Tax Punjabi - Payroll

Payroll Mistakes That Cost Small Businesses Thousands

Category: Payroll Reading time: 8 min read Published: 1/3/2026

DIY payroll gone wrong? Learn about the most common payroll errors and how to avoid CRA penalties, back taxes, and employee disputes.

🎯 Key Takeaways
  • Misclassifying employees as contractors is the #1 costly mistake
  • Late remittances trigger automatic penalties (3-10%+)
  • Vacation pay errors lead to employee complaints and labour board issues
  • Missing T4s result in penalties and employee frustration
  • Professional payroll services often cost less than DIY mistakes

💸 The True Cost of Payroll Errors

You're a business owner, not an accountant. Payroll seems simple: calculate wages, write cheques, done. Right?

Wrong. Small payroll errors compound into big problems.

1️⃣ Mistake: Misclassifying Employees

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The Problem

Calling workers "contractors" to avoid payroll taxes.

The Cost
  • Back CPP contributions (employer + employee portions)
  • Back EI premiums (employer + employee portions)
  • Penalties: 10%+ on unpaid amounts
  • Interest going back up to 6 years
  • Workers' Comp fines
  • On $50,000 in wages: $10,000-$15,000+ in penalties

2️⃣ Mistake: Late Remittances

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The Problem

Missing the 15th of the month remittance deadline.

The Cost
  • 3% penalty if 1-3 days late
  • 5% penalty if 4-5 days late
  • 7% penalty if 6-7 days late
  • 10% penalty if more than 7 days late
  • 20% for repeat offenders
  • Plus compound interest daily

3️⃣ Mistake: Wrong Vacation Pay Calculations

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The Problem

Not tracking vacation entitlements properly, underpaying vacation pay.

The Cost
  • Employee complaints to labour board
  • Back pay for unpaid vacation
  • Administrative penalties
  • Reputation damage with employees

4️⃣ Mistake: Missing or Incorrect T4s

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The Problem

T4s not issued by February 28, or with wrong amounts.

The Cost
  • $100 penalty per T4 for late filing
  • Unhappy employees who can't file their taxes
  • Amended returns if amounts are wrong
  • CRA scrutiny of your payroll practices

5️⃣ Mistake: Statutory Holiday Errors

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The Problem

Not paying stat holiday pay, or calculating it wrong.

The Cost
  • Back pay to affected employees
  • Employment standards complaints
  • Potential for class action if systematic

✅ The Solution: Professional Payroll

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Cost Comparison

DIY Payroll + One Major Error:

  • Your time: 5 hours/month × $50/hour = $250
  • One late remittance penalty (10%): $500
  • Interest and corrections: $200
  • Total cost: $950+/month

Professional Payroll Service:

  • Monthly service: $50-$150
  • Accuracy guaranteed
  • Remittances filed on time
  • T4s prepared automatically
  • Total cost: $50-$150/month

Stop the Payroll Headaches

FinvoPay by Tax Punjabi handles your entire payroll - calculations, remittances, T4s, and compliance. Focus on your business.

This article is for educational purposes only. Consult a professional for your specific situation.