How to Actually Compare Two Companies' Financial Statements

When you put two companies' income statements next to each other and look at the raw dollar figures, it might seem like you're doing real analysis. But most of the time, you're not. A large company will usually have higher numbers than a small one. That doesn't really tell you which business is doing better. The solution is to normalize the data: focus on margins and ratios, like gross margin %, revenue growth %, and return on equity. Percentages help control for size in ways that raw dollar figures can't.

Besides size, there are a few other important factors to consider that many people overlook. Fiscal year-ends can vary between companies. One company's "Q1" might run from January to March, while another's could cover a completely different three months. So just looking at labels can be misleading without checking the actual date ranges. Also, accounting policy choices, even if they fit within GAAP, can lead to significant differences. For example, using FIFO versus LIFO for inventory can result in notably different reported costs during inflation. LIFO assumes you sell the most recently purchased, often more expensive, inventory first.