Balance of Trade Definition: Surplus, Deficit, and How the Figure Is Measured

Short answer

• The balance of trade is the difference between the value of a country's exports and the value of its imports over a stated period, usually a month, a quarter, or a year. In symbols, balance of trade equals exports minus imports. When exports are larger, the result is positive and the country has a trade surplus. When imports are larger, the result is negative and the country has a trade deficit. When the two values are equal, trade is balanced for that period. That short definition leaves out one detail that causes much confusion. Different reports use the phrase in two ways. Some use it for goods only, which is also called the merchandise trade balance. Others use it for goods and services combined. Before you compare two figures, always check which version you are looking at, and over which period it was measured.

What the Balance of Trade Means

At its simplest, the balance of trade answers one question: in a given period, did a country sell more to the rest of the world than it bought from the rest of the world, when both sides are measured in money terms? The answer is a flow, not a stock. A flow is measured over time, like income earned in a year. A stock is measured at a point in time, like the amount in a bank account on a given date. A surplus in one year does not mean that a country holds a fixed pile of surplus wealth, and a deficit in one year does not by itself mean that a country is out of money.

The US Bureau of Economic Analysis, known as the BEA, defines the balance on goods and services as the difference between exports of goods and services and imports of goods and services. In the broad sense, this balance is conceptually equal to net exports of goods and services, which is a component of gross domestic product, or GDP. Exports are goods and services sold by US residents to foreign residents, and imports are goods and services purchased by US residents from foreign residents. Trade statistics follow residence, meaning who is buying and selling, rather than citizenship or the physical location of a factory alone. The balance is usually expressed in the currency of the country concerned: dollars for the United States, pounds sterling for the United Kingdom, and euros for the European Union. Exchange rate movements can therefore change a balance measured in one currency even when quantities shipped have not changed.

The formula

Balance of trade equals value of exports minus value of imports.

If exports are 500 billion dollars and imports are 450 billion dollars in the same period, the balance is positive 50 billion dollars, a surplus of 50 billion dollars. If exports are 450 billion dollars and imports are 500 billion dollars, the balance is negative 50 billion dollars, a deficit of 50 billion dollars. The sign does the work. Positive means surplus. Negative means deficit. Zero means balanced trade for that period and that definition.

Three cautions belong with the formula. First, exports and imports must cover the same period and scope: you cannot subtract a monthly goods figure from an annual goods and services figure and expect a meaningful result. Second, the values are money values, not counts of containers or tons: a country can export fewer physical items but still record a larger export value if prices rise. Third, the formula alone says nothing about why the balance took that value. It is a measurement, not an explanation.

Trade Surplus, Trade Deficit, and Balanced Trade

A trade surplus, sometimes called a positive trade balance or a favorable balance of trade in older writing, means that exports exceeded imports in the period measured. A trade deficit, sometimes called a negative trade balance or an unfavorable balance of trade in older writing, means that imports exceeded exports. Balanced trade means that exports and imports were equal.

The older words favorable and unfavorable deserve a warning. They come from mercantilist thinking, discussed later in this article, which treated a surplus as good and a deficit as bad by definition. Modern economists generally do not use those labels as judgments: a fast growing economy may import a great deal of machinery because its businesses are expanding, while a country in recession may import very little because spending is low. Neither case can be judged from the trade balance alone.

Result	What it means	Sign
Trade surplus	Exports are greater than imports	Positive
Balanced trade	Exports equal imports	Zero
Trade deficit	Imports are greater than exports	Negative

A country can run a surplus with one partner and a deficit with another, so a bilateral figure, meaning trade with one country only, never tells the whole story.

Goods, Services, and the Merchandise Trade Balance

The largest source of confusion about the balance of trade is scope. Keep these versions distinct.

