Currency exposure in sourcing: what the invoice currency does and does not protect

The currency named on the order is a commercial choice

Whichever party carries the currency between agreement and payment charges for doing so, whether or not that charge is visible. A supplier asked to quote in the buyer's currency will build a buffer into the price, sized by how volatile the pair is and how sophisticated the supplier's own treasury is. Small manufacturers with no banking relationship for forward cover build a large buffer; exporters who sell widely build a small one. Ask for a quotation in both currencies. The gap between them is the price the supplier is charging for the risk, and it is negotiable like anything else.

Exposure that survives being invoiced at home

A supplier invoicing you in your own currency still buys its resin, its steel, its electricity and possibly its imported sub-components in something else. When the supplier's home currency weakens against its own input currencies, its costs rise and it will come back for a price increase regardless of what the contract says. This second-order exposure is invisible on your ledger and shows up as commercial pressure instead of as a variance. Where a supplier's own inputs are largely imported, invoice currency offers thin protection, and a longer price-hold commitment is worth more than the currency it is denominated in.

Matching purchases against sales before touching a bank

Structural protection costs the least. If a share of your output is sold in the same currency you are buying in, those flows partly cancel and only the net position needs managing. Manufacturers frequently discover, once someone looks, that sales and purchasing have been hedging opposite sides of the same pair without knowing. Building the netting picture requires purchasing to publish forward committed spend by currency, at the same granularity and calendar that sales uses for its order book. That single piece of housekeeping usually delivers more than any clever clause, and it costs nothing but coordination.

Working with treasury without pretending to be treasury

Procurement should not be taking positions, but it holds the information treasury needs: which commitments are firm, which are forecast, when payment will actually fall due, and how much of a forecast will realistically convert. Forward cover placed against an over-optimistic purchasing forecast creates its own problem when the volume does not arrive. Agree a routine: a committed-spend view by currency and settlement period, a stated confidence level, and prompt notice when a large commitment is cancelled or brought forward. Treasury then decides the instrument, and procurement stops guessing at rates it has no business forecasting.

Currency clauses and the point at which price reopens

For long-running supply agreements, a currency adjustment clause performs the same job as a material index: it defines in advance what happens rather than leaving it to a difficult conversation. The design questions mirror indexation — which reference rate, averaged over what period, applied beyond what movement, and symmetric in both directions. Set the trigger wide enough that ordinary noise does not generate repricing, and specify the source of the rate precisely, since bank and central bank fixings differ. Where a supplier refuses any clause but keeps requesting increases when the market moves, you already have an asymmetric arrangement without the paperwork.

Frequently asked questions

Is it better to pay a foreign supplier in their currency or in ours?

Neither is universally better; the question is who can carry the risk more cheaply. If your business already holds or earns that currency, or your treasury can obtain cover at a good rate, buying in the supplier's currency usually costs less because you remove their buffer. If you have no capacity to manage the position and the amounts are modest, paying in your own currency converts an unmanageable variable into a known price, which has real value. Ask for both quotations and compare the difference against what cover would cost you.

How do we stop a supplier requesting a price increase every time rates move?

Write the mechanism down before it is needed. A defined clause with a movement threshold, an averaging period and symmetry in both directions replaces an argument with a calculation, and it commits the supplier to reductions as well as increases. Without a clause, requests arrive one-sidedly and are hard to refuse when the movement is genuinely large. Also agree a price-hold period at each renewal so the number is stable for a known window, which matters more to production planning than the exact level.

Does a longer payment term change our currency exposure?

It extends it. The exposure runs from the point the price is fixed to the point the payment settles, so a longer term keeps the position open for longer and increases the amount of movement it can absorb. That interacts with any forward cover, which has to be dated against actual settlement rather than invoice date. If terms are being extended for working capital reasons, tell treasury, because cover placed against the previous assumption will now mature at the wrong time.