Introduction:
The income received on investment by a business refers to the returns or profits earned from the investment activities of the business. While revenue is traditionally associated with the primary or operating activities of a business, there can be cases where investment income can be considered as revenue. In this response, we will explore whether income received on investment by a business can be classified as revenue, even if it is not a part of the primary activities or operating activities of the business.

Definition of Revenue:
Revenue is the income generated by a business from its primary or operating activities. It is the money earned from the sale of goods or services, which is essential for the day-to-day operations of the business. Revenue is reported on the income statement and is a key measure of a company's financial performance.

Investment Income as Revenue:
In certain cases, income received on investment can be considered as revenue, even if it is not directly related to the primary activities of the business. However, several factors need to be considered before classifying investment income as revenue:

1. Materiality: The materiality of the investment income needs to be assessed. If the income received on investment is significant and has a substantial impact on the overall financial position of the business, it may be appropriate to classify it as revenue.

2. Regular and Recurring: If the investment income is regular and recurring, and the business actively manages its investment portfolio, it may be appropriate to consider it as revenue. This applies when the business consistently earns income from its investments.

3. Intent and Purpose: The intent and purpose of the investment activities should be examined. If the business engages in investment activities with the primary objective of generating income, then the income received from those investments can be considered as revenue.

4. Accounting Treatment: The accounting treatment of investment income can influence its classification. If the income is recorded as revenue in the financial statements, it can be considered as revenue for reporting and analysis purposes.

Conclusion:
In conclusion, income received on investment can be classified as revenue, even if it is not a part of the primary activities or operating activities of the business. However, this classification depends on various factors such as materiality, regularity, intent, purpose, and accounting treatment. It is important to consider these factors and evaluate the specific circumstances of the business before deciding whether to classify investment income as revenue.