Interest income in Canada is taxed as ordinary income: every dollar your savings earn in a taxable account is added to your income for the year and taxed at your marginal rate, exactly like wages. Of the ways money makes money, interest gets the least sympathy from the tax system — Canadian dividends come with a tax credit and only a portion of a capital gain is taxable, while interest is included in full, with no discount of any kind.
None of that is a reason to avoid interest. It is a reason to know what the tax system sees when it looks at your savings, starting with which rate applies.
Your marginal rate does the work
“Fully taxable” sometimes gets pictured as a flat tax on interest. The truth is simpler and slightly worse: interest stacks on top of everything else you earned, so it is taxed in your highest bracket (the rate that applies to your last dollar of income rather than your average rate across the year). Keeping the numbers round: suppose your top bracket takes 30 cents of a marginal dollar. You keep $70 of every $100 in interest. In a 45-cent bracket, the same $100 leaves you $55.
Banks and credit unions pay interest gross. Nothing is withheld for Canadian residents; the bill arrives when you file. The treatment is identical whether the interest comes from a GIC, a high-interest savings account, a term deposit, or the small change a chequing account pays with visible reluctance. (If the GIC side of that list needs a refresher, our plain-language GIC guide covers the product itself.)
The T5 slip, and what it doesn’t catch
Institutions tell the CRA what they paid you. When a payer credits you $50 or more of interest in a year, it must issue a T5 slip, with a copy filed to the CRA (a T5 is required when interest paid in the year is $50 or more). Two things follow. First, below that threshold no slip arrives, but the interest is still reportable; an absence of paperwork is not an exemption. Second, because the CRA matches slips against filed returns, forgotten T5 interest is among the easier omissions for it to spot.
One line covers joint accounts: interest earned in a joint account is reported in proportion to how much each holder contributed to it, rather than being split 50/50 by default.
Compound GICs: taxed before you’re paid
The timing is the classic surprise. A compound GIC reinvests its interest and pays everything at maturity, but the tax does not wait for the payout: accrued interest must be reported every year, whether or not any cash has moved (for investments acquired after 1989, accrued interest must be reported annually to each anniversary date). Your issuer sends a T5 for interest you have not yet received, and the CRA expects it on that year’s return.
Take $10,000 into a five-year compound GIC at 4 per cent — a rate picked for easy arithmetic. Roughly $400 of interest accrues in year one, and tax on that $400 is due with that year’s return even though the bank has not paid out a cent. The same happens every year after, on a slightly larger amount each time as interest starts earning interest. The consolation is that each slice is taxed only once: when the GIC finally pays out in year five, the accumulated interest is not taxed again. You’ve been settling up as you went.
Annual-pay GICs sidestep the cash-flow pinch by paying interest out each year, so money actually arrives alongside the tax bill. That is a cash-flow difference, not a tax difference; the CRA collects the same amounts either way. A savings account has no such wrinkle: it is simply taxed on the interest actually credited during the year, at the same marginal rate as everything else.
Registered accounts are the off switch
This is why the registered lanes exist. The same GIC, at the same rate, produces very different after-tax results depending on the account holding it:
| Account | Tax on interest each year | Tax when money comes out |
|---|---|---|
| Non-registered | Yes (at your marginal rate) | No further tax (settled yearly) |
| TFSA | None | None |
| RRSP | None inside the account | Withdrawals taxed as income |
| FHSA | None inside the account | None for a qualifying first-home withdrawal (otherwise taxed) |
A TFSA shelters interest completely: nothing is reported and nothing is taxed, ever. An RRSP defers the bill instead: the contribution is deducted now, the interest compounds untaxed, and withdrawals are taxed as income later. An FHSA does both jobs at once, with deductible contributions going in and a tax-free withdrawal coming out for a qualifying first-home purchase. Each lane has its own market, and issuers do not always price them identically: the TFSA board, the RRSP board and the FHSA board each track their own lane.
The rate is the part you choose
The tax treatment of interest is set in Ottawa and is not up for negotiation. The rate is another matter: it varies widely between institutions for identical products, and it is the one part a saver gets to choose. Before committing money to any term, check the current GIC boards, and set a rate alert if you would rather have the movement come to you than keep checking for it.
Frequently asked questions
Do I have to report interest if I never received a T5?
Yes. The T5 threshold is about the issuer’s paperwork obligation, not your reporting obligation. Interest is taxable from the first dollar, slip or no slip.
When do I pay tax on a compound GIC that pays at maturity?
Annually, as the interest accrues. Your financial institution issues a T5 each year for the accrued amount even though nothing has been paid out. The payout at maturity is not taxed again; each year’s interest is taxed once.
Is interest earned inside a TFSA reported anywhere?
No. Interest inside a TFSA is not taxed and does not appear on your return. The same is true inside an RRSP or FHSA while the money stays in the account; RRSP withdrawals are then taxed as income when they happen.