Description
The most basic identity in accounting is that the balance sheet must balance, that is, that assets must equal the equities, including liabilities (aka debts) and equity, aka the owner's interest). In its most common formulation it is known as the accounting equation:
- Assets = Debt + Equity
where debt includes non-financial liabilities. Balance sheets are commonly presented as two parallel columns, each summing to the same total, with the assets on the left, and the equities (including liabilities) on the right. The parallel columns of Assets and Equities are, in effect, two views of the same set of business facts.
The balance of the balance sheet reflects the conventions of double-entry bookkeeping, by which business transactions are recorded. In double-entry bookkeeping, every transaction is recorded by paired entries, and typically a transaction will result in two or more pairs of entries. The sale of product, for example, would record both a receipt of cash (or the creation of a trade receivable in the case of an extension of credit to the buyer) and a reduction in the inventory of goods for sale; the receipt of cash or a trade receivable is an addition to revenue, and the reduction in goods inventory is an addition to expense (an "expense" is the "expending" of an asset, in this case, the inventory). Thus, there are two pairs of entries: an addition to revenue balanced by an addition to cash; a subtraction from inventory balanced by an addition to expense. The cash and inventory accounts are asset accounts; the revenue and expense accounts will close at the end of the accounting period to affect equity.
Double-entry bookkeeping conventions are employed as well for the National Accounts, so the definition and measurement of important economic concepts, such as national product, aggregate income, investment and savings, as well as the balance of payments and balance of trade, involve accounting identities. At base, the application of double-entry bookkeeping conventions to the problems of measuring aggregate economic activity derives from the recognition that every purchase is also a sale, every payment made is also income received, and every act of lending also an act of borrowing.
This usage of the term identity is similar to the concept of a mathematical identity or a logical tautology, since it defines an equivalence, which does not depend on the particular values of the variables.
Read more about this topic: Accounting Identity
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