The rate you were quoted is not the rate you saw
A finance manager in Lagos needs to pay a supplier in pounds. She checks a rate online, sees a number, and then gets a quote from her bank that is noticeably worse. Nobody lied to her. She compared two different prices without knowing it.
That gap is the spread, and it is the most common place where foreign exchange costs hide. It rarely appears as a line item. It sits inside the rate, which is why so many businesses think they paid no fee when they paid a good deal.
Mid market, bid and ask
Every currency pair has a mid market rate. It is the midpoint between the price at which dealers are willing to buy a currency and the price at which they are willing to sell it. It is a useful reference. It is not a price anyone can usually trade at.
What you actually face are two numbers. The bid is what a dealer pays to buy the base currency from you. The ask is what the dealer charges to sell it to you. The ask is always higher than the bid, and the difference between them is the spread.
Say the mid rate for a pair is 100. A dealer might quote 99 to buy and 101 to sell. If you buy and then immediately sell back, you lose the width of that gap, even though the market did not move at all. That is a real cost, paid every time you cross.
Why spreads exist
A spread is not simply greed, though it can include some. It pays for several things at once.
- The risk the dealer carries between taking your trade and offsetting it elsewhere.
- The cost of holding inventory of a currency that may move against them.
- The cost of liquidity, meaning how easily the pair trades at size.
- Operational and compliance costs, which are not small for cross border flows.
Major pairs traded in deep markets tend to have narrow spreads. Pairs involving currencies with thinner markets, tighter capital controls or volatile conditions tend to have wide ones. This is not a judgement on any country. It is what happens when it is harder to find the other side of a trade.
Spread, fee and margin are three different things
Providers describe their pricing in ways that make comparison hard, so it helps to separate the parts.
The spread is the difference between buy and sell prices, or between the mid rate and the rate you are given. The fee is a stated charge, flat or percentage, added on top. The margin is the provider's markup over what it paid for the currency, which is often how the spread is built.
A provider advertising zero fees may be earning everything through the rate. A provider with a visible fee may be giving you a rate very close to mid market. Neither is automatically better. What matters is the total cost, and you can only see the total by comparing what you send with what arrives.
How to measure what you really paid
The method is simple and worth doing on every meaningful transfer.
First, note the mid market rate at the time of the transaction. Then take the amount that arrived, add back any stated fees, and work out the effective rate you received. The difference between the effective rate and the mid rate, as a percentage of the mid rate, is your all in cost.
Do this a few times with different providers and the pattern becomes clear. Some are cheap on small transfers and expensive on large ones. Some are good on one corridor and poor on another.
Where businesses lose money without noticing
Three habits cost more than most teams realise.
Converting through a middle currency. Moving naira to pounds through dollars means paying a spread twice. Often it is just how a bank's system routes the trade.
Treating the first quote as the market. Spreads vary between providers, and they vary by time of day and by size. A business that always uses one bank out of habit is paying for the convenience, whether it knows it or not.
Ignoring timing. Rates move, and a quote that was fair at ten in the morning may be stale by the afternoon. For recurring payments, a business that converts at random moments takes on risk it did not choose. Moving money in a few planned chunks, rather than one large lump at a bad moment, can smooth that out, though it does not remove the risk.
What a treasury team can do about it
You cannot negotiate the market, but you can negotiate your position within it.
Know your volumes. A business that sends regularly has bargaining power that a one off sender does not, and should ask for pricing tiers, not just accept the standard rate. Ask providers to state their rate as a margin over mid market, so offers can be compared on the same basis.
Keep a simple log: date, pair, amount, mid rate, rate received, fee. After a quarter you will know which provider is cheapest for which job. Treasury tooling should make this automatic, since a number you never see is a number you never manage. That is the thinking behind Isura.
A habit to take away
Next time you are quoted a rate, ask one question: how does this compare with mid market, and what will arrive at the other end? If the provider cannot answer clearly, that is information too. The spread is not a trick. It is a price, and like any price, it is cheaper to pay when you can see it.