The Pound Sterling Doesn’t Travel

The pound is one of the deepest, most trusted currencies in the world. So why does paying a supplier in Bogotá or Manila still cost a small fortune? Because what you’re paying for isn’t actually the currency.

The name gives the whole game away.

The currency isn’t officially “the pound,” it’s the pound sterling. The likeliest story behind its origin is quite a literal one: The pound reflected the price of a pound weight of sterling silver, the 92.5% standard still stamped on good cutlery today. It was a metal you could hold in your hand, solid and dependable, real enough to melt down and weigh.

That reputation for solidity never left. In the Bank for International Settlements' 2025 survey, the pound was the fourth most actively traded currency on earth, on one side of roughly 10% of all foreign exchange trades. It ranks fourth in the IMF's reserve data too, making up about 4.6% of the money the world's central banks hold outside their own currencies, and it sits reliably among the top four currencies for global payments by value. For a country of Britain's size, that is punching far above its weight.

Sterling is strong in many ways, but not everywhere.

The reputation and the reality

The sterling against the dollar, a pair traders nickname "cable," is one of the deepest and most liquid markets in the world. Move a large sum from pounds into dollars and you will get a tight price and near-instant settlement. It is a vast market that never sleeps, imperturbable by almost any clip size.

Now try to move the same sum between pounds and Colombian pesos. Or Philippine pesos. Or Indian rupees.

There is no deep, direct market across these corridors. In practice, there is no real "pounds to pesos" market at all. So for money to move, it must first pass through a vehicle currency, which is in almost every case USD. This is the so-called triangle trade we’ve talked about before. Two conversions. Two spreads. Two sets of hands taking fees, many of which are essentially invisible.

Despite its reputation for strength, in this scenario, the pound behaves not too differently than the Colombian peso itself, or any other currency forced to pass through the dollar. And like those currencies, the price you pay is set by the weakest leg of the journey.

The pound's liquidity means nothing after leaving London. The moment they become dollars, you are now exposed to the shallowest pool in the chain, and that pool decides your rate, whether your payment clears on the first attempt, and how long your money sits in limbo while the market moves against you.

Sterling's strength, it turns out, was never really its own.

What Britain actually sends abroad

None of this is unusual, it describes how an enormous amount of British money moves every day.

The UK is one of the biggest senders of money in the world. More than £18 billion leaves the country in remittances each year, and much of it flows into exactly the corridors where sterling has no direct market, with India, Pakistan and the Philippines among the largest destinations. Add the businesses paying suppliers, contractors and staff across emerging markets, and you have an economy that leans heavily on the very routes where its own currency's depth runs dry.

Competition has done real work on some of them. The UK to India corridor carries so much volume, and now so many providers, that the cost of a smaller transfer has been pushed close to the United Nations target of 3%, which is a genuine win for all involved.

But try to send pounds into much of sub-Saharan Africa and the cost can balloon to upwards of 10%, while digital challengers have dragged that down, the region remains the most expensive in the world to pay into, sitting comfortably above the 6.5% global average the World Bank tracks. The so-called strength of the sterling has done little to change this calculus.

The lesson is consistent, what your payment costs has very little to do with the strength of the currency you started in. It is set by the depth of the market you are trying to reach, and by whoever is standing in the space where a direct market should be.

There are no strong currencies, only strong corridors

If you take one idea from this, take that one.

We describe currencies as though strength is a badge they wear everywhere they go. The pound is strong. The dollar is strong. As if that tells you what is going to happen to your money. It does not. Strength is not a property of a currency, it is a property of the pair, in the size you need, at the exact moment you trade it.

Liquidity that is bottomless against the dollar can be a puddle against a managed emerging-market currency an hour before that market shuts down for the weekend. The same pounds that cross cable without a ripple can have a payment rejected or sit stranded in transit while the price drifts simply because they turned into a corridor no one bothers to keep deep.

So it is worth being sceptical whenever a business says it feels safe because it pays in sterling, the true price of the transaction can hide elsewhere.

So what actually protects you

A deeper corridor.

The only thing that changes the outcome is who is standing on the other side of that second leg. A provider who genuinely holds liquidity in the thin currency, rather than passing your payment down a chain of correspondent banks that each take a cut, can price the whole route instead of just the easy half of it. That is the difference between a rate that survives contact with a real market and one that falls apart the moment you need to move size.

It is also why so much of the interesting work in this industry is happening on the second leg. Newer settlement rails, including stablecoins used as a bridge between two currencies, exist precisely to make the shallow pools a little deeper and a little faster, so that the weakest link in the chain stops setting the price for everyone else – a change in plumbing that improves all flows.

Which is the practical takeaway for anyone moving real money into or out of Britain: stop shopping for currencies, and start interrogating corridors. Ask how deep the specific route is, who is actually providing the liquidity at the far end, and what happens on that corridor's worst day.. Those questions will tell you far more about your true cost than the strength of the pound ever will.

Back to the silver

Sterling began as something you could weigh, a pound of silver that was trusted because it was real. Later, when a telegraph cable was laid across the Atlantic so London and New York could agree on a price in minutes, its strength became about connection, about being the currency the world could reach.

The through-line continues into today and across every corridor, the value has moved from material to relationships, so when measuring liquidity in the market, it makes sense to measure the quality of those relationships rather than the source of the silver.