IRR vs. MOIC
MOIC tells you 'how much did I make?' and IRR tells you 'how fast did I make it?' A 3.0x over 7 years (~17% IRR) sounds great, but a 2.0x over 3 years (~26% IRR) may be better because you can reinvest sooner.
Definition
IRR (Internal Rate of Return) and MOIC (Multiple on Invested Capital) are the two primary metrics used to evaluate private equity investment returns. MOIC measures the absolute size of the return (how many times you got your money back), while IRR measures the annualized time-weighted return (how quickly you got your money back). A deal can have a high MOIC but low IRR if the holding period is long, or vice versa.
Formula
MOIC = Total Value / Invested Capital IRR = discount rate r such that: sum of CF_t / (1+r)^t = 0
MOIC
Total proceeds divided by total equity invested; ignores time
IRR
Annualized return rate that sets NPV of all cash flows to zero; time-weighted
IRR vs. MOIC: Time Matters
Higher MOIC doesn't always mean higher IRR
Deal A
3x
MOIC
~17%
IRR
Deal B
2x
MOIC
~26%
IRR
Deal C
4x
MOIC
~15%
IRR
Key insight: Deal B has the lowest MOIC (2.0x) but the highest IRR (26%) because the money was returned in only 3 years. PE firms optimize for IRR because it measures the rate of return, factoring in time.
LBO Value Creation
How PE sponsors turn $450M into $1.1B in 5 years
MOIC — Multiple on Invested Capital
MOIC is calculated as Total Value Received divided by Total Equity Invested. A 3.0x MOIC means the investor received three dollars for every dollar invested. MOIC is simple, intuitive, and ignores the time dimension entirely. It's the headline number in PE — funds report gross and net MOICs across their portfolio. However, MOIC alone can be misleading: a 5.0x over 15 years is very different from a 5.0x over 4 years.
IRR — Internal Rate of Return
IRR is the discount rate that makes the net present value (NPV) of all cash flows equal to zero. It captures both the magnitude and timing of returns. PE firms target IRRs of 20-25%+. IRR is highly sensitive to timing — receiving cash earlier dramatically increases IRR. This is why PE firms use dividend recaps, quick add-on acquisitions, and other strategies to accelerate cash returns in LBO investments. However, IRR can be 'gamed' by timing and subscription credit lines.
When Each Metric Matters
LPs care about both metrics but weight them differently depending on context. IRR matters more for fund-level performance comparison and determines carried interest timing. MOIC matters more for assessing absolute wealth creation. A fund with 30% IRR but 1.5x MOIC (short holds, small gains) may generate less total profit than a fund with 18% IRR but 3.0x MOIC (longer holds, bigger gains). The best deals have both high IRR and high MOIC.
Worked Example — With Real Numbers
Deal A: Invest $100M, exit at $300M ([enterprise value](https://www.ibflash.com/concepts/enterprise-value)) after 7 years. MOIC = 3.0x, IRR ~ 17%. Deal B: Invest $100M, exit at $200M after 3 years. MOIC = 2.0x, IRR ~ 26%. Deal B has a lower MOIC but higher IRR because the capital was returned much faster and can be redeployed sooner.
Key Takeaways
MOIC measures absolute return magnitude; IRR measures time-adjusted annualized return
A higher MOIC does not always mean a higher IRR — holding period is the key difference
PE firms target 20-25%+ IRR and 2.0-3.0x+ MOIC as benchmark returns
IRR can be artificially inflated by subscription credit lines and early cash distributions
Common Mistakes in Interviews
Assuming higher MOIC always means a better investment — a 5.0x over 12 years is only ~14% IRR
Ignoring the time value of money when comparing deals with different holding periods
Forgetting that IRR assumes intermediate cash flows can be reinvested at the IRR itself, which is often unrealistic
How Interviewers Test This
This is a classic PE interview question: 'Would you rather have a 3.0x in 7 years or a 2.0x in 3 years?' Walk through the IRR math, explain the tradeoff, and note that LPs care about both — IRR for fund-level benchmarking and MOIC for absolute wealth creation. Understanding the sources and uses table is key to LBO return analysis. Practice with the IB Quiz.
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