Cash Flow: Types & How to Calculate It

What Is Cash Flow?

Cash flow is the net movement of money into and out of a business over a set period. It measures when cash actually lands in the bank and when it leaves, not when revenue is recognized on paper. Positive cash flow means the company collected more than it spent.

How Cash Flow Works

Every dollar that moves through a company lands in one of three buckets on the cash flow statement. Operating activities cover cash produced or consumed by running the business: customer collections, payroll, rent, software, commissions. Investing activities cover purchases and sales of long-lived assets, capitalized software, and acquisitions. Financing activities cover money raised from or returned to investors and lenders, including equity rounds, venture debt draws, and principal repayments.

Start with the opening cash balance, add the three buckets, and you land on the closing balance. Because it ties to the bank, the cash flow statement is the hardest of the three financial statements to dress up.

Cash Flow in Plain English

Cash flow is whether more money came in than went out. Profit is an opinion shaped by accounting policy. Cash is a fact you can check against a bank statement. A company can book a record quarter, report a healthy margin, and still miss payroll because the customer who signed in March does not pay until June. Cash flow tells you what you can actually spend.

Operating Cash Flow, Free Cash Flow, and the Cash Flow Statement

Operating cash flow starts at net income, adds back non-cash charges such as depreciation, amortization, and stock compensation, then adjusts for changes in working capital. If receivables grow faster than collections, operating cash flow falls below net income even when the income statement looks strong. Free cash flow takes operating cash flow and subtracts capital expenditure. It is the number lenders and investors weigh most heavily, because it represents cash genuinely available to repay debt, fund acquisitions, or return to shareholders.

The gap between the two lines matters. A software business with minimal capital expenditure sees the two converge, while a company capitalizing large amounts of engineering cost does not.

Why Does Cash Flow Matter More Than Profit?

Liquidity, not profitability, decides whether a company survives the next ninety days. Cash flow drives three decisions a finance leader makes constantly: how much runway remains at the current burn rate, whether growth can be funded internally, and how large a raise actually needs to be. Burn rate is simply negative operating cash flow expressed monthly. Divide the cash balance by that number and you have runway in months.

Lenders read the same statement. Debt service coverage, borrowing capacity, and covenant headroom are computed from cash flow, not from bookings. A board deck full of ARR growth will not open a credit facility if the business consumes capital faster than it converts contracts into collections.

Cash Flow in SaaS: Working Capital and the Cash Conversion Cycle

Subscription businesses carry a structural timing problem. Acquisition cost is paid in full at the moment of sale through commission, ad spend, and onboarding labor, while revenue arrives in twelfths. A customer with a 24 month payback period consumes cash for two years before contributing any.

Working capital is the buffer that absorbs the mismatch, and the cash conversion cycle measures how long each dollar stays trapped inside it. In SaaS that cycle is dominated by days sales outstanding: the days between invoicing a customer and clearing their payment. Annual prepay compresses the cycle, monthly billing on net 60 terms stretches it, and the difference between the two is often larger than any expense line a finance team could realistically cut.

How to Improve Cash Flow Without Raising Equity

The first levers are billing terms and collections discipline. Bill annually where the buyer will accept it, invoice on signature rather than at month end, and run a structured dunning process so past due invoices get chased on a schedule. Tightening days sales outstanding from 55 days to 35 days at a business collecting $20 million a year frees roughly $1.1 million in cash without adding a single customer.

Beyond that sit financing structures that pull future cash forward. Factoring advances against invoices, revenue-based financing advances against recurring revenue, and venture debt lends against the equity story. Each trades a cost of capital for timing. The real question is not whether cash is expensive, but whether the growth it funds returns more.

Cash Flow and the Closing Motion

Cash flow is where the Closing Motion earns its keep. Most B2B teams treat the close as a signature and then wait, so a signed contract becomes a receivable, the receivable becomes a collections problem, and the cash lands months after the revenue was booked. Ratio compresses that gap. Ratio Trade lets the buyer pay monthly or quarterly while the seller collects the full total contract value upfront, which moves cash into the operating column at the moment of yes rather than across the following year. Ratio Boost converts existing recurring contracts into upfront capital, non-dilutive and without warrants. Propose, Close, Collect, and Renew stay connected, so the forecast and the bank balance finally describe the same business.

Common Questions About Cash Flow

What is the difference between cash flow and profit?

Profit is measured under accrual accounting, which recognizes revenue when it is earned and expenses when they are incurred. Cash flow tracks the actual timing of money moving. A profitable company can still run out of cash when customers pay slowly or costs land ahead of collections.

Is negative cash flow always a problem?

No. Negative investing cash flow usually means the company is building capacity, and a fast-growing business often runs negative operating cash flow on purpose because it funds acquisition ahead of revenue. It becomes a problem when the burn rate outpaces runway or when there is no credible path to positive free cash flow.

How often should a company forecast cash flow?

Weekly for the next thirteen weeks, and monthly for the next twelve to eighteen months. The thirteen week view catches payroll and vendor timing risk, while the longer view drives hiring and fundraising decisions. Rebuild both against actual bank balances, not against the plan.

Cash Flow