CPA Tax Calculators · Ontario 2026
Free Canadian Tax Tools
Six free calculators built by Bader A. Chowdry, CPA, CA, LPA. Results appear instantly — email only required if you want the enhanced 1-page PDF report emailed to you.
GST / HST
HST Calculator Ontario
Net HST owed + CRA-required filing frequency + next deadline.
Structure
Sole Prop vs Incorporation
Compare 2026 combined tax and after-tax retention under each structure.
Rollover T2057
Section 85 Eligibility
Eight-question checker with s.85(1) rule references and T2057 warnings.
CCPC s.125(5.1)
Passive Income Trap
SBD grind + extra tax on AAII over $50K with restructuring paths.
SBD s.125
Small Business Deduction
Effective SBD after taxable-capital and passive-income grinds.
T2125 / T2200
Home Office Deduction
Annual deductible for self-employed or employees with T2200.
Free Consultation
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