The Balance of Payments (BOP) accounts is a record of all the economic transactions between a country and the rest of the world over a specific period of time. It is a systematic record of all the financial transactions that take place between the residents of a country and the rest of the world.

The BOP accounts are divided into three main categories:

1) Current Account: The current account records all the transactions related to trade in goods and services, income flows, and transfers between the country and the rest of the world. This includes exports and imports of goods, services, and income flows such as dividends, interest, and wages.

2) Capital Account: The capital account records all the transactions related to the transfer of financial assets and liabilities between the country and the rest of the world. This includes foreign direct investment, portfolio investment, and other capital flows.

3) Financial Account: The financial account records all the transactions related to the purchase and sale of financial assets and liabilities between the country and the rest of the world. This includes transactions in foreign currencies, foreign exchange reserves, and other financial assets.

The balance of payments is said to be in equilibrium when the sum of the current account, capital account, and financial account balances is zero. If the current account is in surplus, it means that the country is exporting more than it is importing, and if the current account is in deficit, it means that the country is importing more than it is exporting. The balance of payments is an important indicator of a country's economic health and its international economic relations.