Sources
Where the numbers come from
Each group identifies the source year, source type, and why TaxHours uses it. Some source years differ, so the app labels those differences rather than treating all public datasets as interchangeable.
Public figures can be transformed or normalized for readability. Those cases are labelled as transformed, hybrid, residual, program-focused, or functional data where applicable.
Download the constants packageTax
Federal and provincial or territorial personal-income-tax parameters used by the 2026 educational estimate.
- Federal and provincial or territorial income tax2026 tax yearTax formulaCRA – Tax rates and income brackets (2026)
The model applies the documented simplified credits and province-specific treatment described in the methodology.
- Ontario income-tax add-ons2026 tax yearTax formulaOntario personal income tax and Ontario Health Premium guidance
Ontario Health Premium and Ontario surtax are treated as provincial income-tax add-ons where applicable.
Payroll
Employee CPP, CPP2, EI, QPP, QPP2, and QPIP parameters are kept separate from income-tax spending allocations.
- Employee payroll contributions and premiums2026 tax yearPayroll formulaCRA Payroll Deductions Formulas and payroll contribution guidance
Used only for employee-side CPP/CPP2 or QPP/QPP2, EI, and QPIP estimates.
Federal expenditure
Federal categories are a program-focused view used to show proportional estimates against federal income tax.
- Federal spending categories2024-25Program-focused federal viewAnnual Financial Report of the Government of Canada 2024-25
Categories may not match official top-level accounting categories exactly; the source taxonomy is displayed with the spending view.
Provincial and territorial expenditure
The app uses the source taxonomy available for each province or territory rather than presenting every government as equally comparable.
- Provincial public accounts and budget actuals2024-25 where availableOfficial or hybrid actualsProvincial government public accounts and budget sources
Ontario, British Columbia, and Alberta retain their documented source badges and comparability notes in the spending view.
- Statistics Canada functional spending data2024StatsCan functional dataStatistics Canada Table 10-10-0005-01
Used for provinces and territories whose displayed categories come from Statistics Canada functional classifications.
Policy costing
The Policy Impact Simulator is a static, assumption-based education model. It is not an official government revenue forecast.
- Policy costs and evidence records2026 model releaseModel inputsTaxHours policy costing and source manifest
Each policy card exposes its own source and limitations. The model holds behavioural responses and income distribution constant.
Population
Population values support per-capita federal-transfer and fiscal comparisons; they are not personal invoices.
- Canada and provincial population estimatesJuly 1, 2024Population tableStatistics Canada Table 17-10-0009-01, Population estimates, quarterly, July 1 2024
The source date is shown alongside fiscal measures when the timing differs.
Fiscal funding and debt
Funding and debt concepts are shown separately from the calculator’s personal income-tax estimate.
- Federal fiscal funding and debt2024-25Official actualsAnnual Financial Report of the Government of Canada 2024-25
Includes current revenue, expenditure, public debt charges, and published debt measures where used.
- Provincial, territorial, and local government finance2024StatsCan functional dataStatistics Canada Table 10-10-0147-01
These are consolidated provincial, territorial, and local government finance statistics, not narrow ministry-only budgets.