FX Markup Calculator

A cost that never appears as a line item.

A cost that never appears as a line item. An FX markup never appears as a line item on any statement, which is why it goes unexamined for years.

Written and maintained by Mohit PatelLast checked August 4, 2026How we build these

Mid-market rate

Rate you were offered

Monthly volume converted

Exchange rates move constantly and no rate is stored here, enter the current mid-market rate from a source you trust. Everything below is arithmetic on the rate you provide.

FX markup

2,403 a month at your volume

Mid-market rate1.2650

Rate offered1.2270

Markup3%

Annual cost28,838

A 3% markup costs 28,838 a year at this volume, and it never appears as a line item on any statement. Above a few thousand a month it is worth negotiating explicitly or moving to a provider that charges a stated fee instead.

How the FX Markup Calculator works

An FX markup never appears as a line item on any statement, which is why it goes unexamined for years. Putting an annual figure on it is usually enough to justify a phone call to the provider or a move to one that charges openly.

Also known as: exchange rate margin cost · hidden currency fee · how much is the FX spread costing me

Finding the markup that nobody quotes

FX markup is the difference between the mid-market rate and the rate you were actually given, expressed as a percentage. Providers rarely state it, because stating it invites comparison.

Calculating it is straightforward once you have the two numbers. Take the mid-market rate at the time of the transaction, take the rate you received, and the difference divided by the mid-market rate is the markup.

The historical mid-market rate is the input people struggle to find, and several free sources publish it by date. Doing this for a month of transactions is a couple of hours and frequently reveals a cost that nobody had quantified, because it never appears as a fee on any statement.

Typical markups by provider type

High street banks on retail currency exchange run 2.5% to 4%, and the number is higher for less common currency pairs. Business accounts are usually better than personal and rarely below 1.5% without negotiation.

Card networks convert at close to interbank, adding roughly 0.2% to 1% depending on the scheme, but the issuer then adds its own foreign transaction fee on top, typically 2.75% to 3% on consumer cards.

Specialist providers quote the mid-market rate with a separate fee, usually 0.3% to 0.7% for major pairs and more for exotic ones. Payment processors converting foreign sales generally sit around 1% to 2%, which is the cost most sellers are paying without realising because it is bundled into the settlement.

What the markup costs at volume

A 2% markup sounds small and is not. On £300,000 of annual foreign currency turnover it is £6,000, which for most small sellers is more than their entire software and subscription budget.

Moving from a 2% provider to a 0.5% provider saves £4,500 on those numbers, for the cost of opening an account. Very few operational changes offer that return for that effort.

The reason it persists is invisibility. Nobody sends an invoice for FX markup; it arrives as a slightly smaller settlement than expected, and slightly smaller is hard to notice month after month. Quantifying it once is usually enough to prompt the change.

Negotiating it down

FX markup is negotiable above a volume threshold, and the threshold is lower than most sellers assume. Providers will typically improve rates for committed monthly volumes starting in the tens of thousands.

The lever that works is a competing quote. Providers price against what they think you would otherwise pay, and a specific alternative quote moves the conversation immediately in a way that a general request does not.

Rate tiers are worth asking about explicitly. Many providers have banded pricing that is not published, and simply asking what the rate would be at double your current volume frequently reveals a tier you are close to and can reach by consolidating transfers.

Reducing the number of conversions

Every conversion costs a markup, so the cheapest FX strategy is to convert less often. A seller converting each day's takings pays the markup on every conversion; one converting monthly pays it once.

Multi-currency accounts make this possible by letting revenue accumulate in the currency it arrives in. They also allow natural hedging: paying euro suppliers from euro revenue removes two conversions entirely and the markup on both.

That last point is underused. A business with euro sales and euro costs that converts euros to sterling and back is paying markup twice for no reason. Matching currency inflows against outflows before converting the balance is free and is the single most effective FX cost reduction available to most sellers.

Where to go next

The FX Markup question rarely arrives on its own. These are the ones that usually come with it:

Currency Converter Calculator — The spread, shown as money.
Foreign Transaction Cost Calculator — Conversion is the avoidable part.
Exchange Rate Margin Calculator — Only the net exposure matters.
Etsy Fee Calculator — Every Etsy fee on one sale, itemised.

Not financial advice. Marketplace fees change, and they vary by country, plan and seller status. Every rate here is an editable default, not a quoted price, check the platform's current fee schedule before you price a product against it. This is not tax or business advice.

Frequently asked questions

How do I calculate the FX markup?

The gap between the mid-market rate and the rate you were offered, as a percentage of the mid-market rate. Multiply by your annual volume to get the cost.

What markup is typical?

Banks commonly take 2% to 4% on business transfers; card processors 1% to 4% on conversion. Specialist providers charge a stated fee at a much lower total.