Goods only: the merchandise trade balance

The merchandise trade balance, also called the balance on goods, covers physical items that cross borders: cars, machinery, oil, grain, clothing, electronics, and similar products. The BEA defines the balance on goods as the difference between exports of goods and imports of goods. This is the narrowest common use of the phrase balance of trade, and it is the version most often reported in short news items, because goods data are collected through customs systems and arrive relatively quickly.

Older textbooks sometimes called goods trade the visible balance and services trade the invisible balance. Those terms are now dated, because services trade is very real even though it is harder to observe.

Goods and services combined

The broader version adds services to goods: travel, transport, financial services, insurance, telecommunications, computer and information services, charges for the use of intellectual property, and other business services. The BEA defines services, in this statistical sense, as products that cannot be stored and are consumed at the place and time of their purchase. A tourist spending money abroad is importing a travel service. A foreign student paying tuition is, in trade statistics, an export of an education related service by the host country. A company paying a foreign firm for software support is importing a service. Services trade can change the picture completely: a country may run a deficit in goods and a surplus in services, so the combined balance may be smaller than the goods deficit alone, or may even switch sign. A report that says only “trade deficit” without stating whether services are included is therefore incomplete.

Which definition should you use?

Neither definition is wrong, but they answer different questions. Use the goods only balance for factory output, commodity flows, or customs based trade in physical products. Use the goods and services balance for the broader picture, and for the figure that connects most directly to GDP through net exports. When comparing countries, use the same definition for each. When tracking one country over time, check whether the agency changed its definition or methods, because a break in the series can look like a change in trade when it is really a change in measurement.

Worked Examples: How the Arithmetic Works

The examples in this section are hypothetical. They use round numbers to make the arithmetic transparent. They are not figures for any real country or period, and they should not be quoted as real trade data.

Example A: a goods and services surplus

Suppose that in one year, a country exports goods worth 300 billion dollars and services worth 120 billion dollars (total 420 billion dollars), and imports goods worth 280 billion dollars and services worth 90 billion dollars (total 370 billion dollars). The balance on a goods and services basis is 420 billion dollars minus 370 billion dollars, which equals positive 50 billion dollars. The goods balance alone is 20 billion dollars, and the services balance alone is 30 billion dollars.

Example B: a goods deficit partly offset by a services surplus

Suppose that in one year, a country exports goods worth 400 billion dollars and services worth 180 billion dollars (total 580 billion dollars), and imports goods worth 520 billion dollars and services worth 110 billion dollars (total 630 billion dollars). The goods balance is negative 120 billion dollars, the services balance is positive 70 billion dollars, and the combined balance is negative 50 billion dollars. A headline reporting only the goods deficit would overstate the combined deficit by 70 billion dollars, because it would leave out the services surplus.

Example C: the same trade, measured two ways

Suppose that a country exports 200 billion dollars of goods and 50 billion dollars of services, and imports 230 billion dollars of goods and 10 billion dollars of services. On a goods only basis, the balance is negative 30 billion dollars. On a goods and services basis, exports total 250 billion dollars and imports total 240 billion dollars, so the balance is positive 10 billion dollars. Only the scope changed, and the sign flipped.

A negative balance is written with a minus sign or described as a deficit of a stated amount. Saying “a deficit of 50 billion dollars” and “a balance of negative 50 billion dollars” mean the same thing. Likewise, “a surplus of 50 billion dollars” and “a balance of positive 50 billion dollars” are equivalent.

Where the Balance of Trade Sits: Current Account, Capital Account, and Balance of Payments

The balance of trade sits inside a larger framework called the balance of payments, which records all economic transactions between residents of an economy and the rest of the world over a period. Treating the trade balance as if it were the whole external position of a country is the most common error about trade figures.

The International Monetary Fund’s standard framework, the sixth edition of the Balance of Payments and International Investment Position Manual, published in 2009 and known as BPM6, organizes the balance of payments into three broad accounts: the current account, the capital account, and the financial account. The current account covers goods, services, primary income, and secondary income. The capital account covers capital transfers and the acquisition or disposal of nonproduced, nonfinancial assets. The financial account covers transactions in financial assets and liabilities, including direct investment, portfolio investment, financial derivatives, other investment, and reserve assets.

