A high internal rate of return is not automatically a good result. Whether a high IRR is always good depends on how it compares to your cost of capital, how the timing of cash flows shaped the percentage, what reinvestment rate the math quietly assumed, whether the dollars created actually beat a larger project with a lower rate, and what the figure looks like after fees and taxes. The percentage on the page is a starting point for questions, not an answer.
What Counts as a High IRR in the First Place
There is no universal threshold. What reads as strong depends on the asset class, the risk, and the rate environment. A 12% IRR on a stabilized commercial property with predictable cash flows can be an excellent risk-adjusted return; the same 12% on an early-stage startup, where most investments fail outright, would be disappointing.
Rough industry benchmarks help set expectations:
- Private equity buyouts: 20–25% is widely considered strong.
- Seed-stage venture capital: 30% or higher, reflecting the failure rate of early companies.
- Later-stage venture capital: closer to 20%, since more mature startups carry less risk.
- Core real estate: 8–12%, consistent with the relatively stable income these properties generate.
- Public equities: roughly 8–10% annually for broad market indexes over the long term.
These figures shift with interest rates. When risk-free Treasury yields sit above 4%, every investment has to deliver more to justify its added risk. A 15% IRR looked exceptional when Treasury rates were near zero; the same figure is less striking when safer alternatives yield 4–5%.
Does the IRR Beat Your Cost of Capital?
The most direct test of whether an IRR is good is comparing it to your cost of capital, the minimum return you need to cover what it costs to fund the investment. For corporations, this is often expressed as the weighted average cost of capital (WACC), which blends the cost of debt and the cost of equity. As of early 2026, the average WACC for U.S. publicly traded companies sits in the range of roughly 7–8%, though it varies widely by industry and capital structure.
An IRR above your WACC means the project creates value beyond what it costs to finance. An IRR below your WACC means you are losing money on a risk-adjusted basis, even if the raw return is positive. The size of the spread matters. A project with a 22% IRR against an 8% WACC generates a 14-point surplus, leaving room for unexpected costs or revenue shortfalls. A project with a 10% IRR against the same 8% WACC has only a 2-point cushion, and any negative surprise can push it underwater.
Many investors set a hurdle rate slightly above their WACC to build in a margin of safety. A company with an 8% WACC might require 12% before approving any project. That extra buffer covers estimation error, execution risk, and the opportunity cost of tying up capital that could be deployed elsewhere.
How Timing Inflates the Percentage
IRR is deeply sensitive to when cash flows arrive. A project that returns your money quickly can produce a dramatically higher IRR than one that delivers larger total profits spread over a decade. The formula rewards speed because it discounts future cash flows; money received sooner gets less discounting, which pushes the annualized rate up.
Consider two investments, each requiring $100,000. Project A returns $130,000 after one year and ends. Project B returns $25,000 per year for eight years, totaling $200,000. Project A has the higher IRR because all the cash arrives immediately, but Project B generates $70,000 more in total profit. Choosing on IRR alone leaves money on the table.
This timing sensitivity also lets a fund manager boost the reported IRR by using a credit facility to delay drawing investor capital until a deal is about to close, shortening the measured holding period without improving the underlying investment.
The Reinvestment Assumption Hiding in the Formula
IRR carries a quiet assumption: every dollar of interim cash flow gets reinvested at the same rate as the project’s own IRR. If a project shows a 35% IRR, the math assumes you can immediately place every returned dollar into another opportunity earning 35%. In practice, that’s rarely possible. Reinvestment opportunities tend to earn something closer to your cost of capital or the prevailing market rate, not the exceptional return of a standout project.
When actual reinvestment rates are lower than the calculated IRR, your real-world return will fall short of the headline number. The higher the IRR, the wider the gap. A 15% IRR is only slightly overstated if you reinvest at 10%, but a 50% IRR is dramatically overstated if reinvestment opportunities top out at 8%.
