Thomson Reuters is closing FileCabinet CS on 31 December 2027. After that date there are no more updates and no more support, and continued access to your files is not guaranteed. If your firm has run client documents through the cabinet for years, that is a confronting sentence to read. The good news is that the deadline is also an opportunity. You get to choose where your firm lands next, and you get to do it on your own terms instead of scrambling at the end.
This is a practical look at what the sunset actually means, why the runway is shorter than the date suggests, and what a modern alternative looks like if you want your files to stay yours.
The deadline is firm, and the runway is shorter than it looks
It is easy to look at “31 December 2027” and feel like there is plenty of time. There isn’t, and here is why.
No firm migrates mid season. Tax time is sacred, and nobody is moving their entire document system while returns are going out the door. That reality quietly removes most of the calendar. What you are really left with is two sensible windows: sometime in 2026, or the middle of 2027. After that, the cabinet closes.
The other catch is that FileCabinet CS has no bulk export. It moves client by client, by hand. So every month you wait is more manual work later, done under more pressure, by a team that has less time. The clean exits are the ones that happen well outside busy season, with room to breathe.
Most firms had outgrown the cabinet anyway
The sunset is the prompt, but it is not the whole story. Plenty of firms had already bumped up against the limits of FileCabinet CS long before the retirement date was announced.
The 100GB storage ceiling is the one most people hit first. Growing firms reach it within a few years and then start spending real time managing storage instead of serving clients. There is also the fact that it was built for the office, not for the hybrid way firms actually work now, and users report lag when printing and loading documents even on strong hardware.
Thomson Reuters will point you toward Onvio as the natural next step. Worth knowing before you go that way: firms report a clunky client portal and thin workflow, and moving to Onvio is still a full migration. If you are going to do the work of moving anyway, it makes sense to spend that effort on a genuine step up rather than a sideways shuffle.
What “somewhere better” actually means
This is the part that matters. You do not have to trade one closed system for another. SuiteFiles is an intelligent workspace built on the Microsoft 365 your firm already pays for, and it changes the answer to a few questions that FileCabinet CS could never answer well.
Your data stays yours. Files live in your own SharePoint and OneDrive tenant. There is no proprietary cloud and no lock-in, with ISO 27001, SOC 2 and GDPR controls behind it. Your firm owns the data and the access, not a software vendor.
It is one workspace, not five tools. Documents, email filing, e-signing, templates and client portals all sit in a single place your team already knows how to use, instead of being stitched together across separate apps.
The filing runs itself. Auto-filing and templated folder creation structure every client the same way, so nothing lands in the wrong drawer. E-signatures are unlimited and included, with no per-envelope fees and no third party account to babysit. And SuiteFiles Connect gives clients a branded, secure space to upload, download and sign, with nothing for them to install.
The pricing is flat. Users are included in the base and storage is uncapped, so your costs stay predictable as you grow instead of creeping up per seat and per gigabyte.
You keep your tax software. You replace the filing cabinet.
This is the fear worth naming directly, because it stops a lot of firms from moving: leaving FileCabinet CS does not mean leaving UltraTax CS or Lacerte.
Your tax workflow does not change at all. You prepare and file returns exactly as you do today. SuiteFiles simply becomes the home for the documents, so the outputs land in structured client folders inside your own Microsoft 365 tenant. Templated folders keep every engagement organised the same way, you can file emails and attachments straight from Outlook into the right client, and full-text search runs across documents and email from any device.
In short, the tax software you trust stays. The drawer it used to live in gets a serious upgrade.
Moving is easier than staying
FileCabinet CS makes leaving hard on purpose. The whole point of a guided migration is to take that work off your team, so the lack of a bulk export becomes our problem rather than yours.
It works in three steps. First, we mirror your structure, recreating your client folder layout in SuiteFiles so nothing feels foreign on day one. Then we do the heavy lifting, managing the export and import with you rather than handing it to a seasonal hire. Finally, your team gets live training and tailored onboarding, and most firms are up and running in one to three weeks with zero downtime.
For context, firms using SuiteFiles hand back 235+ hours a year to client work through auto-filing and workflow automation. That is the difference between a system you fight and a system that quietly does the filing for you.
See it on your own folders before your next busy season
The sunset is coming whether you plan for it or not. The firms that move calmly are the ones that start early, well outside busy season, with the migration managed for them.
If you want to see what that looks like, book a short, tailored walkthrough. Bring your folder structure and we will show you exactly how the move plays out on your own files, with your tax software still in place and your data still yours.
When the cabinet closes, land somewhere better.
