If you've ever wondered why some companies have to pay expenses even when they aren't selling any products, it's because they always have fixed costs. And this is one of the most important things entrepreneurs need to understand.

In fact, business costs are divided into two main types: fixed costs and variable costs, which change according to production volume. The difference between these two is very important for investment decisions and pricing strategies.

Let's start with fixed costs. These costs are characterized by their unchanging nature regardless of how much you produce. Whether this month you sell a lot or a little, these costs remain the same, such as office rent, employee monthly salaries, business insurance, or even interest on loans that the business must pay every month.

Why are these costs important? Because they are ongoing obligations that the company must bear, whether the business is growing or declining. Understanding fixed costs helps the business plan finances better and know how much it needs to sell to cover these basic costs.

A clear example is factory rent. Whether you produce one item or one thousand items, you still have to pay the full rent. The same goes for management team salaries—they must be paid as agreed, regardless of whether this month's sales are good or bad.

In contrast, variable costs are costs that change according to production or sales volume. The more you produce, the higher these costs become. This type of variable cost includes raw materials used in production, direct labor wages for workers on the production line, energy and water used in the factory, or packaging and shipping costs.

For example, if you produce shirts, producing 100 shirts requires buying fabric for 100 units. If you produce 500 shirts, the fabric cost increases accordingly. Wages for factory workers working based on production volume also increase, as does the energy used for manufacturing.

The importance of distinguishing these two types of costs is that it allows businesses to control costs intelligently. If you know which costs are fixed, you'll know the sales volume needed to break even. If you know which are variable costs, you can find ways to reduce costs, such as negotiating prices with suppliers or improving production efficiency to lower raw material costs per unit.

Combining and analyzing these two types of costs is called mixed cost analysis. This helps businesses understand their cost structure deeply and provides a foundation for critical decisions like setting product prices, planning production, or evaluating whether new investments will be beneficial.

When setting product prices, you need to ensure that the price covers both fixed and variable costs and still leaves a profit for the business. If you set the price too low, even if you sell a lot, you might not make a profit because of high costs.

Production planning is similar. If you know how much fixed costs are and the variable cost per unit, you can calculate how much to produce to break even and how much more to produce to make a profit.

In reality, effective cost management is what separates successful businesses from those that fail. Successful companies know their costs well, understand which costs they can control, and which fixed costs they must accept. They use this knowledge to make decisions about investments, pricing, and growth planning.

Therefore, if you're an entrepreneur or thinking of becoming one, take some time to analyze your business costs. Distinguish which are fixed costs and which are variable costs. This will help you manage your business better and make smarter decisions.