What happens when you send money across borders

When you send money to another country, your payment platform does not simply wire your dollars to a foreign bank. Instead, it converts your money into the destination currency at a specific exchange rate, takes a cut for doing so, and sends the converted amount forward. The timing and cost of that conversion depend on which platform you use, when you initiate the transfer, and whether the platform holds currency in advance or converts on demand.

Most platforms offer one of two conversion models: real-time conversion, where the exchange rate locks the moment you initiate the transfer, or delayed conversion, where the rate is set when the receiving bank actually processes the payment—sometimes hours or days later. The difference between these two can cost you 1 to 3 percent of your transfer amount, depending on market movement.

Key Takeaways

  • Real-time conversion locks an exchange rate at the moment you send money, while delayed conversion uses the rate when the receiving bank processes it—a difference that can shift your total by 1 to 3 percent.
  • Payment platforms make money on currency conversion through the spread (the gap between the rate they pay for currency and the rate they charge you), not through a separate fee.
  • Mid-market rate is the true exchange rate between banks; platforms charge 1 to 5 percent above it, and traditional banks often charge 3 to 8 percent above it.
  • The platform's location, the destination country, and the currency pair all affect how quickly conversion happens and what rate you receive.
  • You can compare conversion costs by asking each platform for the all-in rate (including spread) before you send, not just the headline exchange rate.

How platforms source and lock exchange rates

Payment platforms do not create exchange rates—they source them from currency markets and banks. The mid-market rate is the true wholesale rate at which banks trade currency with each other at any given moment. It changes constantly, sometimes multiple times per second during market hours.

When you send money, the platform either locks the mid-market rate at that exact second (real-time conversion) or waits until the receiving bank settles the payment to use whatever the mid-market rate is at that time (delayed conversion). Real-time conversion protects you from rate swings; delayed conversion exposes you to them, but some platforms use delayed conversion to offer slightly better rates because they are betting the market will move in your favor.

Platforms that hold pre-funded accounts in destination currencies can offer real-time conversion instantly because they already own the foreign currency. Wise, for example, holds balances in over 40 currencies and converts from your home currency into one of those balances the moment you send. Smaller platforms or those without pre-funded accounts may have to source currency from a partner bank, which takes longer and may lock a rate only after you confirm the transfer.

The spread: where platforms make their money

Platforms do not charge a separate "conversion fee" in most cases. Instead, they profit through the spread—the difference between the mid-market rate and the rate they charge you. If the mid-market rate is 1.10 USD per EUR, a platform might charge you 1.045 USD per EUR, pocketing the 0.055 difference on every euro you convert.

Spreads vary widely. Wise and OFX typically charge 0.5 to 1.5 percent above mid-market. Traditional banks (Chase, Bank of America, Wells Fargo) often charge 3 to 8 percent above mid-market. PayPal and Square Cash charge 2 to 3 percent. A $10,000 transfer with a 2 percent spread costs you $200 in conversion markup alone, on top of any wire fees.

The spread is not fixed—it can widen during volatile market periods or when the platform is converting less common currency pairs. A transfer to a major currency (EUR, GBP, JPY, CAD) usually has a tighter spread than one to a smaller currency (PHP, THB, MXN). Some platforms also adjust spreads based on transfer size; larger transfers sometimes get better rates.

Real-time conversion versus delayed conversion

Real-time conversion is what most readers think of when they imagine "locking in" an exchange rate. You initiate the transfer, see the exact amount the recipient will receive, and that rate does not change. The platform converts your money immediately and holds it until the receiving bank is ready to deposit it. This usually takes 1 to 3 business days for transfers within the US or Europe, and 2 to 5 days for transfers to other regions.

Delayed conversion means the platform does not convert until the receiving bank actually processes the payment. You see an estimated amount when you send, but the final amount depends on the exchange rate hours or days later. If the market moves in your favor, the recipient gets more. If it moves against you, they get less. Most international wire transfers through traditional banks use delayed conversion, which is why banks often show you an estimated amount with a disclaimer that the final amount may differ.

Real-time conversion is safer for the sender because you know exactly what you are paying. Delayed conversion is riskier but can work in your favor if the currency strengthens. Most modern payment platforms default to real-time conversion because it is simpler to explain and reduces customer complaints about unexpected final amounts.

