Accounting
The Cash Flow Statement
A summary of how cash actually moved in and out of a business over a period — separate from the income statement's profit figure, because profit and cash aren't the same thing.
Definition
The cash flow statement tracks how much actual cash moved into and out of a business over a period of time, split into three categories: cash from operating activities (the core, everyday business), investing activities (buying or selling long-term assets like equipment), and financing activities(borrowing, repaying debt, or money moving to or from owners). Together, these explain exactly why the business's cash balance changed from the start of the period to the end.
Why this exists
The income statement measures profit on an accrual basis — revenue and expenses assigned to the period they happened in, not to when cash moved. That's useful for measuring how the business actually performed, but it means net income can diverge substantially from how much actual cash the business has. A business can report a healthy profit while its cash balance shrinks, if its customers haven't paid yet, or if it's spending heavily on new equipment, or paying down debt.
This gap matters because a business ultimately has to pay its bills, its employees, and its debts in actual cash, not in accounting profit. A business can be consistently profitable on its income statement and still fail if it runs out of cash to meet those real, immediate obligations — a problem profit alone doesn't reveal. The cash flow statement exists to answer a more literal question than the income statement: where did the business's cash actually come from, and where did it actually go, this period?
It splits that movement into three sources because they mean very different things for a business's health. Cash from operating activities reflects the core business actually generating (or consuming) cash day to day — the number most worth watching closely. Cash from investing activities reflects money spent on, or received from selling, long-term assets like equipment — often negative for a growing business, which isn't necessarily bad. Cash from financing activities reflects borrowing or repaying debt, or money moving to or from owners — a business raising cash by taking on debt looks very different from one generating cash by shrinking, even if the total cash-flow number looks similar.
Formula & mechanics
The three categories, added together:
Cash from Operating Activities + Cash from Investing Activities + Cash from Financing Activities = Net change in cash
Worked example
Maria's bakery, one year:
Operating: Net income was $3,000, but $1,000 of that was still
owed by customers who hadn't paid by year end.
Cash from operations: +$2,000
Investing: Bought a new mixer for the bakery.
Cash from investing: −$2,000
Financing: Paid down $1,000 of the bank loan.
Cash from financing: −$1,000
Net change in cash: −$1,000Even though Maria's bakery was profitable — $3,000 in net income on the income statement — its actual cash balance dropped by $1,000 that year, because of unpaid customer bills, a new equipment purchase, and loan repayment. Profit and cash moved in opposite directions in the same period.
Try it yourself
Net change in cash
-$1,000.00
Starting cash
$5,000.00
Ending cash
$4,000.00
How the math works
Operating: $2,000.00 Investing: -$2,000.00 Financing: -$1,000.00 Net change in cash: -$1,000.00 Starting cash $5,000.00 + net change -$1,000.00 = ending cash $4,000.00
A negative total here doesn't automatically mean trouble — it matters which category it's coming from. Negative investing cash flow often just means the business is growing (buying equipment); a negative from operating activities is the more serious warning sign, since that's the core business itself consuming cash rather than generating it.
Common misconceptions
“A profitable business (positive net income) always has growing cash.”
Profit and the change in cash are different numbers and can move in opposite directions in the same period, exactly as in the worked example above.
“Negative cash flow always means a business is in trouble.”
Negative cash from investing activities often just means a business is growing — buying equipment, expanding. It's worth checking which category the negative cash is coming from: a negative from core operating activities is a much bigger warning sign than a negative from investing in growth.
“The cash flow statement and the income statement measure the same thing, just presented differently.”
They measure genuinely different things — the income statement measures accrual-based profit, the cash flow statement measures actual cash movement — and the two numbers regularly diverge, sometimes significantly.
Also in the Glossary: Cash Flow Statement, Financing Activities, Investing Activities, Operating Activities