Client portal for tax advisors: Does your firm really need one?

The promises are concrete: less email chaos, automatic document reminders, structured task allocation, all in one place. For many law firm owners, that sounds like the solution to a real problem. And that is exactly where it is worth taking a closer look. Because the real question is not whether client portals offer useful features. It is whether a portal is the right tool for the problem you actually have.

The problem is real, but the solution is not automatically a portal

Most law firms considering a client portal are struggling with one of two problems. Either communication with clients is unstructured: documents arrive by email, WhatsApp, phone, or in a document exchange folder. Follow-up questions disappear into the void. Responsibilities are unclear. Or the firm has communication basically under control, but is looking for a way to involve clients more strongly in the process, for example through task lists, status indicators, or digital approvals.

Both problems are legitimate. But a client portal only solves them if clients actually use it. And that is exactly where the weakness lies, a weakness that is rarely discussed in vendors' product messaging.

The adoption question that nobody asks

A client portal means an additional system change for every client. A new login, a new interface, new habits. For the managing director of a mid-sized company who is already working with ERP, CRM, a banking portal, email, and DATEV Unternehmen Online, one more tool is not a relief. It is an additional burden.

On the law firm side, things do not look better. Introducing a portal requires internal training, process adjustments, and ongoing maintenance. If clients do not use the portal consistently, a parallel operation emerges: some clients work in the portal, others continue via email. The firm has to serve both channels and loses exactly the efficiency the portal was supposed to deliver.

The question that should come before every portal decision is therefore not "Which portal is the best?" but "Will our clients use it?" And if so: all of them or only a fraction?

What clients actually need

The idea behind the client portal is understandable: clients should feel well supported, keep track of things, and know what is expected of them. Transparency, control, reliability.

But these things can be achieved in different ways. A client who receives a clear, well-structured email with specific tasks and deadlines feels better supported than one who is invited into a portal that they open once per quarter. The quality of communication beats the medium.

For clients on the business side, that is CFOs, finance teams, or managing directors, what matters above all is: Do I know what is happening right now? Do I know what I need to provide? Can I trust that nothing will fall through the cracks? No portal in the world answers these questions if the processes behind it are not right.

Three ways to improve client communication

Instead of introducing a portal across the board, law firms should honestly assess their situation. Depending on the starting point, different solutions emerge.

Path 1: No portal, but clean processes via DATEV and email

For firms that have already implemented DATEV Unternehmen Online well and whose clients actively upload documents there, process payments, and view reports, often less is missing than one might think. DUO covers document exchange, preliminary recording, and basic communication functions. What remains is coordinating tasks and follow-up questions, and in many cases a well-structured email communication is enough for that.

Concretely, this means emails with clear subject lines, unambiguous tasks, specific deadlines, and a fixed contact person. No prose, no novels, but short, action-oriented messages. Supplemented by internal templates and consistent deadline tracking on the firm side, this can achieve a high level of service without requiring the client to operate an additional system.

This approach works especially well for clients who already work digitally and whose document processes run through DUO or connected pre-systems such as lexoffice, sevDesk, or FastBill. Here, a portal adds hardly any value but creates additional complexity.

Path 2: A client portal designed specifically for tax advisory work

Providers such as Kanzleiland, KanzleiDrive, Taxaro, or KanzleiFlow offer functions tailored to everyday law firm work: checklists for missing documents, task management, document approval, communication in one place. Many of these solutions integrate into the DATEV world via interfaces.

The advantage: these portals are designed around the language and logic of tax advisory services. The disadvantages, however, are not trivial. Most portals are closed systems. The client has to log in there actively to see a task or upload a document. There is no true omnichannel character, meaning no way to meet clients where they already are, such as in their email inbox or messenger. Anyone who does not check the portal regularly misses tasks. And experience shows: that is exactly what happens with a significant share of clients.

In addition, these portals are often limited in their configurability. Firms with their own processes, specific workflows, or special client groups quickly run into the limits of the standard setup.

Path 3: An omnichannel ticketing system as infrastructure

The third path is the least obvious, but possibly the most future-proof. Instead of buying a portal that clients have to come to, this approach reverses the logic: the firm builds a communication infrastructure that reaches the client where they already are.

Tools like Intercom or Pylon, which are established in B2B customer service, offer exactly that: a unified ticketing system on the firm side that brings together email, chat, web forms, and potentially additional channels in the future. The client notices little of this. They continue to send an email or use a contact form on the firm’s website. The firm, meanwhile, sees all cases in a structured interface, can assign tasks, set deadlines, and track status.

The key difference: the client is not forced to learn a new system. The complexity sits on the firm side, where it belongs. At the same time, these tools offer a high degree of configurability, AI-supported automation (for example, automatic categorization of inquiries or draft responses), and clear scalability. As the firm grows, the system grows with it.

For firms that want to bring their client communication up to a professional level without burdening clients with an additional login, this path is a serious alternative. Those who think one step further can also offer an optional client portal on the basis of such tools, a self-service dashboard that clients can use, but do not have to.

When a portal makes sense, and when it does not

The decision for or against a client portal is not a matter of principle, but an operational one. It depends on the client structure, the level of digitization, and both sides' willingness to invest in a new system.

A portal tends to make sense when the firm serves many clients with recurring, standardizable processes. It makes less sense when clients are already well connected via DUO and communication consists primarily of individual follow-up questions and advisory meetings.

In any case, one thing is true: a portal does not solve a process problem. If internal workflows are unclear, responsibilities change, and deadlines are not tracked, a portal will not eliminate these issues. It will make them more visible, which can be seen as an advantage, but only if the firm is prepared to address the root causes.

Taking the client’s perspective seriously

One thing stands out in the discussion about client portals: the client’s perspective is often neglected. The argument usually follows the law firm’s logic: fewer emails, automatic reminders, everything in one place. Those are advantages for the firm, not necessarily for the client.

For the CFO of a mid-sized company, working with a tax advisor is just one of many working relationships. They do not expect a platform; they expect results. The right advice at the right time. Clarity about what they need to provide and by when. Confidence that their tax matters are being handled professionally. These expectations can be met with a portal, but just as well without one. What matters is not the tool, but the way the firm communicates, follows up, and organizes its work.

So before you invest in a portal, ask yourself an honest question: Would I, as a client, open this portal regularly? Or would I prefer my tax advisor simply telling me clearly what they need?