Accounting profit is a firm's total revenue minus its explicit (out-of-pocket) costs only. In AP Micro (Topic 3.4), it matters mostly as a contrast: it ignores implicit costs like the owner's time and forgone investment returns, so firms make decisions based on economic profit, not accounting profit.
Accounting profit is what shows up on a firm's financial statements. Take total revenue and subtract explicit costs, meaning the bills the firm actually pays (wages, rent, materials, utilities). That's it. Accounting profit = Total Revenue − Explicit Costs.
The AP exam cares about what accounting profit leaves out. Per EK CBA-2.C.2, accounting profit fails to account for implicit costs, things like the cost of financial capital, compensation for risk, and the value of an entrepreneur's time. Those are real costs because they're forgone opportunities. Subtract implicit costs too and you get economic profit, which is always less than or equal to accounting profit. When economic profit equals zero, the owner is earning exactly enough to cover all opportunity costs. That's called normal profit, and it's a perfectly fine outcome, not a failure.
Accounting profit lives in Unit 3: Production, Cost, and the Perfect Competition Model, specifically Topic 3.4 (Types of Profit). It supports learning objectives AP Micro 3.4.A (define the types of profit), 3.4.B (explain how firms respond to profit opportunities), and 3.4.C (calculate profit or loss). The single most testable fact comes straight from EK CBA-2.C.1: firms respond to economic profit (or loss), not accounting profit. That one sentence drives everything later in Unit 3, because entry and exit in perfectly competitive markets are triggered by economic profit. A firm can have positive accounting profit and still exit the industry if its economic profit is negative, because the owner could earn more doing something else. If you only learn one thing about accounting profit, learn that it's the wrong number for predicting firm behavior on this exam.
Keep studying AP Microeconomics Unit 3
Economic Profit (Unit 3)
Economic profit is accounting profit minus implicit costs. Think of accounting profit as the gross number and economic profit as the honest number, the one that asks 'could you have done better with your time and money elsewhere?' AP questions almost always test these two side by side.
Explicit Costs (Unit 3)
Explicit costs are the only costs accounting profit subtracts. If a cost involves money actually leaving the firm, it counts here. If it's a forgone opportunity (the salary you gave up, interest your savings could have earned), accounting profit ignores it entirely.
Long-Run Equilibrium in Perfect Competition (Unit 3)
In long-run equilibrium, firms earn zero economic profit but positive accounting profit. The accounting profit is exactly covering implicit costs, which is normal profit. This is why 'zero economic profit' doesn't mean firms are broke. It means they're earning just enough to stay.
Average Total Cost (ATC) (Unit 3)
The cost curves you graph in Topic 3.2 include both explicit and implicit costs, so when price equals ATC on an AP graph, the firm earns zero economic profit, not zero accounting profit. The graphs are built on the economist's definition of cost, not the accountant's.
Accounting profit shows up most often in MCQs that test the accounting vs. economic profit distinction. Classic stems give you total revenue, explicit costs, and implicit costs (often dressed up as 'the salary she gave up' or 'interest forgone on savings invested in the business') and ask you to calculate both types of profit or decide whether the owner should stay in business. Practice questions also hit the conceptual side, like 'what type of profit occurs when total revenue equals total cost?' (normal profit, meaning zero economic profit) and 'how does an owner's time affect the difference between accounting and economic profit?' On FRQs, the term shows up through economic profit. The 2023 FRQ Q1, for example, gave a perfectly competitive firm earning positive economic profit and asked what must be true about price and costs. To answer those, you need to know that the profit on AP graphs is economic profit, and that positive economic profit attracts entry. Your job on the exam: calculate both profits from a table, explain why a firm with positive accounting profit might still shut down or exit, and never confuse zero economic profit with earning nothing.
Accounting profit subtracts only explicit costs from total revenue. Economic profit subtracts explicit AND implicit costs. So economic profit is always smaller (or equal, if implicit costs are zero, which basically never happens on the exam). The trap: a firm with $50,000 in accounting profit whose owner gave up a $60,000 salary has an economic profit of −$10,000 and should exit. The exam rewards you for knowing firms respond to the economic number (EK CBA-2.C.1), not the accounting one.
Accounting profit equals total revenue minus explicit costs only, the out-of-pocket expenses a firm actually pays.
Accounting profit ignores implicit costs like the entrepreneur's time, forgone interest on financial capital, and compensation for risk (EK CBA-2.C.2).
Firms make entry, exit, and production decisions based on economic profit, not accounting profit (EK CBA-2.C.1).
Economic profit is always less than or equal to accounting profit, because it subtracts implicit costs on top of explicit ones.
Zero economic profit means the firm earns normal profit, which is a positive accounting profit just big enough to cover all opportunity costs.
On AP graphs, the cost curves include implicit costs, so the profit rectangle you shade is economic profit, not accounting profit.
Accounting profit is total revenue minus explicit costs, the direct out-of-pocket expenses like wages, rent, and materials. It's the profit a firm reports on financial statements, and it appears in Topic 3.4 (Types of Profit) of Unit 3.
No. Zero economic profit means accounting profit exactly equals implicit costs, so the owner earns a normal profit. A firm in long-run perfectly competitive equilibrium has zero economic profit but positive accounting profit, and it has no reason to leave the industry.
Accounting profit subtracts only explicit costs from total revenue, while economic profit subtracts both explicit and implicit costs. So if a firm earns $80,000 in accounting profit but the owner gave up a $100,000 job, economic profit is −$20,000 and the rational move is to exit.
Because economic profit counts opportunity costs. A positive accounting profit can hide the fact that the owner's money and time would earn more elsewhere. The CED states this directly in EK CBA-2.C.1: firms respond to economic profit or loss, not accounting profit.
Economic profit. The ATC curve on AP graphs already includes implicit costs, so when price is above ATC the shaded rectangle is positive economic profit, and when price equals ATC the firm earns zero economic profit (normal profit).