Current syllabus: 2026–2028, Version 2 Official syllabus points: 6.3.1–6.3.4
Current Cambridge requirements
This topic must cover:
- the four components of the current account: trade in goods, trade in services, primary income and secondary income;
- the meaning of a current-account balance, deficit and surplus;
- calculations of the goods balance, services balance, trade balance in goods and services, and current-account balance;
- causes of current-account imbalances;
- consequences of current-account imbalances for the domestic and external economy.
The current Cambridge syllabus controls the structure. The older Excel in Economics Unit 6 notes are used only as a secondary teaching and artwork library. They contain useful flow tables and calculation layouts, but also use older labels, extend into the capital and financial accounts, and make some overly automatic claims about exchange rates and adjustment. Those features are corrected here.
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Exam Essentials
1. What is the balance of payments?
The balance of payments is a record of economic transactions between the residents of one economy and residents of the rest of the world during a period.
At AS Level, Topic 6.3 focuses on the current account, not the full capital and financial accounts. The current account records:
- trade in goods;
- trade in services;
- primary income;
- secondary income.
A transaction is normally recorded as a:
- credit when it brings a receipt from abroad into the domestic economy;
- debit when it creates a payment from the domestic economy to the rest of the world.
Examples:
| Transaction | Current-account entry | Sign |
|---|---|---|
| A domestic firm exports machinery | Trade in goods credit | + |
| A household buys an imported car | Trade in goods debit | − |
| A foreign tourist pays for a domestic hotel | Trade in services credit | + |
| A domestic resident pays a foreign airline | Trade in services debit | − |
| A domestic investor receives dividends from abroad | Primary income credit | + |
| A foreign investor receives profits from a domestic firm | Primary income debit | − |
| A worker abroad sends a personal transfer home | Secondary income credit | + |
| The government sends current foreign aid abroad | Secondary income debit | − |
Core trap
The current account records flows during a period. It is not a stock of money, foreign reserves or accumulated debt.
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2. Trade in goods
Trade in goods records exports and imports of physical, movable products where ownership passes between residents and non-residents.
Examples include:
- food;
- vehicles;
- clothing;
- machinery;
- raw materials;
- electronic equipment.
The balance of trade in goods is:
exports of goods − imports of goods
If goods exports are $84 billion and goods imports are $103 billion:
goods balance = 84 − 103 = −$19 billion
The country has a goods deficit of $19 billion.
A negative goods balance does not automatically mean the entire current account is in deficit. A services surplus or positive primary income balance may offset it.
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3. Trade in services
Trade in services records services supplied between residents and non-residents.
Examples include:
- tourism and travel;
- transport and freight;
- banking and insurance;
- legal and consulting services;
- telecommunications and digital services;
- education supplied to foreign students;
- royalties for certain uses of intellectual property.
The balance of trade in services is:
exports of services − imports of services
A foreign visitor buying accommodation is an export of services because a resident producer supplies a service to a non-resident. A domestic resident buying accommodation abroad is an import of services.
If service exports are $62 billion and service imports are $41 billion:
services balance = 62 − 41 = +$21 billion
The country has a services surplus of $21 billion.
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4. Balance of trade in goods and services
The balance of trade in goods and services is:
goods balance + services balance
or directly:
exports of goods and services − imports of goods and services
Using the previous examples:
- goods balance = −$19 billion;
- services balance = +$21 billion.
Therefore:
trade balance in goods and services = −19 + 21 = +$2 billion
The country has an overall trade surplus of $2 billion despite its goods deficit.
Exam trap
Do not use balance of trade as a synonym for the whole current account. The current account also includes primary and secondary income.
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5. Primary income
Primary income records income received or paid in return for providing labour, financial resources or certain non-produced assets across borders.
It includes:
- compensation of employees where the worker and employer are resident in different economies;
- interest from foreign lending or deposits;
- dividends and distributed profits from foreign investment;
- reinvested earnings associated with direct investment;
- rent and some other income connected with non-produced assets.
The primary income balance is:
primary income receipts from abroad − primary income payments abroad
If domestic residents receive $28 billion in interest, profits and compensation from abroad, while non-residents receive $35 billion from the domestic economy:
primary income balance = 28 − 35 = −$7 billion
This may occur even when the trade balance is positive. A country with a large stock of foreign-owned domestic assets may make substantial profit, dividend and interest payments abroad.
Important distinction
The purchase of a foreign asset belongs to the financial account. The interest, dividends or profits earned from that asset belong to primary income in the current account.
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6. Secondary income
Secondary income records current transfers where one party provides economic value without receiving an equivalent good, service or asset directly in return.
Examples include:
- workers’ personal transfers or remittances;
- current international aid;
- gifts between residents and non-residents;
- contributions to or receipts from international organisations;
- some cross-border pensions and social contributions.
