An earn-out paid in a foreign currency carries exchange-rate risk because each instalment is converted to sterling at the rate on the day it arrives — often one to three years after the sale completes. A UK seller can manage this by hedging any guaranteed portion and layering forward contracts as the amounts firm up, rather than converting a large deferred sum at a single unknown rate.
Selling a company to an overseas buyer increasingly means part of the price is deferred and contingent. When that deferred slice is denominated in dollars, euros or another currency, the sterling you eventually receive depends on where the exchange rate sits at each future payment date — not where it sat on completion day. This guide explains the mechanism, the options for managing it, and the tax timing that makes a foreign-currency earn-out different from a straightforward lump sum.
What is an earn-out, and why does it carry currency risk?
An earn-out is a portion of a business sale price that is deferred and paid only if the business meets agreed performance targets — such as revenue or profit — over a set period after completion, usually one to three years. It bridges the gap between what a seller believes the business is worth and what a buyer will commit to upfront.
The currency risk appears the moment the earn-out is agreed in a currency other than sterling. A UK founder who sells to a US acquirer may receive an upfront payment plus an earn-out of, say, up to US$2,000,000 across the following two years. That dollar figure is fixed; its sterling value is not. Every instalment is converted at the GBP/USD rate prevailing when it is paid, so the headline price and the money that actually reaches a UK bank account can differ materially.
This is the same exposure a seller faces when repatriating foreign business sale proceeds to the UK, but stretched over years and layered with uncertainty about the final amount. It is also distinct from an all-cash deal completed on a single day, where the exposure is short and the sum is known.
How does currency risk affect a foreign-currency earn-out?
The sterling value of a foreign-currency earn-out moves with the exchange rate at each payment date, and over a multi-year horizon those moves can be large. The pound against the dollar or the euro is driven mainly by the interest-rate differential between the Bank of England and the other central bank, alongside growth and risk sentiment — the same forces explained in our guide to how interest rates affect exchange rates. None of that is predictable two years out.
The maths shows the scale. Take an earn-out of US$2,000,000 and an illustrative GBP/USD rate of 1.25 at the time the deal is struck:
- At 1.25, US$2,000,000 converts to £1,600,000.
- If the pound strengthens to 1.35 by the payment date, the same US$2,000,000 is worth £1,481,481 — a shortfall of about £118,519.
- If the pound weakens to 1.15, it is worth £1,739,130 — a gain of about £139,130.
- Even a modest 2% adverse move, from 1.25 to 1.275, costs roughly £31,373 on this single instalment.
A swing of a few cents, entirely normal across a two-year window, moves the outcome by six figures. The seller agreed a dollar number; what they keep in sterling is decided by the market years later. You can track the live level on our USD to GBP page, but the point of planning is to reduce reliance on wherever the rate happens to be on payment day.
What are the options for managing currency on an earn-out?
There is no single right approach — it depends on how much of the earn-out is guaranteed, how far out the payments fall, and how much certainty the seller wants. The table below compares the main tools honestly, including their limits.
| Approach | How it works | Best suited to | Trade-off |
|---|---|---|---|
| Convert on arrival (spot) | Exchange each instalment at the market rate on the day it lands | Small or highly uncertain amounts | Full exposure to rate moves right up to payment day |
| Forward contract | Fix today’s rate for a known amount, for settlement up to 12 months ahead | A guaranteed minimum, or a near-term instalment | Cannot cover amounts beyond 12 months, or sums not yet known |
| Window forward | Fix a rate now but draw the funds across a date range | Instalments with an uncertain payment date | Priced at the least-favourable point in the window |
| Market or limit order | Set a target rate; the trade executes automatically if the market reaches it | Sellers with a rate in mind and time to wait | No guarantee the target is ever hit |
| Layering (tranching) | Add forward cover piece by piece as each instalment’s size and date become clear | Multi-year earn-outs | Needs active management across the whole earn-out period |
Most sellers end up combining these. A forward exchange contract locks the rate on the part that is certain; a window forward contract handles the timing wobble common to earn-out milestones; and a market or limit order can target a level on the uncertain remainder.
Can you hedge an earn-out when the amount isn’t fixed?
Yes — you hedge the part you are confident about and leave the genuinely uncertain part flexible. Many earn-outs have a guaranteed floor or a minimum deferred sum that is payable regardless of performance. That floor is a known amount and can be covered with a forward contract like any other fixed future payment.
For example, if US$1,000,000 of a US$2,000,000 earn-out is guaranteed, a seller can fix the rate on that US$1,000,000 — worth £800,000 at an illustrative 1.25 — and keep the contingent US$1,000,000 flexible until the performance figures are known. As each milestone is confirmed, the newly certain amount can be added to the cover. This layered approach turns one large unknown into a series of smaller, manageable decisions.
Leaving everything unhedged because “the amount isn’t certain” is the costly default. The uncertainty argues for a flexible, staged plan — not for no plan at all.
Can a forward contract cover a multi-year earn-out?
A single forward contract usually cannot span a full multi-year earn-out, because forward contracts at Cambridge Currencies run up to 12 months. An earn-out paid in year three sits beyond that horizon, so it cannot be fixed today with one contract to the final payment date.
In practice this is handled by layering. A seller covers the nearest instalment with a forward now, then books further cover as each subsequent instalment moves inside the 12-month window. The forward rate itself is not a fee or a prediction — it reflects the interest-rate difference between the two currencies, as explained in our guide to why a forward rate differs from the spot rate. Understanding that difference helps a seller judge whether fixing early is attractive on a given instalment.
When is an earn-out taxed — at the sale or when the money arrives?
