Updated for the 2026-2027 CFA® Level I curriculum.
A firm decides how much to produce by comparing revenue with cost at each output level. Two output levels matter most in the short run: the breakeven point and the shutdown point. CFA Level I tests whether you can identify both, explain the decision at each one, and apply the same logic when a firm has price-setting power instead of taking price from the market.
Quick Answer
The breakeven point occurs where total revenue equals total cost, so economic profit is zero. The shutdown point occurs where total revenue equals total variable cost. Below that level, operating losses exceed the loss from shutting down, so the firm should stop production. For a perfectly competitive firm, the breakeven price equals minimum average total cost (ATC) and the shutdown price equals minimum average variable cost (AVC). Between these two points, the firm operates at a loss but still covers variable cost and part of fixed cost.
Key Takeaways
Breakeven means and economic profit equals zero. Accounting profit can still be positive.
Shutdown means . Below this point, producing increases the loss beyond fixed cost alone.
For a price-taking firm, and .
A firm operating between the shutdown price and the breakeven price loses money but should keep producing.
At exactly , the firm is indifferent. The loss equals fixed cost whether it produces or not.
Shutdown is a short-run pause. Exit is a long-run decision to leave the market permanently.
Under imperfect competition, the firm sets output where , then reads price off the demand curve. Price does not equal marginal cost.
What You Need to Know for CFA Level I
Calculate or identify , , , , , and from a data set or short scenario.
Determine whether a firm earns positive, zero, or negative economic profit at a given output.
Use or to locate the breakeven output or price.
Use or to locate the shutdown boundary.
Explain why a firm minimizes its short-run loss by continuing to operate when revenue covers variable cost.
Distinguish a temporary shutdown from a long-run exit decision.
For imperfect competition, find output at , then use the demand curve to get price before checking the operating decision.
What Is the Breakeven Point?
The breakeven point is the output level where total revenue equals total cost. Economic profit is zero. Economic breakeven can still include positive accounting profit because economic cost includes explicit costs, such as wages and materials, plus implicit opportunity costs, such as the return the owner gives up by not investing capital elsewhere. A firm can show positive accounting profit and still sit at economic breakeven, because accounting profit ignores opportunity cost.
Under perfect competition, the firm is a price taker. It maximizes profit at the output where price equals marginal cost. At that output, if price also equals minimum ATC, the firm breaks even. This gives you a fast way to read a graph: find where the ATC curve reaches its lowest point. That price is the breakeven price for a price-taking firm.
What Is the Shutdown Point?
The shutdown point guides a short-run production decision. The firm compares revenue with variable cost, while a long-run exit decision considers whether the business can recover all costs over time.
If revenue covers variable cost and contributes something toward fixed cost, the firm should keep producing. Losing part of fixed cost is better than losing all of it. If revenue falls below variable cost, producing makes the loss larger than simply shutting down and absorbing fixed cost alone. At that point, the firm should stop production.
At the exact shutdown boundary, where , the firm is indifferent. The loss equals fixed cost either way. At the shutdown price, both choices produce the same loss, so the firm is indifferent between operating and pausing production.
Fixed costs deserve a careful look here. Some fixed costs are unavoidable in the short run, like a signed lease. Others may be reduced or renegotiated even in the short run. Not every fixed cost is permanently sunk, so treat "fixed" and "sunk" as related ideas, not identical ones.
Breakeven vs Shutdown: The Three Production Decisions
For a price-taking firm, comparing price to ATC and AVC gives a clean decision rule.
Condition | Economic Result | Short-Run Decision | Interpretation |
|---|---|---|---|
Positive economic profit | Operate | Revenue exceeds all costs | |
Zero economic profit (breakeven) | Operate | Revenue exactly covers all costs | |
AVC < P < ATC | Economic loss | Operate | Revenue covers variable cost and part of fixed cost |
Economic loss equal to fixed cost | Indifferent (shutdown point) | Loss is the same whether producing or not | |
Economic loss exceeds fixed cost if operating | Shut down | Revenue does not even cover variable cost |
Price comparisons work cleanly here because a perfectly competitive firm takes price as given. Under imperfect competition, you compare TR to TC and TVC directly, since price varies with output along the demand curve.
Shutdown Point Formula and Breakeven Formula
For a perfectly competitive firm:
Where:
= total revenue
= total cost
= total variable cost
= total fixed cost
= average total cost (TC divided by quantity)
= average variable cost (TVC divided by quantity)
The operating rule follows directly: operate when is greater than or equal to , and shut down when is less than . Treat the equality case as indifference. The firm loses the same amount, equal to fixed cost, whether it produces or not.
