What it means
The measure has two components: exports from country A to country B, and imports into country A from country B. Adding them gives total bilateral trade, which shows how important the relationship is, while subtracting them gives the bilateral balance, which shows which way the money flows on net.
It matters to businesses because bilateral relationships drive tariffs, quotas, customs procedures and trade agreements. A company importing components from a particular country needs to know whether that trading relationship is governed by a preferential agreement, because the difference between a 0% and a 12% duty rate lands directly on cost of goods sold.
Bilateral trade agreements are the policy tool built on top of the measure. They typically cut tariffs between two countries, agree common standards for particular products and set out rules of origin, which determine how much of a product must be made locally to qualify for the lower rate.
The most important nuance is that a bilateral deficit is not the same as a problem. A country can run large deficits with individual partners while its overall trade position is balanced, simply because it buys raw materials from one place and sells finished goods to another.
Global supply chains make the raw numbers harder to read still. A device assembled in one country from parts made in four others is recorded at full value against the assembling country, which overstates that country's contribution and distorts what the bilateral figure appears to say.
In practice
Real-world examples.
Example
A furniture importer discovers that a new bilateral agreement removes a 9% duty on solid wood products from its main supply country. On $6,000,000 of annual imports that is $540,000 of duty saved, provided the rules of origin can be evidenced.
Example
A food exporter tracks bilateral trade data to identify which partner markets are growing fastest for its category. It redirects two sales roles towards a market where bilateral flows in packaged foods have risen for four consecutive years.
Example
A car parts manufacturer finds that a bilateral dispute has triggered retaliatory tariffs on its product code. It reroutes production to a plant in a third country, adding $1.40 per unit in freight but avoiding a 25% tariff.
Formula
Calculation
Bilateral trade balance = Exports to partner - Imports from partner. Total bilateral trade = Exports + Imports. Export coverage ratio = Exports / Imports.
Over one year, Country A exports $840,000,000 of machinery, chemicals and services to Country B, and imports $1,120,000,000 of electronics, textiles and components from Country B.
Balance = $840,000,000 - $1,120,000,000 = -$280,000,000, a bilateral deficit of $280,000,000 for Country A.
Total bilateral trade = $840,000,000 + $1,120,000,000 = $1,960,000,000.
Coverage ratio = $840,000,000 / $1,120,000,000 = 0.75, meaning exports cover 75% of imports. If a new agreement lifted Country A's exports by 20%, exports would rise to $840,000,000 x 1.20 = $1,008,000,000, cutting the deficit to $1,008,000,000 - $1,120,000,000 = -$112,000,000 and raising coverage to $1,008,000,000 / $1,120,000,000 = 0.90, or 90%.Case study
Seen in the real world.
This case is illustrative and the company is fictional. Penhallow Ceramics exported $14,000,000 of tableware a year, with 78% of that going to a single overseas market, and imported $9,000,000 of clay and glaze inputs from the same country. On paper its bilateral position looked healthy, with exports covering imports comfortably.
When the two governments began a tariff dispute, both sides of Penhallow's business were exposed at once. A proposed 15% duty on imported ceramics would have added roughly $1,638,000 to the landed cost of its exports, while a matching duty on raw materials would have added about $1,350,000 to input costs, a combined illustrative hit of nearly $3,000,000 against operating profit of $2,400,000.
Penhallow's response was to treat trade concentration the same way it treated customer concentration. Over three years it qualified clay suppliers in two additional countries and grew a second export market from 4% to 21% of sales, accepting slightly lower margins in exchange for no longer having its cost base and its revenue base tied to the same bilateral relationship.
Watch out
Common mistakes.
- Treating a bilateral deficit as evidence that a country is losing, when it usually just reflects what each economy specialises in and where its supply chains sit.
- Assuming a trade agreement automatically lowers duty, when the reduced rate depends on meeting rules of origin and providing the correct documentation at the border.
- Ignoring services, which many businesses forget are counted in trade figures and which can reverse the picture that goods data alone suggests.
Questions
People also ask.
How is bilateral trade different from total trade?
Bilateral trade covers flows with one named partner, whereas total trade aggregates every partner, so a country can be in deficit with one and in surplus overall.
Do bilateral agreements always benefit both countries?
They usually raise total trade between the two, but the gains and losses fall unevenly across industries, so some domestic sectors are worse off even when the country as a whole gains.
Why do supply chains distort the numbers?
Because trade is recorded at the full value of the goods crossing each border, so a product assembled from imported parts inflates the assembling country's recorded exports.
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