For tax purposes, your income from your business may include not only gross receipts or sales, but other related sources of income, such as interest on your business checking account or income incidental to your business. Report business income as follows:
If you use the cash method of accounting, your gross receipts or sales are all payments you received in the course of the business year. If you have a business checking account, this is generally the amount of money you deposited in your business bank account less deposits not from sales, such as fund transfers, loans, interest, sales tax collected, and refunds. Add to this amount any cash receipts you do not deposit and the fair market value of goods and services you receive as payment in your business.
If you use the accrual method of accounting for your business, your gross receipts or sales are generally the income you earned in the course of your business during the year, even if you did not receive payment for all of your earnings before the end of the year. For additional information on accounting methods, see IRS Publication 334, Tax Guide for Small Business, on the IRS Web site.