Invoicing a UK Client in GBP: A Peruvian Consultancy Case

A Peruvian consultancy that wins a contract with a client in London faces four decisions before issuing the first invoice: what currency to invoice in, which collection mechanism to use, what tax treatment applies to the income, and what to do with the GBP balance while it approaches the date to pay its own team. Most guides on exporting services answer only the tax question, so the company ends up choosing the collection mechanism blind.

In Soulbit Academy we present this case as an illustrative, composite example, not an existing client. The company, its name and its figures are fictitious, and they exist to show, with concrete numbers, how those four decisions connect in a professional services contract invoiced in pounds sterling.

The case: Cordillera Advisors, a Peruvian consultancy with an advisory contract in London (illustrative profile)

Cordillera Advisors S.A.C. is an illustrative consultancy based in Lima, with 25 people working in strategy and management, that wins a six-month continuous advisory contract with a retail chain headquartered in London, with no office or activity in Peru. The contract sets monthly fees of GBP 18,000, invoiced on the first day of each month with a net 30-day payment term.

The finance team needed to resolve four questions before the first invoice: what currency to invoice in, which collection mechanism to use, what tax charge applies, and what to do with that balance while the payroll date for the 25 consultants approaches. The invoice currency shapes the collection mechanism, and the collection mechanism shapes when the money is actually available.

Why does a consultancy need to resolve these four decisions together instead of one at a time?

Because the real margin of the contract does not show up in any single decision, but in the difference between the GBP 18,000 invoiced each month and what actually arrives in Peru, converted and available in time to pay that month's payroll.

Which currency to invoice a UK client in: pounds, dollars or soles

Invoicing a UK client in pounds sterling is the option that creates the least friction when the client budgets and approves payments in that currency, as UK corporate buyers commonly do. Invoicing in dollars, the more common practice among Latin American service exporters, forces the client to convert its own GBP-denominated budget before paying. Invoicing in Peruvian soles is not a realistic option: no corporate client in London accepts an invoice in a currency it cannot budget or reconcile.

Cordillera Advisors chose to invoice in pounds sterling for two reasons: it reduces approval friction on the client's side, and under Soulbit's V1 the company can hold a balance in pounds sterling without converting it immediately to soles, so invoicing in GBP does not force it to take on currency risk at the moment of collection, only when it decides to convert.

Should a Peruvian consultancy always keep the invoice currency its client uses?

Not as a fixed rule. The decision depends on whether the company has future costs in that same currency, or prefers to convert to soles immediately to remove currency risk. Invoicing in the client's currency only makes sense when the company can hold a balance in it without a forced automatic conversion, as with the multi-currency GBP balance under Soulbit's V1.

Why Cordillera Advisors' invoice is taxed at 0% IGV in Peru

Exporting consulting services from Peru is taxed at 0% IGV when four concurrent requirements are met under the Ley del IGV: the service is rendered for value, the provider is domiciled in Peru, the beneficiary is non-domiciled, and the beneficiary's use of the service takes place abroad. Consulting, advisory and technical assistance services are among those listed in Apéndice V of the Ley del IGV, which SUNAT administers.

For Cordillera Advisors, the London retail chain has no branch, subsidiary or economic tie in Peru and uses the advisory service exclusively in its UK operation, so the monthly invoice of GBP 18,000 is taxed at 0% IGV. Before issuing that first invoice, the firm registered in SUNAT's Registro de Exportadores de Servicios and keeps the signed master contract as the proof of export the Ley del IGV requires for each operation.

What the London client withholds, and Peru's free foreign exchange system

A UK company with no domicile or tax registration in Peru does not withhold any Peruvian tax on the payment it sends to a Peruvian supplier, because it does not act as a Peruvian withholding agent. In this case, the GBP 18,000 invoice arrives in full. That income still counts as taxable revenue under Cordillera Advisors' corporate income tax return, because nothing was withheld at the source.

Peru does not require prior authorization to hold or convert foreign currency: companies operate under a freely floating exchange system overseen by the Banco Central de Reserva del Perú, without the mandatory channeling obligations that apply in some neighboring Andean countries. That difference matters for a consultancy deciding whether to hold its GBP balance or convert it right away, because the decision is purely financial, not a regulatory requirement.

Does Cordillera Advisors need to register for VAT in the United Kingdom because its client is in London?

No. The general business-to-business place of supply rule in HMRC's VAT Notice 741A places the supply where the business customer belongs, in this case the United Kingdom. It is the London retail chain that must self-account for UK VAT under the reverse charge if it applies, not Cordillera Advisors. The Peruvian consultancy neither charges nor declares UK VAT on this invoice.

