Gross income can also be referred to as total revenue, gross earnings, pre-tax income, or top-line income. Total earnings refer to the sum of all the money an individual or company receives through different sources before any deductions or taxes are taken out. Gross earnings encompass not only salary or wages but also profits from investments, rental income, and other sources of revenue. Pre-tax income is the amount of money that an entity earns before taxation, while top-line income is a term used to describe a company's total revenue or sales. All these synonyms convey the same meaning as gross income.