For UK capital gains tax, much of an earn-out is generally taxed at the time of the sale, not when the cash arrives — which can create a mismatch with a foreign-currency payment that lands years later. The treatment turns on whether the deferred consideration is “ascertainable” or “unascertainable”.
Where the deferred amount is fixed at completion but simply paid later (ascertainable), HMRC brings the full amount into the capital gains computation at the date of disposal, with no discount for the delay; the rules allow a later adjustment if part proves irrecoverable (see HMRC’s Capital Gains Manual CG14850 and section 48 of the Taxation of Chargeable Gains Act 1992). Where the amount depends on future performance (unascertainable — the classic earn-out), the right to receive it is treated as a separate asset, valued and taxed at completion; when the earn-out is later received, that right is disposed of, producing a further gain or loss. This follows the principle in Marren v Ingles, set out in HMRC’s Capital Gains Manual CG14990.
The currency angle matters here: a sterling tax charge can crystallise at completion on a value estimated in pounds, while the actual cash arrives later in a different currency at a different rate. The gain is computed in sterling throughout, and for individuals there is usually no separate capital gains charge on foreign currency simply held in a bank account — a point covered in our guide to tax on foreign currency gains. This is general information about how the rules work rather than a substitute for professional tax guidance; earn-out taxation is complex and the figures depend on your circumstances, so a qualified tax adviser should confirm the treatment before you complete.
Common mistakes when managing currency on an earn-out
- Treating the earn-out like a fixed lump sum. The money is not in hand yet and the amount may change, so converting the whole figure in your head at today’s rate sets a false expectation.
- Agreeing the earn-out in the buyer’s currency without modelling the sterling range. Run the numbers across a realistic band of rates before you sign, so the floor and the downside are known.
- Leaving everything unhedged because the amount is uncertain. Any guaranteed floor can be fixed now; only the truly contingent part needs to stay flexible.
- Expecting one forward to cover a three-year earn-out. Cover runs up to 12 months, so a multi-year payout is layered as instalments come into range.
- Overlooking the tax-versus-cash timing. A sterling tax charge can fall due before the foreign-currency cash arrives; plan the two together with a tax adviser.
- Converting each instalment through a high-street bank. A wide spread on a six- or seven-figure instalment quietly erodes the proceeds you negotiated so hard for.
How does a specialist currency broker help with an earn-out?
A specialist broker helps a seller turn an open-ended foreign-currency exposure into a planned sequence of decisions. That means mapping each instalment and its likely date, identifying the guaranteed floor that can be fixed immediately, and setting out when to layer further cover as the contingent amounts are confirmed. The same discipline applies whether you are selling a UK business and moving abroad or staying put and receiving a large payment from overseas.
Cambridge Currencies is a UK specialist currency broker that works with high-value private and corporate clients on large, deferred and cross-border payments, including deal proceeds and earn-outs on both sides of a transaction — the buyer’s view is covered in our guide to FX for UK business acquisitions and M&A. Funds are safeguarded by our FCA-authorised partners Currencycloud and ScioPay at a credit institution, every transfer is completed by phone with a dedicated specialist, and the minimum transfer is £5,000. For context on the receiving leg, see our guide to the UK–USA transfer corridor.
Frequently asked questions about earn-out currency risk
What is an earn-out in a business sale?
An earn-out is a deferred, performance-linked part of a sale price. The buyer pays it only if the business hits agreed targets — typically revenue or profit — over a period after completion, usually one to three years. It lets a buyer and seller bridge a gap in valuation by tying part of the price to actual results.
How does currency risk affect an earn-out paid in dollars or euros?
Each instalment is converted to sterling at the exchange rate on the day it is paid, which may be one to three years after the deal. Because that rate can move several percent, the sterling value of a foreign-currency earn-out can end up well above or below the amount implied by the rate on completion day.
Can you hedge an earn-out if you don’t know the final amount?
You can hedge the part you are confident about. Any guaranteed floor or minimum deferred sum is a known amount and can be fixed with a forward contract, while the contingent portion stays flexible until the performance figures are confirmed. Cover is then layered on as each instalment’s size becomes certain.
Can one forward contract cover a multi-year earn-out?
Usually not, because forward contracts run up to 12 months. An instalment due in year two or three sits beyond that window, so it cannot be fixed today with a single contract. Instead, sellers layer cover — booking a forward on each instalment as it moves inside the 12-month horizon.
Is an earn-out taxed when the business is sold or when I receive the money?
For UK capital gains tax, much of an earn-out is generally brought into charge at the time of the sale rather than when the cash arrives. Fixed-but-deferred amounts are taxed at completion; a performance-linked earn-out is taxed via the value of the right to receive it, with a further gain or loss when it is paid. The treatment is complex, so confirm it with a qualified tax adviser.
What happens to my earn-out currency if I move abroad after the sale?
Moving abroad does not remove the exchange-rate exposure — you may simply be converting into a different home currency, and UK tax can still apply under the temporary non-residence rules if you return within the relevant period. The currency planning and the tax position should be mapped together before you relocate; a qualified tax adviser can confirm your residence position.
How can Cambridge Currencies help with an earn-out?
A dedicated specialist maps each instalment, identifies the guaranteed amount that can be fixed now, and sets out when to layer further cover as the contingent parts are confirmed. All transactions are completed by phone, and funds are safeguarded by FCA-authorised partners. It turns an uncertain multi-year exposure into a clear, staged plan.
Plan the currency on your deferred proceeds
If part of your sale price is deferred in a foreign currency, speak to a Cambridge Currencies specialist about structuring the cover around your earn-out milestones. You can request a currency quote to start the conversation, and every plan is agreed by phone with a dedicated specialist who knows your deal.