The secondary income balance is:
secondary income receipts − secondary income payments
If receipts are $9 billion and payments are $13 billion:
secondary income balance = 9 − 13 = −$4 billion
Primary versus secondary income
| Primary income | Secondary income |
|---|---|
| A return for labour, capital or another productive resource | A current transfer without a direct return |
| Interest, dividends, profits, cross-border compensation | Remittances, gifts, current aid |
| Linked to providing an input or asset use | Redistribution of income |
A remittance should not automatically be called a wage. A wage earned across borders is primary income; the later transfer of personal funds to another household may be secondary income.
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7. Calculating the current-account balance
The current-account balance (CAB) is:
trade in goods balance + trade in services balance + primary income balance + secondary income balance
Equivalently:
total current-account credits − total current-account debits
Full worked example
| Component | Credits | Debits | Balance |
|---|---|---|---|
| Goods | 120 | 150 | −30 |
| Services | 86 | 58 | +28 |
| Primary income | 31 | 39 | −8 |
| Secondary income | 10 | 7 | +3 |
Therefore:
CAB = −30 + 28 − 8 + 3 = −$7 billion
or:
total credits = 120 + 86 + 31 + 10 = 247<br>total debits = 150 + 58 + 39 + 7 = 254<br>CAB = 247 − 254 = −7
The country has a current-account deficit of $7 billion.
Balance, deficit and surplus
- Balanced current account: total credits equal total debits, so CAB = 0.
- Current-account deficit: total debits exceed total credits, so CAB < 0.
- Current-account surplus: total credits exceed total debits, so CAB > 0.
A movement from −$20 billion to −$8 billion is an improvement or narrowing of the deficit, but the account remains in deficit. A movement from +$12 billion to +$5 billion is a deterioration or narrowing of the surplus, but the account remains in surplus.
Comparing countries and time periods
The cash value of a deficit may rise simply because the economy is larger. Analysts often compare:
current-account balance as a percentage of GDP
This is useful for scale, but the syllabus calculations focus on component balances and CAB rather than requiring the ratio formula.
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Causes of current-account imbalances
8. Export competitiveness
A country’s current-account position can be affected by the price and non-price competitiveness of its exports.
Price competitiveness
Export demand may rise when domestic products become cheaper relative to foreign alternatives. Price competitiveness can be affected by:
- domestic inflation relative to trading partners;
- productivity and unit labour costs;
- the exchange rate;
- transport and energy costs;
- tariffs and other trade barriers abroad.
A higher domestic inflation rate than trading partners may raise export prices and make imports relatively attractive, worsening the trade balance. The result is not automatic because firms can absorb costs in profit margins and demand depends on elasticities and quality.
Non-price competitiveness
Exports may rise because of:
- quality;
- reliability;
- design;
- branding;
- after-sales service;
- technological sophistication;
- delivery times;
- access to distribution networks.
A country can maintain strong exports despite relatively high prices if its products are differentiated and highly valued.
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9. Domestic and foreign income
Imports are often positively related to domestic income.
domestic income rises → household and firm expenditure rises → some additional spending goes to imports → import payments rise
A demand boom can therefore widen a current-account deficit, especially where the marginal propensity to import is high or domestic supply cannot meet demand.
Foreign economic growth can increase demand for the country’s exports:
trading-partner income rises → demand for imports from the domestic economy rises → export receipts rise
A recession abroad may reduce export demand even if domestic competitiveness is unchanged.
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10. Exchange-rate changes
A depreciation makes domestic exports cheaper in foreign currency and imports more expensive in domestic currency, other things equal. This may improve the trade balance over time.
However, the result depends on:
- price elasticities of demand for exports and imports;
- the time needed for contracts and consumer behaviour to adjust;
- imported inputs used by exporters;
- the response of foreign competitors;
- whether firms change prices or profit margins.
Topic 6.4 studies the exchange-rate mechanism in detail. In Topic 6.3, the key point is that exchange-rate movements can affect export and import values, but the effect is not guaranteed or instantaneous.
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11. Structural factors and productive capacity
Persistent imbalances may reflect the structure of the economy.
A deficit may be associated with:
- weak productivity growth;
- limited productive capacity;
- dependence on imported energy, food or capital goods;
- a narrow export base;
- poor infrastructure;
- skills shortages;
- low research and development;
- declining industries;
- strong domestic consumption relative to saving.
A surplus may be associated with:
- a large competitive manufacturing or services sector;
- high national saving relative to domestic investment;
- export-oriented industrial structure;
- commodity exports during a price boom;
- weak domestic demand that suppresses imports.
This is why a surplus is not automatically evidence of a healthy economy. It may partly reflect low household consumption or weak investment.
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12. Primary and secondary income causes
The current account can change even if trade is unchanged.
