Editorial Policy

Scope

CATaxTools publishes educational tax calculators, provincial tax references, and explanatory articles for Canadian taxpayers. Content is written for general informational use and does not replace individualized tax advice.

Source hierarchy

We cite official sources only, in this order of authority:

• Canada Revenue Agency (CRA) publications, forms, guides, folios, and tax-tip updates.
• Department of Finance Canada budgets and legislative announcements (federal Budget day).
• Official provincial and territorial finance ministries and revenue authorities, including Revenu Québec for Quebec-specific rules (QST, the provincial abatement, and TP-1 filing).
• Statistics Canada indexation figures (CPI-based annual adjustment) and enacted legislation, such as the Income Tax Act, when thresholds or rules change.

Review cadence

Reviews follow the Canadian tax calendar rather than an arbitrary schedule:

• Calendar tax year — Canadian personal tax runs on the calendar year (not a split fiscal year), so our federal, provincial, CPP/EI, RRSP, and TFSA figures roll to the new year every 1 January.
• Annual CRA indexation (published ~November) — CRA typically confirms the following year's indexed federal brackets, Basic Personal Amount, CPP/EI maximums, and contribution limits (RRSP, TFSA) in the fall; we apply them once published, ahead of the calendar-year rollover.
• Quarterly — the CRA prescribed interest rate (used for late-filing penalties and quarterly instalment interest) is re-checked every quarter against CRA's published prescribed-rates table.
• Federal and provincial Budget day — announced changes to brackets, credits, or benefit programs are applied once confirmed, whether from the federal Budget or a provincial/territorial budget.
• Event-driven — legislative changes that take effect outside the normal calendar (for example a mid-year CRA prescribed-rate change, or a capital gains inclusion-rate announcement) are applied when they take effect, not at the next scheduled pass.

In July 2026 we additionally completed a full-site accuracy review: roughly 200 calculator, reference, and article surfaces were re-checked against primary CRA and provincial sources.

Calculator maintenance

• Tax rates, thresholds, and formulas are encoded once in central, year-keyed data files, so a single verified update flows through every calculator and page that uses the figure.
• Calculation logic is covered by an automated test suite (currently 1,600+ tests across the calculation layer), including anchor tests pinned to published CRA figures — such as RRIF minimum withdrawal factors under Income Tax Regulation 7308 — that fail loudly if a rate changes unexpectedly. The full suite runs before any change is published.
• Every build also verifies internal links sitewide before deploying.
• Time-sensitive pages display the tax year they cover and a "Last updated" date generated from the page's actual revision history, falling back to the build date where no history is available.
• Major assumptions, including Quebec's separate T1/TP-1 filing and federal abatement, are summarized on the page and linked to source material where practical.

See the methodology page for how calculations are structured, the current site totals, and how ambiguous rules are handled.

Content updates and corrections

We revise pages when official tax brackets, contribution limits, benefit amounts, deadlines, or CRA administrative guidance change. If a factual issue is reported, we review the underlying source and update the page when needed.

We do not maintain a public corrections log or a dedicated contact address. Instead, each time-sensitive page displays its own "Last updated" date, generated from the page's actual revision history (falling back to the build date where no history is available), so you can see when it was last checked against source material.

Editorial independence

Rankings, calculator outputs, and article conclusions are based on our reading of official materials and published assumptions, not sponsored placements or advertiser input.