A UK subsidiary of a US parent cannot raise SEIS or EIS money. This catches a specific and growing group of founders: UK teams who flipped to a Delaware holding company for an American accelerator or investor, and who now want to raise from UK angels.
The condition is short and there is no way round it. A qualifying company must not be under the control of another company. A UK subsidiary sitting beneath a Delaware topco is controlled by another company, and that is the end of the analysis regardless of where the team sits, where the work is done or how the group is managed.
What the rules actually require
A UK permanent establishment
A fixed place of business in the UK, or an agent here with authority to conclude contracts. Note what this does not say. UK incorporation is not required, which surprises people who assume the schemes are limited to UK companies.
Not controlled by another company
Assessed on the usual basis: a majority shareholding, or the ability to secure that the company's affairs are conducted in accordance with the parent's wishes.
Subsidiaries must be qualifying subsidiaries
The issuing company can have subsidiaries, provided it holds more than 50 per cent and no arrangement exists for someone else to control them.
Which structures work and which do not
Qualifies
A UK topco with a US operating subsidiary can raise under both schemes, provided the group meets the gross asset and employee tests, which are applied across the group.
Can qualify, with care
The permanent establishment must be real rather than a registered address, and it needs to be evidenced.
Does not qualify
This is the Delaware flip position, and no amount of UK substance changes it.
Nothing to invest in
The branch is not a separate company and cannot issue shares.
The flip nobody stress tested
A UK team joins a US accelerator, which requires a Delaware topco. The flip happens quickly, often under time pressure, and usually without anyone asking what it does to UK tax reliefs.
Eighteen months later the company wants to raise from UK angels, who ask for advance assurance, and the answer is that none is available. By that point the position is considerably harder to fix. Unwinding a flip is not a filing, it is a transaction.
Options if you are already flipped
- Flip back. Done reasonably often, but it is a share for share exchange with UK and US consequences on both sides. It also resets nothing: the SEIS trading clock has kept running, and if the trade started more than three years ago SEIS has gone regardless.
- Raise under EIS after restructuring. EIS has a seven year window from first commercial sale rather than three, so it survives longer. The limits also rose from April 2026 to £10 million a year and £24 million over the company's lifetime, with £20 million and £40 million for knowledge intensive companies.
- Raise from investors who do not need the relief. US investors, institutions and corporates are not claiming UK income tax relief. Often the pragmatic answer for a company raising in the US anyway.
- Accept the position. If the company is genuinely US facing, the absence of SEIS may not matter. The mistake is discovering it during a UK round rather than deciding it in advance.
If you have not flipped yet
Ask what the flip is actually for. If it is a specific accelerator requirement or a named investor's condition, that is a real reason. If it is a general sense that US structures are better for raising money, weigh it against losing SEIS and EIS, which for a UK team raising from UK angels is a significant loss of leverage.
Consider timing. Raising a SEIS or EIS round first and flipping later is often possible, though it needs care: a share for share exchange can be a disqualifying event for investors who have already claimed, and their relief can be clawed back. There is a clearance procedure and it should be used rather than assumed.
Consider whether a UK topco with a US subsidiary achieves what you actually need. For many companies it does, and it keeps both schemes available.
Get advice before the flip, not after
- You are considering a Delaware flip for an accelerator or investor
- You have already flipped and want to raise from UK angels
- You are unsure whether your group structure breaks the control test
- You want to raise under SEIS or EIS and flip afterwards
The decision is cheap to think about in advance and expensive to reverse, and the people advising on the flip itself are frequently not the people thinking about UK venture capital reliefs.
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This article sets out the general position and is not advice on any particular set of facts, and does not address non UK tax consequences. Thresholds and rates are those applying at the date of publication.