If you've ever asked yourself where your business is losing money, the answer often comes from a deeper understanding of costs. Coincidentally, I just brought up this topic because I see many people still confused about the difference between fixed costs and variable costs, which is actually very important for financial planning and investment decisions.

Let's start with fixed costs. These are expenses that do not change regardless of how much your business produces or sells. Office rent, regular employee salaries, insurance, depreciation of equipment, loan interest—all of these must be paid every month even if there are no sales on that day.

On the other hand, variable costs are costs that change according to the volume of production or sales. When you produce more, these costs increase; when you produce less, they decrease. Examples include raw materials used in production, direct labor, energy and water costs in the factory, packaging, shipping costs, and sales commissions—all of which depend on how much product or service you generate.

What I think is important is understanding that variable costs are factors you can control more easily than fixed costs. If sales decline, you can reduce production, which helps lower variable costs. But fixed costs remain the same. This is why managing variable costs is crucial.

When combining both types, total cost = fixed costs + variable costs. This is where business decisions become clearer. You need to know how much you must sell to cover all costs and still make a profit. This is called the break-even point.

Pricing is similar. If you understand how much the variable cost per unit is, you will know how to set the selling price to make a profit, along with understanding fixed costs that need to be allocated to each product.

Another important aspect is production planning. If the market demand is high, you can decide to invest in new machinery (which increases fixed costs) to produce more and reduce the variable cost per unit. This is a trade-off between the two types of costs.

In summary, fixed costs help you plan long-term budgets, while variable costs are factors you need to monitor closely because they change with market conditions. Understanding both will help your business become more stable and competitive.