Balance of payments

The balance of payments (BOP) is a country's comprehensive accounting statement of its transactions with the rest of the world. Every cross-border flow — exports, imports, investment income, foreign aid, purchases of foreign assets — is recorded somewhere in the BOP. Because it uses double-entry bookkeeping, the accounts must balance overall: a deficit in one account is offset by a surplus in another.

The BOP has two main components. The current account records trade in goods and services, income earned from foreign investments, and one-way transfers such as remittances and foreign aid. The capital and financial accounts record cross-border purchases of assets — foreign direct investment, and purchases of stocks, bonds, and other financial claims. A country running a current account deficit, like the United States, finances it with a matching financial account surplus as foreigners buy its assets.

The balance of payments matters because it links trade, exchange rates, and capital flows. A widening trade deficit tends to put downward pressure on a country's currency, while strong foreign investment inflows support it. Policymakers watch the BOP to gauge external imbalances, and persistent deficits can signal that a country is borrowing heavily from abroad.

The AP Macroeconomics exam tests the balance of payments in its open economy unit — expect questions on classifying transactions into the correct account and on the identity that the current account and the capital and financial accounts sum to zero. The CGMA business economics syllabus covers the same framework alongside protectionism and international trade policy.