The Modified Internal Rate of Return (MIRR) corrects for this. It lets you specify the rate at which interim cash flows are reinvested, usually your cost of capital, rather than assuming they earn the project’s own rate. MIRR also accounts for the financing rate on the initial outlay. The result is almost always lower than the standard IRR, but it reflects what you will actually earn. Spreadsheet programs typically calculate MIRR with a built-in function that takes three inputs: the cash flow stream, the financing rate, and the reinvestment rate.
When a Lower IRR Creates More Wealth Than a Higher One
IRR tells you the rate of return. Net present value (NPV) tells you the dollar amount of value created. These two metrics can point in opposite directions, especially when you are choosing between projects of different sizes.
A small side project might yield a 50% IRR but generate only $5,000 in NPV. A large acquisition might produce a 12% IRR but add $3 million in NPV. If you can only pursue one, the 12% project creates far more wealth. IRR ignores scale. It treats a $10,000 investment the same as a $10 million one as long as the percentage is the same. NPV does not have that blind spot because it measures value in absolute dollars.
When comparing mutually exclusive projects, NPV is the more reliable guide. When ranking many independent projects under a limited budget, IRR can help identify the most efficient use of each dollar. A project with a strong IRR above your hurdle rate and a positive NPV is a clear winner. When the two metrics disagree, the assumptions deserve a closer look.
What Taxes Do to the Realized Return
A high pre-tax IRR does not guarantee a high after-tax return. The federal tax rate on your gains depends on how long you held the asset and your total income. For 2026, long-term capital gains on assets held longer than one year are taxed at 0%, 15%, or 20% depending on taxable income.1Internal Revenue Service. Revenue Procedure 2025-32
High earners face an additional 3.8% net investment income tax on investment income above $200,000 for single filers or $250,000 for married couples filing jointly.2Internal Revenue Service. Topic No. 559, Net Investment Income Tax Combined, the top effective federal rate on long-term gains can reach 23.8%. State taxes may add several more percentage points depending on where you live.
Fund managers who receive carried interest face a stricter holding period. Under federal law, carried interest must be tied to assets held for more than three years, rather than the standard one year, to qualify for long-term capital gains treatment. Gains on carried interest that fail to meet the three-year threshold are taxed as ordinary income at rates up to 37%.3Office of the Law Revision Counsel. 26 U.S. Code 1061 – Partnership Interests Held in Connection With Performance of Services A fund that produces a high IRR through rapid deal turnover can deliver a lower after-tax return to the manager than a slower strategy that clears the three-year bar.
Gross IRR, Net IRR, and What the Marketing Rule Requires
An IRR figure in a fund’s marketing materials may be a gross number, calculated before management fees, carried interest, and fund expenses come out. The gap between gross and net can be large. A 25% gross IRR might shrink to 17% or less after a typical “2 and 20” fee structure of a 2% annual management fee plus 20% of profits.
The SEC’s marketing rule for investment advisers (Rule 206(4)-1) requires that any advertisement showing gross performance also present net performance with equal prominence, over the same time period and using the same methodology.4U.S. Securities and Exchange Commission. Marketing Compliance – Frequently Asked Questions The rule also targets the credit-facility tactic. If a fund calculates gross IRR starting from the date capital was actually called rather than when investors committed it, the net IRR must use the same starting point. Mixing methodologies, such as showing a gross IRR that excludes the impact of a subscription credit facility alongside a net IRR that includes it, violates the rule.
Federal securities law separately prohibits untrue statements of material fact and omissions necessary to avoid misleading investors in connection with buying or selling securities.5GovInfo. 17 CFR 240.10b-5 – Employment of Manipulative and Deceptive Devices A cherry-picked IRR paired with concealed costs or deceptive inputs can expose the presenter to civil liability.
Before treating any IRR as good news, ask what it is measuring. Is it gross or net? What fees have been deducted? Over what starting date was it calculated? What reinvestment rate does the math assume? How does the dollar value compare to alternatives? And what will actually be left after tax? A high IRR that survives those questions is worth trusting. One that doesn’t is a number, not a return.