Implicit Costs vs Normal Profit
Implicit Costs and Normal Profit are two Production & Costs concepts in AP Economics that students often mix up. Implicit Costs are non-monetary opportunity costs of using the firm’s own resources. Normal profit is the minimum return needed to keep a firm in business, equal to the opportunity cost of the owner's resources. Here is how they compare side by side.
These include the foregone salary of the owner working in the business or the rent that could have been earned by leasing owned property. Implicit costs are included in economic profit but not in accounting profit.
It is the implicit cost of entrepreneurship and is included in economic profit calculations. When economic profit is zero, the firm is earning normal profit, meaning it is covering all costs, including opportunity costs.
Implicit Cost vs Normal Profit: The Same Dollars Named from Two Sides
| Implicit Costs | Normal Profit | |
|---|---|---|
| What the term names | The value of owner supplied resources used in the business | The return that exactly covers those owner supplied resources |
| Typical items | Forgone salary, forgone interest on invested savings, rent on a building the owner already owns | The whole forgone package added up and treated as a required return |
| How it enters the calculation | Subtracted from revenue as a cost | The break even level of accounting profit |
| Relationship to economic profit | Subtracting them turns accounting profit into economic profit | Earned exactly when economic profit is zero |
| What it signals about staying open | Ignoring them makes a losing venture look profitable | Earning it is enough to keep the owner from walking away |
| Appearance on a financial statement | Never, because no money leaves the firm | Never by that name, though the accounting profit equal to it is reported |
A business can clear fifty thousand dollars and still be losing money
An owner leaves a job paying 50,000 dollars a year and puts 100,000 dollars of personal savings into a workshop. Suppose the savings would otherwise earn 6 percent, a rate chosen only to make the arithmetic clean, which is 6,000 dollars a year. Implicit costs are therefore 50,000 plus 6,000, or 56,000 dollars. Now run the year. Revenue is 200,000 dollars and explicit costs, the bills actually paid to suppliers, landlords and employees, come to 150,000 dollars. Accounting profit is 200,000 minus 150,000, or 50,000 dollars, and that is the figure a tax return would show. Economic profit subtracts the implicit costs as well: 200,000 minus 150,000 minus 56,000 gives negative 6,000 dollars. Normal profit for this owner is 56,000 dollars, the accounting profit that would have left economic profit at exactly zero. Because the business earned 50,000 dollars of accounting profit against a normal profit requirement of 56,000, the owner is 6,000 dollars worse off than staying in the old job with the savings in the bank. See /glossary/economic-profit for the full comparison. The figures are illustrative.
Normal profit behaves like a cost even though the word profit sits inside it
The vocabulary trips students because normal profit is filed under profit but functions as a cost. Economists treat the owner's time and capital as inputs the firm must pay for, exactly like electricity, and the payment happens to take the form of retained earnings rather than an invoice. Once you accept that, the long run story falls into place. A competitive industry where firms earn positive economic profit attracts entrants, and entry pushes prices down until economic profit reaches zero. Zero economic profit is not a disaster and does not mean owners are working for nothing. It means each owner is earning normal profit, which is precisely enough to match what their time and money could earn elsewhere, so nobody has a reason to leave and nobody outside has a reason to enter. The difference between the two terms on this page is one of direction. Implicit costs are the individual amounts given up, item by item. Normal profit is the total of those amounts restated as the return the business has to deliver. See /micro/perfect-competition for how zero economic profit closes the long run equilibrium.
Frequently asked questions
Is normal profit the same as implicit cost?
They are the same quantity of dollars viewed from opposite sides, since normal profit is the return that exactly covers a firm's implicit costs. Implicit costs describe the individual opportunities the owner gave up, and normal profit restates their total as the minimum the business must earn.
Why is normal profit counted as a cost?
Because the owner's time and money have alternative uses, and the firm has to match what those alternatives would pay or the owner will take them elsewhere. Treating that required return as a cost is what makes economic profit measure whether the business beats its next best option.
Can a firm report an accounting profit and still be losing money?
Yes, whenever accounting profit is smaller than the firm's implicit costs, which gives a negative economic profit. The owner is then better off closing and moving those resources to the alternative that was passed up.
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