SpidNums vs TaxDome: an honest comparison for Canadian firms

What TaxDome does well

This section comes first deliberately. TaxDome is a serious product with real customers, and a comparison that pretends otherwise is not worth reading.

• A genuinely strong client portal with a mobile app, which drives higher client adoption than most practice-management tools achieve.
• Mature document management, e-signatures and organizers built for tax and bookkeeping workflows.
• Aggressive value pricing for solo practitioners relative to per-seat competitors.
• An explicit Canadian presence, including Canada-specific pages and Canadian customers.

Where the fit differs

These are differences in model rather than claims about missing features. Where a capability is not listed for TaxDome, that means we did not verify it — not that it is absent.

• Pricing model: TaxDome is priced per user per year, billed annually. SpidNums is a flat fee per firm, so cost does not scale with headcount.
• White-label tiering: TaxDome's white-label portal is a top-tier feature. SpidNums ships full white-label branding on every plan, including emails and letterhead.
• Deadline logic: SpidNums generates deadlines from Canadian rules — the T2 six-month clock plus the earlier balance-due date, GST/HST by assigned reporting period, fiscal-year-end reminders — rather than from generic recurring tasks.
• Data residency: SpidNums hosts client data in Canada (ca-central-1). We make no claim about where any competitor hosts data.

Pricing

As of July 2026, TaxDome publishes tiered pricing of roughly USD $800, $1,000 and $1,200 per user per year (Essentials, Pro and Business), billed annually, with the white-label portal on the Business tier.

SpidNums is a flat USD $1,200 per firm per year with every feature included, so the comparison turns on headcount: per-seat pricing is usually cheaper for one person and usually more expensive from the third or fourth seat. Source: TaxDome pricing, checked 2026-07-22.

What SpidNums is, plainly

SpidNums is practice management for Canadian accounting firms: the client list, the services each client buys, the deadlines those services generate, the person who owns each one, and the engagement letter that defined the scope. It is not a general ledger, it does not prepare or transmit returns, and it does not calculate payroll — those stay in the tools your firm already files with.

The list below is the complete set of claims this site makes about the product. If a capability is not on it, we do not claim it.

• Multi-tenant white-label branding per firm — name, logo, colours, emails and letterhead
• Colour-coded SLA deadline dashboard ranked by proximity
• Aggregated reminders across tasks, service cadences and fiscal year-ends
• E-signed engagement letters with a public, no-login client portal
• Per-tenant Google Workspace integration
• Client portal
• Staff roles with confidential-client gating
• Canadian-hosted data (Supabase ca-central-1)
• Flat USD $1,200 per firm per year, all inclusive
• CSV/XLSX client import and export

Questions worth asking both vendors

Comparison grids converge because feature names converge. These six questions separate products that look identical on paper, and they are worth asking of TaxDome and of SpidNums alike.

• How is a deadline generated — from a rule tied to the client's fiscal year-end and reporting period, or from a recurring task somebody configured by hand?
• When a client's filing cadence changes, is that one field or a rewrite of every future date?
• Whose brand does the client see on emails, on the portal and on a signed engagement letter — and on which plan does that become true?
• Where is client data hosted, and is tenant isolation enforced in the database or only in the application? Get the answer in writing.
• What is the total annual cost at three seats and at ten? Ask for the total, not the per-user figure.
• What comes across on migration, and what does not? Clients usually move; documents, notes and completed work usually do not.

Who should choose TaxDome

A firm whose main problem is client document collection should look hard at TaxDome. Its portal and mobile app are better at getting ordinary small-business clients to actually upload things than most alternatives, and if that is your bottleneck, portal adoption beats deadline logic.

If that describes your firm, take the other product seriously. If it does not, the practice management overview covers what SpidNums does in full.

Switching

SpidNums imports clients from CSV or XLSX, which is the practical migration path from any system that can export a client list. There is no direct connector, and document histories, portal threads and completed e-signature records do not migrate — plan to leave those in place for the retention period.

SpidNums imports and exports clients as CSV or XLSX. There is no direct migration connector, so historical documents, notes and completed work do not come across automatically — plan the cutover around a period boundary rather than mid-season.