SuiteFiles vs FileCabinet CS: What Accounting Firms Should Know

What Accounting Firms Should Know

For years, FileCabinet CS has been the default place accounting firms filed client documents — mostly because it came bundled with the Thomson Reuters CS Professional Suite, not because anyone chose it on its own merits. That default is about to disappear. Here’s how the two systems actually compare, and what the FileCabinet CS sunset means for firms still running on it.

What FileCabinet CS was built for

FileCabinet CS does one job: store client files next to the rest of the CS Professional Suite. If your firm runs UltraTax CS or Lacerte and never touches a hybrid or remote setup, that tight coupling has real value — documents sit close to the tax software your team already lives in.

But that’s also the ceiling. FileCabinet CS was designed for a desktop-first, in-office world. Firms report lag when printing or loading documents even on solid hardware, and storage caps out at 100GB — a limit growing firms hit within a few years, at which point staff start managing storage instead of serving clients. It’s a filing cabinet, not a workspace: no client portal to speak of, no built-in e-signing, no way to bring documents, email, and approvals into one place.

What SuiteFiles is built for

SuiteFiles is an intelligent workspace built on the Microsoft 365 your firm already pays for. Instead of adding another closed system, it brings document management, email filing, templated document creation, unlimited e-signatures, and a branded client portal into one place your team already knows how to use.

A few differences that matter day to day:

Your data stays yours. Files live in your own SharePoint and OneDrive tenant, not a proprietary vendor cloud. If you ever turned SuiteFiles off, your files and folders would still be sitting in your own Microsoft 365 environment. That’s backed by ISO 27001, SOC 2, and GDPR controls — your firm owns the data and the access, not the software.

Filing runs itself. Auto-filing and templated folder structures mean every client gets set up the same way, so nothing lands in the wrong drawer. Signed documents file themselves back where they were sent from — no downloading, no re-filing.

It’s one system, not a patchwork. Documents, client collaboration, e-signing, and PDF tools sit together, instead of being stitched across FileCabinet CS, a separate signing tool, and email.

Pricing is flat and published. Users are included in the base, storage is uncapped, and there are no per-signature or per-envelope charges — so costs stay predictable as the firm grows.

Importantly, moving to SuiteFiles doesn’t mean touching your tax workflow. Firms keep UltraTax CS, Lacerte, or whatever they already prepare returns in — SuiteFiles simply becomes the home for the documents those workflows produce.

Side by side

	FileCabinet CS	SuiteFiles
Support & updates	Ending December 31, 2027	Actively developed
Where files live	Proprietary Thomson Reuters storage	Your own Microsoft 365 (SharePoint/OneDrive) tenant
Storage	Capped at 100GB	Uncapped
Client portal	None	Branded portal included (SuiteFiles Connect)
E-signatures	Not built in	Unlimited, included
Email filing	Not built in	Built in, straight from Outlook
Environment	Desktop-first, in-office	Cloud-native, built for hybrid/remote
Migrating out	No bulk export — client by client, by hand	Guided migration, structure mirrored for you
Pricing	Bundled with CS Professional Suite	Flat, published, per-user with uncapped storage
Works alongside your tax software	N/A (native to CS Suite)	Yes — UltraTax CS, Lacerte, etc. unaffected

Why the timing matters

Thomson Reuters is closing FileCabinet CS on December 31, 2027. After that date, there are no more updates, no more support, and continued access to files isn’t guaranteed.

That date feels distant, but the practical runway is shorter than it looks. No firm wants to migrate a document system mid–tax season, which really only leaves two sensible windows: sometime in 2026, or the middle of 2027. FileCabinet CS also has no bulk export — migration happens client by client, by hand — so the longer a firm waits, the more manual work lands on a smaller window of time.

Thomson Reuters’ suggested next step, Onvio, is still a full migration, and firms report a clunky client portal and thin workflow once they’re there. If a firm has to move regardless, it’s worth spending that effort landing somewhere that’s a genuine step up rather than a sideways move to another closed system with its own limits.

Making the switch

Firms that move to SuiteFiles typically get a guided migration: their existing folder structure is mirrored, the export and import is handled for them rather than left to a bulk-export process that doesn’t exist, and the team gets live training as part of onboarding. Most firms are up and running in one to three weeks with no downtime — and no scramble as the FileCabinet CS deadline approaches.