobile app. For most businesses a portal that works well in a phone browser is enough. An app store listing adds review cycles and a second codebase to look after.
- Every integration at once. Connect the tools the first client path needs, and then add the rest once people are using the portal.
- Automatic decisions on sensitive work. Anything with money, legal documents or messages sent to clients in your name should keep a person in the loop. MRM Group's system keeps human approval at its sensitive financial and AI decision points for exactly this reason.
How far a portal can go
A portal can grow into the system a whole business runs on. TMMB Academy came to us with processes all over the place, rising software subscriptions and nothing linking the team to the customer from start to finish. Their portal now gives each of six roles its own workspace, covering onboarding, creator performance, subscriptions and payments, course modules, calls, messages and brand deals.
That build ran for more than 60 days. TMMB reports it was able to take on more capacity, improve retention and generate six figures within roughly two to three months (a client-reported result). You can read the full TMMB Academy case study.
Most businesses shouldn't start there. Start with the five basics, put them in front of real clients, and let the questions they still ask decide what comes next.
Custom portal or off-the-shelf software?
If your process is pretty standard and an existing tool already fits it without workarounds, off-the-shelf portal software is quicker and cheaper to start with. A custom portal makes sense when your process is specific to how you work, when several types of user need different views, or when the portal has to connect to systems you already rely on. There's more on what we build on our client portals page.
How to plan yours
- List the questions clients ask by email in a normal week.
- Map one client from signed to delivered, step by step.
- Mark every point where the client has to do something, like upload, approve or pay.
- List the tools those steps touch.
- Decide who needs access and what each person should see.
That list is most of a scope. Bring it to a discovery call and we'll send a written scope and price before anything is built.
