How to Set Up a Customer Portal for Your Small Business

Written by Calvin Lo, Founder of Aphelios Software | July 2026 | 8 min read

Setting up a customer portal for your UK small business is simpler than you might think. With the right software, you can give customers self-service access to invoices, orders and account information in minutes.

This step-by-step guide walks you through everything you need to do, from choosing the right software to getting your first customers logged in.

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Before You Start: What You Need

Before setting up a customer portal, make sure you have:

• A business software system that includes a customer portal or integrates with one.
• Customer records with email addresses for everyone you want to invite.
• Invoices and orders already recorded in your system (the portal shows existing data).
• A domain or website where customers can access the portal (your software provider should host this).

If you use Aphelios Software, everything is already in place. The portal is built into the platform and you do not need any additional setup.

Step 1: Choose the Right Software

Your customer portal should integrate with your existing business systems. If you use inventory management, invoicing and POS software, choose a portal that connects directly so customer data stays in sync automatically.

Here is what to look for when evaluating options:

• Built-in integration – The portal should work with your existing software, not require a separate system.
• Automatic synchronisation – Invoices and orders should appear in the portal immediately without manual publishing.
• Secure authentication – Look for passwordless magic-link login rather than traditional passwords.
• Branding options – The portal should reflect your business identity with your logo and colours.
• Mobile friendly – Customers will access the portal from phones and tablets as well as desktop computers.
• Staff isolation – The portal must be completely separate from your internal staff systems.

Step 2: Enable the Portal

With Aphelios Software, the Customer Portal is built in. You do not need any additional setup. Simply go to any customer record and send them a portal invitation. They will receive a secure magic link via email.

If you are using a different software provider, follow their instructions to activate the portal feature. This usually involves enabling the portal in your settings and configuring the basic appearance.

During this step, you will typically:

• Configure your company name, logo and branding colours.
• Set the portal URL or subdomain where customers will log in.
• Choose which features to enable (invoices, orders, profile management, etc.).
• Test the portal to make sure it displays correctly before inviting customers.

Step 3: Invite Your Customers

Send portal invitations to your customers from their profile page. Each invitation includes a secure link that expires in 7 days. When customers click the link, they set up their portal access instantly.

Tips for inviting customers:

• Start with your most active customers – They will benefit most from portal access and are likely to adopt it quickly.
• Explain the benefits – Tell customers what they can do in the portal and why it is convenient for them.
• Send a follow-up – If a customer does not respond to the initial invitation, send a gentle reminder after a few days.
• Offer help – Let customers know they can contact your team if they have trouble logging in.

Step 4: Customers Log In

Returning customers go to the portal login page, enter their email and receive a magic link. No passwords needed. The link expires after 15 minutes and can only be used once for security.

The login process works like this:

1. Customer visits the portal login page.
2. They enter their email address.
3. An email with a secure link is sent to their inbox.
4. They click the link and are immediately logged into the portal.
5. No password to create, remember or reset.

Step 5: Customers Self-Serve

Once logged in, customers can view invoices, download PDFs, check order history and update their profile. Everything is available 24/7 from any device.

The portal experience should be intuitive and focused. Customers can see their recent invoices and orders at a glance, with the ability to search and filter by date. They can download PDF copies of any invoice for their records. They can also update their contact details, which are automatically synced back to your main business system.

Best Practices for Portal Adoption

Make it visible

Add a portal link to your website, email signature, invoices and receipts. The more places customers see the link, the more likely they are to use it.

Train your team

Make sure every team member knows about the portal and can explain its benefits to customers. When a customer calls to ask for an invoice, your team can say "you can find that in the portal" and guide them through the process.

Monitor and improve

Track portal usage and gather feedback from customers. If customers are not using certain features, find out why and make improvements. The portal should evolve based on what your customers actually need.

Troubleshooting Common Issues

Customer did not receive the invitation email

Check that the email address is correct and ask the customer to check their spam folder. You can resend the invitation from their customer profile.

Magic link does not work

Magic links expire after 15 minutes for security. Ask the customer to request a new link. If the problem persists, check that their email address is correct in your system.

Customer cannot see their invoices

Make sure the invoices are recorded in your business system and are linked to the correct customer record. Only invoices linked to the customer's profile will appear in the portal.