How Inflation and Exchange Rates Affect Each Other
Inflation can weaken a currency, and a weaker currency can raise inflation. The relationship is powerful but never mechanical or one-directional.
Start with purchasing power
Inflation means that the general price level rises and each unit of currency buys fewer goods and services at home. If one country persistently has much higher inflation than its trading partners, its products can become relatively expensive and confidence in the currency can weaken. Over time, that can put downward pressure on the exchange rate.
The adjustment is not immediate or exact. Productivity, export earnings, imports, capital flows, interest rates, public debt, reserves, expectations and political risk also influence currency demand.
How depreciation can increase inflation
When the Birr depreciates, an importer needs more Birr to purchase the same amount of foreign currency. Imported fuel, medicine, machinery, fertilizer and other goods can therefore become more expensive in local-currency terms.
The effect can spread beyond finished imports. Ethiopian producers that use imported fuel, transport, packaging or equipment may face higher costs and pass some of them to consumers. Economists call this exchange-rate pass-through.
Why pass-through is not one-for-one
A 10 percent currency depreciation does not automatically create 10 percent inflation. Businesses may absorb part of the cost in profit margins, imported goods may represent only part of a product’s cost, demand may be weak, or taxes and administered prices may change. The speed and size of pass-through differ across products and time periods.
Expectations matter. If households and firms expect continuing depreciation and inflation, they may raise prices and wages earlier. Credible monetary and fiscal policy can reduce that feedback loop.
Interest rates complicate the picture
A central bank may raise interest rates or tighten liquidity to contain inflation. Higher real returns can support demand for the domestic currency, but they can also slow credit and economic activity. If investors doubt that the policy will last, the exchange-rate effect may be limited.
This is why it is misleading to say that inflation always weakens a currency or that higher interest rates always strengthen it. Markets react to the full policy mix and to expectations about the future.
The Ethiopian reform experience
Ethiopia’s July 2024 foreign-exchange reform allowed a substantial adjustment of the official exchange rate. A larger depreciation could have produced a severe inflation shock, but the IMF reported in 2025 that the inflation impact was lower than initially anticipated and that inflation had fallen during the first year of the broader reform program.
That result does not mean exchange-rate risk disappeared. The IMF continued to emphasize tight monetary and financial conditions, market efficiency and protection for vulnerable households. Future inflation will depend on domestic policy, supply conditions and global prices as well as the Birr.
How to read rate movements responsibly
A daily bank-rate change is not enough to diagnose inflation. Look for a sustained trend, compare it with official inflation releases, and distinguish temporary shocks from broad price pressure. Also separate cash rates from transaction and indicative rates.
For households and businesses, the practical issue is exposure: imported costs, foreign-currency obligations, export revenue and the timing of payments. Exchange-rate comparisons can help with a transaction, but they are not an inflation forecast.