Ludwig von Mises prepared Profit and Loss for the 1951 Mont Pelerin Society meeting, and the Mises Institute issued this edition in 2008. An entrepreneur buys inputs at today's prices to sell output at prices nobody yet knows. If he judges future consumer prices better than rivals, he buys factors cheaply relative to the market that later arrives, and his revenue exceeds total cost, interest included. That surplus is profit, and misjudgment produces loss. Both vanish once production catches up with demand and return because conditions keep changing. Its value lies in carrying that mechanism through accounting, taxation and reform proposals in about fifty pages. The closing polemics deserve less weight.
The first payoff is a sharper definition. Corporate dividends, Mises argues, mix interest on capital with profit or loss. The entrepreneur's managerial work earns quasi-wages. A firm controlling a monopoly factor collects monopoly gains, which raise dividends but stay outside profit proper. A high accounting return is therefore ambiguous evidence, consistent with foresight, ordinary interest, salary or protected market power. Entrepreneurship differs from invention: new technology is one adjustment among several, and a producer who adds another familiar machine to meet unmet demand acts as an entrepreneur.
The paper gives government a defined place. Mises calls the protection of life, health and productive effort indispensable and beneficial to all. Because such services carry no market price, he treats budget limits and detailed rules as the necessary check on officials.
His scarcity illustration is hypothetical, and its point is general. An entrepreneur with 100 units of capital puts 50 into good p and 50 into good q, and both lines pay. A critic who asks for 75 in p is asking for only 25 in q. More of one good means less of others, so the complaint blames the entrepreneur for scarcity itself. Mises calls the critic who overrides consumers' rankings a would-be dictator. The arithmetic holds without the label.
Profit changes who directs capital. Entrepreneurs who profit and reinvest command more inputs, and those who lose command fewer. A simplified comparison shows why a high profit rate can register efficiency. A rival who needed twice the capital for the same output would, even setting aside the extra interest, report half the percentage return while tying up capital that other lines could have used. Government contracts that paid production cost plus a fixed percentage reversed that reward, since each avoidable expense enlarged the percentage fee paid on top of it. The discipline depends on private ownership, open entry and the absence of legal privilege. It works by correcting errors repeatedly, and Mises grants that investors often make them.
The accounting pages show how much forecasting sits inside reported figures. Depreciation depends on uncertain future earnings from equipment, so the figure rests on speculative anticipation. An outside expert cannot remove that uncertainty, and the entrepreneur bears any misjudgment. Legal profit serves other purposes. In his account, tax law tends to enlarge the figure to raise revenue, while commercial codes held it down to protect creditors. Inflation adds nominal gains that can turn into losses when restated in sounder money, and he traces much talk of profiteering to that confusion.
The later argument tests the abolition of profit against the goal its advocates claim, better living for non-entrepreneurs, and leaves ultimate values aside. In his analysis, three schemes fail that test. Capping prices at cost leaves more buyers than goods and forces rationing. Handing employees all profits while owners bear all losses would cut saving and lock capital into existing plants. A one hundred percent profits tax turns entrepreneurs into administrators answerable to no buyer. Voluntary cooperatives, negotiated profit sharing and ordinary taxation need their own analysis. Socialization, he argues, seizes a structure built for yesterday's demand while production must be readjusted daily, and a takeover fifty years earlier would have captured a different economy. He calls the evenly rotating economy an indispensable thought tool, and within a broader attack on mathematical economists he faults them for treating that static construction as a description of production amid constant change. He expressly sets aside the full socialist calculation argument.
Mises's case for open entry assumes that anyone who knows how to exploit a business opportunity will always find the capital required. Lenders and borrowers know different things, and financing constraints are real, so we doubt this holds as a universal rule. We add a second limitation: his market plebiscite weights preferences by spending power, so it ranks effective demand without measuring welfare. Treat his 1951 forecast that price controls, union wage pressure and profit taxes would soon abolish profit, his remarks on envy and his anti-communist asides as dated opinion.
Read Profit and Loss for one question: what work does profit do under uncertainty, and what stops when it is removed? Expect a compact conceptual argument that assumes comfort with prices, costs and interest. It does not show that any particular business return was deserved. Human Action and Bureaucracy, both cited in the paper, take the reasoning further. The Mises Institute provides the official text.