Primary income may deteriorate when:
- foreign ownership of domestic firms rises and profits are remitted abroad;
- interest payments on external liabilities rise;
- domestic investors earn lower returns on assets abroad;
- global interest rates change the relative value of receipts and payments.
Primary income may improve when residents hold profitable foreign assets or receive more compensation from employment abroad.
Secondary income may change because of:
- migration and remittance flows;
- changes in foreign aid;
- disaster relief;
- contributions to international institutions;
- demographic and employment changes affecting migrant workers.
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13. Commodity prices and one-off shocks
Commodity exporters can experience large current-account changes when world prices move.
export commodity price rises → export receipts rise → current account may improve
Commodity importers may experience the opposite effect. Tourism-dependent countries can see their services balance deteriorate sharply after a pandemic, conflict, natural disaster or security shock.
Temporary shocks should be separated from long-run structural weakness.
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Consequences of current-account imbalances
14. Why “deficit bad, surplus good” is too simple
A current-account deficit means the economy’s current payments to the rest of the world exceed its current receipts. It is the counterpart of net borrowing from, or net asset sales to, the rest of the world when the capital account is allowed for.
A deficit can be beneficial when it finances:
- productive capital imports;
- infrastructure;
- technology;
- investment with a return above the cost of foreign finance;
- temporary consumption smoothing after a shock.
It is more concerning when it reflects:
- persistently weak competitiveness;
- low national saving;
- a consumption boom;
- unproductive borrowing;
- dependence on short-term and unstable external finance.
A surplus may reflect strong competitiveness and foreign-asset accumulation, but it can also reflect weak domestic demand, low investment or excessive saving.
The correct judgement asks:
What caused the imbalance, how large and persistent is it, how is it financed, and what is the economy’s capacity to adjust?
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15. Domestic consequences of a deficit
Aggregate demand, output and employment
Net exports are a component of aggregate demand.
If a deficit widens because exports fall or imports replace domestic production:
net exports fall → AD may fall → real output and employment may fall, with downward pressure on the price level
But a deficit can also widen during rapid growth because households and firms import more. In that case AD may be high rather than weak. The cause matters.
Consumer welfare and productive capacity
Imports can provide:
- greater choice;
- lower prices;
- raw materials and components;
- machinery and technology unavailable domestically.
A deficit caused by capital-goods imports may increase future productive capacity.
External liabilities and future income payments
Persistent deficits normally require financial inflows. This may increase:
- foreign ownership of domestic assets;
- external borrowing;
- future interest, dividend and profit payments abroad.
Those future payments are primary income debits and may make the current account harder to improve.
A current-account deficit does not automatically mean the government budget is in deficit or that all financing is government debt. The borrowing and asset sales may be private.
Confidence, interest rates and adjustment risk
If investors doubt that a deficit can be financed sustainably:
- capital inflows may slow;
- the currency may depreciate;
- borrowing costs may rise;
- reserves may come under pressure in a managed system;
- consumption, investment or government spending may need to fall abruptly.
A sudden loss of external finance can force a painful correction. Risk is greater where liabilities are short term, denominated in foreign currency or used for unproductive spending.
Inflation
Currency depreciation associated with a deficit can raise import prices and production costs, creating inflationary pressure. Conversely, a deficit caused by weak export demand may reduce AD and inflation. Again, the mechanism is conditional.
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16. Domestic consequences of a surplus
A surplus can:
- add to AD through positive net exports;
- support output and employment in export industries;
- allow residents to acquire foreign assets;
- generate future primary income receipts;
- strengthen the currency or foreign-reserve position.
Possible disadvantages include:
- currency appreciation that reduces later export competitiveness;
- demand-pull pressure where the economy is near capacity;
- excessive dependence on foreign demand;
- under-consumption or weak domestic investment;
- exposure to a slowdown in trading partners.
A surplus generated by suppressed domestic demand may coexist with weak living standards or underused capacity.
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17. Consequences for the external economy
Current-account balances are linked across countries: one economy’s surplus has counterpart deficits elsewhere.
A deficit country can benefit trading partners by purchasing their exports, supporting foreign output and employment. A surplus country supplies goods and finance to the rest of the world and may accumulate claims on deficit countries.
Large or persistent imbalances may create:
- trade tensions and protectionist pressure;
- accusations of unfair exchange-rate or industrial policy;
- dependence of surplus economies on external demand;
- dependence of deficit economies on continuing finance;
- vulnerability to abrupt capital-flow reversals;
- global adjustment problems if many countries try to increase surpluses simultaneously.
Not every imbalance is excessive. Differences in demographics, investment opportunities, resource endowments, income levels and temporary shocks can make deficits or surpluses appropriate.
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18. Exchange-rate pressure
In a floating system, a current-account deficit may create increased supply of the domestic currency as residents buy foreign goods, services and assets. A surplus may create increased demand for the currency as foreigners buy domestic exports.
