Letters of credit are conditional payment instruments — the bank pays the UK exporter only if the documents presented match the LC terms exactly. That conditionality creates an FX hedging puzzle: lock a forward contract too early (at LC issue) and you carry rate risk on a payment that may not happen if documents fail; lock too late (after presentation) and you have been exposed to rate moves through the entire shipment cycle. One widely used approach is stage-by-stage hedging that matches cover to the certainty of the underlying obligation. This guide explains how UK exporters using letters of credit can manage the FX side.
For related Business FX content, see our companion guides on FX strategy for UK exporters, forward contracts for UK businesses, forward contract vs currency option, and B2B payment terms in foreign currency.
The Short Answer
UK exporters can match LC FX hedging to four progressive stages of payment certainty:
- LC issued by buyer’s bank — payment is conditional on documentary compliance. Locking the full amount in a forward at this point carries risk, because the LC may be unworkable, amended materially, or fail at presentation.
- Goods shipped, documents prepared — payment now depends on documents matching LC terms exactly. Some exporters hedge a partial position at this stage with a forward contract to the expected presentation date.
- Documents accepted by issuing bank — payment is now firm (subject to LC payment terms: at sight, deferred, acceptance). The remaining exposure can be fixed with a forward to the actual settlement date.
- Payment received — the forward settles and the GBP equivalent is received at the agreed rate.
The discipline is in matching the hedging instrument to the certainty of the underlying obligation — not in covering the full amount from LC issue through to settlement. Both extremes (no hedge until receipt, or a full forward at LC issue) carry trade-offs that this guide sets out.
A Quick Refresher: How Letters of Credit Work
A letter of credit is a payment instrument issued by the buyer’s bank (the issuing bank) committing to pay the seller (the beneficiary) a defined amount in a defined currency, provided the seller presents specific documents within a defined time frame. The exporter’s bank typically acts as the advising bank (passing the LC to the seller) and may also act as confirming bank (adding its own undertaking to pay).
The LC operates under the Uniform Customs and Practice for Documentary Credits (UCP 600), published by the International Chamber of Commerce and accepted globally as the governing rules.
Three common LC types UK exporters encounter:
- Sight LC — payment due upon presentation of compliant documents.
- Deferred payment LC — payment due at a defined future date (e.g. 60 days after presentation).
- Acceptance LC — buyer’s bank accepts a draft drawn by the seller, payable at the future date.
Each type creates a different FX exposure profile: sight LCs have a short post-presentation rate-risk window; deferred and acceptance LCs add weeks or months of additional rate risk between presentation and payment.
Why LC FX Is Different from Open-Account Exporter FX
Three structural features distinguish LC-based FX from routine exporter hedging.
1. Payment Is Conditional on Documents
Unlike an open-account invoice (where the buyer is contractually obliged to pay), an LC pays only on documentary compliance. Documents are frequently rejected or need amendment on first presentation, so the exposure is not firm until the documents are accepted.
2. The Timeline Has Multiple Inflection Points
From LC issue to actual payment receipt, an LC transaction passes through: LC issuance, possible amendments, shipment, document preparation, presentation, examination, acceptance, and finally payment. Each stage can affect amount or timing. A forward contract booked at LC issue assumes a precision the LC process rarely delivers.
3. Deferred LC Terms Add a Long FX Tail
A deferred-payment LC for 90 days creates a three-month FX exposure window after presentation acceptance. For a 180-day deferred LC the window is six months. Both are firm exposures once documents are accepted, and a forward contract matched to the deferred payment date is the instrument most closely aligned to them.
The Stage-by-Stage Hedging Framework
Stage 1: LC Issued (Conditional Period — Pre-Shipment)
The LC has been issued by the buyer’s bank. The exporter has a contingent right to be paid if documents comply. Production may not have started; shipment is weeks or months away.
Options at this stage:
- No forward on the full amount yet — the LC may be amended materially during production, discrepancies may require amendment, or the buyer may cancel before shipment.
