I just realized that there is an important issue that many people often overlook, which is distinguishing between costs in a business. If you are learning about business management or investing, this will help you understand the figures in the budget more clearly.

Let's start by talking about fixed costs. Fixed costs refer to expenses that do not change regardless of how much the business produces or sells. Whether it's the year with the highest sales or the year with the lowest sales, these costs remain the same, such as office rent, employee salaries, insurance, or loan interest. All of these are expenses that must be paid whether or not customers come in.

What’s interesting is that fixed costs mean ongoing obligations, which is why financial planning is so important. If you do not cover these costs with your revenue, the business will suffer even if sales are happening.

In contrast, variable costs change according to the volume of production or sales. As sales increase, variable costs increase; as sales decrease, variable costs decrease. Examples include raw materials, direct labor, energy costs, packaging, or transportation—all of which depend on how much you produce.

Understanding the difference between these two helps you set the right product prices. If you know your fixed costs, you know how much you need to sell to break even. After that, any sales beyond that point are profit.

Another important point is the analysis of mixed costs, which means combining fixed and variable costs to get an overall picture of total costs. This helps you see how much you need to sell to make a profit and plan production efficiently.

Sometimes, businesses decide to invest in machinery to reduce variable costs (such as labor costs) in exchange for higher fixed costs (such as depreciation of machinery). This is a strategic decision that requires careful calculation.

The truth is, fixed costs are the foundation of business operations. If you cannot manage these costs well, the business cannot grow. Understanding your cost structure is the first thing every manager or entrepreneur should do because it affects every decision—from setting prices, hiring staff, to deciding whether to expand the business.