Raising from US Investors: What UK SaaS Founders Need to Know

Why UK SaaS Founders Look to US Investors

The maths is straightforward. US venture capital funds deployed roughly $170 billion in 2025 compared to approximately $20 billion across all of Europe. The US has more funds, larger cheques, and a deeper bench of SaaS-specialist investors who understand recurring revenue business models. For UK SaaS companies that have outgrown the UK investor pool or need a partner with US market expertise, raising from American VCs is a logical next step.

But raising from US investors is not simply a matter of sending your deck across the Atlantic. US VCs have different structural requirements, different valuation frameworks, different expectations for data rooms, and a different pace of decision-making. This guide covers what changes and how to prepare.

The Delaware C-Corp Question

The most immediate structural barrier is entity type. Most US VCs strongly prefer — and many require — investing into a Delaware C-Corporation. There are practical reasons for this: Delaware corporate law is the most developed and investor-friendly in the US, the legal precedents are well-established, and the exit mechanics through US markets are straightforward.

If you are a UK limited company and want to raise from US investors, you have three options. First, do a Delaware flip before fundraising, making the US entity the parent. This is the cleanest approach and removes the structural objection entirely. Second, ask US investors to invest into your UK entity. Some will, particularly those with European experience like Accel, Index Ventures, or Balderton. But many US-only funds will not. Third, create a holding structure where US investors invest into a new US parent while existing UK investors remain in the UK subsidiary. This can work but adds complexity.

The right choice depends on the investors you are targeting. If you have already identified specific US funds and they have confirmed they will invest in a UK entity, you may not need to flip. If you are approaching the broad US market, a Delaware C-Corp removes friction and widens your addressable investor pool significantly.

Valuation Differences: US vs UK

US SaaS valuations are generally higher than UK equivalents at every stage. A UK SaaS company at £2M ARR growing 100 percent might raise a Series A at 15x to 20x ARR from UK investors. The same company pitching US investors — with a Delaware C-Corp and US traction — might achieve 20x to 30x ARR.

The premium reflects several factors. US investors have access to more capital, which pushes valuations higher through competition. The US market is five to seven times larger than the UK, meaning US investors price in a larger addressable market. And US exit multiples are historically higher, supporting higher entry valuations.

However, the premium comes with expectations. US investors at Series A typically want to see a clear path to the US market. They will ask about your US go-to-market strategy, US unit economics, and whether you have any US customers or pipeline. A UK company raising from US investors purely on UK metrics will receive UK valuations — the premium is for the US opportunity, not the UK business alone.

Build your financial model to show both the UK base business and the US expansion separately. US investors want to see the US opportunity modelled explicitly, not buried in a blended global forecast.

What US Investors Expect in a Data Room

US investor due diligence is typically more structured and documentation-heavy than UK fundraising, particularly at Series A and beyond. Your data room needs to meet US standards.

Financial documentation: Monthly P&L for at least 18 months with clear ARR, MRR, and unit economics. A three-to-five year financial model with base, bull, and bear scenarios. Audited or reviewed financial statements if available. Cap table in US format showing fully diluted ownership including option pools and convertible instruments.

SaaS metrics: US investors expect granular metrics calculated consistently. MRR bridge showing new, expansion, contraction, and churn by month. Cohort retention analysis by monthly or quarterly cohort. LTV:CAC ratio, CAC payback, and burn multiple tracked over time. Pipeline coverage and win rates by segment.

Legal documentation: If you have done a Delaware flip, all flip documentation including the share exchange agreement, board resolutions, and tax opinions. All customer contracts, particularly those with US customers. IP assignment agreements confirming the company owns all intellectual property. Employment agreements for all key employees.

Tax and compliance: UK corporation tax returns and R&D tax credit claims. Transfer pricing documentation if you have intercompany transactions. Any outstanding tax disputes or HMRC enquiries.

SAFEs vs Convertible Notes vs Priced Rounds

US fundraising uses different instruments than UK rounds, particularly at Seed and pre-Series A stages.

SAFEs (Simple Agreement for Future Equity): The dominant instrument for US Seed rounds. Created by Y Combinator, SAFEs convert to equity at the next priced round at a valuation cap or discount. They are simpler than convertible notes — no interest, no maturity date, no debt on the balance sheet. UK founders raising from US angels and pre-seed funds will almost always encounter SAFEs.

Convertible notes: Still used but less common than SAFEs in the US. Similar conversion mechanics but structured as debt with interest and a maturity date. More common in the UK where the SEIS and EIS schemes interact with equity instruments.

Priced rounds: Standard for Series A and beyond in both the US and UK. The key difference is that US priced rounds use US-style term sheets with provisions like participating preferred, anti-dilution (typically broad-based weighted average), and information rights that may differ from UK standard terms.

Have a US corporate lawyer review any term sheet from a US investor. The terms that are standard in the US market may differ materially from what you have seen in UK fundraising.

Board Composition Expectations

US investors often have specific expectations about board composition that differ from UK norms. A typical post-Series A board in the US has five seats: two for founders, two for investors, and one independent. US lead investors almost always take a board seat, and some take board observer seats as well.

US board governance tends to be more structured than UK equivalents at the same stage. Expect formal quarterly board meetings with detailed board packs, written board consents for major decisions, D&O insurance requirements, and clearly defined investor protective provisions covering things like future fundraising, acquisitions, and key hires.

The Fundraising Timeline

US fundraising takes longer than many UK founders expect. A realistic timeline from first meeting to money in the bank is four to six months, compared to two to four months for a typical UK round.

The extended timeline reflects the need to build relationships — US VCs typically want multiple meetings over several weeks before making a decision. Partner meetings at US funds are structured decision-making processes, not rubber stamps. Due diligence is more thorough and documentation-heavy. And the legal process for US-structured rounds takes longer, particularly if a Delaware flip is required as part of the closing.

Plan your runway accordingly. If you have 15 months of runway and plan a US fundraise, start now — not in six months.

Building US Investor Relationships

Warm introductions remain the most effective way to reach US VCs. The best sources of introductions are existing UK investors who have co-invested with US funds, UK founders who have successfully raised from US investors, accelerator networks like Y Combinator, Techstars, or Seedcamp alumni networks, and SaaS conferences where US investors attend such as SaaStr Annual and SaaS North.

Do not cold email US VCs with a pitch deck. The conversion rate is near zero. Instead, invest time in building relationships six to twelve months before you plan to raise. Publish thought leadership, build a US customer base, and create warm connections through your network.

How a Fractional CFO Prepares You for US Fundraising

Raising from US investors requires investor-grade financial preparation that meets US standards. A fractional CFO builds the financial model, prepares the data room, calculates metrics consistently, and manages the financial workstream of the raise so you can focus on building investor relationships.

At Scale With CFO, we have helped UK SaaS companies prepare for and execute fundraises with both UK and US investors. Book a free discovery call to discuss your fundraising plans.