Definition
The shutdown point is the minimum price at which a business should continue operating in the short run rather than halting production. Specifically, it occurs at the lowest point of average variable cost (variable cost divided by output). As long as the selling price stays above this level, continuing production loses less money than shutting down, even if the business is running at an accounting loss.
Some Costs Never Stop, Even with the Lights Off
Imagine a tofu factory. Each block of tofu sells for 1,200 won (about $0.90). The extra cost required to make just one more block—soybeans, electricity, and packaging—totals 900 won. Expenses that rise and fall with production volume like this are called variable costs.
However, certain bills must be paid every month even if the factory produces zero blocks of tofu. These include building rent and interest on loans, which are known as fixed costs. Even if the boilers are shut off, these expenses arrive without fail. Non-cash accounting deductions, such as the depreciation of aging equipment, also count as fixed costs.
Selling one block takes 900 won to produce and leaves 300 won. This 300 won goes directly toward covering fixed costs. If the boilers never fire up, no raw ingredients are bought, but not a single penny is earned toward paying rent either. That is why production lines keep humming along even in months that finish deep in the red.
If the market price of tofu plunges below 900 won, the situation flips. Selling a block fails to cover even the basic ingredients, meaning every extra block produced simply expands the loss. At that moment, turning off the machines loses less money. This critical crossroads is the shutdown point.
It Is Not the Same as the Break-Even Point
We must separate the shutdown point from the break-even point. The break-even point covers total costs, including fixed overhead, while the shutdown point covers only variable costs. Because they target different costs, these two benchmarks sit at entirely different price levels for the exact same business.
Let's follow the numbers. Suppose monthly fixed costs are 3,000,000 won (around $2,250), and each block generates a 300 won margin over variable costs. The factory must sell 10,000 blocks each month to completely cover those fixed costs. At a price of 1,200 won, 10,000 units is the break-even volume. Sell any fewer, and the books record an accounting loss.
Now imagine a slow month where the factory sells only 5,000 blocks. Gathering 300 won per block brings in 1,500,000 won. Had the factory stayed shut, it would have eaten the entire 3,000,000 won fixed bill alone. By staying open, the net loss shrinks to 1,500,000 won. It is still a loss, but a far smaller loss.
The price range between average variable cost and average total cost is the zone where running at a loss is better than shutting down. Average total cost fluctuates with production volume; in a month where 5,000 blocks are sold, total cost per block is 1,500 won, placing this operating zone between 900 won and 1,500 won. The decision to run or shut down depends on price, not volume: as long as price exceeds variable cost, operating beats idling regardless of output. Profitability, on the other hand, depends on total units sold. When headlines report that factories are operating below cost, the cost they mean is almost always total cost, including fixed overhead.
A Closer Look: The Conditions Behind the Math
This calculation hinges on one essential premise: it applies only to the short run, where fixed costs cannot be cut immediately. Over the long run, leases expire and machinery can be sold off, transforming fixed expenses into avoidable costs. Over that longer horizon, the question returns to whether total costs are covered, not just variable costs.
Temporarily pausing operations is also entirely different from closing a business. Shutting down means idling the line for a period, not liquidating equipment. Permanently exiting an industry involves massive one-time expenses for severance and demolition, and the first firm to leave simply surrenders its market share to surviving competitors. Across an entire industry, this often leads companies to stall and delay capacity cuts.
It is also easy to confuse this logic with the sunk cost fallacy. A sunk cost is money already spent that cannot be recovered, and throwing good money after bad out of regret is the sunk cost fallacy. Operating an unprofitable line, by contrast, deliberately ignores unrecoverable fixed costs and compares only future cash outflows with future cash inflows. While both scenarios involve losing money, this decision is the exact opposite of falling victim to sunk costs.
Finally, the physical nature of equipment matters. If restarting a facility requires immense capital and time, those restart costs must be factored in. Facilities like steel blast furnaces cannot easily shut down even when market prices temporarily fall below variable costs.
Common misconceptions
Whenever a business runs at a loss, shutting down is always the best move.
As long as the selling price covers variable costs, the remaining revenue helps pay down fixed costs. Continuing production minimizes total losses compared to shutting down completely.
The shutdown point and the break-even point are two names for the same price level.
The break-even point covers total costs including fixed overhead, whereas the shutdown point covers only variable costs. Between these two points lies a zone where operating at a loss is better than shutting down.
Where you meet it
A tofu factory turning off its boilers for a few months when tofu prices fall below the cost of soybeans and electricity, because producing each extra block only deepens the deficit.
A ski resort shutting down its chairlifts during warm seasons because lift ticket revenue would not even cover the electricity and staffing costs required to run them.
In one sentence
As long as market price covers variable costs, operating at a loss is better than sitting idle; only when the price drops below that variable floor does shutting down become the smarter choice.