How does a currency peg work?

A currency peg works through the central bank: it commits to buy and sell its own currency against the anchor currency at one fixed rate, using its foreign-exchange reserves. As long as the market believes the central bank can and will defend that rate, the market price stays at the peg. No separate supply-and-demand price forms.

A peg can sit under more than one currency pair at once. Because USDT targets one US dollar and the dirham is fixed to the dollar, the USDT/AED rate inherits the same anchor — we look at why the USDT to AED rate sits at 3.67 in a separate guide.

The opposite of a peg is a floating currency, where the price moves all day as orders cross. A pegged currency gives up that flexibility against the anchor, but it still floats with the anchor against everything else: when EUR/AED moves, it is EUR/USD moving underneath.

The dirham peg in the UAE: 3.6725 since 1997

The UAE dirham has been pegged at AED 3.6725 per US dollar since November 1997, and the Central Bank of the UAE maintains the rate by exchanging dirhams for dollars on demand. USD/AED therefore does not trade freely the way EUR/USD does.

The CBUAE describes the mechanism openly: to hold the peg it intervenes in the foreign-exchange market automatically, buying or selling dollars against dirhams at the fixed rate. Nearly three decades of foreign reserves and dollar-priced oil income stand behind that commitment.

For residents the practical effect is that an AED balance behaves like a dollar balance with a different label. Salaries, rents and property prices in dirhams carry no USD exchange risk — the risk only appears when you convert into a floating currency such as the euro or the rupee.

Why the peg matters when you sell USDT

The AED peg matters to a USDT seller because it removes nearly all exchange-rate risk from the trade. The USDT/AED rate is anchored at 3.6725 by policy, so the quote you accept is the rate you receive — the only real variable left is the desk's spread.

In a floating currency, the rate can move between agreeing a price and the money landing in your account. In AED that leg is fixed, and what you negotiate instead is the spread: ours runs 0.08% to 0.40% by ticket size, published on the pricing section of the main page.

The peg also explains a classic red flag: a desk quoting a rate meaningfully better than 3.6725 is promising better-than-arithmetic, and the missing money usually appears in the settlement leg. The point is covered in detail in our guide to selling USDT in Dubai.

A worked example: selling 250,000 USDT into AED

Take a ticket of 250,000 USDT sold at the pegged rate. At 3.6725 the gross amount is AED 918,125; at a 0.25% spread the desk's fee is AED 2,295, so AED 915,830 reaches your bank account. With an approved account, AED goes out by UAEFTS the same business day.

Can a currency peg break?

A currency peg can break, because it is a policy commitment rather than a physical law. The Swiss National Bank abandoned its euro floor without warning in January 2015, and the franc made a double-digit move against the euro within minutes. The AED peg has held since 1997, and as of September 2026 the CBUAE still maintains the 3.6725 rate.

A USDT-to-AED trade actually carries two pegs at once. One is the dirham's peg to the dollar, defended by the CBUAE with foreign-exchange reserves; the other is USDT's peg to the dollar, which rests on Tether's reserves and arbitrage by market makers. If USDT trades at a premium or discount to one dollar, that gap appears in your AED proceeds on top of the spread.

This guide is informational and is not legal, tax or investment advice, nor an invitation to buy or sell any virtual asset. Rules and figures are as of September 2026 — re-check the sources before acting. Virtual assets may lose their value in full or in part and are subject to extreme volatility.