Marginal Tax Rate 2025 Ontario Tax. Tax rates are continuously changing. Welcome to the 2025 income tax calculator for ontario which allows you to calculate income tax due, the effective tax rate and the marginal tax rate based on your taxable.
Now, if you had a 50% marginal tax rate in ontario, you’d pay $299 in taxes on the dividends received from those shares. The ontario tax brackets and personal tax credit amounts are increased for 2025 by an indexation factor of 1.045 (4.5% increase), except for the $150,000 and $220,000 bracket amounts, which are not.