Loss ratio measures the proportion of a fund’s invested capital that is permanently impaired through write-downs or write-offs. It is calculated by dividing the capital invested in losing deals by the total capital deployed across the portfolio. A 15% loss ratio means that for every dollar the fund invested, 15 cents went to deals that lost money.
Why Loss Ratio Matters
Every fund portfolio has losses. The question is how many and how severe. Loss ratio provides a direct measure of downside management, which is one of the most important and least glamorous aspects of fund management.
For limited partners evaluating a general partner’s track record, loss ratio reveals risk management discipline. Two funds can show identical IRR and MOIC while having very different loss profiles. A fund that achieves 2.5x MOIC with a 5% loss ratio is demonstrating broad-based value creation. A fund that achieves the same 2.5x with a 30% loss ratio is relying on a few outsized winners to compensate for significant capital destruction elsewhere.
Loss Ratios by Strategy
Different strategies carry fundamentally different loss expectations:
Buyout. Control investments in established companies with revenue, margins, and operational infrastructure. Loss ratios typically fall below 10-15% of invested capital. GPs that consistently stay below this range demonstrate strong deal selection and portfolio management. Losses in buyout often stem from secular industry shifts, overleveraged capital structures, or management execution failures.
Growth equity. Companies are past the startup phase but still scaling. Loss ratios generally run 10-20%. The risk profile sits between buyout and venture.
Venture capital. Early-stage investing inherently involves high failure rates. Loss ratios of 40-60% are common and expected. The economic model depends on a small number of investments generating 10x+ returns to more than offset the many zeros and partial losses. A VC fund with a 10% loss ratio is likely not taking enough risk.
Analyzing Loss Ratio in Context
Raw loss ratio alone is insufficient. Practitioners evaluate it alongside several dimensions:
Timing of losses. Early write-offs may indicate poor deal selection but allow capital recycling. Late-stage write-downs after years of positive marks raise more serious questions about valuation discipline and monitoring.
Concentration of losses. Losses spread across many small positions are a different story from a single large write-off that impairs the entire fund. A concentrated loss can be the difference between a top-quartile and bottom-quartile outcome.
Recovery value. Not all losses are binary. A deal that returns 0.3x is very different from a complete write-off. Some GPs report loss ratio only on total write-offs, while others include any deal below 1.0x. Understanding the definition is essential.
Correlation with winners. In venture capital, high loss ratios are acceptable if winners are sufficiently large. The fund-level money multiple is what ultimately matters, and the power law distribution of returns means a single 50x exit can overwhelm dozens of zeros.
Loss Ratio in Due Diligence
When evaluating a GP’s track record, limited partners typically ask for a deal-by-deal attribution showing entry cost, current or exit value, and MOIC for each investment. From this data, they calculate loss ratio and examine the distribution of outcomes.
GPs should be prepared to explain every loss: what went wrong, what was learned, and how the investment process evolved as a result. A GP that has never had a loss is either early in their career or not being transparent. The mark of a strong manager is not zero losses but a low loss ratio combined with strong realized gains on winners and a clear narrative of continuous improvement.
Frequently Asked Questions
What is a typical loss ratio in private equity?
Loss ratios vary significantly by strategy. Buyout funds typically target loss ratios below 10-15% of invested capital, reflecting their focus on established businesses with stable cash flows. Venture capital funds commonly see 40-60% of portfolio companies fail to return capital, which is expected given the high-risk, high-reward nature of early-stage investing.
How is loss ratio calculated?
Loss ratio equals the total capital invested in deals that generated a loss (proceeds below cost basis) divided by the total capital invested across the entire fund. Some calculations use a strict write-off definition (total loss), while others include any deal that returned less than 1.0x cost basis. The methodology should be specified when reporting.
Does a low loss ratio mean a fund is good?
Not necessarily. In venture capital, an extremely low loss ratio might indicate the GP is not taking enough risk and may be missing breakout opportunities. In buyout, a low loss ratio paired with modest overall returns could mean the GP is playing it safe but not creating significant value. Loss ratio must be evaluated alongside total fund returns, MOIC, and IRR.
