Most Canadians use currency exchange services without fully understanding how exchange rates work. You check a rate online, visit your bank or a foreign currency exchange provider, and receive a different rate than the one you expected.

That difference is not random.

Every time you convert currency, whether from the Canadian dollar to U.S. dollars, GBP, JPY, Australian dollars, or another foreign currency, the exchange rate determines how much money you receive. What many people don’t realize is the rate shown by a currency converter is often different from the rate offered by banks, financial institutions, and other providers.

Understanding how currency exchange works helps you spot hidden costs, compare providers more effectively, and keep more of your money when making international payments, travelling abroad, or moving funds between countries.

What is currency exchange?

Currency exchange is the process of converting one currency into another. Also known as foreign currency exchange, it allows individuals, businesses, and governments to buy and sell different currencies for travel, investing, international trade, and international payments.

The value of one currency compared to another is called the exchange rate.

For example, if one Canadian dollar is worth 0.73 U.S. dollars, the exchange rate between the Canadian dollar and the USD is 0.73. If you exchange $1,000 CAD at that rate, you would receive approximately $730 USD before any fees, commission, or markup.

While the process seems simple on the surface, exchange rates constantly move based on economic conditions, supply and demand, and activity in the foreign exchange market. Those factors ultimately determine how much foreign currency your money can buy.

How exchange rates are set

Exchange rates move constantly. The rate this morning won’t be the rate this afternoon, and the reason comes down to a massive global market where currencies trade against each other every second.

Currency pairs

Currencies always trade in currency pairs because one currency only has value relative to another.

In every currency pair, the first currency is the base currency and the second is the quote currency.

For example:

USD/EUR shows how many euros one U.S. dollar can buy.
USD/CAD shows how many Canadian dollars one U.S. dollar can buy.
CAD/USD shows how many US dollars one Canadian dollar can buy.
GBP/JPY shows how many Japanese yen one British pound can buy.

If CAD/USD trades at 0.73, one Canadian dollar purchases 73 US cents. If USD/CAD trades at 1.37, one U.S. dollar purchases 1.37 Canadian dollars.

Currency pairs form the foundation of all currency exchange transactions. Every time you convert currency, you are effectively buying one currency while selling another.

What moves exchange rates

Rates shift because supply and demand for each currency shift. Several forces push and pull at them throughout the day:

Interest rates. When a country’s central bank, like the Bank of Canada, raises rates, its currency often strengthens because higher returns attract investment.
Inflation. Lower, stable inflation tends to support a currency’s value over time.
Economic data. Employment numbers, growth figures, and trade balances all feed into how strong a currency looks.
Commodity prices. The Canadian dollar is closely tied to oil and other resources, so swings in commodity markets move the loonie.
Market sentiment. Political events, global uncertainty, and investor confidence can shift rates quickly, sometimes within minutes.

No single factor controls the rate. They interact, which is why exchange rates are impossible to predict with certainty and why the number genuinely changes from one day to the next.

The rate you see vs. the rate you get

Here’s the part that surprises most people. The rate you look up online is rarely the rate you receive when you exchange money. Understanding why is the single most useful thing you can take from this guide.

Mid-market rate

The rate you see on Google or in the news is the mid-market rate, also called the interbank rate. It sits exactly in the middle between what buyers are willing to pay and what sellers are willing to accept, and it’s the rate large banks use when they trade with each other.

The Bank of Canada publishes indicative daily exchange rates built from these mid-market quotes, which makes it a clean benchmark for what a currency is truly worth. The catch is that ordinary consumers rarely get this rate. It’s the wholesale price, not the retail one.

Spread and markup

The difference between the mid-market rate and the rate you’re actually offered is the spread. This is where banks and many providers quietly make their money.

Instead of charging you an obvious fee, they hand you a slightly worse rate than the real one and keep the difference. A Canadian bank might add a margin of two to three per cent on top of the mid-market rate. On a $10,000 exchange, that’s $200 to $300 gone, and you never see a line item explaining it.

That’s what makes the spread so easy to miss. It looks like you simply got “the rate,” when in reality the cost was folded into the number before it ever reached you.

Flat fees vs. percentage fees

On top of the spread, providers sometimes charge separate fees, and they come in two shapes:

Flat fees are a fixed amount per transaction, say $10 regardless of how much you exchange. These hurt small exchanges most, since $10 on a $200 conversion is a steep five per cent.
Percentage fees scale with the amount. A common example is the 2.5 per cent foreign transaction fee most Canadian credit cards add on purchases made in another currency, charged on top of the network’s exchange rate.

When you compare providers, you have to look at both the spread baked into the rate and any fees stacked on top. Only together do they tell you the true cost.

Where Canadians can exchange currency

Canadians have several ways to exchange money, and they differ a lot in how close they get you to that mid-market rate.<...

Knightsbridge Foreign Exchange

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