How the three financial statements connect

Key takeaways

• The income statement and cash flow statement cover a period; the balance sheet is a snapshot at the start and end of that period.
• Net income is the first link: it closes into retained earnings on the balance sheet and is the starting line of the indirect cash flow statement.
• Ending cash on the cash flow statement must equal cash on the closing balance sheet; that tie is the proof the system is complete.
• Every change in a balance sheet line other than cash and retained earnings shows up somewhere on the cash flow statement, or in a disclosed non-cash transaction.
• A non-cash expense such as depreciation lowers net income but raises cash, by the amount of tax it saves.
• If a model's balance sheet does not balance, the error is almost always a balance sheet movement missing from the cash flow statement.

What each statement measures

The income statement, also called the profit and loss statement or P&L, measures performance over a period such as a quarter or a year. It starts with revenue, the value of goods and services delivered to customers, and subtracts the expenses incurred to earn that revenue. What remains is net income, the profit that belongs to the owners. It is prepared on the accrual basis, which means revenue and expenses are recorded when they are earned and incurred, not when cash changes hands.

The balance sheet measures position at a point in time. It lists assets (resources the company controls that are expected to produce future benefit), liabilities (obligations it owes to others) and equity (the residual claim of the owners). It always obeys the accounting equation: assets equal liabilities plus equity. Because it is a snapshot, a reporting period is bracketed by two balance sheets, an opening one and a closing one.

The cash flow statement measures the movement in cash over the same period as the income statement. It groups cash flows into three activities. Operating activities are the cash effects of running the business. Investing activities are the purchase and sale of long-lived assets and businesses. Financing activities are flows with lenders and shareholders: borrowing, repaying, issuing shares, buying them back and paying dividends.

The reason a company needs all three is that profit and cash are different things. A company can report a profit while running out of cash, because customers have not paid yet or because it is spending heavily on equipment. A company can also generate cash while reporting a loss, because a large non-cash charge sits in its expenses. The cash flow statement is the bridge that explains the gap.

Link one: net income and retained earnings

Net income is the first and most important connector. At the end of each period, the profit earned on the income statement is closed into retained earnings, an equity account on the balance sheet that accumulates all profits the company has kept rather than paid out. Dividends declared to shareholders reduce retained earnings. Dividends are a distribution of profit, not an expense, so they never appear on the income statement.

This roll forward is why the income statement is sometimes described as a detailed explanation of one line of the balance sheet. The change in retained earnings between two balance sheets is, apart from a few less common items, fully explained by net income and dividends.

The less common items are worth knowing. Some gains and losses bypass the income statement and go into accumulated other comprehensive income, a separate equity line, for example currency translation differences on foreign subsidiaries. Changes in accounting policy can adjust opening retained earnings directly. In a clean model, however, the roll forward below is the rule.

Link two: cash and the cash flow statement

The second connector is cash itself. The cash flow statement begins with the opening cash balance from the prior balance sheet, adds the net cash from operating, investing and financing activities, and arrives at an ending cash balance. That ending figure must equal the cash line on the closing balance sheet. If it does not, the statements are not complete.

Most companies prepare the operating section with the indirect method. It starts from net income, which is the same net income that closes into retained earnings, and then adjusts it back to cash. Two kinds of adjustment are needed. First, non-cash expenses such as depreciation are added back, because they reduced profit without using cash. Second, changes in working capital accounts are recognized, because an increase in receivables means revenue was booked but cash was not collected, while an increase in payables means an expense was booked but cash was not paid.

So net income appears twice in the system: once flowing into retained earnings, and once as the first line of the cash flow statement. That double role is what ties profit, cash and the balance sheet together.

The other links: fixed assets, working capital and debt

Beyond net income and cash, every other balance sheet line has its own roll forward, and each roll forward has a home on the cash flow statement. Property, plant and equipment (PP&E) rises with capital expenditure, which is an investing outflow, and falls with depreciation, which is an income statement expense added back in operating cash flow. Debt rises with borrowing and falls with repayment, both financing flows, while the interest on it is an income statement expense.

