So in accounting there are 3 responsibility centers which are:

Cost Center
Profit Center
Investment Center

Why do these 3 need separate budgets?

I would add a fourth responsibility center, the revenue center. Why do the need separate budgets? So they can be monitored, and controlled, and someone can be accountable for revenue, cost, profit, and investments.

http://maaw.info/ResponsibilityAccountingConcept.htm

Thanks.

So, if you were to give an example of the kinds of decisions where incremental analysis would be used in each center, what examples would you give?

http://www.plu.edu/~mgtacctg/incremental_analysi.htm

We will be happy to critique your thinking.

These three responsibility centers (Cost Center, Profit Center, and Investment Center) require separate budgets because they have distinct objectives and responsibilities within an organization.

1. Cost Center: This center is responsible for managing and controlling costs in a business. Its objective is to minimize expenses while maintaining the required level of output or service. A separate budget is needed to allocate resources and monitor costs within the cost center. This budget allows cost center managers to plan, control, and evaluate their department's performance based on its cost efficiency.

2. Profit Center: Unlike the cost center, the profit center is responsible for generating revenue and profit. Its objective is to maximize profitability by increasing sales, reducing costs, or both. A separate budget is necessary to set sales targets, allocate resources, and monitor the financial performance of the profit center. This budget provides profit center managers with a clear plan and performance measurement framework to achieve their financial goals.

3. Investment Center: This center is responsible for making strategic investment decisions that contribute to the long-term growth and profitability of the organization. Its objective is to generate a return on investment (ROI) that exceeds the organization's cost of capital. A separate budget is required to allocate funds for capital investments, such as new equipment, facilities, or acquisitions. This budget helps investment center managers assess the financial viability of investment opportunities and evaluate their performance against expected returns.

By having separate budgets for each responsibility center, an organization can effectively allocate resources, monitor performance, and hold managers accountable for their respective goals. It enables better control and evaluation of each center's activities, as well as facilitates informed decision-making related to costs, revenues, and investments within the organization.