Comparing the cost: traditional wire transfer versus a GBP balance

The cost of a traditional wire transfer combines a fee visible when the payment is ordered and a currency margin that is almost never known in advance until the payment settles, as detailed in the full breakdown of what a SWIFT transfer really costs. The World Bank's Remittance Prices Worldwide monitor finds that banks are the most expensive channel for sending money abroad, averaging 14.99% on personal remittances of 200 dollars; that figure measures remittances, not business-to-business payments, and the percentage tends to be lower on larger B2B transfers.

For this illustrative case, as a reference and not a real quote, a combined cost of 3% between fee and currency margin is assumed on the traditional wire. On the GBP 18,000 monthly invoice, that 3% equals GBP 540, and with an illustrative reference rate of 4.85 soles per pound, which is not a real quote or a rate offered by any provider, the nominal invoice of 87,300 soles arrives net at approximately 84,738 soles.

Collection element	Traditional wire transfer in GBP	GBP balance settled through local rails
Total cost known before confirming	No: only known once the payment settles	Yes: the OTC quote is shown before confirming the conversion
Correspondent bank deductions in transit	Possible at each link in the chain, without prior notice	Not applicable: no correspondent banking chain
Timing of the conversion to soles	Automatic on arrival, with no choice of timing	Chosen by the company, when it needs the funds
Conversion fee	Embedded in the bank's currency margin	Depends on the commercial agreement; no published fee schedule exists today

Why doesn't the company know the exact cost of a wire transfer until the payment settles?

Because the currency margin is embedded in the exchange rate the bank applies, with no separate fee line, and correspondent bank deductions in transit are not announced beforehand either. The amount Cordillera Advisors invoices and the amount it finally receives can differ without the company knowing until the payment arrives.

Under Soulbit's V1, the GBP balance is credited without passing through a chain of correspondent banks, and the conversion to soles, when the company needs it, is quoted through an OTC request: the company sees the price before confirming. That conversion cost depends on each company's commercial agreement; there is no published fee schedule today that would support claiming it is cheaper than the traditional banking channel, only that the price is visible before confirming.

Six-month collection calendar: when does Cordillera Advisors have the cash for payroll

Cordillera Advisors' collection calendar repeats identically across the six months of the contract: it invoices on day 1, the client pays at 30 net days, and from there the collection mechanism decides how many more days pass before the money is available in Peru. Through a traditional wire transfer, payment typically takes an extra three to five business days to arrive after the client authorizes it, depending on how many correspondent banks sit in the chain. With a GBP balance credited directly, that extra stretch disappears and the money is available the same day the client pays, or the next business day.

Milestone in the collection cycle	Via traditional wire transfer	Via GBP balance and local rails
Monthly invoice issued to the London client	Day 1 of the cycle	Day 1 of the cycle
Payment authorized by the client (net 30 terms)	Day 30	Day 30
Cash available in Peru	Between day 33 and day 35, depending on correspondents	Day 30 or 31, credited as a GBP balance
Payroll for the 25 consultants paid on time	At risk if payroll falls before day 33	No such risk, with cash available from day 30

That difference in days matters because Cordillera Advisors pays its 25 consultants at the end of each month, using a methodology similar to the one applied to a Colombian consultancy in a Colombian SMB's payroll cost case. If the client's payment lands on day 30 and the traditional wire settles as late as day 35, the company needs another source of cash for those five days; with the GBP balance available from day 30, converting funds and running payroll can happen on schedule.

What Soulbit resolves in this case, and what it does not

Soulbit does not calculate Cordillera Advisors' 0% IGV export status or run its payroll: registering in SUNAT's Registro de Exportadores de Servicios, keeping the proof-of-export documentation and calculating payroll charges remain the company's own responsibility, together with its accountant and payroll software. Soulbit also does not publish a fee schedule for converting pounds to soles, so no number in this case can be presented as the real cost of operating with Soulbit.

What it does resolve, within its real V1, is the movement of money on both ends of the cycle: collecting the invoice from the London retail chain, with a balance held in pounds sterling in omnibus accounts held by third parties under institutional MPC custody, not in a bank account under Cordillera Advisors' own name, and converting to soles through an OTC quote requested when the company decides, followed by disbursing to the Peruvian bank accounts of the 25 consultants. Cordillera Advisors can also share a payment link with its client to collect internationally, or a collection QR code, instead of relying solely on a wire order.

What Soulbit does not offer Cordillera Advisors includes expense cards, yield on the GBP balance, a proprietary token, or a native mobile app available today. Soulbit's local bank rail, the fastest disbursement path, operates only in Colombia within V1, so payroll to Cordillera Advisors' Peruvian team relies on the general disbursement flow rather than a local Peruvian rail.