Quick summary: This guide tells you what to do for filing your 2025 Canadian tax return in 2026 under the new Income Tax Act 2025. It lists key deadlines, where to find the law and official rates, and gives step-by-step actions for individuals, self-employed people, and small businesses. Practical examples, exact URLs and common pitfalls are included so filers can act with confidence during the 2026 tax season.

Quick-reference at a glance

Key dates and numbers for Canadians dealing with the Income Tax Act 2025 (tax year 2025, filing in 2026):

  • Filing deadlines: normally you must file by April 30, 2026; if you're self-employed you can file later, but remember any tax owing is still due on April 30.
  • RRSP contribution deadline for 2025: 60 days after Dec 31, 2025 — March 1, 2026.
  • Instalment threshold: balance owing last year greater than $3,000 (federal) — $1,800 for Quebec residents.
  • GST/HST small supplier threshold: $30,000 in taxable revenues.
  • Late-filing penalty: 5% of balance owing plus 1% per full month to a max of 12 months; higher penalties apply for repeat late filers.
  • Official pages: Income Tax Act (Justice Canada): https://laws-lois.justice.gc.ca/eng/acts/I-3.3/ — CRA tax information: https://www.canada.ca/en/revenue-agency.html — NETFILE: https://www.canada.ca/netfile

Prerequisites

Get these documents together before you begin — it speeds things up and cuts down on mistakes.

  • Social Insurance Number (SIN) and proof of residency status — citizenship, permanent resident card, work permit or provincial health card can help establish residency for tax purposes.
  • All slip documents for 2025: T4 (employment), T5 (investment), T3 (trust income), T4A (pension/other income), T4E (employment insurance), and T5018 if you did contract construction work. Keep receipts for RRSPs, childcare, medical, tuition, and charitable donations.
  • Access to CRA My Account: https://www.canada.ca/my-cra-account or a CRA-certified NETFILE software if filing electronically. If using an accountant, set up Represent a Client: https://www.canada.ca/en/revenue-agency/services/e-services/represent-a-client.html
  • Knowledge of whether you must remit quarterly instalments — check last year’s Notice of Assessment or the CRA instalments page: https://www.canada.ca/en/revenue-agency/services/taxes/payments/instalments.html
  • Banking details for direct deposit. CRA pays refunds faster by direct deposit — set it up in My Account or by submitting a void cheque to CRA.

Step-by-step: How to comply under the Income Tax Act 2025

Use the steps below to prepare and file your 2025 return under the new Act — the numbered layout helps you follow along.

  1. 1. Confirm residency and filing obligations

    First, confirm your tax residency — whether you're a resident, non‑resident, or deemed resident — since that decides what income you must report. Residency determines which income you report. For example, factual residents report worldwide income; non-residents report only Canadian-source income. If you changed residency during 2025, gather travel records, lease agreements and utility bills — CRA looks at ties to Canada to decide residency. Check CRA's residency guidance: https://www.canada.ca/en/revenue-agency/services/tax/international-non-residents/individuals-leaving-entering-canada-non-residents.html

  2. 2. Collect slips and receipts

    Collect all T‑slips, receipts and statements for 2025. If an expected slip is missing, contact the payer early rather than waiting. Banks and investment firms issue T5/T3 slips for interest and dividends. If anything's missing, contact the payer early — most institutions reissue slips within weeks. Keep originals and scanned copies; CRA may request them up to six years after filing.

    Mastheads

  3. 3. Choose deductions and credits to claim

    Review common deductions: RRSP contributions (deadline March 1, 2026), childcare expenses, moving expenses if you moved for work or school, union and professional dues, and investment carrying charges. Non-refundable credits include the basic personal amount, eligible dependants, and tuition. Claim refundable credits like the GST/HST credit or Canada Workers Benefit if eligible. If unsure which credits apply, use CRA's calculators and benefit eligibility pages: https://www.canada.ca/en/revenue-agency/services/benefits.html

  4. 4. Calculate taxable income and tax payable

    Right now, start with total income, subtract deductions to get net income, then apply non-refundable credits to reduce tax payable. Use certified tax software or CRA's tax package for 2025 (available early 2026). If you owe tax, plan to pay by April 30, 2026 to avoid interest and penalties. If you made instalments through 2025, compare instalments to final balance to determine if you're owed a refund or owe more.

