The 10,000-Hour Rule and the Solo Founder

by TFE Editor · 6 min read
The 10,000-Hour Rule and the Solo Founder

“It takes 10,000 hours to become an expert” is one of those facts everyone knows and few people have checked. It’s tidy, it’s motivating, and it’s a bit misleading. For a solo founder, who has to be the salesperson, the writer and the delivery team at once, it can do real damage in either direction: it can make you think mastery is simply a matter of clocking time, or make you decide it’s so far away that there’s no point starting.

Here’s where the number came from, what the research does and doesn’t say, and what to do with the useful part: how you practice matters at least as much as how long.

Where the number came from

The research behind the rule is a 1993 paper in Psychological Review by K. Anders Ericsson, Ralf Krampe and Clemens Tesch-Römer. They studied violin students at a Berlin music academy, split into groups by level, and compared how much time each had spent practicing alone. The strongest group had, on average, accumulated about 10,000 hours of solitary practice by age 20 (and a mean of roughly 7,400 hours by age 18). The less accomplished groups had logged fewer.

The paper’s real subject wasn’t a magic number. It was deliberate practice: focused, structured effort aimed at improving a specific skill, typically guided by a teacher, with feedback and a stretch beyond your current comfort zone.

Malcolm Gladwell popularized the figure in his 2008 book Outliers, where it became “the 10,000-hour rule.” If you want a full breakdown of the book’s argument, our sister site The Growth Reads has an Outliers review.

What Ericsson said got lost

Ericsson later wrote his own account in his 2016 book Peak (co-written with Robert Pool), and in an essay adapted from it. His main objections to the popular version were these:

  • It was an average, not a threshold. By his account, only half of the ten violinists in the top group had reached 10,000 hours by age 20.
  • Nothing is magic about the number. The hours needed vary by field. Ericsson noted that top international pianists typically have around 20,000 to 25,000 hours behind them by about age 30, while a record-setting digit memorizer in one of his studies got there in a few hundred.
  • Not all hours are equal. Gladwell didn’t separate deliberate practice from other kinds of time spent on a skill. Ericsson argued, for instance, that the Beatles’ famous stage hours in Hamburg were performances, not deliberate practice, and well short of 10,000 hours.
  • The study didn’t prove anyone can become an expert. It compared students who had already been admitted to an academy; it didn’t take random people and train them.

Ericsson did agree with the central point that serious expertise takes years of substantial effort. His bigger message was that people keep improving when the training is right. The book is worth reading if the topic grabs you, and The Growth Reads reviews Peak as well.

The pushback

Other researchers have argued that deliberate practice explains less than its fans claimed. A 2014 meta-analysis in Psychological Science by Brooke Macnamara, David Hambrick and Frederick Oswald pooled 88 studies and estimated the share of performance differences explained by deliberate practice: about 26% in games, 21% in music, 18% in sports, 4% in education and under 1% in professions, with about 12% overall. Macnamara put it mildly: “It is just less important than has been argued.”

In 2019, Macnamara and Maitra ran a replication of the original violin study in Royal Society Open Science, with 39 students in three groups of 13. Both the best and the good violinists had averaged more than 10,000 hours of solitary practice by age 20, but the difference between those two groups wasn’t statistically significant, and practice explained less of the variation in skill than in the 1993 results. The authors raised several possible reasons for the gap and stressed they hadn’t tested them.

How should a working founder read this? Practice clearly matters a great deal, especially for skills with clear rules and quick feedback. But hours logged are a poor score for your career. “Professions” is a messy category, so don’t read that under-1% figure as proof that practice is pointless; read it as a warning against treating time on the clock as the measure of how good you’ve become.

What deliberate practice looks like when you work alone

The problem for a solo founder is that you accumulate plenty of hours and very little practice. You send the hundredth proposal the way you sent the first. You write the same kind of post you always write. Nobody is watching, so nobody says “try it this way.” Ericsson’s recipe suggests a fix with four parts: a specific target, a model to copy, fast feedback and a stretch.

Selling

Pick one narrow skill per month: opening a discovery call, handling the price objection, asking for the decision. Rehearse it out loud before the next conversation, because ad-libbing is for amateurs. With consent, record real calls and review them against a short checklist. After each one, write down the exact words where the prospect’s energy dropped.

Where AI helps: play the skeptical buyer in a role-play and critique your answers against a rubric you wrote. What you decide: what “good” looks like and which feedback to act on. What you check: that a rehearsal partner isn’t a real buyer. Real replies, booked calls and closed deals are the actual scoreboard. Our piece on the definition of a sales professional is a good yardstick for what you’re aiming at.

Writing

Writing is the easiest skill to practice because feedback can be fast. Justin Welsh, who runs a one-person business, told Indie Hackers he had been posting daily for about 900 days at the time of the interview. Whatever you think of social media, a daily publishing habit builds in a loop of publishing, seeing what lands and adjusting. You can create your own: one piece a week, one named skill per piece (an opening line, a tighter ending), and a side-by-side comparison with a piece you admire.

Shipping

Pieter Levels’ “12 startups in 12 months” challenge in 2014 is a useful example of practicing a specific skill instead of just clocking hours. By his own account, he set out to fix two habits he saw in creative people: failing to finish projects and fearing the launch. Twelve short cycles of idea, build, launch is a practice schedule with built-in market feedback.

Delivering

After each project, hold a 15-minute review: what went well, what took too long, what you’d do differently, and one change to your process. Keep a checklist and update it. A peer or mentor who looks at your work once a quarter is worth far more than another solo month of guessing.

Count reps, not hours

Instead of tracking hours, try tracking focused reps on named skills. For example: three 45-minute sessions a week on one skill, with a feedback step built into each. That’s about two hours a week, so it won’t reach 10,000 hours any time soon. At 20 focused hours a week, that threshold is roughly a decade away. But you don’t need mastery to be paid. Customers buy the result you deliver now, and being clearly better than their alternatives comes far sooner than being the best in the world. Small, steady improvements add up, which is the premise of the one percent solution.

There’s one more reason not to fixate on the number: Ericsson himself worried that the framing of a huge total can put people off starting at all.

The takeaway

The 10,000-hour rule is a myth that points at something true. Expertise takes sustained effort, but the number isn’t a magic threshold, hours alone are a weak score, and the quality of your practice matters more than the length of it. Choose one skill that would change your income, find a way to get fast feedback, practice it on purpose for a few weeks, then choose the next. If you’d like a head start on the AI side of this, grab the free “One-Person Business AI Stack” checklist for ideas on turning an assistant into a practice partner.

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