This chapter looks at cloud cost from a European seat: which currency the invoice and the report are in, how VAT appears on cloud invoices, which of a provider's companies issues the invoice, and what data residency and European regulation change about the cost. It describes mechanisms and what the providers document. Every legal, tax and accounting judgement belongs to your tax adviser, auditor or legal adviser.

What this chapter covers

The money section starts at the invoice. Which currency do the providers bill in, and how does that become a report in euro or pounds that stays comparable month after month? How does an invoice show VAT or the reverse charge, and where does tax sit in the billing data? Which of a provider's European companies issues the invoice, and why do tax, currency and contract terms depend on it? Why does the same service cost a different amount in two European regions, and how far can a comparison stretch before it stops being accurate? And what changes for companies in the United Kingdom that report in pounds and follow their own tax rules?

The sovereignty section starts at where the data lives and who controls it. What does it cost to keep data and processing in a particular region, and which data transfers does that create? What do AWS, Microsoft and Google offer under the sovereignty label, and what do separate price lists, accounts and invoices mean for cost? How does the Data Act change the charges providers may make when a customer switches? What cost follows from the resilience and evidence requirements of DORA and NIS2? What does the GDPR mean for cost data that carries names, email addresses or tags? And what part do the providers' emissions data play in reporting under the CSRD? How to plan switching costs today is the subject of EU Data Act: plan cloud switching costs before 2027.

Both sections explain how the providers bill and what their documentation and the official EU and UK government pages say about the mechanism. Whether a rule applies to your company, which tax is due, or whether an offering meets a requirement is a judgement your tax adviser, auditor or legal adviser makes. Every page follows the same pattern: how the mechanism works, what it means for cost, and where teams get it wrong.

Key terms

  • European sovereign cloud: the providers' offerings that confine data and operations to Europe, often with their own price list and accounts.
  • Effective cost: the cost basis after discounts and commitments, on which regions and offerings can be compared fairly.
  • Cost report: the report that states which currency it uses and whether it includes tax.
  • Data transfer: the cost that arises when data moves between regions, environments or providers.
  • Budget: the limit that needs an exchange-rate policy once the invoice and the budget are in different currencies.

Neighbouring chapters

Chapter 2, "How cloud billing works", shows the invoice and its lines; this chapter explains its tax lines and the company that issues it. Chapter 3, "Billing data and standards", describes the exports whose tax and currency columns this chapter reads. Chapter 5, "What cloud services cost", describes the per-service prices on which any comparison of regions and sovereign offerings rests. Chapter 8, "Budgets, forecasts and finance", sets the budgets that need an exchange-rate policy when the invoice and the budget are in different currencies. Chapter 13, "Tooling", follows this one and describes the tools that analyse cost data. Every chapter is listed in the handbook.