The Schedule C Comparative Analysis average estimates Percent of Sales column is based on IRS Table 2 - Nonfarm Sole Proprietorships: Income Statements, by Industrial Sectors, Tax Year 2017. This table is included as part of the IRS's
2025
fall statistics of income bulletin for sole proprietors. The report calculates the IRS average estimates as a percentage of sales (gross receipts less returns and allowances) using the average sales amount and the average income or expense amount for the business type indicated (or similar business type).
For example, assume that for offices of certified public accountants (PBA Code 541211), the average amount of receipts is $82,160 ($4,385,854,000 total receipts divided by 53,382 total returns). The average utilities expense is $2,122 for the same business code ($113,286,000 total utilities expense divided by 53,382 returns). The Schedule C - Actual vs. IRS Comparison Analysis Report assumes that the average amount of utilities expense for the offices of certified public accountants business code is 2.58 percent ($2,122 divided by $82,160) of their actual receipts.