- A small partial forward on the most certain portion, where production is committed and the issuing bank is well known to the exporter.
- A currency option on the full amount, for exporters willing to pay a premium for protection while keeping flexibility if the deal falls through.
Options are less common at SME scale at this stage, because the premium can outweigh the rate-risk concern on a deal that may not proceed.
Stage 2: Goods Shipped, Documents in Preparation
The goods are now en route or delivered. Documents (commercial invoice, bill of lading, certificate of origin, inspection certificate) are being prepared. Payment now depends on documents matching LC terms exactly.
Options at this stage:
- A forward contract on part of the LC amount to the expected presentation date — the shipment is committed, so the exposure is increasingly likely to crystallise, but documentary discrepancies can still cause delays or rejection.
- Forward tenor matched to expected payment date — for sight LCs this is shortly after presentation; for deferred LCs it is presentation plus the deferral period.
The size of the partial cover reflects the exporter’s own discrepancy risk. Exporters with experienced trade finance teams and a clean documentation history may cover more; those dealing with new buyers or unfamiliar issuing banks may cover less.
Stage 3: Documents Accepted by Issuing Bank
The issuing bank has examined the documents and confirmed they comply with the LC terms (or any discrepancies have been waived by the buyer). Payment is now firm and only the timing depends on the LC payment terms.
Options at this stage:
- A forward contract for the remaining amount to the actual settlement date — the obligation is now firm.
- For deferred LCs, the forward tenor matches the deferred payment date (60, 90 or 180 days as specified in the LC).
- For acceptance LCs, the bank-accepted draft is a bankable receivable; some exporters discount it for early payment, in which case the FX exposure ends earlier and the hedge timing changes.
Stage 4: Payment Received
The forward settles and the exporter receives the GBP equivalent at the agreed rate. No further FX decision is needed, but operational mechanics matter — settlement timing, beneficiary verification and routing all need to align with the payment date.
A Worked Example: €1.5m Sight LC for a UK Engineering Exporter
This is an illustrative example, not a real client. A UK engineering exporter ships €1.5m of equipment to a Saudi Arabian buyer under a sight LC issued by a Saudi bank and advised through the exporter’s UK bank. Production takes eight weeks, shipment is from Felixstowe, presentation is expected ten weeks after LC issue, and payment follows five days after documents are accepted. All rates are illustrative and, for simplicity, forward points are ignored.
Stage 1 — LC Issued (Week 0)
At an illustrative GBP/EUR rate of 1.18, the €1.5m LC is worth about £1,271,000. Production has not started and the LC terms are being reviewed.
Action: no forward contract yet. The exporter’s trade finance team reviews the LC and negotiates any amendments with the buyer in weeks one and two.
Stage 2 — Production Underway, Shipment Imminent (Week 6)
Production is on schedule for week eight, shipment is booked for week nine and presentation is expected in week ten. GBP/EUR has moved to 1.16. For an exporter selling euros this is a favourable move, because each euro now buys more pounds.
Action: the exporter books a forward for €1m (about two-thirds of the LC) at 1.16, to the expected presentation date plus a short sight-payment buffer. That fixes £862,069 and leaves €500k open in case of documentary delays.
Stage 3 — Documents Accepted (Week 11)
Documents were presented in week ten and accepted in week eleven. Payment is now firm and due in five days. GBP/EUR has moved to 1.17.
Action: the exporter books the remaining €500k at 1.17, fixing £427,350. The firm payment is now fully covered.
Stage 4 — Payment Received (Week 12)
The Saudi bank pays the LC and the two forwards settle, delivering £1,289,419 in total. Converting the whole €1.5m at 1.17 on receipt would have produced £1,282,051, so in this example the staged approach received about £7,400 more.
That result depended on the direction of the market. Had GBP/EUR fallen to 1.14 by week twelve, converting everything at spot would have produced £1,315,789 — about £26,400 more than the hedged position. The purpose of staged hedging is certainty over most of the proceeds while the payment is still conditional, not a guaranteed better rate.
