What it means
The arrangement is really two separate credits that happen to be linked in commercial reality. The first, usually called the master credit, is opened by the end buyer's bank in favour of the trading intermediary; the second, the back-to-back credit, is opened by the intermediary's bank in favour of the supplier who actually makes or grows the goods.
The structure exists because traders and agents rarely hold enough working capital to buy a full shipment before they get paid. A trading house with modest cash reserves can move a $500,000 container load simply by passing the security it already holds down the chain to its supplier.
Banks treat the two credits as separate legal obligations, and that is where the tension sits. The bank issuing the second credit must pay the supplier when compliant documents arrive, even if the end buyer later argues about quality or the master credit is never drawn on.
Because of that exposure, banks insist the two credits mirror each other closely on goods description, shipment dates and required documents. The permitted differences are the amount, which is lower on the supplier side so the trader keeps a margin, and the expiry date, which falls earlier so documents can be swapped in time to present under the master credit.
A transferable letter of credit achieves a similar result with only one instrument, and banks generally prefer it because they carry less risk. Back-to-back credits are the fallback when the end buyer refuses to make the master credit transferable, often because the trader does not want its supplier's identity revealed.
In practice
Real-world examples.
Example
A Singapore-based commodity trader wins a $2,000,000 order for palm oil from a German soap manufacturer. Its bank opens a back-to-back credit for $1,760,000 to a Malaysian refinery, using the German buyer's credit as collateral, and the trader keeps $240,000 of margin without putting up cash.
Example
A UK textile agent sources fabric from three mills in Turkey for a fashion retailer. Because the retailer will not agree to a transferable credit, the agent's bank issues three separate back-to-back credits totalling $640,000 against a single master credit of $720,000.
Example
A machinery reseller in Dubai buys refurbished packaging lines from an Italian workshop for resale in East Africa. The end buyer's bank issues a master credit expiring on 30 November, so the back-to-back credit is set to expire on 10 November, giving the reseller three weeks to swap invoices and present documents.
Formula
Calculation
Trader's gross margin = master credit amount - back-to-back credit amount
Net margin = gross margin - total bank charges
An agricultural trading house receives a master letter of credit for $500,000 from a European food processor's bank. It arranges a back-to-back credit of $430,000 in favour of a grower in South America, so the gross margin is $500,000 - $430,000 = $70,000, which is 14% of the sale value.
The trader's bank charges an issuance fee of 0.5% on the $430,000 back-to-back credit, which is $2,150, plus a handling and advising fee of 0.25% on the $500,000 master credit, which is $1,250. Total bank charges are $2,150 + $1,250 = $3,400, so the net margin is $70,000 - $3,400 = $66,600, or 13.32% of the $500,000 sale value.Case study
Seen in the real world.
Meridian Sourcing Partners is a fictional trading company invented to illustrate this concept. It had built a business matching Scandinavian furniture retailers with workshops in Vietnam, but its own balance sheet held only $180,000 of usable cash, far too little to prepay for the $1,100,000 order it had just won.
Its bank agreed to a back-to-back structure: the retailer's master credit for $1,100,000 was assigned as security, and the bank issued a credit for $940,000 in favour of the Vietnamese workshop. The terms were matched line by line, except that the supplier credit expired eighteen days earlier and required a slightly earlier latest shipment date.
The first shipment nearly failed when the workshop presented a packing list describing the goods differently from the master credit. Meridian's documentary clerk caught the wording before presentation, had it corrected, and the trade closed with a net margin of about $150,000 after bank charges. The illustrative lesson is that in this structure the paperwork discipline, not the trading idea, is what protects the margin.
Watch out
Common mistakes.
- Assuming the second credit only has to be paid if the end buyer pays. The two credits stand alone, and the supplier gets paid on compliant documents regardless of what happens upstream.
- Letting the goods description differ between the two credits. Any wording gap makes it impossible to present the supplier's documents under the master credit, which is how traders end up paying a supplier without being reimbursed.
- Setting the same expiry date on both credits. The trader needs a window to substitute its own invoice and draft, so the back-to-back credit must expire first.
Questions
People also ask.
Is a back-to-back credit the same as a transferable credit?
No, a transferable credit is one instrument split among suppliers, while a back-to-back arrangement creates a genuinely separate second credit with its own issuing bank obligation.
Why do banks charge more for this structure?
Because the issuing bank on the second credit takes real risk if documents do not match, so it prices in both the extra work and the possibility of being left unpaid.
Does the end buyer know who the real supplier is?
Usually not, since keeping the supply source confidential is one of the main reasons traders choose this structure over a transferable credit.
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