Free Cash Flow (FCF)

What is Free Cash Flow?

Free Cash Flow represents the actual cash your business generates after paying for operations and maintaining or expanding your asset base. It is the cash available for strategic decisions: paying down debt, buying back shares, making acquisitions, or building a war chest.

Why FCF Matters for Founders

Profit is an opinion. Cash is a fact. A SaaS company can show accounting profits while burning cash due to timing differences in revenue recognition and collections. FCF cuts through accounting complexity to show real liquidity generation.

For ecommerce founders, FCF reveals whether your profitable P&L actually translates to cash in the bank. Heavy inventory investments can create positive net income but negative FCF, a dangerous mismatch.

How to Calculate Free Cash Flow Step by Step

Step 1: Find your Operating Cash Flow. This is on your cash flow statement. If you don't have a formal cash flow statement, calculate it: Net Income + non-cash charges (depreciation, amortization) +/- changes in working capital.

• Net Income: $180,000
• Depreciation & Amortization: $45,000
• Increase in accounts receivable: -$30,000 (cash tied up in receivables)
• Increase in accounts payable: +$15,000 (you owe more to vendors)
• Operating Cash Flow = $180K + $45K - $30K + $15K = $210,000

Step 2: Subtract Capital Expenditures (CapEx). These are purchases of long-term assets: servers, equipment, office buildout, capitalized software development.

• CapEx: $35,000

Step 3: Calculate FCF.

• FCF = $210,000 - $35,000 = $175,000

Your business generated $175K in actual spendable cash this period. That's the real number, not the $180K net income that includes non-cash items and ignores capital investments.

Step 4: Calculate FCF Margin.

• Revenue: $2,500,000
• FCF Margin = $175K ÷ $2.5M = 7%

Step 5: Track FCF trend quarterly. FCF can be lumpy (big equipment purchases, annual payments), so a rolling 4-quarter average gives a better picture.

Common mistakes founders make:

• Confusing operating cash flow with free cash flow (FCF subtracts CapEx)
• Ignoring working capital changes (fast-growing companies often have negative FCF despite profits because receivables and inventory grow)
• Not capitalizing software development costs consistently (affects both net income and CapEx)
• Using FCF from a single quarter to project annual FCF (seasonality and one-time items distort)

FCF vs Net Income

Net income includes non-cash items like depreciation and excludes capital expenditures. FCF shows actual cash movement. Companies can have positive net income and negative FCF for years, eventually running out of money despite being profitable on paper. Use a pro forma income statement generator to project both net income and cash flow impacts of your growth plans.

Further Reading

Cash Flow vs. Profitability: The Startup Founder's Survival Guide