When LCs Go Wrong: Discrepancies and Their FX Impact
Discrepancies are one of the largest practical FX risks on LC transactions. Common discrepancies on first presentation include:
- Late presentation (after the LC expiry or shipment date).
- Document inconsistency (e.g. invoice description doesn’t match LC).
- Missing or incorrect signatures.
- Incorrect transport document (e.g. ocean bill of lading instead of multimodal).
- Insurance coverage gaps.
When documents are discrepant, the issuing bank can either reject (in which case payment depends on the buyer agreeing to waive the discrepancies) or pay under reserve (with the buyer’s explicit waiver). The timing of resolution can extend the FX exposure window by days or weeks.
If the exporter has booked a forward contract for the original presentation date and discrepancies extend the timeline, the forward may need to be rolled forward (extended to the new payment date, with an adjustment reflecting the rate at the original settlement date). Forward extensions are a standard operational matter with FCA-authorised payment providers.
The implication for the staged framework: the partial forward in Stage 2 is sized to allow for discrepancy-related delays. Booking 100% at Stage 2 commits the full FX position before document acceptance is confirmed.
Confirmed vs Unconfirmed LCs and the FX Implications
An unconfirmed LC depends solely on the issuing bank’s undertaking to pay. A confirmed LC adds a second undertaking from a confirming bank (typically in the exporter’s country), making payment more certain and reducing country risk on the issuing bank’s jurisdiction.
FX implications:
- Confirmed LCs reduce the risk of non-payment due to issuing bank or country issues, so the exposure is more predictable and some exporters cover more of it at Stage 2.
- Unconfirmed LCs from emerging-market banks carry more uncertainty, which tends to mean lower partial cover at Stage 2 and stronger documentation discipline.
Confirmation fees vary with the issuing bank’s country risk and the LC term, and are usually borne by the exporter as a trade finance cost. Confirmation does not affect the exchange rate; it only affects the certainty that the payment will arrive.
Practical Steps to Set Up an LC FX Programme
Six practical steps for a UK exporter establishing structured FX management on LC business.
- Document the LC FX hedging policy. Stage definitions, cover levels per stage, approved instruments and authority levels, approved at finance-director level and integrated into the broader FX policy framework.
- Maintain documentation discipline. Pre-presentation document review, alignment with LC terms, and a named documentary credits specialist (in-house or via the exporter’s bank). Fewer first-presentation discrepancies means fewer forward extensions.
- Confirm your FX provider supports staged hedging. Partial forwards, forward extensions and short-tenor execution are the capabilities that matter. See our guide to choosing a currency broker.
- Review LC terms for FX-friendly structure. Currency choice, presentation period length, payment terms (sight vs deferred) and expiry buffer all affect the hedging programme.
- Track the LC pipeline against forecast. A rolling pipeline showing expected issue, shipment, presentation and payment dates feeds FX forecasting and cover monitoring.
- Report at board level. LC FX gain/loss attribution, cover ratio, discrepancy rate and total LC volume by stage are material to operating performance for export-led businesses.
The exporters who handle LC FX most smoothly tend to combine two things: a documented stage-by-stage hedging policy, and documentary discipline that keeps first-presentation discrepancies low. Together they protect both the cash flow and the rate.
Common Mistakes UK Exporters Make on LC FX
Hedging the full LC amount at issue. This creates speculative exposure if the LC is amended, the deal falls through, or documents fail at presentation.
No hedge until payment receipt. Converting 100% at spot on receipt leaves the rate open for the whole cycle, often eight to twelve weeks. On a €1.5m LC worth about £1.27m, a 3% adverse move is roughly £38,000.
Converting by default wherever the LC is administered. The bank handling the LC does not have to convert the proceeds. The FX leg can be priced separately, and on a large settlement it is worth asking any provider what margin is built into the rate.
