SME Currency Hedging: How Much to Cover

Once a small business already has a dated foreign invoice, the next question is not “what is a hedge?” It is how much of that cash flow to stabilize. Covering all of next year’s guessed spend is not automatically safer. Covering none of a deposit that would erase the margin on the order is not automatically cheaper. This page is about sizing the cover. How a forward works, and how natural matching shrinks the residual, live in those explainers. CurrencyCentral does not sell cover or pick a ratio for you.

Cover the known slice, not the annual guess

A hedge ratio is only as honest as the cash flow underneath it. A signed purchase order due in 60 days is a known payable. A pipeline of “we usually import about €400,000 a year” is a forecast. Public treasury practice treats those differently: you can discuss a dated instrument for the first; the second still changes when orders slip, SKUs drop, or the supplier switches invoice currency.

Write the exposure first — currency, amount, expected date, and how firm it is. That list is the same discipline as the FX risk management framework. Coverage is a percentage of that line, not a percentage of last year’s revenue. If you are still deciding whether FX is even a problem, start with 7 signs you need an FX risk strategy and whether hedging is worth it before you size anything.

Materiality decides the floor, not a market view

Ask what a normal move in the pair would do to the job. If a one- or two-percent swing is larger than the margin on that order, more of that order belongs in the “we want the converted amount known” column. If the same swing is noise next to a fat wholesale mark-up, leaving the invoice on spot can be a written choice, not a failure.

That is not a forecast of EUR/USD. It is a budget tolerance. Rates move for reasons laid out in what moves currency rates. Sizing cover from “I think the dollar will strengthen” is speculation. Sizing it from “this payable can break the cash plan” is operations. The same honesty problem shows up when a frozen rate sits inside a cash-flow forecast.

Example amounts only. They are not a recommended ratio, not a live quote, and not a CurrencyCentral rate.

Match first; cover the leftover

If you already earn in the same currency you must spend, matching those legs reduces the notional that ever needs a contract. That leftover is the only amount a coverage conversation should be about. Holding a multi-currency balance “somewhere on the books” is not a match unless the date works too.

Partial cover is how many treasuries handle date or quantity risk. You agree a converted amount for the core you cannot miss, and you accept spot — or a later decision — on the uncertain tail. That is planning. It is not a claim that the uncovered slice will “get a better rate.”

A coverage checklist

• Invoice currency, amount, and how firm the date and quantity are.
• Whether foreign income in that currency already covers part of the bill.
• What a normal pair move would do to margin on that job.
• Who can approve a dated agreement above your materiality line.
• A daily ECB midpoint from the converter before you compare any all-in provider number.

Provider pricing still matters on the slice you do cover. The gap between a reference midpoint and the all-in rate is often larger than a named fee. See hidden FX spreads. For pair context, open today's top currency pairs.

The bottom line

How much to cover is a cash-flow question, not a market call. Start from the dated, material slice you actually owe. Reduce it with matching where the calendar allows. Cover a portion when certainty on the core matters more than staying open. Leave incidental or date-uncertain flows on spot on purpose. CurrencyCentral is a reference midpoint for that comparison, not a desk that will size the hedge. How this site treats rates as information is on About. More operating guides sit on the blog index.

Frequently asked questions