Someone tells you a deal has a "20% IRR" and it's supposed to sound impressive. And it might be — or it might be mediocre, or even bad, depending entirely on one thing nobody mentions in that sentence: compared to what? A 20% IRR on a government bond would be historic. A 20% IRR on a startup investment might actually be disappointing. The number alone tells you almost nothing. What you compare it to tells you everything.

Quick Recap: What IRR Actually Means

Internal Rate of Return (IRR) is the annualized return a series of cash flows is projected to generate — it's the discount rate at which the investment's net present value calculation comes out to exactly zero. If you're unfamiliar with the mechanics, it's worth running your own numbers through an IRR and NPV calculator first — this article assumes you already have an IRR number in hand and want to know what to actually do with it.

"Good" Is Relative — Here's What It's Relative To

A "good" IRR is simply one that comfortably beats your next-best alternative, adjusted for how much risk you're taking on to get there. This is why professional investors talk about a "hurdle rate" or "required rate of return" instead of a single universal target — the bar you need to clear is different depending on what you're actually comparing the investment to, and how much could realistically go wrong.

That means the honest answer to "what counts as a good IRR" isn't one number. It's a different number depending on the category of investment you're evaluating. The interactive panel below breaks down realistic benchmarks by category, based on how these asset classes have actually performed.

🎯 What's a Good IRR for My Type of Investment?

The Comparison Table (For Quick Reference)

The Mistake Almost Everyone Makes

The most common error isn't picking the wrong number — it's comparing an IRR to the wrong benchmark entirely. Comparing a risky small-business IRR to a savings account rate makes almost anything look incredible; comparing that same IRR to what a diversified index fund could realistically deliver, at a fraction of the risk and effort, is a much fairer test. The right question is never "is this IRR positive?" — it's "is this IRR high enough to justify taking on this specific risk instead of an easier, safer alternative?"

This is also exactly why NPV often matters more than IRR in practice: a strong IRR on a tiny deal can still create less real value than a modest IRR on a much larger one. If you haven't already, it's worth running both the NPV and IRR for your own numbers side by side rather than judging IRR in isolation.

The Time Factor: Why a 15% IRR Isn't the Same Over 1 Year as Over 10

IRR is already annualized, which makes it tempting to compare a one-year deal and a ten-year deal on the same number as if time doesn't matter. It does. A 15% IRR promised over one year means you're exposed to whatever could go wrong for twelve months before you get your capital and return back — plenty of time for markets to move against you, but not endless time. A 15% IRR promised over ten years means you're locked into that assumption holding up across a full decade of recessions, rate changes, competitive shifts, and everything else that can happen in ten years. The annualized number looks identical; the actual risk you're carrying is not even close.

This is why sophisticated investors often demand a higher IRR for longer-duration commitments — not because the math changes, but because more time means more opportunities for the underlying assumptions to break. A quick way to sanity-check this yourself: ask what has to remain true, uninterrupted, for the entire length of the investment for that IRR to actually show up. The longer that list of "has to stay true," the more skeptical a given IRR deserves.

Adjusting for Inflation: A "Good" IRR Moves With the Economy

Every benchmark in the table above assumes a roughly normal inflation environment. That assumption breaks down fast when inflation spikes — as it did across the US, UK, and much of Europe in 2022, briefly pushing above 8-9%. An IRR that looked comfortably "good" in a 2% inflation world can quietly become mediocre or even negative in real, inflation-adjusted terms during a high-inflation stretch. A 6% IRR sounds fine next to a savings account paying 1%, but if inflation is running at 7%, that "good" investment is actually losing purchasing power every year.

The practical fix is simple but often skipped: subtract the prevailing inflation rate from your IRR before comparing it to a benchmark, especially when evaluating anything with a multi-year holding period. A nominal 10% IRR during 2% inflation (roughly an 8% real return) is a genuinely different animal than a nominal 10% IRR during 7% inflation (closer to a 3% real return) — even though both show the identical 10% on paper.

Red Flags: When a "Good" IRR Is Actually a Warning Sign

Not every impressive-looking IRR deserves to be taken at face value. A few patterns are worth watching for:

• Returns that sound too good for the stated risk level. A "low-risk" deal promising a 20%+ IRR should raise questions immediately — genuinely low-risk assets simply don't produce those returns consistently, and history is full of frauds that used exactly this pitch.
• Survivorship bias in advertised returns. Venture capital funds and startup accelerators often publicize their winners' IRRs while quietly excluding the majority of investments that returned nothing — the honest picture requires looking at the whole portfolio, not the highlight reel.
• Assumptions that require everything to go right. If a projected IRR only holds up under a best-case scenario with zero delays, zero cost overruns, and immediate full occupancy or adoption, treat that number as a ceiling, not an expectation.
• IRRs juiced by unusually short holding periods. Flipping an asset quickly can produce a dramatic annualized IRR from a fairly modest total dollar gain — always check the actual dollar profit (or run the NPV alongside the IRR) rather than judging the percentage alone.

Frequently Asked Questions

Is a 10% IRR good?
It depends entirely on the risk. A 10% IRR on a diversified stock index is right at the historical average and considered solid. A 10% IRR on a small business or startup is generally considered underwhelming, since investors take on far more risk there expecting a meaningfully higher return.

What IRR do venture capitalists target?
Most VC firms underwrite individual deals expecting 25-35%+ IRR on the investments that succeed, specifically because a large share of their portfolio companies fail completely and return little or nothing.

Should I always choose the investment with the highest IRR?
No. IRR ignores the size of the investment and the total dollar value created. A small deal with an exceptional IRR can still add less real wealth than a larger deal with a moderate IRR — this is exactly why NPV is often considered the more reliable metric for comparing options of different sizes.

Does a negative IRR always mean I should reject a project?
Essentially yes for a standalone financial decision — a negative IRR means the investment is expected to destroy value even before comparing it to any alternative. There can be non-financial reasons to proceed anyway (strategic positioning, for example), but purely on the numbers, a negative IRR fails the most basic test.

How does IRR differ from a simple return-on-investment (ROI) calculation?
ROI typically measures total return without accounting for when cash flows happen, while IRR explicitly weighs the timing of each cash flow. Two investments can have identical total ROI but very different IRRs if one returns money much earlier than the other.

Can a project have a good IRR but still be a bad idea?
Yes — IRR only measures financial return, not feasibility, execution risk, or how realistic the underlying assumptions actually are. A spreadsheet can show a great IRR for a plan that has almost no chance of unfolding as projected.

The Bottom Line

There's no single universal "good IRR" — there's only a good IRR for the specific type of risk you're taking on. A 12% IRR is outstanding for a bond and mediocre for a startup. Before you get excited (or discouraged) about a number, ask what you'd realistically earn on the next-best alternative with similar risk — that comparison, not the raw percentage, is what actually tells you whether an investment is worth making.