Currency Adjustment Clause (FX Sharing Band) Calculator
A currency adjustment clause decides who carries exchange rate risk on a cross border order. This calculator shows the price under a band and sharing arrangement, next to the price you would pay at the spot rate.
Your numbers
Contract value in the supplier's currency, for example EUR.
Rate fixed in the contract, expressed as units of your currency per unit of the supplier's currency.
Moves inside this band are absorbed with no adjustment.
Share of the move beyond the band that changes the price.
Your results
The clause is assumed to price in your currency and adjust once at the adjustment date. Real clauses often use average rates over a period, a lagged source such as a central bank rate, and separate treatment of increases and decreases.
Clause price vs spot price across exchange rates
Sweeps Exchange rate at adjustment from 0.8 to 1.4, holding your other inputs fixed.
FX exposure on open purchase orders
Optional: see how open order exposure by currency can be reported from your ERP.
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How to use it
Enter the supplier price in their currency, the base rate in the contract, and the rate at the adjustment date. Set the band and the percentage of the excess move that is passed on. The tool compares the price you pay under the clause with the price at spot, so you can see how much of the risk the clause actually transfers. Slide the exchange rate to see the range of outcomes before you agree the band.
- Express rates in the same direction as the contract, units of your currency per foreign unit.
- Name the rate source and fixing time in the clause.
- Test both a stronger and a weaker foreign currency.
The formula
Contract price at the base rate equals the foreign price times the base rate. The exchange rate move equals current rate divided by base rate minus one. The excess keeps the direction of the move and removes the band. The price adjustment equals the base price times the excess times the sharing percentage. The clause price equals base price plus adjustment. The spot price is the foreign price times the current rate. Comparing the two shows how much risk the clause leaves with each side.
Reading the result
Inside the band, you pay the base price whether the rate moves or not, so the supplier carries the risk. Beyond the band, the sharing percentage decides the split. A fifty percent share means you take half of the movement beyond the band. A hedge or forward contract can complement the clause by fixing the rate for the purchase, but a clause is often easier to agree and avoids hedging cost on small orders.
Common mistakes
The most common mistake is misreading the direction of the quote, for example mixing EUR per USD with USD per EUR. Another is leaving the rate source or timing undefined. Keep the base rate, band and sharing percentage on the contract record, and make sure the ERP posts the actual rate used on each purchase order and invoice so that FX differences can be reconciled.
Frequently Asked Questions
What is a currency adjustment clause?
It is a contract term that changes the price when the exchange rate moves beyond an agreed range from a base rate. It spreads currency risk between buyer and supplier instead of leaving it with one party.
How is it different from hedging?
Hedging uses a financial instrument, such as a forward, to fix a rate. A clause changes the contract price itself. Both can be combined. A clause avoids hedging cost but makes the final price less certain.
Which rate should be used?
Choose a published rate such as a central bank fixing or a named bank rate, and state the date and time. An average over the month can smooth volatility and reduce disputes.
Should the adjustment work both ways?
Balanced clauses do. A one way clause that only adjusts upward transfers all risk to the buyer. If you accept it, ask for a cap or a shorter adjustment period.
If you want exchange rate exposure by open purchase order, we can help build that view from your ERP purchasing and currency tables.
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