IRR (Internal Rate of Return)
The discount rate at which the net present value of a fund's cash flows to an investor equals zero — a money-weighted return sensitive to cash-flow timing.
Definition
The internal rate of return (IRR) is the discount rate at which the net present value of a series of cash flows equals zero. For a limited partner, those cash flows are every capital call or subscription (a cash outflow, from the LP's perspective) and every distribution or the residual value of their remaining stake (a cash inflow), each dated to when it actually occurred.
IRR is a money-weighted (dollar-weighted) measure: it accounts for exactly when and how much each dollar went in and came back out. It is the opposite of a time-weighted return (TWR), which geometrically links sub-period returns precisely to strip out the effect of cash-flow size and timing and is the standard for comparing manager skill. This is what distinguishes it from TVPI, DPI, and MOIC, which measure the magnitude of return as a pure multiple of capital invested but are blind to how long that capital took to produce it. Two funds can return an investor's capital at the exact same multiple while having very different IRRs, purely because one did it faster.
IRR is usually computed as XIRR — the version of the calculation that handles cash flows falling on irregular, real calendar dates rather than assuming they land on neat annual anniversaries, which better fits how capital actually moves in and out of a fund.
Why it matters
IRR is one of the headline performance figures LPs use to compare managers, and because it rewards speed as much as size of return, it can make an aggressive early-distribution strategy look better than a patient one even when the patient strategy eventually returns more total dollars — which is exactly why it should be read alongside a multiple like TVPI, not in isolation.
IRR is also frequently more than a reporting metric: carried-interest structures often key the manager's carry to clearing a hurdle rate expressed as an IRR, so the number can be the literal trigger that determines whether — and how much — the GP gets paid.
Internal rate of return
With more than two cash flows, this equation generally has no closed-form solution — IRR is solved numerically (iteratively narrowing in on the rate that satisfies the equation to a small tolerance), which is exactly what spreadsheet XIRR functions and portfolio-monitoring tools do under the hood.
A single call and a single distribution
An LP funds a $1,000,000 capital call at inception and receives a single $1,331,000 distribution exactly three years later, with no cash flows in between. Because there is only one outflow and one inflow, IRR solves directly rather than needing an iterative search: IRR = (Distribution ÷ Call)^(1/years) − 1 = ($1,331,000 ÷ $1,000,000)^(1/3) − 1 = 1.1 − 1 = 10%.
Checking the result: at a 10% discount rate, the present value of the $1,331,000 distribution is $1,331,000 ÷ 1.1³ = $1,331,000 ÷ 1.331 = $1,000,000 — exactly offsetting the $1,000,000 call, so the net present value is $0 and 10% is confirmed as the IRR.
Common mistakes
Comparing IRRs across funds with different cash-flow timing as if they were directly comparable — the same total profit realized faster always produces a higher IRR, even when the underlying investment performance is identical.
Treating IRR as equivalent to a simple compounded annual return on a lump sum — the two only coincide when there is exactly one inflow and one outflow, as in the example above; with multiple interim calls and distributions, IRR and a naive CAGR calculation diverge.
Ignoring how a subscription line of credit affects reported IRR — a facility that lets the GP delay calling LP capital shortens the LP's own holding period for that capital, which can inflate the fund's reported IRR relative to one that calls capital the moment it is needed.
Treating an early-stage fund's 'IRR to date' as meaningful — with little capital called and few or no realized distributions yet, early IRR figures are extremely sensitive to the timing of a single small cash flow and are not comparable to a mature vintage.
In practice
Crypto funds that run continuous subscription and redemption cycles across many LPs, each entering and exiting at different times, generally need to compute IRR both at the fund level (using the fund's own aggregate cash flows) and at the individual investor level (using each LP's specific call and distribution dates) — the two can diverge meaningfully when subscription and redemption timing varies a lot across the investor base.
Strategies with irregular liquidity events — staking unlock schedules, token vesting cliffs, or a DeFi position that only becomes withdrawable after an unbonding period — add real cash-flow timing uncertainty to an IRR calculation that a simple liquid-asset strategy doesn't face, since the actual date of a future distribution isn't always known in advance.
Questions, answered
What is IRR in a hedge fund or private fund context?
IRR (internal rate of return) is the discount rate at which the net present value of an investor's cash flows to and from a fund equals zero. It measures return in a way that accounts for exactly when capital was called and distributed, not just the total amount.
How is IRR different from TVPI or MOIC?
IRR is money-weighted, so it rewards returning capital faster — the timing of every cash flow moves the figure. TVPI and MOIC are pure multiples of invested capital that ignore timing entirely. A fund can have a high TVPI with a mediocre IRR if it took a long time to realize the value, or vice versa.
Can IRR be calculated by hand?
Only in the simplest cases, such as a single capital call followed by a single distribution, where it can be solved directly. With multiple calls and distributions on different dates, IRR generally has no closed-form solution and is instead solved numerically, as spreadsheet XIRR functions do.
Why can two funds have the same total profit but different IRRs?
Because IRR is sensitive to timing, not just magnitude. A fund that returns a given profit in two years will show a higher IRR than one that takes five years to return the same total profit, even though the dollar amount earned is identical.
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