Common CRA compliance mistakes businesses should avoid

Staying compliant with the Canada Revenue Agency (CRA) sounds straightforward until you're hit with a penalty you didn't see coming. Filing on time, understanding the rules, keeping clean records, and avoiding the mistakes the CRA flags year after year—all of it matters. In 2024–25 alone, the CRA completed 84,356 compliance cases with a fiscal impact of 18.1 billion, resolving 86.6 billion in collectible tax debt, a 46.9% increase over pre-pandemic levels. [18]

This guide walks you through the most frequent CRA compliance errors businesses make and tells you how to steer clear of them.

Missing filing deadlines

Late filing is one of the most common—and most expensive—compliance mistakes. The CRA applies a penalty of 5% of the unpaid tax due on the filing deadline, plus 1% for each complete month the return is late, up to 12 months. For repeat offenders who've been penalized in any of the three previous tax years and received a demand to file, the penalty doubles to 10% of unpaid tax plus 2% per month, up to 20 months. [1]

Even if no tax is owed, repeated late filings increase CRA scrutiny and can trigger an audit. The simplest fix is to file on time, every time—even if you can't pay the full balance owed. Filing on time and paying late is always cheaper than doing both late. [2]

Pro tip: If you can't pay your full balance by the deadline, file anyway and set up a payment arrangement through My Business Account—the CRA's secure online portal where businesses can manage tax accounts, view balances, submit returns, and arrange payments. From there, you can schedule pre-authorized debits to pay down your debt over time, avoiding the late-filing penalty entirely while you clear the balance.[14][17]

Failing to report all income

The CRA cross-references your return against information slips from banks, employers, payers, and digital platforms. Unreported income—whether from side jobs, the platform economy, online business activities, or foreign investments—is a top audit trigger. The CRA explicitly notes that income from ride sharing, accommodation sharing, gigs, peer-to-peer sales, and social media activities must be reported. [3]

Pro Tip: Before filing, collect all T4, T5, T4A, and T5018 slips and reconcile them against your general ledger. Discrepancies between your return and third-party slips are one of the fastest ways to trigger a CRA review.[4]

Payroll remittance errors

The CRA treats payroll deductions—income tax, CPP, and EI—as trust funds. Failing to withhold or remit these amounts is one of the most aggressively pursued compliance violations. The penalty for failure to deduct is 10% of the amount not withheld, jumping to 20% for a second or subsequent offense in the same calendar year if the failure was made knowingly or under gross negligence. [5]

Late remittances follow a tiered penalty structure:

• 3% if 1–3 days late

• 5% if 4–5 days late

• 7% if 6–7 days late

• 10% if more than 7 days late.

Repeat late remittances in the same year can attract a 20% penalty. On top of penalties, compound daily interest accrues on the outstanding balance. [6]

Pro tip: Corporate directors can be held personally liable for unremitted payroll deductions. Automating payroll remittances through your accounting software eliminates the risk of missed deadlines and protects directors from personal exposure.[7]

GST/HST registration and filing mistakes

Businesses with annual taxable revenues exceeding $30,000 are required to register for a GST/HST account. Failing to register on time means you've been collecting tax you weren't authorized to collect, or worse, not collecting it at all when you should have been. [8]

Common GST/HST errors go beyond late registration. They include charging the wrong rate for your province, misclassifying sales as exempt or zero-rated, claiming ineligible Input Tax Credits (ITC), and filing returns using the wrong reporting frequency. The CRA charges a penalty of 1% of the outstanding GST/HST amount plus 0.25% for each full month the return is overdue. [9]

Pro tip: Track your revenue monthly. If you anticipate crossing the $30,000 threshold, register proactively rather than retroactively. Voluntary registration also lets you claim ITC on business expenses even before you hit the mandatory threshold.[10]

Poor recordkeeping

The CRA requires businesses to keep records for at least six years from the end of the last tax year they relate to. These records must support every income and expense claim on your return. If you're selected for a review or audit and can't produce documentation, the CRA can reassess your return, disallow deductions, and apply penalties. [3]

Good records include bank statements, invoices, receipts, payroll records, T4 slips, and GST/HST documentation. The CRA specifically recommends reconciling your income against independent sources like T4 slips and bank statements to ensure accuracy. [11] BDO Canada echoes this in their audit readiness guidance: ensure your tax compliance is up to date, corporate records are well documented, and minute books are maintained—regardless of whether you're currently under audit. [19]

Pro tip: The CRA offers a free Liaison Officer service for small business owners. A Liaison Officer will walk you through common tax errors, bookkeeping best practices, and CRA digital tools; the meeting is 100% confidential.[12]

Misclassifying workers

Treating employees as independent contractors to avoid payroll obligations is a compliance risk the CRA actively monitors. Misclassification means you haven't been withholding and remitting income tax, CPP, and EI. Here, the CRA can reassess you for the full amount plus penalties and interest. The CRA looks at the level of control, ownership of tools, chance of profit or loss, and integration into the business to determine the relationship. [5]

Pro tip: Use CRA guide RC4110, Employee or Self-Employed?, to assess every working relationship before onboarding. The guide walks through the four-factor test—control, tools, chance of profit/risk of loss, and integration—that the CRA and courts apply to determine status.[15]

Not using the voluntary disclosures program

If you've already made a compliance error, the CRA's Voluntary Disclosures Program (VDP) lets you come forward to correct mistakes on previously filed returns or to file returns you should have filed. A valid disclosure can result in reduced penalties and partial interest relief. The key requirement is that the disclosure must be voluntary. If the CRA has already contacted you about the issue, the program no longer applies. [13]

Pro tip: As of October 2025, the CRA simplified VDP documentation requirements. For Canadian-sourced income, you only need records for the most recent six years; for foreign-sourced income, ten years. You don't need to submit documentation for tax years that are already accurate and complete.[16]

Quick compliance checklist

• File all returns by their deadlines, even if you can't pay in full.

• Reconcile T4, T5, T4A, and T5018 slips against your general ledger before filing.

• Remit payroll deductions (income tax, CPP, EI) on or before each due date.

• Monitor revenue monthly and register for GST/HST before crossing the $30,000 threshold.

• Keep all records for at least six years from the end of the relevant tax year.

• Use CRA guide RC4110 to classify every worker before onboarding.

• Correct past errors through the Voluntary Disclosures Program before the CRA contacts you.

Final thoughts

CRA compliance doesn't have to be complicated, but it does require attention. The penalties for common mistakes like late filings, missed remittances, and unreported income add up fast and compound over time. The good news is that most of these errors are entirely preventable with organized records, automated processes, and awareness of your obligations.

Tools like Zoho Books and Zoho Payroll can help automate payroll remittances, GST/HST tracking, and filing deadline management so you can stay compliant without the manual overhead.