Cash Conversion Ratio (OCF / NI)

The simplest, most powerful metric for earnings quality assessment is also the one most investors ignore: cash conversion ratio. It answers a single, brutal question: Of the net income a company reports, how much actually converts to operating cash flow? A company that reports $100 million in net income but generates $95 million in operating cash flow has high-quality, cash-backed earnings. The same company generating only $50 million in cash has fragile, accrual-dependent earnings that may not repeat. This single ratio—operating cash flow divided by net income—separates the wheat from the chaff in earnings quality analysis more reliably than any other metric.

Quick definition: The cash conversion ratio is operating cash flow (OCF) divided by net income (NI). A ratio of 0.95 or higher (95%) indicates that nearly all reported earnings convert to cash, signaling high-quality earnings. A ratio below 0.70 (70%) indicates that the majority of reported earnings are non-cash accruals, signaling low-quality, fragile earnings.

Key Takeaways

1. Cash conversion > 90% is excellent: These companies are unlikely to surprise with major reversals, restatements, or cash flow misses. Earnings are real and likely repeatable.
2. Cash conversion 70–90% is acceptable: Normal for many industries. Timing differences between cash collection and revenue recognition are expected. Monitor the trend; if declining, investigate.
3. Cash conversion < 70% is a red flag: Companies with low conversion are likely managing earnings through accruals, struggling with receivables collection, or facing demand weakness masked by revenue recognition timing.
4. Negative cash conversion is a warning: If OCF is negative while NI is positive, the company is not generating cash from operations. It's burning cash and using accounting tricks to report profit. Avoid.
5. The ratio is industry-dependent: Capital-intensive businesses (utilities, infrastructure) naturally have lower conversion due to non-cash depreciation add-backs. SaaS companies with upfront cash collections often have conversion > 100%. Compare within industry.
6. Trend matters as much as level: A company with 85% conversion declining to 75% is more concerning than one steady at 75%. A company climbing from 70% to 85% is improving, even if still below best-in-class.

How to Calculate and Interpret

Calculation: Cash Conversion Ratio = Operating Cash Flow ÷ Net Income

Getting the numbers:

• Operating Cash Flow: Line item on the cash flow statement, often labeled "Cash from Operations" or "Operating Activities."
• Net Income: Bottom line on the income statement.

Example calculation (Apple, FY 2023):

• Operating Cash Flow: $110.5 billion
• Net Income: $96.9 billion
• Cash Conversion Ratio = 110.5 ÷ 96.9 = 1.14 (114%)

Apple generates $1.14 in cash for every $1 of net income—exceptional quality.

Example calculation (a struggling software company, FY 2023):

• Operating Cash Flow: $45 million
• Net Income: $120 million
• Cash Conversion Ratio = 45 ÷ 120 = 0.375 (37.5%)

This company reports $120 million in profit but generates only $37.50 in cash per dollar of earnings. The $75 million gap is non-cash accruals (or negative cash from working capital changes). Earnings are fragile and likely to disappoint.

Why the Ratio Exists: The Accruals Bridge

The gap between net income and operating cash flow is the accruals gap—the difference between GAAP accrual accounting and economic cash generation. Non-cash adjustments include:

Non-cash expenses (added back):

• Depreciation and amortization
• Stock-based compensation
• Deferred taxes
• Impairments and write-downs

Working capital changes (subtracted):

• Increase in accounts receivable (customer owes you money—accrual but no cash yet)
• Increase in inventory (product sitting in warehouse—expense recognized but not sold yet)
• Decrease in accounts payable (you paid suppliers faster—cash out but not yet expensed)
• Decrease in deferred revenue (you got paid upfront but service not yet delivered—cash in but revenue not yet recognized)

When a company's working capital grows faster than its revenue, the cash conversion ratio declines. When working capital shrinks (collecting receivables, selling inventory, delaying payables), cash conversion improves.

Industry Variations: Why You Can't Compare Apples to Oranges

Different industries naturally have different cash conversion ratios due to their operating models. Comparing ratios across industries without context is a mistake.