The balance of trade, on a goods and services basis, is the goods part plus the services part of the current account. Primary income includes compensation of employees and investment income, such as dividends and interest earned on assets held abroad. Secondary income includes transfers that are not capital transfers, such as remittances sent home by workers abroad and foreign aid. The current account balance is therefore the trade balance plus the primary income balance plus the secondary income balance. A country can have a trade deficit and a current account surplus, or the reverse, if the income and transfer balances outweigh the trade balance.

The financial account records how any current and capital account imbalance is financed. In broad terms, a current account deficit must be matched, in the accounting sense, by net borrowing from abroad or by selling assets to foreigners, while a current account surplus corresponds to net lending abroad or accumulating claims on foreigners. This is an accounting identity, not a judgment that borrowing is good or bad. The overall balance of payments is built on double entry accounting, so in principle it sums to zero, but timing differences, valuation differences, and gaps in source data create a residual item called net errors and omissions. That item is a reminder that trade statistics are estimates built from many sources, not a single perfectly observed ledger.

How Trade Figures Are Measured

Trade figures feel precise because they are published to the nearest million dollars, but they are compiled from many sources and revised over time. For goods, the starting point is customs and administrative data: importers and exporters file documents when merchandise crosses the border. In the United States, merchandise importers and exporters file monthly documents with the Census Bureau, which provides the basic data, while the BEA carries out surveys to measure trade in services, which can happen over a telephone line or a computer network without any physical goods being shipped. The BEA then cross checks the information against other available data, including data collected by other countries on their trade with the United States.

For services, measurement is harder, because there is no customs checkpoint for a phone call or a consulting report. Agencies therefore rely on surveys of businesses and households, reports from banks, and administrative sources. Eurostat notes the same pattern for the European Union: goods data are generally based on statistics collected by customs administrations, while services data come from a variety of surveys, with data reported either by banks or directly by enterprises or households. Services estimates are therefore more likely to be revised as fuller survey responses arrive.

Several measurement choices affect the published balance. Monthly figures bounce around because of holidays, weather, shipping schedules, and one off large shipments. Seasonally adjusted figures remove regular seasonal patterns, but they are still estimates and can be revised. Annual figures are more stable, but they arrive later. Customs values, insurance, and freight can be treated differently across sources, so comparing a customs based figure with a balance of payments based figure without checking the valuation basis can create a false gap. A shipment recorded in one month by the exporter may be recorded in the next month by the importer, so bilateral balances often fail to mirror each other exactly. First estimates use incomplete survey returns and modeled values, and later releases replace them with fuller data. Revision is part of the process, and it is one more reason to avoid strong conclusions from a single month. Trade also follows residence and change of ownership, not simply physical movement: goods bought abroad and resold abroad without entering the home country, known as merchanting, are treated under BPM6 as net exports of goods under merchanting.

When you read a trade release, check five things: scope, period, seasonal adjustment, first estimate or revision, and bilateral versus total balance.

What Moves the Balance of Trade

Many forces move exports and imports, and they often move at the same time. The following are influences, not a recipe for predicting the next release.

Incomes at home and abroad. When domestic incomes rise, households and businesses tend to buy more, including more imports. When incomes abroad rise, foreign buyers tend to buy more exports. A country growing faster than its trading partners will therefore often see its balance move toward deficit, simply because its imports grow faster than its exports.

Prices and exchange rates. If a country’s currency strengthens, its exports become more expensive in foreign currency terms and its imports become cheaper in domestic currency terms, which tends to push the balance toward deficit, other things being equal. If the currency weakens, the reverse tends to happen, although existing contracts and the time needed to find new suppliers mean that the full effect can take months to appear. Price changes for key commodities, especially energy, can also move the goods balance sharply without any change in quantities traded.

