Workiro Is Trusted By 65,000 Professionals

See Why Firms Run TaxCalc, Workiro
and Engager Over Karbon

Every client entered once, in TaxCalc –
not copied across two platforms that each keep their own version of the truth.

Workiro and Engager syncs two-way with TaxCalc, so documents, signatures, jobs and time all work from one client record.

Karbon is a credible, well-built platform. The fork is what happens to your client record when it's spread across multiple apps.

Book a Workiro demo

Pick Karbon If...

• You're open to one platform absorbing practice management, documents and workflow over time.

• A large global vendor matters more to you than UK-based support and a named account manager.

Pick TaxCalc, Engager & Workiro If...

• You run TaxCalc - or you're moving to it - and want the client set up once, and synced everywhere else.

• You want best of breed tools that seamlessly integrate into your stack

• You want every signature filed against the client instantly, and your data migrated for you.

Book a demo

Compared across real jobs:

The job	TaxCalc + + Engager	Karbon
Connect your tax software — without exporting and re-keying	TaxCalc + Workiro + Engager Two-way TaxCalc syncBuilt into Workiro and Engager — client data flows both ways.	Karbon No built-in tax computation or filing engine — Karbon's tax tooling is workflow templates and AI-generated organizers around the work, not the return itself
Enter a client once, use the record everywhere	TaxCalc + Workiro + Engager TaxCalc is the source of truthDocuments, signatures, jobs and time all read from one record.	Karbon Karbon holds its own client and contact records — tax computations and filings live in a separate product
Get fully migrated — data, documents and emails moved for you	TaxCalc + Workiro + Engager Free assisted migrationFor eligible firms — under 21 days, old system stays live throughout.	Karbon Onboarding ranges from free group setup to paid, dedicated-expert-led implementation packages
Speak to UK-based support that knows UK practice	TaxCalc + Workiro + Engager UK-based support98.4% satisfaction across 120,367 tickets.	Karbon Karbon is headquartered in San Francisco, California
Get trained without a surcharge	TaxCalc + Workiro + Engager Included with onboarding	Karbon Team training is a paid add-on on the Team and Business plans; included only on Enterprise
Have a dedicated account manager who knows your firm	TaxCalc + Workiro + Engager Named, UK-based account manager	Karbon A dedicated Customer Success Manager is a paid add-on on Business, and included only on Enterprise — not available on Team at all
Work alongside Microsoft 365 and SharePoint	TaxCalc + Workiro + Engager Microsoft 365 integrationDocuments brought across from SharePoint during migration.	Karbon Connects to OneDrive/SharePoint as a linked storage option — files stay in Microsoft's system rather than migrating into Karbon
Get documents e-signed without a separate paid tool	TaxCalc + Workiro + Engager Built into Workiro and EngagerSigned documents file against the client automatically.	Karbon Native eSignatures — but sold separately in credit bundles (from $100 per 100 signatures) on top of the subscription
Let clients review and sign with no login, on any plan	TaxCalc + Workiro + Engager Yes, all plansClients open a secure link — no account, no password.	Karbon Review and document sharing: also no-login, via a magic link — included on Team & Business Signing specifically: needs a separately purchased eSignature credit (see above)
Run jobs on a visual board, with time recording	TaxCalc + Workiro + Engager Engager job boardJob phases, task management and time tracking; Workiro adds document workflows and bottleneck visibility.	Karbon Yes — Karbon's job and workflow management is genuinely strong; this is its home turf

All Karbon claims below are public information, verified directly against karbonhq.com, 20 Jul 2026. Karbon updates its site and pricing frequently — re-verify before this page goes live.
Karbon's own tax solution page frames its tax capability as workflow templates, tax queues and AI-generated client organizers (via its StanfordTax integration) — not return computation or filing. Source: karbonhq.com/solution/tax, 20 Jul 2026.
Karbon's pricing FAQ states implementation support "range[s] from free group onboarding to guided implementation packages led by a dedicated expert." Third-party reporting (G2 review, Karbon Pricing guides) cites paid implementation running from roughly $1,000 up to $9,999+ depending on firm size. Sources: karbonhq.com/pricing; g2.com/products/karbon/pricing, 20 Jul 2026.
Karbon is headquartered at 548 Market Street, San Francisco, California. Sources: PitchBook and CB Insights company profiles, 20 Jul 2026.
Karbon's pricing/feature comparison lists "Team Training" and "Advanced Team Training" as a Paid add-on on the Team and Business plans, included only on Enterprise. Source: karbonhq.com/pricing (Education section), 20 Jul 2026.
Karbon's pricing/feature comparison lists "Dedicated Customer Success Manager" as unavailable on Team, a Paid add-on on Business, and included only on Enterprise. Source: karbonhq.com/pricing (Support section), 20 Jul 2026.
Karbon's OneDrive/SharePoint integration is a "Connected Folder" link: files are linked and kept in sync but remain stored in the firm's Microsoft 365 tenancy, not migrated into Karbon's own document store. Source: karbonhq.com/integrations/onedrive, 20 Jul 2026.
Karbon's eSignatures are native (not a third-party tool) but billed separately: credits are sold in bundles from $100 for 100 credits, decreasing per-credit at volume, and expire 12 months after purchase. Source: karbonhq.com/feature/e-signatures and karbonhq.com/pricing#eSignatures, 20 Jul 2026.
Karbon for Clients grants access via a single-use "magic link" (no username/password), included in the price of both the Team and Business plans; the firm can optionally require 2FA. Signing specifically draws on the separately purchased eSignature credits above. Source: karbonhq.com/feature/client-portal, 20 Jul 2026.