High cash conversion industries (typically > 90%):

• Retailers (cash and credit card sales collected at point of sale)
• Insurance (premiums collected upfront; claims paid later)
• Software with annual upfront billing
• Fast-food franchises (immediate cash collection)

Moderate cash conversion industries (typically 70–90%):

• Manufacturing (products sold on credit; receivables take 45–90 days to collect)
• Industrial distribution (similar credit terms)
• Professional services (contracts with milestone billing)

Lower cash conversion industries (can be 60–85% even when healthy):

• Utilities (regulatory depreciation add-backs inflate non-cash charges)
• Capital-intensive infrastructure
• Real estate (large non-cash charges and long-term contract recognition)

Higher than 100% cash conversion (favorable):

• SaaS and subscription businesses (cash received upfront; revenue recognized over months)
• Retailers with payables longer than receivables (collect from customers, pay suppliers later)

When comparing two companies' cash conversion ratios, always compare within industry. A software company with 105% conversion is healthy; a manufacturing company with 105% would be unusually favorable. A manufacturer with 75% conversion is normal; a retailer with 75% would be weak.

Reading the Trend: Stable, Rising, or Declining?

The absolute level of cash conversion matters, but the trend is equally important.

Stable ratio: A company with consistent 80% conversion year after year shows predictable accruals behavior and reliable earnings quality. If working capital needs are stable (payables scale with revenue, receivables stay in line), the company's cash generation is predictable.

Rising ratio: A company improving from 75% to 85% to 90% over three years is tightening its accruals profile. Possible causes:

• Better receivables collection (credit policy tightened or customer quality improved)
• Inventory management improved (just-in-time supply chain, lower holding)
• Faster supplier payment cycles becoming less favorable (but improving cash conversion)
• Shift in business mix toward less working-capital-intensive revenue

A rising trend is positive and suggests the company is becoming more efficient.

Declining ratio: A company dropping from 85% to 75% to 60% over three years is concerning. Possible causes:

• Receivables ballooning (extended payment terms to win sales; weakening customer credit quality)
• Inventory building faster than sales (demand weakness or poor inventory management)
• Deferred revenue declining relative to new revenue (negative indicator for SaaS companies)
• Major change in business mix toward higher-touch, lower-cash-conversion revenue streams

A declining trend is a red flag and should trigger investigation into working capital and revenue quality.

Real-World Examples

Microsoft: Excellent and stable conversion Microsoft's cash conversion ratio has consistently been 100%+ for the past decade. The company reports net income of ~$70–80 billion and generates operating cash flow of $75–90 billion. Why? The SaaS and subscription model (Microsoft 365, Azure) collects cash upfront while recognizing revenue monthly or quarterly. The cloud business also benefits from minimal receivables and relatively low working capital requirements. The high, stable conversion ratio reflects a business model engineered for cash generation.

Intel: Declining conversion signals trouble Intel's cash conversion ratio declined sharply from 2018 to 2022. In 2018, it was ~90%. By 2021–2022, it had fallen to 65–75%. The decline reflected massive capital expenditures (non-operating) and deteriorating inventory management as demand forecasts proved overly optimistic. The ratio decline was an early warning that reported earnings weren't reflecting operational reality. Investors who noticed the deteriorating conversion could have exited before the 60% stock price decline that followed.

Tesla: High but volatile conversion Tesla's cash conversion ratio has historically been volatile, ranging from 80% to 110%, depending on the year. In high-demand years with strong cash collection, it approaches 110%. In years with working capital buildups (inventory accumulation, deferred revenue swings), it drops to 80–90%. The company's conversion is acceptable because it's high by manufacturing standards but warrants close monitoring of the trend.

Berkshire Hathaway: Complex due to insurance float Berkshire's cash conversion ratio is difficult to interpret in a traditional sense because the insurance business operates differently than manufacturing or retail. Insurance companies collect premiums upfront (inflating operating cash flow) but may not incur claim expenses until months later. Looking at Berkshire's reported OCF / NI ratio without understanding the insurance dynamics would mislead. This is why always reading the business model and operating structure is critical.

