What does it cost to hold money in a foreign currency?
Short answer. In most cases there is no fee, which is why holding feels free. Two costs apply anyway: the exchange-rate exposure you carry while the rate moves, and the return you give up while the money sits in an account paying less than you could earn elsewhere. The first is uncertain and gets all the attention. The second can be estimated in advance and gets almost none.
Is there an actual fee for holding a balance?
Usually not. Multi-currency accounts generally let you keep a balance in a supported currency without charging for the privilege.
Check three things before assuming that applies to you. Some accounts charge a monthly fee once a balance exceeds a threshold. Some charge for inactivity. And some apply a small charge on balances in currencies with negative or very low policy rates, though this has become rarer.
If none of those apply, the explicit cost of holding is zero. Everything below is about the costs that do not appear on a statement.
What is the exposure, and how big is it?
This is exchange-rate risk, and it is the cost people do think about. You are holding an asset priced in something other than the currency you will eventually spend, so if that price moves against you before you convert, you lose value that never appears as a deduction.
The direction is unknowable, which is what makes this an exposure rather than a cost. What you can do is size it, so you know what is at stake.
Look up how much your currency pair has moved over the period you expect to hold it. Not to predict where it goes, but to know the range. If the pair has moved by a few per cent in a typical quarter, then holding a quarter's income exposes you to a few per cent of that income. Whether that matters depends on whether an unlucky outcome would cause you a problem, which is also how to size a budgeting buffer.
This is where most advice written for businesses stops being useful to you. Corporate guidance points to forward contracts, which lock in a rate for a future date. They work, but they are built for commercial volumes, and access at individual amounts is limited and varies by provider. Some consumer platforms offer a simplified version, usually a short rate lock rather than a true forward. It is worth checking what yours offers before assuming either that hedging is available to you or that it is not.
How much does it cost to hold $5,000 for six months?
More than most people assume, and it takes the form of a forgone return rather than a charge.
Money sitting in a foreign currency balance often earns nothing, though a few providers now pay interest on selected currencies, so check yours rather than assuming. Money converted and deposited locally may earn a deposit rate. The difference between the two is a real cost of holding, and unlike the exposure it can be estimated in advance.
Take $5,000 held for six months in an account paying nothing, where a local deposit would have paid 4% a year:
Opportunity cost = amount × (alternative rate − actual rate) × time held
With the balance earning nothing, that is 5,000 × (0.04 − 0) × 0.5 = $100, or 2% of the balance. At a 6.5% alternative it is $162.50, or 3.25%. If your account does pay something, subtract it: the cost is the gap between the two rates, not the headline rate of the alternative.
Set that against the cost of converting. Your in-transit cost is the gap between what a payment is worth at the mid-market rate and what reaches your account, expressed as a percentage. At 1.55%, converting once costs $77.50 on the same amount, and converting there and back costs $155.
So there is a break-even point, and it is closer than intuition suggests. Assuming an in-transit cost of 1.55% and two conversions:
| Local deposit rate | Break-even holding period |
|---|---|
| 4% | about 9 months |
| 6.5% | about 6 months |
Substitute your own in-transit cost and deposit rate; the break-even moves with both.
Under these assumptions, holding below that horizon is cheap and converting twice is not worth it. Above it, the idle balance is quietly costing more than the conversion you were avoiding.
Doesn't a higher deposit rate abroad make holding obviously wrong?
No, and the reason is more interesting than it first appears.
Standard theory, known as uncovered interest rate parity, says the interest rate difference between two currencies reflects how much the higher-yielding one is expected to depreciate, so the differential should not be free money. Empirically that does not hold reliably: most studies find high-yield currencies do not depreciate as much as the spread would suggest. The strategy built on that gap, the carry trade, is still not a free lunch. Its returns are generally understood as compensation for crash risk, performing acceptably in calm conditions and badly in volatile ones.
The practical upshot is narrow. Use the forgone return to decide, because it is calculable. Treat the interest differential as compensation for taking currency risk, not as a guaranteed gain. Exchange rates are hard to forecast: a random walk without drift remains the benchmark that more sophisticated models struggle to beat.
When is holding clearly the right call?
When you will spend the money in that currency.
This is the only case that largely eliminates both costs, and it is worth stating precisely. A balance held in dollars is an asset in dollars. A future obligation payable in dollars is a liability in dollars. Held together, they move in the same direction and largely cancel, so your net exposure is close to zero on the matched portion. That is a natural hedge, it is the simplest form of hedging available to an individual, and it costs nothing.
The match only holds for the amount and the horizon that line up. Dollars held beyond what you will actually spend in dollars are exposed like any other balance.
Beyond that, holding makes sense over horizons short enough that the forgone return is small, while you wait out a weekend or a batching cycle, or when the amount is too small for either cost to matter.
When is it clearly wrong?
When the reason is a forecast.
Holding a currency because you expect it to strengthen is a position, not a plan. Whatever expectation led you there is already reflected, to some extent, in the price. This is the same reasoning that applies to waiting for a better moment to convert, and it does not improve because the money is sitting still rather than moving.
It is also wrong when the balance is large relative to your finances and the horizon is long. That combination maximises both costs at once: months of forgone return and months of exposure, on money you cannot afford to see shrink.
How do I decide, in practice?
Three questions, in order.
- Will I spend this in that currency? If yes, hold the amount you expect to spend in that currency, and apply the questions below only to the rest.
- How long will I hold it? Multiply the amount by the gap between a plausible alternative rate and whatever the balance actually earns, then by the fraction of a year. If that number is smaller than the cost of converting twice, holding costs little.
- Could an unlucky rate move cause me a problem? If yes, the exposure matters more than either calculation, and the answer is to convert regardless of what the arithmetic says.
The third question overrides the first two. All of this is about optimising a cost, and there is no version of that worth doing if an adverse outcome would leave you short.
Sources and further reading: Federal Reserve Bank of San Francisco on interest rates, carry trades and exchange rate movements; Federal Reserve Board on the random walk as a benchmark in exchange rate forecasting; CFA Institute on carry trade returns and crash risk.
This article explains the costs involved in holding a foreign currency balance. It is not financial advice and cannot account for your circumstances. Deposit rates, account terms and currency movements vary; the figures used are illustrative and the calculations are shown so you can substitute your own.