Answer:
Misclassificationof workers: Usually employers classify an employee as an independent contractor rather than a employee. If this happen the IRS can collect taxes back for 3 years up to 45%
Failing to pay payroll taxes: This is a very common mistake, specially for small businesses. The fines that are applicable depend on the number of days late. See the table below:
# Days Late Penalty
1 – 5 days 2%
6 – 15 days 5%
16+ days 10%
10+ days 15%
after first IRS
bill