Your April 30th Tax Filing Checklist: What Every Investor Should Review
The personal tax deadline is April 30th and for investors, there's more to think about than just your T4 slip. From reporting capital gains and RRSP deductions to T3s from trusts (which often arrive late) and a few commonly overlooked items. These can make a real difference to your final bill from CRA. Here's what to have ready before you file.
Slips to Gather
These should arrive by late February or early March. One of them, the T3, regularly shows up late. Know what to expect before you file.
T4 & T4A — Employment & Other Income
Your employer issues a T4 for wages, salaries, and source deductions. Pension income, annuities, and other income come on a T4A. These should arrive by the end of February, if you haven't received yours by early March, follow up with your employer, or pension provider.
T5 — Investment Income (Interest & Dividends)
T5 slips report interest from savings accounts and GICs, as well as dividends from Canadian corporations. Eligible dividends and non-eligible dividends are taxed differently — make sure both amounts are reported separately on your T5. Your financial institution issues these by late February.
T3 — Trust & Mutual Fund Income
If you hold mutual funds, ETFs in trust structures, or investments in a trust account, you'll receive a T3 slip. These are the last slips to arrive, sometimes not until April or early May, and are one of the most common reasons people need to amend a return after filing. Trusts are required to file by March 31, but delays happen. Follow up with your advisor or institution by mid-April if yours hasn't arrived.
Registered Accounts
These deductions reduce your taxable income directly. They require action on your part, and the rules around each account are slightly different.
RRSP Contributions & Deductions
If you made an RRSP contribution before the March 2, 2026, deadline, make sure you're claiming it on your 2025 return. The maximum deduction limit for 2025 is $32,490 or 18% of your 2024 earned income — whichever is less. Your exact available room is on your most recent Notice of Assessment in CRA My Account.
You don't have to deduct your RRSP contribution in the same year you made it. If your income was lower in 2025 than you expect it to be in future years, you can carry the deduction forward and use it in a higher-income year — where it's worth more. This is a straightforward and often overlooked strategy.
Spousal RRSP Contributions
If you contributed to a Spousal RRSP in 2025 or in early 2026 before the deadline, the deduction goes on your return — not your spouse's. The money sits in their name and will eventually be taxed as their income when withdrawn. After a 3-year seasoning period, this is one of the most effective income-splitting tools available to couples with different income levels.
Spousal RRSPs work best when one partner earns significantly more. The higher earner gets the deduction now, and the lower earner pays tax on withdrawal at retirement — ideally at a lower rate.
FHSA Contributions (First Home Savings Account)
If you contributed to an FHSA in 2025, that contribution is fully deductible — up to $8,000 for the year, with a $40,000 lifetime limit. Only contributions made in calendar year 2025 count toward this return. Make sure your FHSA contribution receipt is included when you file.
Unused FHSA room carries forward, but only up to $8,000 maximum. If you opened a FHSA in 2025 and you didn't contribute during 2025, you can put in up to $16,000 in 2026 ($8,000 new room plus $8,000 carry-forward). If you haven't opened one yet and you're eligible, opening an account before December 31, 2026, starts your room accumulating even if you don't contribute right away.
TFSA — Confirm Your Contribution Room
The TFSA doesn't give you a tax deduction, but it's worth reviewing at tax time. The 2025 annual limit is $7,000. If you've been eligible since 2009 and have never contributed, your cumulative room is now $102,000. Unused room carries forward indefinitely. Log into CRA My Account to check but note that the number shown lags by about a year, so cross-reference with your own records.
Investment Income to Report
Capital Gains & Losses from Selling Investments
If you sold any investments in 2025; stocks, ETFs, mutual funds, or real estate other than your primary home, you have a capital gain or loss to report on Schedule 3. In Canada, 50% of a capital gain is taxable. Capital losses can offset gains in the same year or be carried back up to 3 years (2024, 2023, 2022) or carried forward indefinitely.
Principal Residence — Did You Sell Your Home?
If you sold your primary home in 2025, you almost certainly qualify for the Principal Residence Exemption if it was your principle home for the entire time you owned it — meaning no tax on the gain. But you still have to report the sale to CRA on CRA Form T2091 and Schedule 3, even if the gain is fully exempt. This has been mandatory since 2016. Failing to report it can result in a penalty of up to $8,000.
Deductions & Credits Worth Claiming
Investment Loan Interest (Carrying Charges)
If you borrowed money to invest, through a margin account, investment loan, or line of credit, the interest you paid in 2025 is fully deductible. This is one of the most consistently missed deductions in Canada. Keep your year-end interest statements from your brokerage or lender. The interest must be on money borrowed to generate investment income.
Charitable Donations
Donations to registered Canadian charities generate a non-refundable federal tax credit of 14.5% for 2025 on the first $200 and 29–33% on amounts above $200. Keep official donation receipts — electronic receipts are accepted. You can also claim donations from the previous 5 years if you haven't claimed them before.
Donating publicly listed securities stocks or ETFs directly to a charity eliminates the capital gains tax on any appreciation entirely, and you still receive the full donation receipt for fair market value. This is significantly more tax-efficient than selling first and donating the cash proceeds.
Medical Expenses
Medical expenses are deductible once they exceed the lesser of 3% of net income or $2,834 for 2025. The list of eligible expenses is broader than most people expect — dental, vision, prescriptions, certain devices, and therapy all qualify. You can claim any 12-month period ending in 2025, and you can combine expenses with your spouse to maximize the credit.
Know Both Deadlines
April 30, 2026 is both the filing deadline AND the payment deadline. Your return must be submitted, and any balance owing must be paid by that date. Interest starts accruing daily after April 30 at the CRA prescribed rate.
Self-employed? You and your spouse have until June 15, 2026, to file — but any balance owing is still due April 30. Interest applies to any unpaid balance after that date, regardless of your filing extension..
After You File — Things Worth Thinking About for Next Year
Once you've filed, your return is a useful document — it tells you exactly what your financial picture cost you in taxes. Take a few minutes to ask these questions before you close the file for another year.
The Real Opportunity
Most of the value in tax planning happens before April 30, not on it. The deadline is when the consequences of last year's decisions show up. The investors who come out ahead are the ones who reviewed their situation, and made changes when required.
Wondering if everything is working together?
Filing your return is a starting point, not a finish line. If you want to talk through what your 2025 return tells you about your financial situation — whether that's registered account strategy, income planning, or how your investments are structured — we're happy to have that conversation.
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