What Is Client Portal Invoicing?
Client portal invoicing is a system where customers log in to a secure portal to view, download, and pay invoices directly from their browser. Invoicr by MRVL builds this into a mobile invoicing app for UK sole traders, letting clients pay you bank-to-bank instead of by card, which cuts your payment costs from around 2.5% to under 1%.
The basics: what a client portal does
A client portal is a password-protected space where your customers access their invoices without needing to chase emails or dig through folders. When you send an invoice via a client portal, the customer gets a unique link, logs in (or views it instantly), and can settle payment in one place. For tradespeople and consultants sending dozens of invoices a month, this cuts admin time and improves cash flow because clients see what they owe clearly. In June 2026, most invoicing apps offer a basic portal; Invoicr's difference is that the payment method inside the portal is bank-to-bank open banking, not a card processor.
How Invoicr's client portal works
When you send an invoice through Invoicr, your client receives a secure portal link. They can view the invoice, download it as a PDF, and pay directly from their UK bank account using open banking. No card fees. On a £500 invoice, you keep an extra £8 because Invoicr's bank-to-bank fee (around 80p) is far lower than the £12.50 you'd lose to a card processor. The portal URL uses secret token authentication, so only the person with the link can access that invoice. You can resend the link via WhatsApp (Pro plan) or email, and clients can pay instantly or set a reminder to pay later.
Portal invoicing vs. traditional invoicing
Traditional invoicing means sending a PDF and asking the customer to ring you, transfer money manually, or log into a separate payment gateway. Portal invoicing centralises everything: invoice details, payment history, and the payment button all sit in one place. The customer clicks 'Pay Now', authenticates with their bank, and the money lands in your account. There's no waiting for cheques, no card fees eroding your margins, and no awkward payment conversations. For UK tradespeople like plumbers, electricians, and gardeners, this is especially useful because you're invoicing small businesses and homeowners who appreciate a frictionless process.
Who benefits most from client portals
UK sole traders, freelancers, and small business owners who send regular invoices benefit most. If you're billing five to fifty clients a month, a portal saves time and improves cash flow. Mobile mechanics, electricians, builders, consultants, and cleaners particularly gain because they invoice on the go from their phone and can't rely on desk-based accounting software. Small teams can use Invoicr's Business plan with 5 seats, so each team member can send invoices and access client payment history. If you're chasing unpaid invoices, Invoicr's automated payment reminders (Pro plan) reduce late payments without you sending follow-up emails.
Security and compliance in a client portal
Your clients' bank details never touch Invoicr or live in the portal. Open banking authentication happens directly between your client's bank and the payment processor, so Invoicr never sees their credentials. Each portal link is unique and time-limited, and invoice data is encrypted. For UK businesses, Invoicr handles VAT and Construction Industry Scheme (CIS) compliance on the Business plan, so your invoices are already tax-ready. If you work with an accountant, you can export invoice data directly from Invoicr so they have a clear audit trail.
Getting started with Invoicr's portal
You don't need to buy a separate portal tool. Invoicr's Free plan includes a client portal with bank-to-bank payments for up to 5 invoices a month and 3 customers. Pro (£9.99/month or £79.99/year) unlocks unlimited invoices, automated reminders, WhatsApp delivery, and quotes. Business (£19.99/month or £179.99/year) adds team seats and accountant export. Download the app, add your business details, create an invoice, and send it. Your client gets a portal link immediately. When they pay, the money goes to your UK bank account within 1-2 working days.
Start sending invoices with a built-in client portal today.
Frequently asked questions
Is client portal invoicing secure?
Yes. Your clients authenticate directly with their bank using open banking, so Invoicr never sees their bank details. Each portal link is unique and encrypted, and you control who can access which invoices.
How much does Invoicr's client portal cost?
The portal is included free on all Invoicr plans. The Free tier lets you send 5 invoices a month and manage 3 customers at no cost. Pro (£9.99/month) and Business (£19.99/month) add more invoices, team seats, and compliance features.
Can clients pay by card in the portal?
Invoicr's portal focuses on bank-to-bank payments via open banking, which saves you 60% on fees compared to card processors. This is the core feature that makes Invoicr unique for UK tradespeople.
What happens when a client pays through the portal?
The payment goes directly from their bank to your UK bank account in 1-2 working days. You get a notification, the invoice marks as paid, and Invoicr calculates your earnings automatically for tax reporting.
Can I send portal invoices via WhatsApp?
Yes, on Invoicr's Pro plan and above. You can send the portal link via WhatsApp, email, or SMS, so your client can access it however suits them best.
Does Invoicr work on mobile?
Yes, Invoicr is mobile-first. You can create invoices, manage clients, send portals, and track payments all from your phone. It's built for tradespeople on the go.