Every procurement budget denominated in rupees that covers import-sourced categories carries a silent exposure: the assumption that the exchange rate will remain what it was when the budget was set. It rarely does. The rupee has moved more than 5% against the US dollar in 9 of the last 15 years. The organisations that are surprised by this are the ones who never calculated their exposure before the year began.

Why Forex Is a Procurement Problem

Finance teams manage currency exposure at the entity level. Procurement teams manage it at the category level — where the actual purchasing decisions that create the exposure are made. A procurement team that does not know its forex exposure by category cannot contribute meaningfully to the hedging conversation. They can report what they spent in rupees. They cannot tell the CFO which categories are creating which portion of the exposure, or which ones are sensitive enough to justify forward contract coverage.

“The rupee moved 3%. Model exactly what that does to your landed cost, your margins, and your next PO before the invoice arrives — not after.”

The Gross-to-Net Calculation

Gross forex impact is the straightforward multiplication: import spend times the depreciation percentage. The number that matters for P&L planning is the net unhedged impact — after subtracting the portion covered by forward contracts, currency options, or natural hedges, and after the amount that can be recovered through customer price revisions.

For most Indian manufacturers sourcing imported inputs, the realistic pass-through to customers is 10–30% of the impact — dependent on competitive intensity and contractual rigidity. The remainder is absorbed as margin erosion. Expressed in basis points of gross margin, even a moderate depreciation of 5% on a ₹1.8Cr annual import spend can erase 200–400 basis points of margin on the relevant product lines — a figure that changes pricing decisions, supplier negotiations, and hedging investment priorities.

Using This Calculator Operationally

Run this model at the start of every budget cycle and whenever the rupee moves more than 2% in either direction. The output — net unhedged impact in rupees — is the number you bring to the hedging conversation with treasury. It converts a treasury abstraction into a procurement budget line. It also informs supplier negotiation strategy: categories with high forex exposure and low pass-through ability are the ones where domestic sourcing alternatives are worth qualifying, even at a price premium.