With access to free tax prep checklists, deadline reminders, and other helpful tools, the hub has everything you need to file your business taxes with confidence and ease.
See how Small-Books can support your business this tax season.
Explore the tax hub resources
Filing deadlines
Find your filing deadline and form instructions here, separated by filing type.
Tax deductions & credits
Top deduction lists and how-to guides for lowering your small business tax bill.
Tax prep & filing
Let Small-Books help! We will get your business taxes prepared and filed with time to spare.
Update your tax filing experience with Small-Books
Tax filing is different as a Small-Books monthly bookkeeping member. We get your books caught up and CRA compliant, and provide a year-end financial package with everything you need to file. In fact, we can take care of your filing too! With Small-Books’ monthly bookkeeping plan, there's no extra fees, no year-end surprises—just extra tax support you can reply on.
TAX DEADLINES
Income tax filing deadlines
Don't wait until the last minute to start prepping for tax season. Consider this your official filing cheat sheet.
Employers
March 2, 2026
The T4 filing deadline for the 2025 tax year is Monday, March 2, 2026. Employers must submit T4 slips and the summary to the CRA and send them to employees by this date because February 28, 2026, falls on a Saturday.
Employed individuals
April 30, 2026
The tax-filing deadline for most individuals is April 30th. BUT, if you are self employed, you get a filing extension…
Sole proprietorships and partnerships
June 15, 2026
If either you, your spouse or common law-partner are self-employed, you have until June 15 to file your return.
Generally speaking, anyone who runs an unincorporated business in Canada is considered a sole proprietor or partner by the CRA, and needs to file a T2125.
Important: the extension only applies to filing, any balance owing is still due April 30th whether or not you have self employment.
Penalty for late filing
If you owe tax and file late, the CRA charges 5% of your 2025 balance owing, plus 1% for each full month it is late, up to 12 months.
The CRA suggests filing early, and electronically, to avoid processing delays.
Tax Forms
T4 Slip, Information for Employers
Form T1, General Tax Return
Form T2125 Statement of Business or Professional Activities
Income tax payment deadline
The payment deadline is April 30, 2026
If you have an income tax balance owing, payment is due by April 30.
If you, your spouse or common law-partner are self-employed, the deadline for paying any taxes owed remains April 30, but you have until June 15th to file the tax returns. This extended deadline acknowledges the additional complexity often involved in self-employed tax filings, such as calculating business expenses and potentially variable income.
Consequences of Missing the Tax Deadline
Missing the April 30 payment deadline will result in penalties and interest that can add up quickly.
Resources
TAX DEDUCTIONS & CREDITS
Every deduction and credit accounted for
See what expenses you're eligible to use to help lower your tax bill, and benefit from our free resources to make sure you take advantage of the savings.
Year End Tax Planning Guide
Consider this your roadmap to help you get organized, reduce your tax burden, and keep more money in your pocket.
Small Business Tax Deductions
Check out the most common small business tax deductions to make sure you don’t miss any!
Fillable Business Statement
Download our free fillable business statement that will show you all the info needed for your filing.
What’s new on the 2025 income tax and benefit return
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Under proposed changes starting July 1, 2025, the lowest individual income tax rate will be reduced from 15% to 14%. Since the change takes effect halfway through the year, the full-year lowest marginal individual income tax rate for 2025 will be 14.5%.
The rate applying to most non-refundable tax credits will continue to be the same as the lowest marginal individual income tax rate.
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The federal fuel charge ended April 1, 2025. As a result, the return of fuel charge proceeds to farmers tax credit for the 2024-2025 fuel charge year will be the final credit available to certain eligible farming businesses. For more information, see Line 47556 – Return of fuel charge proceeds to farmers tax credit.
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Under proposed changes, a new non-refundable tax credit was introduced to effectively maintain a 15% rate for certain non-refundable tax credits claimed on amounts over the first income tax bracket threshold of $57,375 for 2025.
For more information, see Line 34990 – Top-up tax credit or the chart for line 34990 on your Federal Worksheet.
TAX PREP & FILING
Work with the expert small-business tax team your business deserves
Not a numbers person? We can help!
Whether you have tax-ready business statements, or need a little more help getting prepared, you can count on Small-Books to get you filed with time to spare.
Book a free tax prep consultation with a small business expert to learn what documents you need to prepare for tax filing.
Prefer to skip the small talk and jump right into filing? You can start by filing out our income tax intake form to get the ball rolling and we will contact you for the next steps.