Productivity and comparative advantage. Over longer periods, what a country is relatively good at producing shapes its trade pattern. If labor costs rise in labor intensive industries, production of those goods may shift to countries where labor is cheaper. The Federal Reserve Bank of St. Louis, in a 2018 analysis of the roots of the US trade deficit, links the shifting of comparative advantage to the reallocation of labor intensive manufacturing from the United States to nations with cheaper labor.

Saving and investment. At the level of national accounting, net exports equal national saving minus investment. The Federal Reserve Bank of St. Louis states this identity plainly: a nation runs a trade deficit when saving is less than investment, and a trade surplus when saving is greater than investment. This reminds readers that a trade balance is connected to domestic saving and investment decisions, not only to trade policy.

Trade policy. Tariffs, quotas, and other restrictions can raise the price of imports and shift purchases toward domestic or third country suppliers. Encyclopaedia Britannica notes that tariffs are a type of tax on imported goods that typically result in higher retail prices for consumers. A tariff on one partner’s goods may simply shift imports to another partner, leaving the total balance little changed.

Common Misconceptions

A trade deficit does not mean a country is losing money or going bankrupt. A deficit means that, in the period measured, the value of imports exceeded the value of exports. The difference must be financed in the accounting sense, for example by borrowing from abroad or by selling assets, but financing a deficit is a normal part of international finance. Whether that borrowing is sustainable depends on what it funds, on interest costs, and on growth, not on the mere existence of a deficit.

A trade surplus is not automatically a sign of economic strength. A surplus can reflect strong export industries, but it can also reflect weak domestic demand, so that imports are low because spending is low. Encyclopaedia Britannica makes a related point: a continuing surplus may represent underutilized resources that could otherwise be contributing toward a country’s wealth. A surplus accumulated by one country must, in global accounting, correspond to deficits elsewhere, so not every country can run a surplus at the same time.

A bilateral deficit does not mean trade with that country is unfair. Countries specialize, so a bilateral deficit with an electronics producer and a bilateral surplus with an aircraft buyer can both arise from specialization, without any unfair practice. Supply chains also distort bilateral balances: a product assembled in one country may contain parts made in several others, but customs statistics often credit the full value to the final assembly country.

A trade deficit does not automatically cause job losses. Trade can displace workers in particular industries, and that displacement is real for the people affected. But at the level of the whole economy, employment is driven mainly by overall demand, productivity, and labor market institutions, not by the trade balance alone. The Federal Reserve Bank of St. Louis analysis cited above finds that declining US manufacturing employment is more closely linked to rapid technology growth and rising labor productivity than to the trade deficit, and notes that the decline began in the 1960s, while US trade deficits have run since the 1970s.

The balance of trade is not the budget deficit or the national debt. The trade deficit concerns exports and imports. The budget deficit concerns government revenue and spending. The national debt is the accumulated stock of past government borrowing. A country can have a trade deficit and a budget surplus, or a trade surplus and a budget deficit. Likewise, the phrase balance of trade does not mean that exports and imports are in balance with each other. It is the name of the measurement itself, which can be positive, negative, or zero.

A Brief History of the Idea

The idea of a favorable balance of trade dominated European economic thinking from the 16th century to the 18th century, under the doctrine known as mercantilism. Encyclopaedia Britannica explains that, under mercantilism, a favorable balance was seen as a necessary means of financing a country’s purchase of foreign goods and maintaining its export trade, to be achieved in part by establishing colonies that would buy the products of the mother country and export raw materials, particularly precious metals, then considered an indispensable source of wealth and power.

