What it means
In the classic version, a US parent lends dollars to the local subsidiary of a British group while the British parent lends the equivalent sum in sterling to the US group's UK subsidiary. Each loan runs for the same term at a locally appropriate interest rate, and at maturity each borrower repays in the same currency it borrowed.
The appeal is that neither business carries currency risk on the principal, because each one borrows and repays in the currency its local operations actually earn. It can also sidestep local rules or banking frictions that make it slow and expensive for a foreign parent to push money into a subsidiary directly.
The bank-intermediated version is far more common today. A parent deposits cash with a bank in its home country, and that bank's overseas branch lends the subsidiary an equivalent sum secured by the deposit, so the local lender takes almost no credit risk and prices the loan cheaply.
The main weakness is counterparty risk. If one side defaults, the other is still contractually bound on its own leg unless the documentation contains an explicit right of set-off, so well-drafted agreements state that default on one loan cancels and nets off the other.
Currency swaps have largely replaced true back-to-back loans because they are quicker to document and do not gross up the balance sheet. The older structure survives where swap markets are thin, where capital controls bite, or where a group specifically wants an on-balance-sheet loan rather than a derivative.
In practice
Real-world examples.
Example
A Canadian mining group needs Australian dollars for a new site but does not want to take on currency exposure. It arranges a back-to-back loan with an Australian industrial company that needs Canadian dollars, each lending its home currency to the other's local subsidiary for five years.
Example
A European software company's subsidiary in a country with strict capital controls cannot receive a direct intercompany loan. The parent instead deposits $3,000,000 with a global bank, which lends the local equivalent to the subsidiary through its branch in that country.
Example
A family-owned manufacturer wants to fund a US warehouse without repatriating profits held offshore. It pledges an offshore deposit to secure a US bank loan for the American entity, and the interest earned on the deposit offsets most of the loan coupon.
Formula
Calculation
Net interest cost = interest paid on the local borrowing - interest earned on the matching deposit
A US group needs $5,000,000 of funding for its subsidiary in a market where local banks would charge 9% to an unrated foreign-owned borrower. Instead the parent places a $5,000,000 deposit with its relationship bank at 3%, and the bank's local branch lends the subsidiary $5,000,000 at 5.5% against that deposit.
Interest paid on the loan is $5,000,000 x 5.5% = $275,000 a year. Interest earned on the deposit is $5,000,000 x 3% = $150,000, so the net cost to the group is $275,000 - $150,000 = $125,000, an effective rate of 2.5%.
Borrowing locally without the structure would have cost $5,000,000 x 9% = $450,000. The back-to-back arrangement therefore saves $450,000 - $125,000 = $325,000 a year before documentation and legal fees.Case study
Seen in the real world.
Northvale Instruments is an invented company used here as an illustrative example. Its subsidiary in a fast-growing but tightly regulated market needed $4,000,000 to fit out a service centre, and local banks quoted 11% because they viewed a young foreign-owned entity as a weak credit.
Rather than sell dollars for local currency and take the exchange risk, Northvale placed a $4,000,000 deposit with its main bank at 2.5% and had that bank's local branch lend the subsidiary the equivalent amount at 4.75% against the deposit. The net cost was $190,000 minus $100,000, or $90,000 a year, against $440,000 for the direct local loan.
The finance team insisted on one clause above all others: if either leg defaulted, the deposit and the loan would be netted immediately. Two years later, when a change in local reporting rules forced the group to restructure, that netting clause let it unwind the whole arrangement in a fortnight. The illustrative point is that in back-to-back lending the set-off wording matters as much as the interest rate.
Watch out
Common mistakes.
- Treating the two loans as one net position for accounting purposes. Unless the offset criteria are genuinely met, both the asset and the liability sit on the balance sheet at full value, which inflates gearing ratios.
- Forgetting the interest rate mismatch. Each leg is priced in its own market, so a favourable-looking headline rate on one side can be wiped out by the rate the other side has to accept.
- Assuming currency risk disappears entirely. The principal is matched, but interest payments, fees and any unmatched timing differences still create exposure.
Questions
People also ask.
Is a back-to-back loan the same as a currency swap?
Not quite, since a swap is a single derivative contract with exchange of payments, while a back-to-back loan is two real loans that each sit on a balance sheet.
Do tax authorities scrutinise these arrangements?
Yes, because the structure can be used to shift interest deductions between jurisdictions, so transfer pricing documentation showing a commercial purpose is essential.
Can two unrelated companies use this structure?
They can, and historically that was the norm, but the credit risk of an unrelated counterparty is why most modern versions run through a bank instead.
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