However, the actual exchange rate also depends on financial-account flows, interest rates, expectations and central-bank actions. Therefore:
- deficit does not guarantee depreciation;
- surplus does not guarantee appreciation;
- exchange-rate adjustment does not guarantee immediate current-account balance.
The older teaching claim that floating exchange rates necessarily eliminate persistent imbalances is rejected.
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19. How to evaluate an imbalance
Use the following framework.
Cause
- competitiveness problem;
- domestic demand boom;
- productive investment;
- commodity-price shock;
- weak domestic demand;
- demographic saving;
- primary-income payments;
- remittance changes.
Size
Consider the value and its scale relative to GDP, exports, reserves and external liabilities.
Duration
A temporary deficit after a natural disaster differs from a structural deficit lasting many years.
Financing and use of funds
- stable direct investment or volatile short-term debt;
- domestic-currency or foreign-currency liabilities;
- productive investment or consumption;
- diversified lenders or concentrated exposure.
Capacity to adjust
- exchange-rate flexibility;
- export diversification;
- spare productive capacity;
- labour and capital mobility;
- policy credibility;
- access to international finance.
Distribution
An improvement can still harm households if it is achieved through recession, lower imports and reduced living standards. A deficit can benefit consumers through cheaper or wider imports while harming import-competing workers.
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Exam Mastery
20. Calculation sequence
For any data table:
- calculate goods balance: goods exports − goods imports;
- calculate services balance: services exports − services imports;
- add them for trade in goods and services;
- calculate primary income receipts − payments;
- calculate secondary income receipts − payments;
- add all four balances for CAB;
- state surplus, deficit or balance with the correct sign and unit.
21. Analysis chain for a cause
Example: lower productivity growth than trading partners.
slower productivity growth → unit costs rise relative to competitors → export prices become less competitive and imports become more attractive → export receipts may fall and import payments may rise → trade balance and CAB deteriorate
Then evaluate using:
- demand elasticities;
- product quality;
- exchange-rate response;
- firms’ profit margins;
- time period.
22. Analysis chain for a consequence
Example: persistent consumption-led deficit financed by short-term foreign borrowing.
deficit → repeated external finance required → external liabilities and debt-service payments rise → primary income debits increase → investor confidence becomes more important → sudden-stop risk and future adjustment pressure rise
Then contrast with a deficit financing productive capital imports that raise future output and export capacity.
23. Common mistakes
- Calling every import a debit in the goods account: imported services belong in services.
- Treating the trade balance as the current-account balance.
- Putting dividends and interest in trade in services: they are primary income.
- Putting remittances in primary income without checking whether they are transfers.
- Ignoring negative signs in calculations.
- Saying a deficit means the country has “no money”.
- Saying a current-account deficit is the same as government debt.
- Assuming all deficits reduce AD and all surpluses raise welfare.
- Assuming a deficit automatically depreciates the currency.
- Importing capital/financial-account detail into an AS answer that only asks about the current account.
24. Strong conclusion template
The current-account imbalance is not automatically beneficial or harmful. Its effect depends primarily on its cause, persistence and financing. A deficit used to finance productivity-enhancing investment may be sustainable and raise future export capacity, whereas a large consumption-led deficit financed by short-term foreign-currency debt is more vulnerable. A surplus may demonstrate competitiveness, but one caused by weak domestic demand may carry an opportunity cost. The strongest judgement therefore uses evidence about investment, saving, external liabilities, competitiveness and adjustment capacity rather than the sign alone.
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Deep Dive
25. Saving and investment interpretation
At a deeper level, a current-account balance is related to the difference between national saving and domestic investment.
- deficit: domestic investment exceeds national saving;
- surplus: national saving exceeds domestic investment.
This helps explain why protectionism alone may not remove a deficit: restricting one group of imports may change relative prices without correcting the underlying saving-investment gap. This identity is useful for evaluation but is not required as a central calculation in AS Topic 6.3.
26. Data revisions and measurement difficulties
Balance-of-payments data can be revised because statisticians estimate many cross-border transactions using surveys and administrative sources. Digital services, multinational-company income, transfer pricing, informal remittances and changes of economic ownership can be difficult to measure.
For examinations, use the data provided. In real analysis, avoid treating a first estimate as perfectly precise.
27. Current-syllabus boundary
Topic 6.3 does not require a full account of:
- capital account components;
- financial account components;
- reserve-asset accounting;
- balance-of-payments double-entry identities;
- policies to correct the current account;
- detailed exchange-rate determination;
- Marshall–Lerner condition or J-curve analysis.
Those areas belong mainly to Topics 6.4, 6.5 or A Level 11.1. They may support evaluation but should not displace the four required current-account components, calculations, causes and consequences.