Working capital accounts link through the operating section. Accounts receivable rises when sales are made on credit and falls when customers pay. Inventory rises when goods are bought and falls when they are sold, at which point the cost moves to cost of goods sold on the income statement. Accounts payable rises when the company buys on credit and falls when it pays suppliers.

Equity accounts other than retained earnings link through financing. Issuing new shares increases common stock and additional paid-in capital and brings in cash. Repurchasing shares creates treasury stock, a negative equity balance, and uses cash.

The practical test is simple. For each balance sheet line, you should be able to write its roll forward and point to the line on the income statement or cash flow statement that explains each movement. A line that changes with no explanation is where a model breaks.

A full year for Harbor Industrial

Harbor Industrial is a hypothetical manufacturer. All figures are in $m. At the end of Year 0 it holds 50 of cash, 80 of receivables, 60 of inventory and 300 of net PP&E, for total assets of 490. It owes suppliers 40, has 20 of accrued liabilities (expenses incurred but not yet paid, such as wages and utilities) and carries 200 of debt. Equity is 100 of contributed capital and 130 of retained earnings. Liabilities of 260 plus equity of 230 equal 490, so the opening balance sheet balances.

During Year 1 the company sells 1,000 of product, incurs 600 of cost of goods sold, 180 of selling, general and administrative expense and 40 of depreciation. It pays 12 of interest and tax at 25 percent. It spends 70 on new equipment, borrows 50 of new debt, repays 20 of old debt and pays 26 of dividends. By year end, receivables have grown to 95, inventory to 70, payables to 50 and accrued liabilities to 24.

The three steps below build the income statement, then the cash flow statement, then the closing balance sheet. Notice that nothing on the closing balance sheet is a plug: every line is a roll forward of the opening balance using figures from the other two statements.

One transaction, three statements

The fastest way to internalize the links is to push a single transaction through the system and confirm the balance sheet still balances. Three transactions cover most of the mechanics: a purchase on credit that touches only the balance sheet, a non-cash expense that touches all three statements, and a financing event that starts on the balance sheet and later reaches the income statement through interest.

Each example below is stated in isolation, with a 25 percent tax rate, and assumes any tax effect is settled in cash in the same period. In practice, taxes are often accrued and paid later, which would move a tax payable line instead of cash, but the balance sheet would balance either way.

Using the links to check a model

In practice the links are a diagnostic tool. A financial model that projects five years of statements is correct only if, in every year, ending cash on the cash flow statement equals cash on the balance sheet and total assets equal total liabilities plus equity. Most modelers add a check row that shows the difference, which should read zero in every column.

When the check fails, the difference is a clue. If the balance sheet is out by exactly the amount of one line item, that item is usually on the balance sheet but missing from the cash flow statement, or included twice. If the error is equal to twice a number, the sign on that number is probably flipped. If the difference grows each year, a roll forward is linked to the wrong prior period.

The links also discipline forecasting judgments. An analyst who projects rising revenue but flat receivables is implicitly assuming customers pay faster every year. An analyst who projects falling capex but rising PP&E has built something impossible. Forcing every assumption through all three statements makes those inconsistencies visible.

Where the links are less tidy in real filings

Reported financial statements rarely reconcile as neatly as a model, and a practitioner should know why before assuming an error. Acquisitions are the most common reason. When a company buys another business, the receivables, inventory and payables it acquires appear on the closing balance sheet, but the cash paid shows up as a single investing outflow. The working capital changes in the operating section therefore will not equal the simple difference between two balance sheets.

Foreign currency is the second reason. A subsidiary's balances are translated at period-end exchange rates, so balance sheet lines move with currency even when nothing operational happened. The cash flow statement shows a separate line for the effect of exchange rate changes on cash. Non-cash investing and financing transactions are the third: equipment acquired under a lease, or debt converted into shares, changes the balance sheet without any cash flow and is disclosed in a supplemental note.

Terminology also varies. Under IFRS, the balance sheet is usually called the statement of financial position, the income statement the statement of profit or loss, and retained earnings may be labeled accumulated profits or reserves. The links are identical under US GAAP and IFRS. What differs is some classification on the cash flow statement, covered in the topic on reading that statement.