Classical economists in the late 18th century challenged that view. Adam Smith and others argued that free trade is more beneficial than the protectionist tendencies of mercantilism, and that a country need not maintain an even exchange or build a surplus. In this view, trade is valuable because it allows countries to specialize and to consume more than they could produce alone, not because it accumulates a surplus. The modern statistical meaning developed alongside national accounting in the 20th century, when the balance of trade was placed inside the current account and the balance of payments. The IMF’s BPM6 framework, published in 2009, is the framework used for the statistics currently published; the IMF released BPM7 on 20 March 2025, with implementation targeted for 2029 to 2030. For the United States, the modern pattern is long running: the Federal Reserve Bank of St. Louis notes that persistent and growing US trade deficits emerged a few years after the end of the Bretton Woods system in the early 1970s, when the US dollar became the global currency and US government securities became the most demanded foreign reserve asset in the world.

How to Read a Trade Headline

Use this checklist whenever a new trade figure appears in the news: does it say goods only or goods and services; what period does it cover, and is it seasonally adjusted; is it a first estimate likely to be revised; is it bilateral or total; what changed, exports, imports, or both; how does it compare with the same period a year earlier; and what do the current account and the financial account show? A one month change rarely proves that a single policy, event, or country caused the move.

Frequently Asked Questions

What is the balance of trade in simple terms?

It is exports minus imports, measured in money terms over a stated period. A positive result is a trade surplus. A negative result is a trade deficit. A result of zero means balanced trade for that period and definition.

Does the balance of trade include services?

It depends on the definition being used. Some reports use balance of trade for goods only. Others use it for goods and services combined. The BEA publishes both a balance on goods and a balance on goods and services. Always check which one a report is using before comparing figures.

What is the formula for the balance of trade?

Balance of trade equals value of exports minus value of imports, for the same period and the same scope. On a goods and services basis, total exports and total imports each include both goods and services.

What is the difference between the balance of trade and the balance of payments?

The balance of trade covers exports minus imports, usually of goods, or of goods and services. The balance of payments is the complete record of all economic transactions between residents of an economy and the rest of the world, organized into the current account, the capital account, and the financial account. The balance of trade sits inside the current account, so the balance of payments is much broader.

What is the difference between the balance of trade and the current account?

The current account includes the balance of trade plus primary income (investment income and compensation of employees) plus secondary income (remittances and foreign aid). The balance of trade is therefore only one part of the current account.

Why do two sources sometimes report different trade balances for the same country?

They may use different scopes, periods, seasonal adjustment, valuation bases, or revision vintages. Bilateral figures can also differ because exporters and importers record the same shipment in different months or value it differently. Check scope, period, and vintage before concluding that one source is wrong.

Where can I find official trade figures for the United States?

The BEA and the Census Bureau publish US international trade statistics, including the balance on goods, the balance on goods and services, and the full current account. Use the latest release, and note whether the figure is a first estimate or a revision.

Keep reading: How Do Tariffs Affect the Economy?

Sources & references

• US Bureau of Economic Analysis, Glossary: Balance on goods and services; Balance on goods; Exports of goods and services; Imports of goods and services; Net exports of goods and services. Accessed 1 November 2026. https://www.bea.gov/help/glossary?title_1=All&title=imported+services
• Encyclopaedia Britannica, Balance of trade, updated 8 April 2025. Accessed 1 November 2026. https://www.britannica.com/money/balance-of-trade
• Federal Reserve Bank of St. Louis, Brian Reinbold and Yi Wen, Understanding the Roots of the US Trade Deficit, Regional Economist, Third Quarter 2018. Accessed 1 November 2026. https://www.stlouisfed.org/publications/regional-economist/third-quarter-2018/understanding-roots-trade-deficit
• Eurostat, Balance of payment statistics: background, Statistics Explained, describing the IMF sixth edition Balance of Payments and International Investment Position Manual (BPM6, 2009) and the current, capital, and financial accounts. Accessed 1 November 2026. https://ec.europa.eu/eurostat/statistics-explained/index.php?title=Balance_of_payment_statistics_-_background
• OpenStax, Principles of Economics 2e, 23.1 Measuring Trade Balances, Clear It Up: How does the US government collect trade statistics? Accessed 1 November 2026. https://openstax.org/books/principles-economics-2e/pages/23-1-measuring-trade-balances