It's the time of year when consumers and business owners alike are turning a blind eye to the pending date on the calendar: April 15. In the case of business owners with commercial property tax bills due, that date you may be shielding your eyes from is May 15—the deadline for filing property tax protests. If you own commercial property, your annual tax bill is likely a substantial expense. Unfortunately, according to the National Taxpayers Union Foundation, around 30-60% of taxable properties in the United States are over-assessed, which—you guessed it—equals higher tax bills. Sadly, even though most consumers and businesses are overpaying due to inaccurately calculated properties, it’s predicted that less than 5% of taxpayers are challenging the assessment. Are you curious if your business is overpaying? Check out the list below that features 6 sure fire ways to help you determine whether our not you're overpaying on your commercial property taxes.