How the Decision Works Under Imperfect Competition
A firm with pricing power, such as a monopolist or a monopolistically competitive firm, does not take price as given. It still maximizes profit or minimizes loss at the output where From there, the process changes slightly.
First, find the output where . Second, use the demand curve at that output to find price. Do not assume price equals marginal cost. That relationship only holds under perfect competition.
Third, compare to to determine profit or loss at that output. Fourth, compare to to decide whether the firm should operate or shut down in the short run. The decision rule is identical to the perfectly competitive case. Only the method for finding price differs.
This section stays intentionally brief. Detailed monopolistic competition pricing and output decisions belong on a separate note.
Worked Example
Riverbend Textiles operates a single fabric plant in a perfectly competitive market. At its profit-maximizing output of 10,000 units, price is $42 per unit, ATC is $48 per unit, and AVC is $30 per unit.
Step 1: Calculate total revenue.
Step 2: Calculate total cost.
Step 3: Calculate total variable cost.
Step 4: Calculate economic loss.
Step 5: Calculate fixed cost.
Step 6: Calculate the contribution toward fixed cost.
Riverbend loses $60,000, but it covers all $300,000 of variable cost and contributes $120,000 toward its $180,000 fixed cost. Shutting down would mean losing the full $180,000. Operating cuts that loss to $60,000, so Riverbend should keep producing.
Now suppose the market price drops to $28 per unit.
TVC remains $300,000, since variable cost per unit is unchanged at this output.
Revenue no longer covers variable cost. Producing would add $20,000 in variable losses on top of the $180,000 fixed cost, for a total loss of $200,000. Shutting down limits the loss to $180,000, the fixed cost alone. Riverbend should shut down at this price.
Common Exam Traps
Using ATC instead of AVC for the shutdown decision. The shutdown decision depends only on variable cost coverage. ATC includes fixed cost, which is irrelevant to the short-run operating choice.
Assuming every economic loss requires shutdown. A loss alone does not trigger shutdown. The firm should keep operating as long as revenue exceeds variable cost.
Ignoring the indifference case at P = AVC. At this exact point, the loss is identical whether the firm produces or not. Treat it as indifference, not a forced shutdown.
Confusing short-run shutdown with permanent exit. Shutdown is temporary and reversible. Exit means leaving the industry, which is a long-run decision tied to recovering fixed costs over time.
Treating all fixed costs as permanently sunk. Some fixed costs, like short-term leases or renegotiable contracts, are not truly sunk. Sunk costs cannot be recovered under any circumstance.
Assuming P = MC under imperfect competition. This equality holds only for a price-taking firm. A firm with pricing power sets output at MR = MC, then reads a higher price off the demand curve.
Practice Question
Meridian Software sells a subscription product in a monopolistically competitive market. At its profit-maximizing output, where , the firm generates total revenue of $480,000. Total variable cost at this output is $420,000, and total cost is $530,000. What should Meridian do in the short run?
Shut down immediately, because the firm is operating at an economic loss.
Continue operating, because total revenue exceeds total variable cost.
Exit the market permanently, because total cost exceeds total revenue.
Correct Answer: B
Meridian has an economic loss of $50,000 ( of $480,000 minus of $530,000). But TR exceeds by ), so the firm covers all variable cost and contributes $60,000 toward its $110,000 fixed cost. Shutting down would mean losing the full $110,000 in fixed cost. Operating limits the loss to $50,000, so Meridian should continue producing in the short run.
Option A. This choice mistakes any economic loss for a shutdown signal. The correct trigger is TR falling below TVC, not TR falling below TC.
Option C. Exit is a long-run decision based on whether a firm can recover costs over time. Nothing in this scenario supports a permanent exit conclusion, and the question only asks about the short run.
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FAQs About Breakeven and Shutdown Points of Production
What is the shutdown point formula?
The shutdown point occurs where total revenue equals total variable cost (). For a perfectly competitive firm, this translates to price equal to minimum average variable cost ( ). Below this price, the firm should stop production in the short run.
What is the difference between the breakeven point and shutdown point?
Breakeven occurs where , meaning economic profit is zero. Shutdown occurs where , a lower revenue threshold. Between these two points, the firm operates at a loss but still covers variable cost, so continuing production remains the better choice.
Why would a firm continue producing at an economic loss?
Producing at a loss can still be the best available choice. If revenue covers variable cost and contributes something toward fixed cost, operating loses less money than shutting down and absorbing all fixed cost with zero revenue.
Does shutting down mean a firm permanently exits the market?
No. Shutdown is a temporary, short-run pause in production. The firm still pays fixed costs and can resume if price rises above the shutdown level. Permanent exit is a separate long-run decision based on whether fixed costs can be recovered over time.