Internal Rate of Return (IRR)

IRR measures both amount and timing

Private funds call capital and return cash at irregular dates. IRR is designed for that pattern because it is a money-weighted return measure.

The calculation solves for the annualized rate at which the present value of contributions equals the present value of distributions plus any ending value. ILPA describes IRR as the discount rate that equates the present value of investment costs with the present value of investment returns.^[1]

The timing matters. Receiving the same dollar profit sooner generally produces a higher IRR.

A simple timing example

Consider two investments that each turn $100 into $150.

• Investment A returns $150 after one year.
• Investment B returns $150 after three years.

The money multiple is 1.5x in both cases.

The IRRs are very different because one investor receives the $50 gain much sooner.

That is why IRR and a multiple such as MOIC or TVPI should be read together rather than treated as substitutes.

Gross IRR and net IRR answer different questions

A fund can report performance before or after investor-level economics.

Gross IRR generally measures performance before management fees and carried interest. Net IRR reflects the return after specified fees, expenses and carried interest attributable to investors.^[1]

The SEC’s marketing-rule guidance adds an important comparability point: when an adviser presents gross and net performance together, the calculations must use the same time period and the same type of return and methodology.^[2]

That matters when subscription credit facilities delay capital calls. A manager should not present gross IRR without the financing effect and compare it with a net IRR calculated on later investor cash-flow dates if doing so produces inconsistent methodologies.^[2]

Why subscription lines can affect IRR

Suppose a fund buys an asset using a credit facility and waits 90 days before calling LP capital.

The underlying investment may have been economically at risk for the full period, but the LP cash outflow occurs later. Because IRR is sensitive to the dates of investor cash flows, delaying that contribution can increase the measured investor-level IRR even if the asset’s purchase and sale prices are unchanged.

This does not make the calculation invalid. It makes the methodology important.

IRR can look strong while realized cash remains limited

An interim IRR can include estimated residual value for investments that have not been sold.

That creates a valuation dependency. CFA Institute research notes that private-equity performance measures can be affected by the difficulty of valuing illiquid, unrealized holdings.^[3]

A high interim IRR therefore does not mean the same thing as cash already returned to LPs.

DPI is useful alongside IRR because DPI focuses on actual distributions rather than unrealized marks.

IRR does not measure scale

A 30% IRR does not tell the reader how many dollars were invested or earned.

A tiny investment can generate a very high IRR without materially affecting a portfolio. Conversely, a large fund can create substantial dollar value at a lower percentage return.

Common mistakes

“Higher IRR always means more money was made.”

No. IRR is a rate, not a dollar-profit measure.

“IRR is the same as MOIC.”

No. MOIC measures a multiple of capital and generally ignores timing. IRR explicitly depends on timing.

“Net and gross IRR are directly interchangeable.”

No. Fees, expenses and carry can create a meaningful spread between them.

“An interim IRR is fully realized.”

Not if the calculation includes remaining portfolio value.

IRR is most informative when the cash-flow methodology is transparent and it is paired with multiples such as DPI and TVPI. For mature funds, realized distributions also help show how much of the reported return has moved from valuation to cash.