Taxable income

Where taxable income sits on the return

Your return builds up in steps. You report your income, subtract the deductions that apply to produce net income on line 23600, then subtract a further group of deductions, lines 24400 to 25600, and report the result on line 26000. The CRA describes line 26000 as the amount used to calculate your federal tax and your provincial tax on Form 428.

The later group includes items such as loss carry-overs from other years and the capital gains deduction. That is why two people with the same net income can end up with different taxable income. Ontario residents calculate Ontario tax from the same figure, so there is no separate Ontario taxable income to work out.

Why it is not the same as what you earned

Gross pay, total income, net income and taxable income are four different figures. Deductions come off between total income, net income and taxable income, so taxable income is usually lower than the income you started with. The number on a pay stub is rarely the number the tax brackets are applied to.

Taxable income is also not the tax you pay. It is the base. Each portion is taxed at the rate for its bracket, and for 2026 the federal rate on the first $58,523 is 14%, rising in steps from there. Credits are applied after the tax is calculated, so they do not reduce taxable income.

An illustrative example

Suppose someone reports $80,000 of income in a year, has $10,000 of deductions that reduce income to a net income of $70,000, and has no loss carry-overs or other later deductions. Their taxable income is $70,000. The first $58,523 is taxed at 14% federally and the remaining portion at the next federal rate. Ontario rates are applied to the same $70,000. The figures are illustrative only and leave out credits, surtax and other items.

Common mistakes

A frequent mistake is treating a refund as proof that taxable income was low, or assuming a deduction and a credit work the same way. Another is looking only at net income when a loss carry-forward or capital gains deduction would have reduced the base further.

What to discuss with your accountant

Bring your notice of assessment, slips and receipts for deductions. Ask which later deductions you may have available, whether any losses should be carried to other years, and how your taxable income compares with the brackets in the 2026 tax guide.