Amazon: Conversion often > 100% Amazon famously had operating cash flow exceeding net income for nearly 15 years. Why? The company collected payment from customers quickly, maintained minimal accounts receivable, and paid suppliers on longer terms. Deferred revenue from gift cards and AWS prepayments further inflated cash flow. Conversions of 110–150% were normal for Amazon. Investors who misread this, thinking Amazon's low reported earnings (due to massive capex and R&D) meant poor quality, missed the opportunity. Cash conversion above 100% is favorable when driven by favorable working capital, not by unsustainable reductions in other metrics.

Cash Conversion as an Earnings Warning System

Cash conversion ratios that suddenly deteriorate are often leading indicators of earnings trouble. Here's why: earnings are reported using accrual accounting (revenue when earned, expenses when incurred). Cash flow is objective—it's actual money in or out. If a company's reported earnings are growing but its cash conversion is declining, the company is increasingly relying on accruals (promises of future cash) rather than actual cash to support its reported profits.

Example: A sales-driven company with channel stuffing

• Year 1: NI = $100M, OCF = $95M, conversion = 95%
• Year 2: NI = $130M, OCF = $90M, conversion = 69%

Earnings grew 30% but cash flow fell. What happened? The company likely pushed products into distributors (channel stuffing), recognizing revenue at shipment but not collecting cash. The $40M gap ($130M NI vs $90M OCF) represents inflated receivables—promises of cash that may not materialize. In Year 3, when distributors return unsold inventory or demand normalizes, earnings will reverse downward. An investor monitoring cash conversion would have caught this early.

Example: A company with deteriorating receivables

• Year 1: NI = $50M, OCF = $48M, conversion = 96%, DSO = 35 days
• Year 2: NI = $60M, OCF = $42M, conversion = 70%, DSO = 55 days

Earnings grew 20%, but conversion fell from 96% to 70%. Days sales outstanding (DSO) jumped from 35 to 55 days. The company is offering longer payment terms to boost sales, but cash isn't following. This is unsustainable. Either the company will have to normalize terms (hurting growth) or will eventually take a large allowance for doubtful accounts (hurting earnings). The cash conversion decline would have flagged this issue.

Using Cash Conversion in Valuation

Cash conversion should directly influence the multiple you're willing to pay.

Standard framework:

• Company A: NI = $100M, OCF = $95M, conversion = 95%, growth = 10%, P/E = 20x
• Company B: NI = $100M, OCF = $65M, conversion = 65%, growth = 10%, P/E = 20x

Are they equally attractive? No. Company A's earnings are cash-backed and likely repeatable. Company B's earnings are mostly accruals and likely to surprise lower or reverse. A fair valuation might be:

• Company A: 20x earnings (justified by quality)
• Company B: 14x earnings (discount for quality risk)

The difference between 20x and 14x reflects the conversion difference. If both trade at 20x, Company B is a value trap. If Company B trades at 14x or less, it might be fairly valued given the quality risk.

Calculating Multi-Year Averages

A single year's cash conversion can be distorted by working capital swings. Calculate 3–5 year averages for a clearer picture.

Example:

• Year 1: 88%
• Year 2: 75%
• Year 3: 92%
• Year 4: 85%
• Year 5: 78%

Average: 83.6%

The average of 83.6% is more representative than any single year. A company with an 80–85% average conversion has moderate quality. If you see a recent year's conversion drop sharply below the average (e.g., Year 5 at 78% vs. a 85% average), investigate why.

Common Mistakes

Mistake 1: Ignoring negative cash conversion If OCF is negative (company is burning cash) while NI is positive (company reports profit), the company is not actually profitable. It's borrowing, selling assets, or tapping retained earnings to fund operations while using accruals to mask deterioration. This is the most dangerous scenario. Avoid companies with negative operating cash flow and positive earnings.

Mistake 2: Comparing across industries without adjusting for model A software company with 120% conversion and a capital-intensive utility with 75% conversion are not comparable on this metric alone. Always adjust for the industry and operating model.

Mistake 3: Overlooking depreciation in non-cash add-backs Depreciation is a non-cash expense that gets added back to net income to calculate operating cash flow. Companies with high depreciation (old assets, accelerated schedules) will naturally have higher cash conversion ratios. This is not necessarily a quality signal; it's just a function of asset base and depreciation policy. Compare companies with similar asset bases and depreciation methods.

