What are a double-entry system and a single entry system?

A double-entry system is a system of bookkeeping where every entry to an account requires a corresponding and opposite entry to a different account. This system gets its name because each transaction is entered twice, once as a debit and once as a credit. The double-entry system has two equal and corresponding sides known as debit and credit.

Here are the steps of how it works:

1. Identify the accounts that are affected by the transaction.
2. Determine the amount of the transaction.
3. Decide which account will be debited and which will be credited.
4. Record the transaction in the appropriate accounts with both a debit and a credit.
5. Ensure that the sum of debits equals the sum of credits.

On the other hand, a single-entry system is a system of bookkeeping in which each transaction is recorded only once. Most often, it is recorded as an entry in a revenue or expense account. The single-entry system is simpler and less time-consuming than the double-entry system but provides less detailed information about the company's financial state.

Here are the steps of how it works:

1. Identify the transaction and decide whether it's an income or an expense.
2. Record the transaction in the appropriate account.
3. Keep track of all transactions in a single record.

In summary, the double-entry system provides a more detailed and accurate picture of a company's financial health, while the single-entry system is simpler and easier to use but provides less information.