Like many investors, I have spent countless hours studying Warren Buffett’s career.
Buffett’s philosophy of thinking about a stock as an ownership interest in a business has influenced generations of successful money managers and private investors. His influence is well known in the investment community. It is less commonly discussed among small business owners.
That is unfortunate, because many of Buffett’s most important lessons apply just as well to people running private companies as they do to investors buying publicly traded stocks.
The timing of this article is no coincidence. In September 2026, Warren Buffett stepped down as chairman of Berkshire Hathaway, the holding company that he and his late partner, Charlie Munger, built over more than half a century.
Buffett took control of Berkshire Hathaway, then a New England textile company, in 1965. He was still running an investment partnership at the time.
When Buffett liquidated the partnership in 1969, he gave his investors the option of receiving Berkshire Hathaway shares instead of cash. Although he did not explicitly state his long-term plans for Berkshire, he did tell investors that he and his family would take shares rather than cash.
Those who followed him were well rewarded. From 1965 until Buffett’s retirement as CEO in 2025, Berkshire Hathaway stock returned nearly 20% annually. A $10,000 investment in Berkshire in 1965 would have grown to roughly $500 million by 2025.
There is no question that Buffett’s stock-picking ability played a major role in Berkshire’s success.
However, Berkshire is primarily a collection of wholly owned businesses that Buffett and Munger assembled over decades. Collectively, these businesses became one of the most successful conglomerates in corporate history.
Buffett was not involved in the day-to-day management of most Berkshire subsidiaries. He famously gave operating managers a great deal of autonomy. At the same time, he closely monitored the economics of those businesses. That gave him a unique perspective on American capitalism.
Buffett has often said that he became a better investor because he was a businessman, and a better businessman because he was an investor. That idea is central to this article.
The drivers of business value are the same whether the company is a small private business or a large public corporation.
I have spent much of my career with one foot in the small business world and another in public-company research. I have never viewed those as separate disciplines.
The lessons are numerous, but I have condensed them into five.
I also have to admit that I have not always followed them myself. In fact, some of my biggest mistakes in business have come from violating these principles.
1. Stay Within Your Circle of Competence
One of Warren Buffett’s most important principles is the circle of competence.
Buffett has repeatedly said that he only invests in or purchases businesses that he understands. This does not mean an investor or business owner needs to understand every company or every industry. It means recognizing the boundaries of what you understand well enough to make an informed decision.
For investors, the circle of competence means understanding the underlying economics of a business.
Investors try to view the business from the perspectives of:
- Customers
- Suppliers
- Competitors
- Employees
- Owners
They ask questions such as:
- How will customers respond to higher prices?
- How easy is it for a new competitor to enter the market?
- What gives this business an advantage?
- How sensitive are profits to changes in costs?
- What could cause customers to leave?
The goal is to understand the business well enough to make an intelligent investment decision.
What Does Circle of Competence Mean for Business Owners?
For business owners, the concept goes a step further.
The circle of competence involves not only understanding the economics of a business, but also understanding the time, effort, and operating demands required to run it successfully.
I have seen this principle violated many times.
For example, someone with discretionary capital and a love of food may decide to open a restaurant despite having no experience in the restaurant business.
Restaurants are difficult businesses.
They often face:
- Tight margins
- High employee turnover
- Changing customer preferences
- Volatile food costs
- Intense competition
- Significant operating complexity
Aspiring restaurant owners may underestimate the effort required and overestimate the potential economic payoff.
The broader lesson is simple:
Staying within your circle of competence means understanding the facts, economics, and operating demands well enough to make an intelligent decision.
A good opportunity outside your circle of competence may still be a poor opportunity for you.
2. Hire and Work With Great Managers
One of Buffett’s most underappreciated strengths is his ability to identify excellent managers.
Berkshire Hathaway has owned dozens of operating businesses across very different industries, yet Buffett historically gave the managers of those businesses substantial autonomy.
That approach only works when the right people are in place.