How platform location affects conversion timing

A platform's home country and banking relationships determine how fast it can convert and settle. Wise is UK-based and holds accounts in multiple currencies, so it can convert GBP to EUR almost instantly. But if you are sending from a smaller US regional bank to a currency Wise does not pre-fund, the conversion may take longer because Wise has to source that currency from a partner.

Platforms based in the US (PayPal, Square, Remitly) must route transfers through the US banking system, which adds time and sometimes requires an intermediate bank. A transfer from a US account to a Philippine bank might take 3 to 5 days because the payment has to clear through the US Federal Reserve, then through a correspondent bank, then to the destination. During that time, if conversion is delayed, the exchange rate can shift.

Platforms based in the destination country or with local banking relationships can sometimes settle faster. A UK-based platform sending to a UK bank can settle in hours. A US-based platform sending to a US bank can settle in 1 business day. But sending to a country where the platform has no local banking presence usually means routing through correspondent banks, which adds 2 to 5 days and sometimes an extra conversion step.

What to check before you send

Do not compare platforms based on the headline exchange rate alone. Instead, ask for the all-in rate—the rate you will actually receive after the spread is applied. Most platforms show this in their quote before you confirm the transfer. Write down the mid-market rate (you can check this on XE.com or OANDA) and compare it to what the platform is charging you. The difference is the spread.

Ask whether the rate is locked at the moment you send or at the moment the receiving bank processes the payment. If it is locked at send time, you are protected from rate swings. If it is locked at settlement, ask what the platform's estimate is and whether they may provide that estimate or if it can change.

Check the total cost: conversion spread plus any wire fees, plus any fees the receiving bank might charge. Some platforms charge $0 to send but the receiving bank deducts $10 to $25 from the amount received. Others charge $5 to $15 to send but the receiving bank charges nothing. The total cost is what matters.

What happens if the rate moves between send and settlement

If you use real-time conversion, the rate does not move—it is locked. The platform bears the risk that the rate will move against them between the moment they convert your money and the moment the receiving bank settles it. This is why platforms with pre-funded accounts in destination currencies can offer real-time conversion safely; they already own the currency and do not have to buy it on the open market.

If you use delayed conversion, you bear the risk. The platform quotes you an estimated amount, but the final amount depends on the rate when the receiving bank processes the payment. If the currency strengthens, you win. If it weakens, you lose. Some platforms allow you to lock a rate for a short window (usually 24 to 48 hours) even with delayed conversion, but this is rare and may cost extra.

If the rate moves significantly and you are unhappy with the final amount, you cannot reverse the conversion. Once the receiving bank has processed the payment, the conversion is complete. Your only option is to send another transfer in the opposite direction to rebalance, which costs you another conversion spread.

Frequently Asked Questions

Can I lock an exchange rate before I actually send the money?

Some platforms offer rate locks for 24 to 48 hours, but this is not standard. Wise and OFX allow you to lock a rate when you create a quote, and the rate usually holds for at least a day. Traditional banks rarely offer this. If rate locks matter to you, ask the platform directly whether they offer them and for how long.

Why do I get a different amount than what the platform quoted?

If you used delayed conversion, the exchange rate changed between when you sent the money and when the receiving bank processed it. If you used real-time conversion, the receiving bank may have deducted a fee that was not included in the platform's quote. Always ask whether the quote includes receiving bank fees before you send.

Is the mid-market rate the same everywhere?

The mid-market rate is the same across all banks and platforms at any given moment, but it changes constantly during market hours. If you check the rate at 9 AM and send at 10 AM, the rate may have shifted. This is why real-time conversion locks the rate at send time—to protect you from that shift.

Do I pay conversion fees if I send money to someone in the same country but a different currency?

Yes. If you send USD to someone in Canada, the platform still has to convert USD to CAD, and you still pay the spread. The only time you avoid conversion is if both you and the recipient use accounts in the same currency.

What is the cheapest way to send money internationally?

Wise and OFX typically offer the tightest spreads (0.5 to 1.5 percent above mid-market) and are cheapest for most currency pairs. Traditional banks are usually most expensive (3 to 8 percent above mid-market). For very large transfers, some platforms offer negotiated rates. Always get quotes from at least two platforms and compare the all-in amount the recipient will receive, not just the headline rate.