Imagine ten children trading candies in a classroom, but each of them uses a different exchange system. One says three candies equal one chocolate bar, while another says ten candies equal one chocolate bar. Before they can trade, they first have to argue about the exchange rate.
That is roughly what happens when Southeast Asian countries trade with one another every day.
The discussion of a single ASEAN currency is not new, but the issue regained momentum in 2025 amid global economic uncertainty and tariff pressures from the United States. What makes the debate more complicated is that the currencies of ASEAN's ten member states are moving in different directions at the same time.
How Wide Are ASEAN's Economic Gaps?
This is where the challenge begins. According to 2024 data from the World Bank, Singapore's GDP per capita stood at US$90,674, while Myanmar's was just US$1,158 in the same year. The gap was nearly 78-fold between two countries that are both members of Association of Southeast Asian Nations.
Myanmar's situation has, in fact, continued to deteriorate. In its December 2025 Myanmar Economic Monitor, the World Bank projected that Myanmar's economy would contract by 2.0 percent in the fiscal year ending March 2026, after a magnitude 7.7 earthquake in March 2025 caused direct losses estimated at US$11 billion.
The damage was equivalent to 14 percent of Myanmar's total GDP and affected more than 17 million people.
By contrast, Singapore grew by 4.4 percent in 2024 and 5.0 percent in 2025. The gap between the two countries is therefore not only a matter of current economic conditions, but also of trajectories that continue to diverge.
In this context, a single currency would mean a single interest-rate policy for two economic realities that are almost impossible to compare. A country facing economic collapse and another experiencing strong growth cannot be prescribed the same medicine.
What Would Change Under a Single ASEAN Currency?
The most immediate benefit would be easier transactions and the elimination of currency conversion costs across member states. Intra-ASEAN trade has long remained relatively small compared to its potential.
In 2024, trade among ASEAN members accounted for only about 21.2 percent of the region's total trade, far below the European Union, where internal trade represents roughly 60 percent of total trade.
The euro provides a useful reference point here. According to the European Central Bank, trade within the eurozone increased by more than 50 percent during the first decade after the euro was introduced.
A single currency could also reduce asymmetric exchange-rate volatility, as seen in 2025. The Indonesian rupiah was among the weakest currencies in emerging Asia throughout 2025, depreciating by 3.1 percent in the third quarter and 1.1 percent in the fourth quarter.
By mid-2026, the rupiah had fallen to a record low against the U.S. dollar. At the same time, the Malaysian ringgit had become one of the strongest currencies in the region.
If both countries shared the same currency, there would no longer be situations where consumers in neighboring countries experience sharply different purchasing power simply because of exchange-rate movements.
Why a Single Currency Remains So Difficult
Joining a monetary union means that individual countries can no longer set their own interest rates. They cannot independently "cool down" an overheating economy, stimulate a slowing one, or allow their currency to weaken to boost exports. Those decisions must be made collectively for all members at once.
Greece demonstrated the risks of this arrangement. During the sovereign debt crisis of the 2010s, Greece could not devalue its currency because it was already tied to the euro. Its main options were fiscal austerity measures, including spending cuts and tax increases, which further deepened the economic downturn.
Moreover, ASEAN economies are not yet moving in sync. The rupiah remains under pressure, while the ringgit is at its strongest level in years. Forcing economies with such different conditions to move forward under the same monetary policy would inevitably create strains.
One country would benefit from the policy, while another could find itself constrained by it.
Integration Without Monetary Union
Rather than forcing the adoption of a single currency, ASEAN is building systems that make cross-border transactions function more like those within a single market, while preserving each member state's monetary sovereignty.
Throughout 2025, ASEAN's cross-border QR payment network processed 36.2 million transactions worth US$716.4 million. As of December 2025, 29 QR payment and person-to-person transfer linkages had been established within the region and with external partners, according to the official joint statement of the ASEAN Finance Ministers' Meeting in the Philippines.
As ASEAN Chair in 2026, the Philippines has made the expansion of regional payment connectivity one of its key priorities.
A single ASEAN currency may still be far from reality, but the direction is already clear. The region is building financial infrastructure that reduces friction in cross-border transactions without requiring ten countries to share the same currency.
In other words, ASEAN is pursuing many of the practical benefits of monetary integration without asking its members to surrender control over their own money.
