Currency Hedging Cost Calculator
Estimate the total cost of hedging a foreign currency exposure using a forward contract. Use this when your business invoices or pays in a foreign currency and wants to lock in an exchange rate to eliminate FX risk.
About this calculator
When a company has foreign currency exposure, it can use a forward contract to fix the exchange rate for a future transaction. The total hedging cost has three components: (1) the forward point cost, which is the difference between the forward rate and the spot rate applied to the exposure; (2) the broker spread cost, which is a percentage fee charged by the FX dealer; and (3) a carry cost that approximates the financing charge over the hedging period. The full formula is: Hedging Cost = exposureAmount × |forwardRate − spotRate| + (exposureAmount × brokerSpread / 100) + (exposureAmount × 0.001 × hedgingPeriod / 365). The carry cost component uses a fixed rate of 0.1% annualised (0.001) as a proxy for administrative and opportunity costs. Understanding each component helps treasurers compare hedging instruments and decide whether the protection is worth the premium.
How to use
Suppose a UK importer owes $500,000 in 90 days. The spot rate is 1.2500 USD/GBP, the 90-day forward rate is 1.2450, the broker spread is 0.10%, and the hedging period is 90 days. 1. Forward point cost: $500,000 × |1.2450 − 1.2500| = $500,000 × 0.005 = $2,500 2. Broker spread cost: $500,000 × (0.10 / 100) = $500 3. Carry cost: $500,000 × 0.001 × (90 / 365) = $123.29 4. Total hedging cost: $2,500 + $500 + $123.29 = $3,123.29 This $3,123.29 is the all-in cost of locking in the forward rate for this exposure.
Frequently asked questions
What is the difference between the spot rate and the forward rate in hedging costs?
The spot rate is the current market exchange rate for immediate delivery of a currency, while the forward rate is the agreed rate for a transaction that settles at a future date. The difference between them — known as the forward premium or discount — reflects the interest rate differential between the two currencies. When the forward rate is lower than the spot rate (a forward discount), the hedger pays extra relative to today's rate, and this spread is a direct component of the hedging cost. Understanding this gap is essential because it can make hedging expensive in high-interest-rate environments.
How does broker spread affect the overall cost of a currency hedge?
The broker spread is the markup an FX dealer charges above the interbank mid-rate, expressed as a percentage of the notional exposure. Even a small spread of 0.10–0.20% can add up to significant sums on large exposures — a 0.10% spread on a $1,000,000 position costs $1,000. Brokers widen spreads on less liquid currency pairs or during volatile market conditions, so it pays to shop around or negotiate tighter spreads when hedging large amounts. Always request an all-in quote and decompose it into its spread and forward-point components.
When should a business use a forward contract instead of other hedging instruments?
Forward contracts are best suited for businesses with known, fixed future cash flows in a foreign currency — for example, a confirmed export invoice or an import purchase order with a set amount and settlement date. They provide certainty of cost with no upfront premium, unlike currency options which require an upfront payment. However, forwards are inflexible: if the underlying transaction changes in size or timing, the hedge may need to be unwound at a potentially unfavourable rate. Companies with uncertain exposure volumes often prefer options or a combination of both instruments to retain some flexibility.