Kauffman Fellows reported that companies going public in 2019 had a median age of 11.5 years. If an investment were held that long, a 10x return would be worth about 22% a year.

Founders talk about exits in multiples. Investors are measured on annual returns.

The gap between those two numbers is time, and time is the variable most founders never model.

Below you'll learn the difference between a return multiple and IRR, how to work out the multiple an investor needs, why fund math pushes that number above 10x, and what it all means for you, with a free calculator.

Here is the full breakdown, built on simple examples: a $100,000 investment, a 25% annual hurdle rate, and two deals that both return 3x.

Inside you'll find:

Both numbers describe the same investment. They answer different questions:

For a single investment and a single exit, the link is simple: IRR = multiple^(1 / years) − 1.

Investors care about both, but their own investors (the LPs in their fund) mostly judge them on IRR. That is why an investor can be disappointed by an exit that looks like a success on paper.

→ A multiple without a timeline is only half an answer.

Take the same 3x and stretch it over different holding periods:

The most telling detail is how fast the curve drops in the early years. A 3x in five years just misses a 25% hurdle. To clear it, that 3x would have to arrive within 4.9 years. And if the exit slips by one year, the return falls from 24.6% to 20.1%, a loss of 4.5 percentage points.

That is the time dimension behind the chart at the top. As an illustration, extending an investment holding period from 9.2 to 11.5 years reduces the annual return on the same 10x outcome from 28.4% to 22.2%. Company age at IPO is not the same as an investor's holding period.

→ Every year your company takes to exit is a year your investors' return shrinks, even if the final number stays the same.

Investors rarely start from the multiple. They start from the return they need and the time they expect to wait.

At a 25% annual target, the multiple needed grows quickly with time:

Doubling the holding period from five to ten years does not double the multiple needed. It triples it. That is how compounding works, and it is why a long, uncertain road to exit makes an investor ask for more ownership on day one.

→ When an investor asks "how fast can this get big?", they are really asking which row of this table your company sits in.

Everything above describes a single successful investment. A venture fund does not get to pick only successful ones.

An analysis by Correlation Ventures of about 21,000 US venture financings found that 65% returned less than the money invested, and only 4% returned 10x or more. So the few winners have to cover everyone else.

Here is the math, assuming equal-sized investments made at the start and all exits in year seven. To earn 25% a year over seven years, a portfolio must return 4.8x in total. If only 10% of deals become winners and the rest return an average of 0.3x, each winner has to return about 45x. With 20% winners it is about 23x. Even if half the portfolio wins, each winner still needs about 9x.

These figures ignore management fees and carry, which push the required multiples even higher.

→ That is why an early-stage investor will ask whether your company can return the entire fund. It is not arrogance. It is arithmetic.

Real investments rarely have just one check and one exit. Follow-on rounds, partial secondary sales and delays all change the IRR, even when the multiple stays the same.

Both deals turn money into 3x. Deal A invests $100,000 and exits three years later: a 44.2% IRR. Deal B invests twice, sells part of its stake in year five and exits in year ten: a 15.9% IRR. Same multiple, about one-third of the annual return.

For founders, this changes how you read investor behaviour:

→ If you understand the return your investor is measured on, you can predict what they will push for. That is useful long before you negotiate an exit.

The IRR vs Return Multiple Calculator is a free Excel template with five tabs:

How to use it: set your hurdle rate, enter a scenario, and check it against the Required Multiple and Portfolio Math tabs. To see how these multiples translate into valuation and ownership in each round, pair it with The Enduring Founder VC Method Model.

It is an educational tool, not financial or investment advice. Real funds have fees, carry and irregular cash flows.