Exchange Rate Margin Calculator

Only the net exposure matters.

Only the net exposure matters. Costs in the same currency as your revenue are a natural hedge, so only the net exposure carries risk.

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

Monthly revenue in the foreign currency

Rate in your budget

Rate achieved

Costs incurred in that currency

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 variance

$3,288

rate moved -5.93%

Net exposure66,000

At budget rate$52,174

At actual rate$55,462

Annualised variance$39,459

Only the net exposure matters, costs in the same currency are a natural hedge. Moving 18,000 of costs into the currency you earn in removes that much exposure at no cost, which is the cheapest hedging available.

How the Exchange Rate Margin Calculator works

Costs in the same currency as your revenue are a natural hedge, so only the net exposure carries risk. Moving costs into the currency you earn in removes that much exposure at no cost, which is cheaper than any hedging instrument.

Also known as: rate spread calculator · mid-market rate comparison · true exchange rate cost

Isolating the currency effect

When a margin falls, several things could be responsible: supplier price increases, freight, mix, discounting, or currency. Separating them is what makes the response correct rather than a guess.

The currency component is isolable. Recalculate the current period's margin using the prior period's exchange rate. The difference between that and the actual margin is the currency effect; everything else is operational.

This is worth doing before reacting. A margin that fell three points where two of them are currency needs a pricing or hedging response; the same fall entirely from supplier increases needs a procurement response. Treating them the same wastes effort on the wrong problem.

The lag between the rate and the margin

Currency movements do not hit the margin immediately, because inventory bought at the old rate is still selling. A business with three months of stock sees a rate move today affecting the margin in three months.

That lag is useful and is usually wasted. It is three months of warning, during which prices can be adjusted, suppliers renegotiated or hedges arranged. Sellers who only notice currency when the margin moves have already lost the warning period.

It also means the reported margin lags reality in both directions. A favourable rate move improves the margin months later, by which time the rate may have reversed. Reporting margin at the current rate alongside the actual gives a forward view rather than a historical one.

Forward contracts, and what they buy

A forward contract fixes an exchange rate for a future date. It removes uncertainty rather than guaranteeing a good outcome: if the rate moves in your favour you do not benefit.

The pricing is not a fee in the usual sense. The forward rate differs from the spot rate by the interest rate differential between the two currencies, plus the provider's margin. For major pairs over short periods the difference is small.

What matters more than the rate is the collateral. Forward contracts frequently require a deposit, and if the rate moves against the position the provider can call for more. A business that hedged £200,000 of supplier payments and receives a margin call for £15,000 in a bad week has converted a currency risk into a liquidity risk, which is a trade worth understanding before entering it.

How much to hedge

Hedging everything removes all currency risk and all currency upside, and it commits you to buying currency for orders that may not happen. Hedging nothing leaves the margin exposed.

The common approach is a layered ratio: hedge a high proportion of committed near-term purchases, a smaller proportion of likely medium-term ones, and nothing speculative. That matches the certainty of the exposure to the certainty of the hedge.

For most small sellers the honest answer is that formal hedging is disproportionate and natural hedging plus a pricing buffer is adequate. Forward contracts start making sense somewhere above a few hundred thousand of annual foreign currency exposure, below which the administrative cost and the collateral risk outweigh the benefit.

Sharing the risk with suppliers

Currency risk sits with whoever is invoiced in the foreign currency, and that is negotiable. A UK importer paying a Chinese supplier in dollars carries the risk; the same supplier invoicing in sterling would carry it instead.

Suppliers frequently resist and will sometimes agree at a price, since they then have to hedge or absorb it themselves. Whether it is worth paying for depends on whether they can hedge more cheaply than you, and for a large supplier dealing in many currencies they often can.

The middle position is a currency adjustment clause: prices fixed within a band and adjusted if the rate moves beyond it. That splits the risk, keeps prices stable in normal conditions, and avoids either party absorbing a large move alone. It is common in industrial supply contracts and rare in small-scale importing, mostly because nobody asks.

Where to go next

The Exchange Rate Margin question rarely arrives on its own. These are the ones that usually come with it:

Multi-Currency Margin Calculator — The price is fixed; the margin is not.
Currency Hedging Cost Calculator — It buys certainty, not profit.
FX Markup Calculator — A cost that never appears as a line item.
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

What is net FX exposure?

Revenue in a foreign currency less costs in the same currency. Only the difference is exposed to rate movements.

What is a budget rate?

The exchange rate assumed when the plan was made. Variance against it is how FX impact is reported, and setting it conservatively avoids unpleasant reconciliations.

How do I create a natural hedge?

Source, manufacture or spend in the currency you earn in. A business selling in euros and buying in euros has no exposure at all.

Should I hedge the remainder?

If the exposure is material relative to profit, yes. Hedging buys certainty rather than profit, and a hedge that proves unnecessary was not a mistake.