======Cost Structure======
The Cost Structure of a company is the complete breakdown of all the different types of costs it incurs to stay in business. Think of it as the company's financial DNA—it dictates how the company spends money to make money. Every expense, from the CEO's salary to the electricity bill to the raw materials for a flagship product, is part of this structure. For a [[Value Investing|value investor]], analyzing the cost structure is not just an accounting exercise; it's a critical investigation into a company's resilience, profitability, and long-term potential. The core of this analysis lies in splitting all costs into two fundamental categories: [[Fixed Costs]] and [[Variable Costs]]. A business dominated by fixed costs, like a railroad, behaves very differently from one dominated by variable costs, like an e-commerce seller using a third-party fulfillment service. Understanding this mix helps you predict how a company will perform in both good times and bad.
===== The Two Pillars of Cost: Fixed vs. Variable =====
Every cost a company has can be sorted into one of two buckets. Grasping the difference is fundamental to understanding a business's inner workings.
==== Fixed Costs: The Unwavering Bills ====
As the name suggests, **Fixed Costs** are the expenses that don't change, no matter how much a company sells or produces. They are the background hum of the business—the bills that arrive like clockwork, whether the company has a record-breaking quarter or a terrible one. A company with high fixed costs has to sell a certain amount just to keep the lights on.
//Common examples of fixed costs include://
  * Rent for office or factory space
  * Salaries of administrative and management staff
  * Annual insurance premiums
  * Property taxes
  * [[Depreciation]] on buildings and equipment
==== Variable Costs: The Pay-as-You-Go Expenses ====
**Variable Costs** are the complete opposite. These costs move in lockstep with a company's production or sales volume. If the company makes more widgets, it needs more raw materials. If it sells more products, it pays more in sales commissions. This direct relationship makes them more flexible than fixed costs. When business slows down, variable costs naturally decrease, providing a cushion against losses.
//Common examples of variable costs include://
  * Raw materials used in manufacturing
  * Direct labor costs (e.g., wages for factory workers paid per hour or per unit)
  * Sales commissions
  * Shipping and packaging costs for each unit sold
  * Credit card processing fees
===== Why Does Cost Structure Matter to an Investor? =====
A company's cost structure isn't just a list of expenses; it’s a powerful indicator of its strategic position, risk profile, and profit potential.
==== Unlocking Operating Leverage ====
This is where things get exciting. A company with a high proportion of fixed costs has high [[Operating Leverage]]. This means that once revenue surpasses the [[Breakeven Point]] (the level of sales needed to cover all fixed costs), each additional sale can generate a massive boost in profit.
Consider a software company. It might spend $10 million to develop a new application (a huge fixed cost). But the variable cost of selling one more digital copy is nearly zero. After selling enough to cover that initial $10 million, almost every dollar from future sales flows directly to the bottom line. This creates explosive profit growth. The flip side is also true: if sales fall short of the breakeven point, the high fixed costs can lead to equally dramatic losses.
==== Spotting a Moat ====
A superior cost structure can be a formidable [[Competitive Advantage|economic moat]]. Companies that achieve vast [[Economies of Scale]], like Walmart or Amazon, use their size to negotiate lower prices from suppliers and operate with incredible efficiency. This creates a lower cost structure than their smaller rivals can ever hope to match. This advantage allows them to either offer lower prices to customers, grabbing market share, or enjoy fatter profit margins.
==== Predicting Profitability and Risk ====
The cost structure is a crystal ball for a company's stability.
  * **High Fixed Costs:** These businesses (e.g., airlines, car manufacturers, steel mills) are capital-intensive. They can be incredibly profitable during economic booms but are highly vulnerable during recessions. They must continue paying for their expensive assets and staff even when demand plummets.
  * **High Variable Costs:** These businesses (e.g., consulting firms, freelance-based platforms, some retailers) are more agile. In a downturn, their costs naturally fall along with their revenues, making them more resilient. Their profit potential might be less explosive than a high-leverage company's, but their risk is often lower.
===== Finding the Clues =====
Companies don't publish a neat report titled "Our Cost Structure." As an investor, you need to do a bit of detective work, primarily by examining the [[Income Statement]].
  * **Cost of Goods Sold (COGS):** This line item is often a good proxy for variable costs, as it typically includes raw materials and direct labor.
  * **Selling, General & Administrative (SG&A):** This is usually a mix of both. Sales commissions are variable, while office rent and executive salaries are fixed.
  * **Read the Notes:** The footnotes in a company's annual report (Form 10-K) can provide invaluable details about the nature of its expenses.
By tracking these costs as a percentage of revenue over several years, you can see how the cost structure is evolving and make an educated guess about the ratio of fixed to variable costs. This simple analysis will give you a much deeper understanding of the business than just looking at the final net profit figure.