Which tax rates do these calculators use?
The calculators use 2026 tax rates. We update them when substantively enacted legislation or CRA guidance changes the calculation.
Calculators
Canadian tax calculators
Estimate tax, find deadlines, and plan contributions. Each tool states its rates, assumptions, and limits.
Tools
Choose a calculator and get a clear estimate.
Use current rates and clear assumptions to prepare for a planning discussion. Confirm the result before you file or make a transaction.
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Productivity Mega Deduction Calculator
Estimate immediate expensing, the first-year deduction, and the incremental corporate tax effect under the September 15, 2026 proposal.
- PMD eligibility
- Existing CCA comparison
- Corporate tax impact
- Policy-version disclosure
Corporate Tax Calculator
Estimate federal and provincial corporate tax for CCPCs and other corporations. Uses 2026 tax rates.
- CCPC & General Corp rates
- Small Business Deduction
- Investment income tax
- All provinces & territories
Corporate Tax Rates
Compare 2026 federal and provincial corporate tax rates, CCPC rules, and small business deduction limits.
- 2026 rate tables
- Provincial comparisons
- CCPC vs General Corp
- Investment income rates
Withholding Tax Calculator
Estimate Canadian withholding tax on payments to non-residents. Select the country and payment type to apply available treaty rates.
- Tax treaty rates
- Multiple payment types
- Country-specific rules
- Real-time calculations
Tax Deadlines Tool
Find corporate tax, GST/HST, payroll, and other business tax deadlines. Export the dates to your calendar.
- Corporate tax deadlines
- GST/HST filing dates
- Payroll remittances
- Calendar export
CPP/EI Calculator
Estimate CPP and EI contributions, annual maximums, and stop dates from salary and pay frequency.
- 2025 & 2026 contribution limits
- Multiple pay frequencies
- Stop date calculations
- Detailed breakdowns
Shareholder Loan Checker
Check loans between a Canadian corporation and its shareholders for subsection 15(2) exposure. See repayment deadlines, possible income inclusions, interest benefits, and non-resident withholding.
- 15(2) repayment deadlines
- Income inclusion estimate
- 80.4 interest benefit
- Non-resident Part XIII exposure
EIFEL Calculator
Estimate the Excessive Interest and Financing Expenses Limitation under section 18.2 of the Income Tax Act. Compare deductible and restricted interest and financing expenses.
- ATI computation
- 30% fixed ratio
- Capacity transfers
- Restricted IFE carry-forward
Free deadline calendar
Get the 2026 Canadian tax deadline calendar
Get corporate tax, GST/HST, payroll remittance, and slip deadlines by email. We will also send a short reminder before key dates. Unsubscribe at any time.
Next step
Move from one calculation to a live tax workspace.
TaxDesk helps Canadian businesses and their advisors keep the entities, deadlines, documents, important tax details, and review work behind these calculations in one ongoing record.
Built for Canadian compliance work
Set up entities
Add corporations, trusts, partnerships, and owners in one workspace.
Track obligations
Turn estimates into filing, payment, payroll, and GST/HST deadlines.
Keep records ready
Store tax documents with the entity, period, and workflow they belong to.
Questions before you calculate
Know what the result includes before you use it.
Do the calculators cover every province and territory?
The applicable calculators include rates for all 10 provinces and 3 territories. Select a jurisdiction to apply its rates.
Can I use the results for tax planning?
Use the results as planning estimates. Confirm your facts, tax treatment, and filing requirements with a qualified tax professional.
Are the results guaranteed?
No. The calculators use the stated rates and assumptions, but they cannot cover every tax situation. Verify the result before you file or make a transaction.
Does TaxDesk store my calculation data?
No. The calculations run in your browser. We do not store or transmit the financial information that you enter.