Workflow diagram showing new client onboarding with auto-import from systems like TaxCalc, IRIS, Xero, and Kloud Connect, message exchange for engagement letter review and signing, followed by read receipts and built-in signing, concluding with AI-assisted faster document signing and filing against the client.

Without Workiro:

Two client lists: a practice-management platform and a document platform, with no listed sync between them.

Two roadmaps in collision: FYI's top plan offers FYI as your practice-management source; Karbon publishes its own case for replacing FYI.

With Workiro:

One record: the client lives in TaxCalc; Workiro and Engager sync two-way.

Signatures file themselves: the moment a client signs, the document is on their record.

Tools that stay in their lane: three products built to complement each other, not absorb each other.

Book a TaxCalc, Engager & Workiro demo

“Before, if something wasn’t finished, it just sat in my head. Now I can see everything - what’s been sent, what’s signed, and what’s outstanding. That peace of mind is huge.”

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A 98.4% Support Rating Over Last 120,367 Tickets

Free migration for eligible firms – book a demo for qualification

Frequently Asked Questions:

Karbon's demo looked brilliant. Why not consolidate everything onto one platform?

Because consolidation is a bet on one vendor's roadmap. Karbon is a genuinely strong platform - but its tax and document ecosystem is built around US software. A UK practice does each job with a specialist instead: TaxCalc for compliance, Engager for practice management, Workiro for documents and signing. They connect, and the choice of tools stays yours.

Does the stack connect to everything Karbon does?

Across the UK stack, yes - and it goes further where it counts. TaxCalc is the compliance engine 12,000+ UK firms already run, Engager handles practice management, and Workiro adds document management and no-login signing on top. The difference is the UK backbone: TaxCalc and Engager don't appear on Karbon's integrations page, which is built around Xero, QuickBooks and Intuit ProConnect.

Do clients need to sign in to review and approve documents?

Not with Workiro. Where Karbon asks clients into a portal to approve and sign, Workiro sends a branded secure link - no account, no password. Clients review and sign from any device, and the signed document files itself against the client the moment it's done.

We've got fifteen years of documents in our current system. Can they come with us?

Yes - that's the migration, not an add-on. Lloydbottoms brought fifteen years of documents into the cloud with Workiro, and their clients now sign without a single login. Legacy servers, SharePoint libraries and old document systems are all part of the assisted move, free for eligible firms.

Can we switch mid-tax-season?

Yes. Migration is assisted and your old system stays live throughout, so there's no cliff-edge.

See Why Firms Run TaxCalc, Workiro
and Engager Over Karbon

Every client entered once, in TaxCalc –
not copied across two platforms that each keep their own version of the truth.

Pick Karbon If...

Pick TaxCalc, Engager & Workiro If...

Compared across real jobs:

Set a Client Up Once - Never Type Them Twice

Five Questions to Ask On Every Demo:

Frequently Asked Questions:

Keep Every Client File Defensible — Without Slowing Down.

See Why Firms Run TaxCalc, Workiroand Engager Over Karbon

Every client entered once, in TaxCalc –not copied across two platforms that each keep their own version of the truth.

Pick Karbon If...

Pick TaxCalc, Engager & Workiro If...

Compared across real jobs:

Set a Client Up Once - Never Type Them Twice

Five Questions to Ask On Every Demo:

Frequently Asked Questions:

Keep Every Client File Defensible — Without Slowing Down.

See Why Firms Run TaxCalc, Workiro
and Engager Over Karbon

Every client entered once, in TaxCalc –
not copied across two platforms that each keep their own version of the truth.