Balance of Payments vs Tariff
Balance of Payments and Tariff are two International Trade & Finance concepts in AP Economics that students often mix up. The balance of payments is a record of all economic transactions between a country and the rest of the world over a period. A tariff is a tax on imported goods that raises their price and protects domestic producers from foreign competition. Here is how they compare side by side.
It is made up mainly of the current account (trade and income flows) and the capital and financial account (asset flows). The two broadly offset each other, so the overall balance tends toward zero. A current account deficit is mirrored by a financial account surplus.
It raises government revenue and helps domestic producers, but raises prices and reduces quantity for consumers, creating deadweight loss. It reduces imports and the overall gains from trade. Tariffs are a common form of trade protection.
Balance of Payments vs Tariff: A Record No One Can Legislate and a Tax Anyone Can
| Balance of Payments | Tariff | |
|---|---|---|
| What it is | A record of every transaction with the rest of the world | A tax on one category of imported goods |
| Can a legislature set it | No, the total comes to zero however the votes go | Yes, the rate is chosen and published |
| Revenue | None, a tally collects nothing | Collected on the imports that still arrive after the tax |
| What a tariff changes here | The composition of the current account, while the total stays at zero | The home price and quantity of the taxed good |
| Reaction abroad | None, a record provokes nothing | Retaliation, which returns as lower exports |
| Diagram it belongs to | No diagram, a set of accounts | The domestic market for the good, with a world price line |
| Question it answers | How was the external gap financed | Who gains and who loses inside one protected market |
Run the numbers and a tariff redirects trade far more than it shrinks a gap
Start with a country importing 100 of steel from one partner and placing a 20 percent tariff on it. Suppose the tariff cuts purchases from that partner by 40. Buyers do not stop using steel. Say 30 of the lost imports reappear as steel from an untaxed partner and 10 shifts to domestic mills, so total imports fall by 10 rather than 40. The government collects 20 percent on the 60 that still arrives from the taxed source, which is 12 of revenue, and that revenue is a transfer from domestic buyers to the domestic treasury rather than anything arriving from abroad. Then the currency answers. Fewer imports mean less home currency offered in exchange for foreign currency, so the home currency strengthens and exports become dearer to foreign buyers. Take exports falling by 6 as a result. The trade balance improves by 10 minus 6, which is 4, against a headline that suggested 40. Let the partner impose a matching tariff and even that 4 can disappear. Calculate the revenue box yourself at /calculate/tariff-revenue, and read the welfare side of the same diagram at /glossary/deadweight-loss.
The external total follows what a country saves and spends, so trade policy shows up as composition
A tariff moves the trade balance so little because the external gap is the difference between what a country produces and what it spends, and a tax on imports does not obviously change either one. Households have not decided to save more, firms have not cut investment, and the government has not altered its own borrowing, so the amount of foreign financing the country needs sits where it was. Once the currency has adjusted, the accounts land close to where they started, with a different mix of suppliers behind a similar total. That is also why the ledger cannot be the target of a policy. The full record sums to zero in every period, so a promise to improve the balance of payments has to be a promise about one line inside it, usually the goods line of /glossary/current-account. The exam split is sharp. A question about the protected market wants the domestic diagram, with the price rising to the world price plus the tariff, domestic output up, imports down, a revenue rectangle and two deadweight triangles. A question about the trade gap wants saving, investment and the exchange rate, and a tariff is a weak instrument on all three. Compare it with the quantity based version at /glossary/import-quota.
Frequently asked questions
Do tariffs reduce a trade deficit?
Barely, in most treatments. A tariff cuts purchases from the taxed supplier, but buyers switch to untaxed suppliers and to domestic producers, so total imports fall by far less than the headline. The currency then strengthens, because less of it is being sold for foreign currency, and dearer exports offset part of what remains. Since the external gap follows saving and investment, a tax that changes neither leaves the total close to where it was.
Where does a tariff appear in the balance of payments?
In the goods line of the current account, as a smaller import figure from the taxed source and often a larger one from somewhere else. The tariff revenue itself never enters the record, since it moves money from domestic buyers to the domestic government and no border is crossed. Whatever change does reach the current account is matched by an equal and opposite move on the financing side.
Why does a currency appreciation cancel part of a tariff's effect?
Imports are paid for in foreign currency, so buying fewer of them means selling less home currency in the exchange market. Lighter selling pressure raises the home currency's price, and a dearer currency makes exports more expensive for foreign buyers. Exports fall, which pushes the trade balance back toward where it began. Protection handed to the import competing industry is partly paid for by the export industries.
Live Exchange Rates graph. Drag the curves, or open the full version.
Live International Trade graph. Drag the curves, or open the full version.
Related comparisons
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