In the many years I have spent in the small business world as both a shareholder and advisor, I have become increasingly convinced that there is no such thing as a great business independent of the people who make that business operate.
Great managers make sure that:
- Customers are taken care of
- Employees are treated well
- Vendors are managed properly
- Incentives support long-term thinking
- Resources are allocated intelligently
They also build cultures that support durable success rather than short-term results.
Great Managers Focus on Operating Efficiency
Management quality becomes especially important in businesses with little room for error.
Companies with low margins and long cash conversion cycles can be particularly unforgiving.
The cash conversion cycle is the time between paying for inventory and collecting cash from customers, adjusted for the time the company can delay payments to suppliers.
Businesses with long cash cycles may have substantial amounts of capital tied up in operations.
For these companies, efficient management of:
- Operating expenses
- Inventory
- Receivables
- Supplier payments
- Capital expenditures
can determine the difference between success and failure.
For small business owners, the lesson is clear.
Hiring the right people is not simply an administrative task. It is one of the most important capital allocation decisions an owner can make.
3. Focus on the Micro Economy
Warren Buffett has often said that he focuses on the micro rather than the macro.
Microeconomics is the branch of economics that studies the behavior of individual firms and households.
Macroeconomics focuses on the broader economy and topics such as:
- Interest rates
- Inflation
- Tax policy
- Trade policy
- Monetary policy
- Economic growth
Buffett has historically been skeptical of economic forecasting.
Economies are complex adaptive systems, and forecasting their direction with consistent accuracy is extremely difficult.
Rather than basing investment decisions on predictions about the economy, Buffett has focused much more heavily on microeconomic questions.
For example:
- How will customers respond to a price increase?
- What gives a business pricing power?
- How difficult is it for competitors to enter the market?
- Can the company maintain its competitive advantage?
- How efficiently does the company use capital?
These questions are usually more directly connected to the economics of the business.
Buffett Does Not Ignore Macroeconomic Risks
Focusing on microeconomics does not mean ignoring the broader world.
Buffett famously reads multiple newspapers every day and has always maintained a broad understanding of economic, political, and business developments. The distinction is about focus.
He understands macroeconomic risks, but he does not build his decision-making process around trying to forecast them precisely.
Business owners can apply the same principle. Owners should understand how interest rates, taxes, regulation, and economic conditions may affect their businesses.
At the same time, unless public policy directly affects the industry, owners may be better served by focusing most of their energy on:
- Serving customers
- Improving operations
- Strengthening competitive advantages
- Developing employees
- Allocating capital intelligently
In most cases, those are the factors business owners can actually influence.
4. Find the Highest and Best Use of Capital
Business owners are often eager to expand.
Expansion can feel like progress. However, growth does not automatically create value.
Basic finance theory says that companies should invest in projects when the expected return exceeds an appropriate hurdle rate representing the company’s cost of capital.
For example, if a company has a 15% hurdle rate and a project is expected to generate a 20% annual return, the project would generally be considered attractive.
Buffett’s approach went further. Rather than focusing only on whether a project cleared a predetermined hurdle rate, he sought the highest and best use of capital.
That means comparing all available alternatives.
Capital Allocation Is About Opportunity Cost
When stocks were inexpensive relative to value, Buffett aggressively purchased stocks.
When public stocks were expensive relative to private businesses, Berkshire focused more heavily on acquiring entire companies.
When attractive investments were unavailable, Buffett was willing to accumulate cash.
What mattered was the relationship between: Price and Value across competing opportunities.
This is fundamentally an opportunity-cost framework.
Every dollar used for one purpose cannot simultaneously be used for another.
A business owner deciding whether to open another location should therefore ask more than:
Will this new location earn an acceptable return?
The owner should also ask:
Is this the best available use of the money?
Alternative uses might include:
- Expanding an existing location
- Investing in technology
- Hiring additional employees
- Paying down debt
- Acquiring another business
- Building cash reserves
- Distributing capital to owners
The correct decision depends on the expected return, risk, and strategic value of each alternative.
