International Expansion: The First Three Countries, in Order

Why most founders get this wrong

The default UK→US instinct is unreflectively held by most UK SaaS founders, often for reasons that do not survive scrutiny. The market size is real but is also accessible from the UK without a US office for many vertical and mid-market plays; the language is shared but US enterprise buying patterns differ materially from UK ones; the deal-size lift is real but only for specific ICPs and is offset by US sales-cycle length and market-rate compensation.

The second error is conflating "expansion" with "office". Selling into the US from a UK base is a different operating-model decision from opening a US office; the first is reversible, the second is not. Many scaleups should sell into the US for 12 to 18 months before deciding whether to open a US office, not the reverse. The default sequence is the opposite of what most founders execute.

The third error is treating the second and third country as a sequel rather than a portfolio decision. Once the second country is chosen, the third country becomes constrained by the operating-model investments made in the second. A scaleup that opens a US office and then realises DACH would have been a better second country has to reverse two years of decisions to course-correct. The decision has to be made portfolio-first.

The jurisdiction reality for UK scaleups

The UK→US default is rooted in the venture-capital narrative that most successful UK SaaS scaleups had US presence by Series B. The historical pattern is real but is partly an artefact of selection — the scaleups that survived to be visible were disproportionately US-friendly. The selection bias is significant; the underlying causal claim that US-first is right for most UK SaaS is weaker than commonly assumed.

For specific industries, UK→Ireland has emerged as a strong default for compliance-driven SaaS post-2020, particularly under EU data residency requirements; UK→DACH (Germany, Austria, Switzerland) has emerged for vertical SaaS where regulatory alignment with European standards matters; UK→Nordics has emerged for B2B fintech with proximity to advanced digital banking infrastructure. None of these are alternatives to eventual US presence — they are better second countries that produce better operating-model evidence at Series B than a thinly-staffed US office.

Note: The jurisdictional differences matter for accounting and tax: a US subsidiary triggers US GAAP reporting obligations, US payroll, and state-level sales-tax complexity that a DACH subsidiary does not (which has its own VAT and German GAAP/HGB obligations). The operating-model implications of jurisdiction choice extend well beyond market access — they shape the finance function for years.

How to apply it to your round

Series B partners reading international-expansion narratives are looking for evidence of structured decision-making, not for evidence of US presence. A founder who can defend the choice of second country with the three-step decision tree and the economic comparison presents an institutional-grade operating-model case. A founder who chose US-first because "everyone goes to the US" presents a generic narrative that does not hold up in diligence.

Cross-link reading: international expansion as a Series B narrative for the partner-facing storytelling dimension; partnerships as a growth vector for the channel-availability dimension that interlocks with the country choice.

The third-country decision

The third country is constrained by the second. Companies that opened the US as their second country typically have a "next big country" decision that defaults to either DACH or Australia; companies that opened DACH typically have a "next big country" decision that defaults to either US or Nordics. The defaults are not necessarily right; they are the path-dependent consequence of the second-country choice. The portfolio framing applies: the third country should be evaluated against ICP regulatory environment, deal-size lift, and channel availability for the new market, not by reference to which country is "next" in the founder's mental sequence.

The most common third-country error is opening a fourth jurisdiction before the second is at scale. A scaleup with a UK base, a US office at £3M ARR, and a DACH office at £500k ARR has spread its operating-model investment too thin and will struggle to defend any of the three at a Series B IC memo. The discipline is to bring the second country to material scale (typically £5M+ ARR or 25 percent of total ARR) before opening a third.

The accounting and tax operating-model implications

Each new jurisdiction adds operating-model overhead beyond market access. A US subsidiary triggers state-by-state sales-tax registration (the post-Wayfair landscape requires registration in any state where economic nexus is established), US payroll administration, US GAAP reporting alongside UK GAAP/IFRS for consolidation, and exposure to state income taxes for any state where physical presence is established. A DACH subsidiary triggers VAT registration, German HGB reporting alongside IFRS, social-charge compliance, and works-council obligations once headcount exceeds defined thresholds. An Irish subsidiary is the lowest-overhead EU-resident option but still adds Irish corporate-tax compliance and statutory reporting. The finance function shape changes materially with each jurisdiction; founders who underestimate this overhead spend the next twelve months building finance infrastructure rather than building product.