Custom software for accountancy and bookkeeping firms, without replacing your existing accounting package. We build the client portal, the workflow layer, the reporting dashboard and the productivity tools that sit alongside Exact, Twinfield, AFAS or CaseWare and help your firm run more efficiently.
Powerful off-the-shelf packages already exist for bookkeeping itself: Exact Online, Twinfield, AFAS Profit, Snelstart, Yuki, and the annual reporting and consolidation tools from CaseWare and Visionplanner all do their job well. We have no interest in competing with them. Building your own accounting software for accountancy firms is a multi-year project, does not scale economically, and rarely delivers anything fundamentally better than what is already on the market. What our work does solve is everything around it: the client portal for your clients, the internal workflow from onboarding to file closure, the reporting dashboard that brings together live data from multiple sources, and the productivity tools your consultants and assistants use every day.
For administration firms and mid-market accountancy firms, roughly five to fifty staff, with or without a tax and advisory practice, this is often where the gains lie. Your bookkeeping software is not the bottleneck. The back-and-forth with clients, collecting annual accounts, monitoring capacity and turnaround times, managing your Wwft files and reporting to partners and clients are. That is where we deliver custom software development, built around your existing stack, not alongside it and certainly not instead of it.
The software for accountants that we build therefore always works alongside your existing package. Whether you run entirely on Exact, use a mix of Twinfield for some clients and AFAS for others, or work with Yuki and Snelstart for certain services, the client portal and workflow layer sit on top and pull data from every source into a single unified view. For most firms, this is where the real time saving lies: one place where partners, consultants and clients all look, instead of four different interfaces and a shared Outlook mailbox.
Most projects start with one of these three and grow organically from there. In the first conversation, we advise which option will deliver the most value for your firm.
A secure, private environment in which your clients upload VAT returns, view annual accounts, access the audit file, track the status of outstanding invoices and review your consultants' timesheets. Branded to your look and feel, with SSO and clear role separation between the managing director, controller and accountant on the client side. Clients see only what they are permitted to see, partners stay in control of what is shared, and everything that passes back and forth sits in one searchable file instead of being scattered across mail folders.
The software that drives your internal process: client onboarding with Wwft checks, case planning, capacity and staff allocation, progress tracking per client and automatic case closure. Includes a workload overview for partners, so it is clear where the capacity pressure lies and which cases risk missing their deadlines. The workflow runs from the very first contact with a prospect — KvK check, UBO enquiry, PEP and sanctions list screening — right through to final invoicing and archiving of the client file in line with the retention period.
A dashboard with live data from Exact, Twinfield, AFAS, Snelstart or Yuki, combined with your time recording, planning and invoicing. Productivity apps for consultants (timesheets, client time tracking, mobile document scanning), automatic invoicing based on hours booked, and compliance reports for partners and regulators. For firms with multiple offices, reports can be delivered per office, per partner or consolidated, with drill-down to the underlying case, without anyone needing to dig into the accounting software itself.
A production-ready software environment that connects seamlessly with your existing packages, plus everything around it so you can manage it yourselves or have your IT partner manage it.
Four patterns we see again and again among firms that contact us. If you recognise one of them, we would be happy to talk further.
Every period you send dozens of emails with attachments back and forth. Documents get lost, versions get mixed up, and nobody is sure which version of the annual accounts is the latest. Clients complain they hear nothing back; consultants complain they have asked for the same document three times. A client portal with status tracking solves this structurally.
You don't know exactly what your consultants are working on, which cases are falling behind, or who has room for new clients or new engagements. Standard packages don't give you that cross-section; custom reporting does, with daily refreshes and alerts when a case is approaching its deadline without the right people assigned to it.
You currently handle client onboarding, periodic reviews and keeping the Wwft file in Excel or loose Word documents. An audit by the regulator or your own quality control takes an enormous amount of time. An integrated Wwft flow with automatic alerts and a searchable audit trail turns such a review into a matter of hours rather than weeks of preparation.
What was still manageable by hand with fifty clients starts to break down beyond a hundred. Self-service for clients, automated alerts, automatic invoice follow-up and a workload dashboard then become a necessity rather than a luxury. Growing without taking on a proportionate amount of back-office staff calls for software that scales with you.
With OneDayBuild, we turn your idea into something tangible in one day for €1,150, so you can see whether further development is worth the investment. Decide to go ahead with the full build? Then we credit the full cost.
Explore OneDayBuild →A conversation in which we understand which packages you currently use, which processes are causing friction, which client segments you serve and which compliance requirements apply (Wwft (Dutch anti-money laundering act), GDPR, and any sector-specific quality rules). We also map out which integrations we will need, such as Exact Online, Twinfield, AFAS or a combination.
A workshop with the partners and a round of short interviews with consultants and a few clients. We map out the current process flows and identify where custom software adds value and where standard software is perfectly adequate. At the end, you have a concrete scope, a sprint plan and an initial screen flow for the client portal or the workflow component.
We work in two-week sprints and deliver a working, testable version at the end of each one. One consultant from your firm acts as product owner, and one partner acts as the sponsor. External users, your first clients, get access early so we can test the portal flow with real data rather than only at go-live. The first tier is ready after a few sprints; a fully production-ready platform takes several sprints. At the end of each sprint there is a short demo for the partners and a preview of the next sprint, so the direction can be adjusted deliberately rather than only in hindsight.
A phased rollout to your consultants and then to your clients. We usually start with a pilot group of five to ten clients so we can fine-tune the portal flow before the whole portfolio moves over. Training for key users within the firm and a short video introduction for clients. From go-live onwards, we handle monitoring, security patches, integration upkeep and ongoing development based on what your staff and clients encounter in practice. In the first months after go-live, we schedule brief review sessions with the partners, so that changes that make the firm more productive go straight into the next sprint.
The questions that partners and office managers most often ask us before a project begins.
A no-obligation introductory call of half an hour. We listen to how your firm currently operates, which packages you use and where the pain points are, and we give you direction you can act on straight away, even if we ultimately don't work together.
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