Taxation: Marginal Rates, Credits, and Capital Gains
The framework
Canadian personal taxation on the exam turns on the difference between deductions (subtracted from income) and credits (subtracted from tax). Know the ordering of the return: total income, deductions, net income, taxable income, and then the non-refundable credits applied at the lowest marginal rate. Federal credits include the basic personal amount, age amount, pension income amount, and the Canada employment amount; provincial credits follow similar logic.
Investment income
Distinguish interest (fully taxable), eligible and non-eligible dividends (grossed up and offset by the dividend tax credit), and capital gains (50% inclusion). Understand capital losses and their restriction: allowable capital losses offset taxable capital gains, and a net capital loss can be carried back three years and forward indefinitely, but not against other income. Know the principal residence exemption and the requirement to report a sale of a principal residence.
Marginal versus average rates
Candidates must be able to distinguish the marginal rate (tax on the next dollar) from the average rate (total tax divided by total income). Many questions test whether a deduction or a credit is worth more to a high-income client, and the answer depends on the marginal rate for a deduction but not for a refundable credit.
Traps
Watch for questions that apply a credit at the marginal rate, ignore the gross-up on dividends, or allow a capital loss to reduce employment income. Also watch for the trap of assuming all RRSP withdrawals are taxed at the same rate as contributions were deducted.
Rule of thumb
A $1,000 deduction saves the marginal rate multiplied by $1,000; a $1,000 non-refundable credit at 15% saves $150 regardless of bracket.