Growth Is Not the Same as Value Creation
This distinction is especially important for private businesses.
Owners may become focused on:
- Revenue
- Number of locations
- Employee count
- Market share
Those measures can signal growth, but they do not necessarily signal value creation.
A smaller company earning attractive returns on capital may be more valuable than a larger business continually investing at poor returns.
The goal should not be growth at any cost. The goal should be the intelligent allocation of capital.
5. Invest in Knowledge and Learning
Warren Buffett has a remarkable intellect.
Few people can match his ability to absorb and retain information. However, everyone can learn from his relentless commitment to reading and learning.
Buffett is famous for reading hundreds of pages per day, including:
- Annual reports
- Newspapers
- Business publications
- Company filings
- Books
He is also widely read in history and has cited historical study as an important contributor to better business and investment decisions.
Charlie Munger was perhaps even more widely read.
Munger studied subjects ranging from:
- Physics
- Psychology
- Sociology
- Anthropology
- Economics
- History
His belief was that better decisions come from understanding multiple disciplines rather than viewing every problem through a single framework.
I have met many highly successful people throughout my career. One trait they consistently shared was an interest in lifelong learning, both within their own fields and beyond them.
This principle applies to everyone, not only investors or business owners. Spending more time reading, studying, and thinking can improve the quality of decisions across nearly every area of life.
What Business Owners Can Learn From Warren Buffett
Buffett’s philosophy can be distilled into a practical framework for business owners:
Know What You Understand
Operate within a circle of competence and recognize when you lack the knowledge needed to make a sound decision.
Surround Yourself With Good People
Strong businesses depend on strong managers, employees, and operating cultures.
Focus on What You Can Control
Understand macroeconomic risks, but spend most of your time improving the economics of your own business.
Allocate Capital Rationally
Compare opportunities and direct capital toward its highest and best use.
Keep Learning
Continuous learning improves judgment, expands your circle of competence, and helps you make better long-term decisions.
These principles are simple. Applying them consistently is much harder.
Why Buffett’s Lessons Apply to Small Businesses
It can be tempting to dismiss Buffett’s experience as irrelevant to the owner of a smaller company.
Berkshire Hathaway operates at a scale few businesses will ever approach. However, the underlying principles are surprisingly transferable.
A small business owner still has to decide:
- Which markets to enter
- Which opportunities to avoid
- Who to hire
- How much inventory to hold
- Whether to expand
- Whether to borrow
- Whether to acquire another company
- Where to invest excess cash
- Which risks deserve attention
These are fundamentally the same types of decisions that capital allocators make at larger companies.
The scale is different. The economics are often the same.
Key Takeaways
- Warren Buffett’s business lessons apply to private business owners as well as public-market investors.
- Staying within your circle of competence means understanding both the economics and operating demands of a business.
- Great managers are essential to long-term business success.
- Business owners should focus primarily on microeconomic factors they can influence rather than trying to forecast the broader economy.
- Growth only creates value when the returns justify the capital invested.
- Capital should be directed toward its highest and best use rather than automatically reinvested in expansion.
- Opportunity cost should be considered whenever capital is deployed.
- Lifelong learning can improve business judgment and expand an owner’s circle of competence.
- The drivers of business value are fundamentally similar in both small private businesses and large public companies.
Final Thoughts
Warren Buffett may have stepped away from operational and capital allocation responsibilities at Berkshire Hathaway, but his lessons will endure.
Through decades of shareholder letters, annual meetings, interviews, and business decisions, Buffett has left an enormous body of investment and business knowledge for future generations.
Those lessons are not limited to stock investing. Business owners can apply many of the same principles.
Understand what you know.
Work with excellent people.
Focus on the economics of the business.
Allocate capital intelligently.
Keep learning.
None of these ideas are complicated. Their value comes from applying them consistently over long periods of time.
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