Profit Is an Opinion: Three Hidden Rules That Decide Which Businesses Survive

Most people believe a business dies when it stops making profit. This is wrong. Many businesses die while their books show a healthy profit. They do not die from losing. They die from a gap between what the paper says and what the bank holds.

Three old rules explain this gap. Most people know their names. Very few know their real meaning.

Rule One: Murphy’s Law Is Not a Joke

People repeat it as a funny line: “Whatever can go wrong will go wrong.” It sounds like a complaint about bad luck. It began as an engineering method.

In 1949, at Edwards Air Force Base in California, engineers tested how much sudden force a human body can survive. A rocket sled carried sensors for the test. An engineer named Edward Murphy found that every sensor had been fitted the wrong way round. Each one could be fitted in two ways, and each one had been fitted incorrectly. His point was simple: if a part can be installed wrongly, someone eventually will install it wrongly. So the design must make the wrong way impossible.

This changes the whole meaning. Murphy’s law does not say “expect bad luck.” It says “stop blaming people and fix the design.”

Think of a shopkeeper who keeps all his accounts on one computer, with no copy anywhere else. When that computer fails, he calls it bad luck. It is not luck. It is a design with one weak point. Professionals use the 3-2-1 backup rule: three copies of the data, on two different types of storage, with one copy kept in a different place. It works because it assumes failure will come.

A backup plan is not a sign of fear. It is a sign that the owner understands how the world works.

Rule Two: Never Assume

In 1999, a spacecraft worth hundreds of millions of dollars was lost near Mars. The Mars Climate Orbiter had travelled for months and then approached the planet too low. The cause was not a broken part. One team’s software produced force numbers in pound-force seconds. The other team’s software expected newton seconds. Each team assumed the other used its own units. No one asked the question.

Brilliant scientists lost a spacecraft because of one unchecked assumption. Now think about a small business.

Imagine a garment exporter in Tirupur who accepts a new overseas buyer. The buyer’s emails are polite. The order is large. The exporter assumes the company is genuine and ships the goods. Three months later, the buyer is unreachable. A simple check of the company’s registration, payment history and bank reference would have taken two days.

This is why the rule has a second half: double check, then triple check. A document can be copied, and a promise can be forgotten. A claim becomes reliable only when it is confirmed at its original source. Not by the person who made it, but by the one who can prove it.

Patience in research looks slow. It is actually the cheapest insurance a business can buy.

Rule Three: Cash Is King, and Profit Is an Opinion

This is the most shocking of the three.

Profit is not a fact. It is a calculation, and the answer depends on choices. How long will a machine last? How should unsold stock be valued? When should a sale be counted: at delivery, or at payment? Two honest accountants can look at the same year and report different profits, and both can be correct.

Cash has no such choice. The money is in the bank, or it is not.

Imagine a fabric trader in Surat who sells goods worth one crore rupees on ninety days of credit. His books show a fine profit the same day. But his weavers, his rent and his staff must be paid within thirty days. He is profitable on paper and unable to pay on the thirtieth day. This is how profitable businesses collapse.

India’s law now recognises this. Since April 2024, Section 43B(h) of the Income Tax Act says that if a buyer does not pay a micro or small enterprise within the time limit, at most 45 days, the buyer cannot claim that expense as a tax deduction for that year. The government is saying that late cash is a real harm, not a small delay.

Now the deepest lesson. In 2009, the founder of Satyam Computer Services confessed that about 5,000 crore rupees of cash and bank balances shown in the company’s books did not exist. Even cash on paper can be false. Cash in the bank, confirmed at its source, is the only cash that counts. Here, Rule Two and Rule Three join together.

The Limit You Cannot See

A balance sheet is a picture of what a business owns. It is a beautiful picture, and it feels like strength. But it does not tell you what you can do tomorrow morning. Only cash tells you that.

The balance sheet shows how big your house is. Cash decides whether you can open the door today.

So remember three things. Expect failure and design for it. Trust nothing until you confirm it. And never mistake an opinion for money.

A business is not measured by what it claims to earn. It is measured by what it can still pay when everything goes wrong.

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