---
title: "Import Substitution Industrialization | International Economics"
description: "Import Substitution Industrialization is a development strategy that protects local industries so countries can replace imports with domestic production."
canonical: "https://fiveable.me/international-economics/key-terms/import-substitution-industrialization"
type: "key-term"
subject: "International Economics"
unit: "Unit 5"
---

# Import Substitution Industrialization | International Economics

## Definition

Import substitution industrialization (ISI) is a development strategy in International Economics that protects domestic industries so a country can replace imported goods with local production.

## What It Is

Import substitution industrialization, or ISI, is a development strategy in International Economics where a country tries to make at home the goods it used to buy from abroad. The goal is to build domestic industry, reduce dependence on foreign suppliers, and keep more economic activity inside the country.

The basic idea is pretty direct: if a developing country is spending a lot of money importing manufactured goods, the government can make those imports more expensive with tariffs or quotas, then support local firms until they can produce the same goods. That support often includes subsidies, tax breaks, cheap credit, import restrictions, and sometimes state-owned enterprises. The protected market gives new firms room to grow without being crushed by established foreign competitors.

ISI became especially common in Latin America during the mid-20th century. Many governments there saw trade dependence as a problem because exporting raw materials and importing finished goods left them vulnerable to price swings, outside control, and weak domestic industry. ISI was meant to break that pattern by building factories for consumer goods first, then, in some cases, more advanced industries later.

A simple example is a country that imports clothing, appliances, and basic machinery. Under ISI, the government might raise tariffs on imported clothing and appliances, then support local factories that produce those items. If the policy works, domestic companies expand, workers get jobs in manufacturing, and the country imports less of those goods. If it works poorly, the products may stay expensive, quality may lag behind foreign competitors, and firms may survive mainly because they are protected.

That trade-off is the heart of ISI. It can jump-start industry when a country lacks an industrial base, but protection can also create inefficiency. If firms do not face much competition, they may have less incentive to innovate, cut costs, or improve quality. Over time, the economy can become too focused on the home market, which makes growth slower once the easy import replacements are already done.

Another detail that matters in International Economics is that ISI is not just about trade policy. It is also about development strategy. You are not only asking, “Should imports be taxed?” You are asking, “How should a developing country structure its economy, build jobs, and move from dependence on foreign goods to stronger local production?” That is why ISI is often discussed alongside export-led growth, because the two strategies answer the same development question in very different ways.

## Why It Matters

Import substitution industrialization matters because it shows one of the biggest choices in development policy: protect domestic industry first, or open up and compete in world markets sooner. In International Economics, that choice affects tariffs, industrial policy, employment, prices, and a country's trade balance.

ISI also helps you read real country cases more clearly. When a government shields local producers, the short-term result may look positive, like factory growth, more industrial jobs, or lower import dependence. But the longer-term effects can be mixed. You may see high consumer prices, weak productivity, and firms that depend on policy protection instead of market demand. That is why ISI is often judged by both growth results and efficiency costs.

The concept also connects directly to how economists think about development stages. Many countries start by trying to build basic industries for goods like textiles, food processing, or simple machinery before moving into more complex production. ISI is one way to do that, but it can stall if the country never moves beyond protection. That tension is a major theme in comparing development strategies across regions and time periods.

## Connections

### Protectionism

ISI depends on protectionism because tariffs, quotas, and other trade barriers are what give domestic firms breathing room. The difference is that protectionism is the tool, while import substitution industrialization is the wider development strategy that uses that tool to build local industry. When you see both together, think policy shield plus industrial planning.

### State-Owned Enterprises (SOEs)

Some ISI programs use state-owned enterprises to produce goods the private sector cannot or will not make yet. SOEs can help a government enter heavy industry, utilities, or strategic sectors faster. In a case analysis, look for whether the state is just protecting firms, or actually owning and running part of the industrial base.

### [Infant Industries](/international-economics/key-terms/infant-industries)

Infant industry arguments are one of the main justifications for ISI. The idea is that young domestic firms need temporary protection until they become efficient enough to compete. This connection matters because a policy can start as a short-term shield, but turn into long-term dependence if the “temporary” part never ends.

### [Trade Balance](/international-economics/key-terms/trade-balance)

ISI is often sold as a way to improve the trade balance by reducing imports. If a country makes more of the goods it used to buy from abroad, import spending can fall. But the trade balance may still stay weak if the country needs to import capital goods, machinery, or raw materials to build those new industries.

## On the AP Exam

A quiz item or short essay may ask you to compare ISI with export-led growth, explain why a country chose one strategy, or predict the effects of tariffs on domestic factories. The move you make is to trace the policy chain: protection leads to local production, local production may raise employment, and long-term results depend on whether firms become competitive. In a country case, mention both the intended benefit and the likely downside, such as higher prices, lower efficiency, or dependence on government support. If you get a trade policy prompt, ISI is a useful example of development through import barriers rather than through open competition.

## Import Substitution Industrialization vs Export-led growth

These two strategies are often paired because they answer the same development question in opposite ways. ISI tries to replace imports with domestic production for the home market, while export-led growth pushes firms to make goods for global markets. If a prompt asks how a country earns foreign exchange or expands industry, check which direction the policy points.

## Key Takeaways

- Import substitution industrialization is a development strategy that replaces imported goods with domestically produced goods.
- ISI usually uses tariffs, quotas, subsidies, and sometimes state-owned enterprises to protect young industries.
- The strategy can build factories and jobs, but it can also create inefficient firms if protection lasts too long.
- Many Latin American countries used ISI in the mid-20th century before shifting toward export-led growth.
- In International Economics, ISI is a classic example of how trade policy shapes industrial development and the trade balance.

## FAQs

### What is import substitution industrialization in International Economics?

Import substitution industrialization is a policy approach where a country tries to build domestic industries so it no longer has to rely as much on imported goods. Governments usually support this by making imports more expensive and helping local firms grow. In International Economics, it is studied as a development strategy, not just a trade rule.

### How does import substitution industrialization work?

The government protects local producers with tariffs, quotas, subsidies, or state-owned enterprises. That protection makes imported goods less competitive, so domestic firms get a chance to expand and replace those imports. The catch is that protection can keep firms inefficient if they never have to compete hard.

### What is a common example of ISI?

A common example is a country that used to import consumer goods like clothing or appliances, then adds tariffs on those imports and gives local factories support to produce them instead. Over time, the country buys less of those goods from abroad. This can build industry, but prices may stay higher than in a fully competitive market.

### Is import substitution industrialization the same as protectionism?

No. Protectionism is the set of tools, like tariffs and quotas, used to limit imports. ISI is the bigger development plan that uses those tools to grow domestic manufacturing. So protectionism can exist without ISI, but ISI usually depends on protectionism.

## Related Study Guides

- [5.2 Export-led growth vs. import substitution](/international-economics/unit-5/export-led-growth-vs-import-substitution/study-guide/1RuAtIhG1y1ple7Q)
- [5.1 Trade strategies for developing countries](/international-economics/unit-5/trade-strategies-developing-countries/study-guide/fDFRxcVjRplYKFfy)

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