Why the numbers alone are not enough
In the last two guides you watched the four statements lock together into one story — profit flowing into equity, cash tying back to the balance sheet. But a statement line is brutally compressed. When a balance sheet prints inventory $80,000, that single figure is the end of a long chain of choices: which costing method, what was written down, what is obsolete and sitting in a warehouse nobody mentions. The number is true, but it is not the whole truth. The [[notes-to-financial-statements|notes to the financial statements]] — sometimes called the footnotes — are where that whole truth lives.
Here is the crucial point that surprises beginners: the notes are not an appendix or optional extra. They are *part of* the financial statements. The auditors examine them, the standards require them, and the law treats a number and its note as a single inseparable disclosure. When you read 'these statements should be read together with the accompanying notes,' that sentence is not boilerplate politeness — it is a literal instruction. A balance sheet without its notes is half a sentence.
The accounting policies note: the rulebook a company chose
Open almost any annual report and the very first note is the *summary of significant accounting policies*. Think of it as the company handing you its rulebook before the game starts. Standards like GAAP and IFRS leave many honest choices open, and this note says which ones the company picked: how it values inventory, over how many years it depreciates equipment, when it counts a sale as earned. Two companies can be equally truthful yet report different profit simply because they turned different dials here.
A concrete example makes the stakes clear. Suppose prices are rising and a company holds 1,000 identical units of stock. Under FIFO it counts the oldest, cheapest units as sold first, leaving newer expensive ones on the balance sheet — higher reported profit, higher inventory. Under LIFO it does the reverse — lower profit, lower inventory, but lower taxes. Same warehouse, same goods, two very different income statements. You cannot know which dial was turned unless you read the policies note. The number on the face of the statement is mute about how it was made.
Rising prices, 1,000 units. Oldest cost $6, newest cost $10.
FIFO LIFO
Cost of sales cheaper (low) dearer (high)
Reported profit HIGHER lower
Ending inventory newer (high) older (low)
Same goods. The policies note tells you which column you're reading.Risks with no number yet: contingencies and commitments
Some of the most important things about a company cannot be a line on the balance sheet at all, because nobody yet knows the amount. A [[contingent-liabilities|contingent liability]] is a potential obligation that depends on a future event — a lawsuit that might be lost, a guarantee that might be called, a tax dispute that might go badly. The accounting rule is honest about uncertainty: if a loss is *probable* and can be estimated, it is booked as a real liability; if it is only *possible*, it is disclosed in the notes but not yet in the numbers; if it is *remote*, it can be ignored.
This is exactly where a clean-looking balance sheet can be hiding a time bomb. A firm reporting healthy profit and modest debt might face a $50 million lawsuit that, if lost, would wipe out years of earnings — and you will find no trace of it among the numbers, only a paragraph in the notes. Commitments are the mirror image: binding promises to spend in the future, such as a signed ten-year lease or a contract to buy materials, that have not yet hit the books but absolutely shape the company's future cash. The reader who skips the notes never sees either of these.
Who, where, and what happened next: segments, related parties, subsequent events
A single profit figure can flatter a company by averaging away its weak spots, so larger firms must disclose segment information in the notes: a breakdown of revenue and profit by business line or by region. A conglomerate might report a glowing total while a note reveals that one thriving division is quietly subsidizing three that are bleeding. The same total number, two completely different futures — and only the segment note distinguishes them.
Related-party transactions are deals with people close to the company — its owners, directors, executives, or sister companies. These deserve a note of their own because they may not be at arm's length: a company that 'sells' goods to an entity its CEO owns, or rents its headquarters from the founder's family, might be moving profit around rather than earning it. The transaction can be perfectly legal and still mislead, which is why disclosure is required. When a chunk of a company's revenue comes from related parties, a skeptical reader treats that revenue as softer than it looks.
Finally, subsequent events are things that happen after the period closes but before the report is published — a fire that destroys a warehouse in January, a big acquisition signed in February, a major customer going bankrupt. The balance sheet is frozen as at December 31, yet some of these events are so important that hiding them would mislead, so they are disclosed in a note (and a few, if they reveal a condition that already existed at year-end, even change the numbers). It is the company's way of saying: 'here is the snapshot — and here is what you must know that the snapshot is already too old to show.'
Why sophisticated readers read the notes first
Put it all together and a pattern emerges: the face of the statements shows you a company at its tidiest, while the notes show you where the bodies are buried. The headline numbers are designed to be comparable and clean; the genuine risks and the genuine judgment calls are pushed into the prose. This is why an experienced analyst, an auditor, or a lender often reads the notes *before* the four tables — the notes tell them what kind of numbers they are about to look at, and what to distrust.
- Read the accounting policies note to learn which methods were chosen, so you know how the numbers were built before you trust them.
- Scan the contingencies and commitments notes for lawsuits, guarantees, and future obligations that the balance sheet cannot yet show.
- Check segment and related-party notes to see whether one good division is hiding weak ones, or whether revenue leans on insiders.
- Read the subsequent-events note last, to catch anything important that happened after the snapshot was frozen.
Two honest cautions before you go. First, the notes are bound by [[materiality|materiality]] — companies disclose what matters, not literally everything, so something small enough may legitimately never appear. Second, even the notes are partly the company's own words; the auditor's report vouches that the statements *and* their notes are fairly presented, but it does not promise that every optimistic phrasing is balanced. Read the notes closely, but read them as a careful skeptic, not as a believer. The numbers tell you what; the notes tell you whether you should believe the what.