Can we call the income received on investment by the business "revenue"?

Yes, we can refer to the income received on investment by a business as "revenue." However, it is important to understand the specific context and definition of revenue in order to accurately classify investment income.

Definition of Revenue:
Revenue is the total amount of money earned by a business from its primary activities, such as the sale of goods or services. It represents the inflow of assets resulting from these activities, which leads to an increase in equity.

Investment Income:
Investment income refers to the returns earned by a business from its investments. These investments can include stocks, bonds, real estate, or any other financial instruments held by the business.

Classification of Investment Income:
When it comes to classifying investment income as revenue, it depends on the nature of the business and the purpose of the investment. Here are a few scenarios to consider:

1. Trading or Investment Business:
- If a business is primarily engaged in trading or investing activities, such as a brokerage firm or an investment fund, the income generated from investments is considered revenue. This is because the primary objective of these businesses is to generate income from investments.

2. Non-Investment Business:
- For businesses that are not primarily engaged in trading or investing activities, such as a manufacturing company or a service provider, investment income may not be considered revenue.
- In this case, investment income is often classified separately as "other income" or "non-operating income" in the financial statements. This is because the main source of revenue for these businesses is derived from their core operations, such as selling products or providing services.

Conclusion:
In summary, the classification of investment income as revenue depends on the nature of the business and its primary activities. If a business is primarily engaged in trading or investing activities, investment income can be considered revenue. However, for businesses whose main source of income is derived from core operations, investment income is often classified separately as "other income" or "non-operating income." It is important to analyze the specific circumstances and accounting principles applicable to the business in order to accurately classify investment income.