GST/HST Reporting: What Small Businesses Need to Know
Understanding registration thresholds, input tax credits, and quarterly reporting requirements for GST/HST compliance.
Read ArticleCorporate Tax Filing Deadlines You Can’t Miss
Key dates for T1 general returns, corporate T2 filings, and GST/HST quarterly submissions. Know when payments are due to avoid penalties.
Why Missing Tax Deadlines Costs More Than Money
Tax deadlines aren’t suggestions. The Canada Revenue Agency takes them seriously — and so should you. Missing a filing date can result in penalties, interest charges, and complications that ripple through your entire business for years. We’ve put together a clear breakdown of the deadlines that matter most, so you’re never caught off guard.
Whether you’re running a sole proprietorship or managing a corporation, there’s a specific calendar you need to follow. Some deadlines are firm, others have a grace period. The good news? It’s not complicated once you understand the structure. Let’s walk through the key dates and what each one means for your business.
The Essential Filing Dates You Need to Know
Here’s the reality: Canada’s tax calendar runs year-round, not just in spring. Some dates are fixed, others depend on your business structure. Below are the deadlines that affect most businesses.
June 15
T1 General Return (Self-Employed)
If you’re self-employed or have business income, your T1 General is due by June 15. You’ve got until that date to file. Payment, though — that’s due April 30. It’s one of the quirks of Canadian tax: filing deadline is later than payment deadline.
April 30
T1 General Payment Due
If you owe taxes, they’re due April 30. This applies whether you’re filing June 15 or earlier. Miss this date and you’ll pay interest on the amount owing. The rate compounds daily, so even a few weeks late adds up quickly.
6 Months After Year-End
Corporate T2 Return
For corporations, the deadline is 6 months after your fiscal year ends. Most companies use a December 31 year-end, so that’s June 30. If you’ve got a different fiscal year, count forward 6 months from when yours closes.
Quarterly
GST/HST Returns
If you’re registered for GST/HST, you’re filing quarterly (or monthly, depending on your registration). Deadlines are the last day of the month following your reporting period. Miss it and you lose the ability to claim input tax credits, which costs real money.
Understanding What Each Deadline Really Means
Deadlines aren’t just random dates on a calendar. Each one represents a specific requirement, and understanding the difference between them can save you thousands in penalties and interest.
Take the difference between filing and paying. You might think they’re the same date — they’re not. You can file your return on time but still owe interest if your payment arrives late. The CRA tracks these separately. Filing is about getting your information submitted. Payment is about settling what you owe.
GST/HST deadlines are particularly important because missing them has a domino effect. When you file late, you can’t claim input tax credits until that return is filed. That means you’re out the money you paid in GST on your business expenses. For a small business, that’s a real cash flow problem.
- April 30 is firm — no extensions, no grace period
- June 15 for self-employed is firm but you still owe by April 30
- Corporate year-end determines your T2 deadline
- GST/HST quarterly deadlines depend on your reporting period
What Happens When You Miss a Deadline
Penalties aren’t designed to be harsh — they’re designed to encourage compliance. But they add up fast, especially when combined with interest.
Late Filing Penalty
5% of unpaid tax for the first year you’re late, plus 1% per month (up to 12 months). If you’ve been late before, it’s 10% plus 2% per month.
Interest on Late Payment
Compounds daily on any unpaid amount. The rate changes quarterly — currently around 8%. A $5,000 payment that’s 3 months late costs you roughly $100 in interest alone.
GST/HST Late Filing
You lose input tax credit entitlement for that period. If you’re owed a refund, you don’t get it. If you owe tax, you still have to pay it.
Corporate T2 Late Filing
$100 per day of lateness, up to $12,000. For a corporation, this gets expensive quickly. Plus you’re still paying interest on any taxes owing.
How to Stay on Top of Your Deadlines
The best approach? Don’t rely on memory. Tax deadlines are predictable — they follow the same calendar every year. That means you can build them into your business routine.
Start by mapping out your complete tax calendar. If you’re self-employed, you need April 30 (payment) and June 15 (filing) marked. If you’re incorporated, add your corporate T2 date six months after your year-end. If you collect GST/HST, note each quarterly deadline.
Then work backward. Don’t file on the deadline date — file two weeks early. This gives you time to catch errors, gather missing documents, or contact the CRA if something’s unclear. It also protects you from system delays or last-minute issues.
1
Create a tax calendar 12 months ahead. Include all filing deadlines, payment deadlines, and quarterly dates.
2
Set reminders 3 weeks before each deadline. This gives you time to prepare without rushing.
3
Keep records organized year-round. Don’t scramble to find receipts and invoices in March.
4
Consider working with an accountant for complex situations. The cost is less than paying penalties.
The Bottom Line
Tax deadlines aren’t something to manage at the last minute. They’re fixed dates that come around every year. Mark them on your calendar now — April 30, June 15, your corporate year-end plus 6 months, and quarterly GST/HST dates. Don’t wait until the week before to start preparing.
Missing a deadline costs money through penalties and interest. More than that, it creates stress and complications. The solution is simple: plan ahead, organize your records, and set reminders. Your business runs better when your taxes are handled with the same attention you give to everything else.
If you’re uncertain about any deadline or your specific filing requirements, reach out to a tax professional. It’s one of the best investments you can make for your business.
Educational Information
This article is for educational purposes only and doesn’t constitute tax advice. Tax deadlines and requirements can vary based on your specific business structure, jurisdiction, and circumstances. The Canada Revenue Agency (CRA) is the authoritative source for all tax deadline information. For personalized guidance about your particular situation, consult a qualified tax professional or accountant. Always verify current deadlines directly with the CRA before filing.
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