Mistake 4: Mistaking high conversion (>100%) for easy opportunity A company with 120% cash conversion (OCF > NI) is not automatically cheap or undervalued. It simply means the business model is converting accruals to cash efficiently. Make sure the high conversion is sustainable (favorable working capital, strong collection, not unsustainable cost-cutting).

Mistake 5: Failing to investigate the source of the ratio A 65% cash conversion could be driven by:

• Weak receivables collection (concerning)
• High inventory buildup (concerning if demand is weak)
• Declining deferred revenue (concerning for SaaS)
• Required working capital for growth (less concerning if temporary)
• Seasonal working capital swings (not concerning if cyclical)

The source of the low conversion matters. Don't just look at the ratio; understand why it is what it is.

FAQ

What's a "healthy" cash conversion ratio for a mature company? For a mature, stable company, 85–100% is healthy. Below 80% warrants investigation. Above 100% suggests favorable working capital dynamics but should also be investigated to ensure sustainability. Industry matters, so compare to peers.

Can a company have negative OCF and still be investable? Only if it's temporarily negative due to required growth investments (working capital buildup during hypergrowth, capex for expansion). For a mature or declining company, negative OCF and positive NI is a red flag that signals accounting manipulation.

How do I know if a declining cash conversion ratio is a red flag or a normal cycle? Look at the source. If receivables are growing faster than sales, it's a red flag. If inventory is building but sales are growing even faster, it could be normal preparation for future demand. If payables are shrinking, the company is paying suppliers faster (concerning). If deferred revenue is declining (for SaaS), it's a red flag. Investigate the working capital statement line by line.

Does a company with 110% conversion deserve a valuation premium? Only if the conversion is sustainable and driven by favorable working capital (not unsustainable cost-cutting or one-time events). A SaaS company with upfront billing naturally has >100% conversion. A manufacturer with 110% conversion should raise questions: Is it accelerating receivables collection unsustainably? Has it extended payables beyond industry norms?

How does stock-based compensation affect the ratio? Stock-based compensation is an expense against net income but is added back (as a non-cash charge) in calculating operating cash flow. A company with high stock-based compensation will have higher apparent cash conversion relative to net income. This is technically correct but can mask true economic earnings. Adjust by subtracting estimated stock-based dilution from net income if you want to see "true" earnings quality.

Should I use free cash flow instead of operating cash flow? No. Free cash flow = OCF – capex. You want to separate the quality of operating earnings (OCF / NI) from the capital intensity of the business (capex). A company can have excellent operating cash conversion but low free cash flow if it's capital-intensive. Don't conflate the two.

What if a company's OCF is higher than its NI for years? This is common for SaaS, software, and subscription businesses with upfront cash collections, and for companies like Berkshire Hathaway with insurance float. It's not inherently concerning; it's a feature of the business model. However, it should be investigated to ensure the high conversion is sustainable (not from one-time asset sales or unsustainable working capital reductions).

Related Concepts

• What is earnings quality? (article 01) — The overarching framework that positions cash conversion as the cornerstone metric.
• Accrual vs. cash earnings (article 02) — The detailed explanation of how accruals create the gap the ratio measures.
• Quality of earnings score (article 03) — A systematic framework that weights cash conversion at 35% importance.
• Revenue quality tests (article 05) — Deep forensic analysis of the top line, which drives much of the cash conversion gap.
• Working capital efficiency (Chapter 07, article 11) — Related concept that examines inventory, receivables, and payables in detail.

Summary

The cash conversion ratio—operating cash flow divided by net income—is the single most powerful and simplest metric for assessing earnings quality. A ratio above 90% indicates high-quality, cash-backed earnings that are likely repeatable. A ratio of 70–90% is acceptable for most industries but warrants monitoring. Below 70% is a red flag that earnings are fragile, accrual-dependent, and at risk of reversal.

The ratio varies by industry, so compare within peer groups. Track the trend over 3–5 years; a declining ratio is more concerning than a low absolute level if the low level is stable. Use the ratio as an early warning system: when earnings growth outpaces cash flow growth and conversion deteriorates, earnings trouble usually follows.

Next

Tests of revenue quality digs into the top line—how to forensically analyze revenue recognition policies and spot signs of aggressive or unsustainable practices.