Originary Interest in Mises’s theory expresses differences in valuing satisfaction available at different times. In markets it appears as a discount of future goods. This is an analytical concept of the Austrian school, not a directly observable quoted item or one psychological percentage shared by everyone.
Mises defines originary interest as a valuation ratio, not a separate price for capital services. A machine’s productivity influences its price; it does not by itself explain time discounting. Separate what equipment will produce from when the output will become available. [Mises — Human Action, XIX]
Rothbard examines a producer who pays for inputs before selling the product. Time valuation also applies when using one’s own funds. Having no loan contract therefore does not remove the wait; related income in an actual business nevertheless remains uncertain. [Rothbard — Many Stages: The Pure Rate of Interest]
Our simplified illustration of Rothbard’s account: spending 100 today and receiving 105 in a year gives a difference of 5, or 5% of the outlay. This illustrates a calculation, not a measurement of pure originary interest. Without specifying uncertainty, costs and maturity, it cannot be compared with another project. [Rothbard — Many Stages: The Pure Rate of Interest]
Mises distinguishes time discounting from profits and losses arising through changing conditions and their anticipation. A higher selling price after unexpectedly stronger demand is therefore not entirely originary interest. A failed project can likewise lose principal even though people distinguish earlier from later satisfaction. [Mises — Human Action, XIX]
Mises’s chapter twenty distinguishes an entrepreneurial component and a price premium associated with expected purchasing-power changes within gross market interest. This is not a recipe for subtracting two known numbers mechanically: the components are not separately measured on the contract, and expectations can fail. [Mises — Human Action, XX]
Our example: a promised nominal 2% with subsequent inflation of 4% gives roughly negative 2% in real terms, if the debt is repaid. This uses inflation known afterward; it is not direct evidence of negative Originary Interest. Mises explicitly separates gross yield, price changes and credit failure. [Mises — Human Action, XX]
Mises and Rothbard use an evenly rotating economy without unexpected changes to isolate interest from entrepreneurial profit and loss. The same pure rate in this construct does not mean identical observed percentages on all loans. Restore risks and changing conditions when taking the conclusion back to reality. [Mises — Human Action, XIX] [Rothbard — Many Stages: The Pure Rate of Interest]
Nakamoto’s text describes payment verification and the double-spending problem. It does not imply automatic growth of BTC holdings. This is our application of the money–credit distinction: an offer of yield for lending Bitcoin adds a contract and counterparty; its rate alone does not reveal the pure time discount. [Nakamoto — Bitcoin: A Peer-to-Peer Electronic Cash System] [Mises — Human Action, XX]
For the clearest picture, read this entry together with Natural Rate of Interest, Time Preference, Capital Goods, Economic Calculation, Malinvestment. The reverse links also lead from Natural Rate of Interest.