Not extending forwards when LCs slip. Document discrepancies extend the payment date by days or weeks. A forward can usually be extended to the new date rather than closed out and re-booked.
Treating deferred LCs like sight LCs. A 90-day deferred LC has a 90-day FX exposure window after presentation acceptance. The forward tenor needs to match the deferred payment date, not the presentation date.
Inadequate documentary review pre-presentation. Discrepancies on first presentation extend timelines and create FX uncertainty. A pre-presentation review by an in-house or bank documentary credits specialist is a low-cost safeguard.
No formal LC FX policy. Without a documented policy, hedging decisions become ad hoc, inconsistent and dependent on individual judgement.
Frequently Asked Questions
How do UK exporters manage FX on letter of credit transactions?
A common method is stage-by-stage hedging that matches cover to the certainty of the underlying obligation: little or no forward cover at LC issue (the LC is conditional), partial cover once goods ship, the remainder once documents are accepted, and settlement at the agreed rates when payment arrives.
When should I hedge an LC payment with a forward contract?
Many exporters avoid full cover at LC issue, because the LC is conditional on documentary compliance, and add cover progressively as payment becomes more certain: partial cover at shipment, full cover once the issuing bank accepts the documents. The principle is matching the instrument to the certainty of the obligation.
What’s the difference between a sight LC and a deferred-payment LC for FX purposes?
Sight LCs pay within days of document acceptance, creating a short post-acceptance FX exposure window. Deferred-payment LCs pay at a defined future date (60, 90 or 180 days), creating a longer exposure that suits a forward matched to that date. Both are firm exposures from acceptance, but the deferred LC needs a longer-tenor hedge.
Should UK exporters use confirmed or unconfirmed LCs?
It depends on the issuing bank’s country risk and credit profile. A confirmed LC adds a second undertaking from a UK or other confirming bank, reducing payment risk and making the FX exposure more predictable. The confirmation fee is a trade finance cost, weighed most often for emerging-market or higher-risk issuing banks.
How do discrepancies on LC presentation affect FX hedging?
Discrepancies extend the timeline between presentation and payment, sometimes by weeks. If a forward contract is booked for the original payment date, it typically needs to be extended (rolled forward) to the new date. Forward extensions are a standard operational matter with FCA-authorised payment providers.
How is the FX cost on an LC settlement priced?
The main cost is usually a margin built into the exchange rate rather than a separate fee, so it does not appear as a line item. Asking any provider for the margin against the mid-market rate makes quotes comparable. As illustrative arithmetic, each 0.5% of margin on a €1.5m settlement at 1.17 is about £6,400.
Can a specialist currency broker handle the FX leg of an LC transaction?
Yes. The FX execution is operationally separate from the LC payment mechanics. The LC is administered through banks (issuing, advising, confirming, negotiating), but the conversion of the LC proceeds can be carried out through any UK-authorised provider, including a specialist currency broker working with FCA-authorised payment partners.
Should UK exporters hedge LCs from new or unfamiliar buyers differently?
Often, yes. New buyer relationships, unfamiliar issuing banks or higher-risk jurisdictions tend to mean lower partial cover before document acceptance and stronger documentary discipline. Established relationships with a clean documentation history can support higher cover earlier.
Planning the FX side of an LC programme and want your hedging to line up with your shipment and presentation timelines? Speak to a Cambridge Currencies specialist about partial forwards, forward extensions and how the FX leg fits alongside your trade finance. Request a quote — every transaction is completed by phone with a dedicated specialist.
This guide is general information, not a personal recommendation. Letter of credit transactions involve documentary, legal and operational complexity that varies by jurisdiction, issuing bank and commercial arrangement; for material LC transactions, speak to qualified trade finance specialists and legal advisers. UCP 600 governs international LC practice and should be read alongside local legal frameworks. Cambridge Currencies Ltd is not directly authorised by the FCA; it operates with FCA-authorised payment partners Currencycloud (FRN 900199) and ScioPay (FRN 927951).