  5. 5. File electronically or by paper

    Filing with NETFILE-certified software is usually quickest; if you sign up for direct deposit, you'll typically get refunds faster than by mail. NETFILE: https://www.canada.ca/netfile. Paper returns are accepted but take longer to process. If you’re self-employed, you can still file electronically but remember the June 15 deadline is for filing only, not payment.

  6. 6. Pay balance or set up a payment plan

    Pay online through CRA My Payment, by online banking, or at your financial institution. If you can’t pay in full by April 30, 2026, contact CRA to arrange a payment plan — interest will still apply but CRA often negotiates monthly payments. Avoid using third-party tax loan products — they can be expensive.

  7. 7. Keep records and respond to notices

    Retain records for six years from the end of the tax year. If CRA sends a Notice of Assessment or Request for Information, respond promptly — typical response windows are 30 to 90 days. If assessed incorrectly, you can file a notice of objection within 90 days of the assessment date.

Tips for specific situations

Small business owners, rental property owners and those with capital gains have extra steps.

  • Small businesses: track GST/HST registration, collect and remit net tax on time, file T2 if incorporated. Use CRA’s business pages: https://www.canada.ca/en/revenue-agency/services/tax/businesses.html
  • Rental income: keep detailed logs of receipts and deductible expenses — repairs, insurance, property taxes and interest. Capital cost allowance (CCA) can be claimed but affects capital gains on sale later.
  • Capital gains/losses: report dispositions in the year they occur. Only 50% of capital gains are taxable; capital losses can offset capital gains in the same year or be carried back or forward.
  • Foreign property: if you owned specified foreign property with a total cost of more than CAN$100,000 at any time in 2025, file Form T1135.

Common mistakes to avoid

Errors cause delays and penalties — these are the usual suspects.

  • Missing slips: double-check all T-slips before filing. If you forget a slip, file an adjustment through My Account or submit a T1 Adjustment Request.
  • Wrong SIN or bank info: typos cause refunds to be delayed or misdirected. Verify numbers twice.
  • Claiming ineligible expenses: only allowable expenses listed in CRA guides should be claimed. For example, personal expenses aren't deductible as business expenses.
  • Ignoring instalment notices: if CRA tells you to make instalments and you don’t, you may owe interest and penalties on underpaid amounts.
  • Failing to report world income if you’re a resident: that can trigger reassessments and penalties.

Where to find official law, rates and forms

Always use official federal and provincial pages for up-to-date rates and forms:

  • Income Tax Act (Justice Canada): https://laws-lois.justice.gc.ca/eng/acts/I-3.3/
  • Canada Revenue Agency main site: https://www.canada.ca/en/revenue-agency.html
  • My Account: https://www.canada.ca/my-cra-account
  • NETFILE: https://www.canada.ca/netfile
  • GST/HST information: https://www.canada.ca/gsthst
  • Notice of Objection and appeals: https://www.canada.ca/en/revenue-agency/services/tax/individuals/appeal-a-tax-assessment.html

When to get professional help

Hire a tax professional if your tax situation is complex — split income, trusts, cross-border income, large dispositions, or if you’re under audit. Use a Chartered Professional Accountant (CPA) or an accredited tax preparer who’s registered with CRA. If representation is needed, set up Represent a Client: https://www.canada.ca/en/revenue-agency/services/e-services/represent-a-client.html

Related Articles

The Income Tax Act 2025 phrase is often used by Canadians researching the rules that apply to tax year 2025 returns filed in 2026. The practical steps are straightforward: confirm residency, gather slips, claim the deductions and credits you qualify for, file on time and pay what you owe by April 30, 2026. Keep records for six years, respond to CRA requests quickly, and get professional help for complex matters — that keeps surprises to a minimum.

This article was created with AI assistance.