Tallyfern Rates (Canada)

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

Read-only Canadian GST/HST rates, small-supplier check and CRA allowance rates, with CRA sources.

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Copy this into your MCP client config:

{
  "mcpServers": {
    "Tallyfern Rates (Canada)": {
      "url": "https://mcp.tallyfern.com/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (5)

• gst_hst_small_supplier_check read-only

  Apply the CRA's $30,000 small-supplier tests (single calendar quarter and four consecutive calendar quarters) to taxable revenue by calendar quarter. Says whether the person must register for the GST/HST, when they stop being a small supplier, the effective date of registration, and headroom for next quarter. Most businesses only (not charities/public service bodies). Returns structuredContent with status, headline, the triggering quarter (or null), per-quarter rolling totals, next-quarter headroom, sources and an as-of date.

  Parameters:

  • quarters (required) — array — Consecutive calendar quarters, no gaps (use 0 for quarters with no sales).
  • taxiOrRideshare — boolean — True if self-employed taxi or commercial ride-sharing driver (must register regardless).

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• gst_hst_rate_by_province read-only

  Current GST/HST rate for a Canadian province or territory (or all 13), with the PST/QST rate CRA lists for reference. From CRA's 'Charge and collect the GST/HST' table. Returns structuredContent with one rate row (or all 13), the effective-from date, notes, the canada.ca source and an as-of date.

  Parameters:

  • province — string — Province or territory code or name, e.g. "ON", "Ontario", "QC", "Yukon".

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• cra_automobile_allowance_rate read-only

  CRA reasonable per-kilometre allowance rates for employer-paid vehicle allowances (2026 default; 2025 also available): first 5,000 km and after, provinces vs territories. Optionally calculates the allowance for a number of business kilometres. Returns structuredContent with the per-km rates for provinces and territories, the rates for the given region, an optional tiered calculation, the source and an as-of date.

  Parameters:

  • year — number — Calendar year (2026 or 2025). Default 2026.
  • province — string — Province or territory code or name, e.g. "ON", "Ontario", "QC", "Yukon".
  • kilometres — number — Business kilometres in the calendar year, to calculate an allowance.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• cra_meal_travel_allowance read-only

  CRA simplified-method rates (latest published tax year): flat meal rate per meal and maximum per day, and vehicle cents/km by province or territory where travel begins. These apply to moving expenses, northern residents deductions and medical travel, not to employer per-diems. Optionally calculates amounts. Returns structuredContent with the tax year, meal rates, vehicle cents/km (one province or all), optional vehicle and meal amounts, scope notes, the source and an as-of date.

  Parameters:

  • days — integer — Number of days (caps meals at the daily maximum).
  • meals — integer — Number of meals.
  • province — string — Province or territory where the travel begins.
  • kilometres — number — Kilometres driven, to calculate a vehicle amount (needs province).

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• ontario_hst_basics read-only

  Plain-language basics for Ontario businesses: the 13% HST rate, the $30,000 small-supplier threshold, the 29-day registration deadline and place-of-supply rule, with CRA sources. Returns structuredContent with the Ontario rate row, the threshold, the registration deadline in days, sources and an as-of date.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

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