Gross sales and sales tax are separate numbers
Gross sales is the total dollar amount of goods or services you sold, before you subtract anything. It does not include the sales tax you collected. Sales tax is money that belongs to the state or local government — you are holding it temporarily on their behalf. When you report gross sales to the IRS or your state tax authority, you report the sale price alone, then list the sales tax collected as a separate line item.
This distinction matters because it affects how much income tax you owe and how you file your sales tax return. If you mix the two together, you will overstate your actual revenue and pay more income tax than you should.
Key Takeaways
- Gross sales is the price of goods or services sold, not including sales tax collected.
- Sales tax collected is reported separately on your sales tax return and is not your income.
- On your income tax return, you report gross sales minus any returns or discounts, but you do not subtract the sales tax you collected.
- If you use accounting software, it usually separates these automatically if you set it up correctly.
- Mixing gross sales and sales tax together inflates your reported income and can trigger an audit.
How gross sales appears on your income tax return
On Schedule C (Profit or Loss from Business) or on your business tax return, you report gross receipts or gross sales as a single line. This is the total money that came in from selling your product or service. If a customer paid you $100 for a haircut and you collected $8 in sales tax, your gross sales is $100. The $8 goes nowhere on your income tax return — it appears only on your sales tax return.
The IRS wants to know what you earned, not what you collected on behalf of the state. Your earnings are the $100. The $8 is a liability — money you owe to the government, not money you keep.
How sales tax collected is reported separately
When you file your sales tax return with your state or local tax authority, you report the total sales tax you collected during the period (usually monthly or quarterly). You then send that money to the government. On that same return, you also report your gross sales, so the tax authority can verify that your tax rate was applied correctly.
Some states ask you to report gross sales including tax, then subtract the tax to show the taxable amount. Others ask for gross sales before tax. The form itself will tell you which number goes where. The key point is that the sales tax return and the income tax return are two different documents going to two different agencies, and they each need the numbers broken out correctly.
Why this matters for your actual tax bill
If you report $100 in gross sales plus $8 in sales tax as $108 in gross sales on your income tax return, you have just told the IRS you earned $108 instead of $100. You will pay income tax on an extra $8 you did not actually keep. Over a year, if you collect thousands in sales tax, this error can cost you hundreds of dollars in unnecessary income tax.
It also creates a mismatch between your income tax return and your sales tax return. If your sales tax return shows $100 in taxable sales but your income tax return shows $108, an auditor will notice. The discrepancy flags your return for review.
How to keep them separate in practice
If you use point-of-sale software, accounting software like QuickBooks, or even a spreadsheet, set it up so that the sale price and the sales tax are in separate columns or separate line items from the start. When you record a $100 sale with $8 tax, enter it as $100 in the sales column and $8 in the tax column. Do not add them together in a single entry.
At the end of each month or quarter, your software should show you a total for sales and a separate total for tax collected. The sales total is what you report to the IRS. The tax total is what you report to your state and what you owe them. If your software does not separate them automatically, you will have to do it by hand — add up all the sales, add up all the tax, and keep them in two piles.
What happens if you are unsure which number to use
Look at the form or return you are filling out. It will ask for "gross sales," "total sales," "taxable sales," or "sales before tax." If it says "gross sales" or "total sales," use the amount before tax. If it says "sales including tax" or "total receipts," read the instructions carefully — some forms want you to enter the combined number and then subtract tax on a separate line.
Your state's sales tax return instructions will specify exactly what number they want and where. The IRS Schedule C instructions also specify. When in doubt, call your state tax authority or a tax preparer. A five-minute phone call costs nothing and prevents an error that could cost you money or trigger a review.
Frequently Asked Questions
If I collected $5,000 in sales and $400 in tax, what do I report as gross sales?
You report $5,000 as gross sales on your income tax return. The $400 in tax goes on your sales tax return only. Do not add them together on your income tax forms.
Does the IRS care about sales tax I collected?
The IRS does not collect sales tax — that is a state and local matter. But the IRS does care that you do not inflate your income by including tax collected. If your income tax return and sales tax return do not match, it raises questions.
What if I forgot to separate them and already filed?
You can file an amended return using Form 1040-X (for individuals) or an amended business return. If the error resulted in you overpaying income tax, you may receive a refund. It is worth correcting, especially if the amount is significant.
Do I need to report sales tax on my Schedule C if I am self-employed?
No. Schedule C asks for gross receipts from your business. You report the sale price only. Sales tax collected is listed separately on your sales tax return, not on Schedule C.
Can I deduct sales tax I paid as a business expense?
Sales tax you paid on business purchases may be deductible or may be added to the cost of the item, depending on the type of purchase and your state's rules. Sales tax you collected and remitted to the state is not a deduction — it was never your money to begin with.