A founder you backed two years ago calls to say a fund is leading their Series A - and there's room on the cap table for you to follow your money in. That's co-investing: you write a cheque into the same round a venture capital firm is leading, usually buying the same shares at the same price the fund paid. The fund sets the terms. You decide whether to take them.
It's one of the most common ways UK angels get into stronger rounds than they could source or price alone. It's also one of the most misunderstood, because "we invested together" can mean two very different things depending on what's written into the paperwork.
How does co-investing with a VC actually work?
In a typical VC-led round, the fund is the lead. It negotiates the valuation, drafts or approves the term sheet, and runs the diligence that sets the price. Once those terms are agreed, there's often a slice of the round left over - sometimes by design, sometimes because the lead doesn't want to own the whole thing. That slice is where angels come in.
As a co-investor you're generally buying into the same round on the lead's headline economics: the same share class, the same price per share, the same closing date. You didn't set the valuation - the fund did - so the work shifts from pricing the deal to deciding whether you trust the price someone else set. That's a different muscle from leading a seed round yourself, and worth being honest with yourself about.
You're not pricing the deal. You're deciding whether to trust the price someone else set.
There are two broad shapes this takes. You might invest directly onto the cap table as a named shareholder. Or you might come in through a vehicle - a syndicate special purpose vehicle (SPV) or a nominee structure that pools several angels into a single line on the register. The economics can be similar; the rights, the fees, and the tax treatment are not. More on that below.
Do angels get the same terms as the VC?
On the economics, often yes. On the rights, usually no - and this is the gap that trips people up.
A lead fund negotiates for control and information: a board seat or board observer rights, detailed monthly or quarterly reporting, consent rights over big decisions (raising more money, selling the company, changing the share structure), and protective provisions written into the shareholders' agreement. A small co-investing angel typically gets the same price and the same share class, but few or none of those governance rights. You're a passenger on terms the lead drove.
That isn't necessarily a problem - plenty of angels are happy to ride alongside a credible lead. But you only know what you're holding if you read the documents. The two that matter most are the term sheet (the summary of the deal) and the shareholders' agreement (the binding detail). Look in particular for:
- Share class and liquidation preference. Is your money buying the same preference shares as the fund, or ordinary shares that sit behind them if the company sells? A 1x preference ahead of you changes what you'd actually receive in a modest exit.
- Pro-rata rights. The right to invest again in future rounds to defend your percentage. VC-backed companies raise repeatedly, so without it your early stake dilutes each time. (See our piece on pro-rata rights and follow-on investing.)
- Information rights. Whether you're entitled to regular accounts and updates, or left to chase the founder for a sense of how things are going.
- Drag-along and tag-along. Whether a majority can force you to sell - and whether you can force your way into a sale the big holders negotiate.
Can you still get SEIS or EIS relief alongside a VC?
Often, yes - but it depends on how your tranche is structured, not on whether a fund is in the round. The SEIS and EIS reliefs attach to the shares you buy and the company you buy them in. A venture fund sitting on the same cap table doesn't, by itself, disqualify your portion.
The friction is the share class. SEIS and EIS only apply to ordinary shares carrying no preferential rights to dividends or assets. Many funds invest through preference shares to secure a liquidation preference - and those don't qualify for the reliefs. So a co-investing angel who wants relief usually needs their slice issued as qualifying ordinary shares, separate from the fund's preferred. Plenty of UK rounds are deliberately structured to allow exactly this. It's a question to ask the company before you commit, not to assume.
As a reminder of what's on the table when the shares do qualify: SEIS gives 50% income tax relief on up to £200,000 invested per tax year, with a minimum three-year hold; EIS gives 30% income tax relief on up to £1,000,000 per tax year (or £2,000,000 if at least £1,000,000 goes to knowledge-intensive companies), also held for at least three years. Both can be carried back to the previous tax year, both offer loss relief if the company fails, and gains on the shares can be exempt from capital gains tax if held for three years with relief claimed. The company has to hold valid HMRC advance assurance and issue you an SEIS3 or EIS3 certificate before you can claim.
One thing a VC-led round can quietly affect is the company's own eligibility. SEIS is for very early companies - trading under three years, fewer than 25 full-time-equivalent staff, gross assets under £350,000, and a £250,000 lifetime SEIS cap. A company that's grown enough to attract a venture round may have aged out of SEIS and into EIS territory, or out of the schemes altogether. On the EIS side, the company-level limits were updated by HMRC on 6 April 2026 - broadly, gross assets up to £30 million before the share issue, a £10 million annual cap and a £24 million lifetime funding cap across the venture capital schemes, fewer than 250 full-time-equivalent employees, and within seven years of first commercial sale, with higher allowances for knowledge-intensive companies. Because those figures move, check the current numbers on the gov.uk EIS guidance and the SEIS guidance rather than relying on a figure you read once.
This is general information, not financial or investment advice. Tax treatment depends on your circumstances and the rules can change. Speak to an FCA-regulated adviser before investing.
How do angels find VC-led rounds to co-invest in?
Almost always through people, rarely through a listing. A competitive round led by a name fund is not advertised; it's filled from a rolodex. The realistic routes in are:
- Founders you already backed. The cleanest access. If you wrote an early cheque and were useful, founders will often make room for you to follow on when a fund leads the next round.
- Syndicate leads. A lead angel or syndicate with an allocation in the round can carve you a piece, usually for a share of any upside (the "carry").
- The funds themselves. Some VCs and angel networks run formal co-investment programmes, inviting trusted angels into rounds they lead - partly to fill the round, partly because useful angels bring help the fund can't.
- Being worth having back. The angels who get the call are the ones a fund or founder actively wants on the cap table again. Reputation is the dealflow.
For the wider picture on sourcing, see where angels actually find dealflow and our guide to finding angel deals in the UK.
Is a VC in the round a reason to relax?
It's tempting to treat a fund's involvement as diligence done for you. Resist that. A credible lead investing real money after its own analysis is genuine information - it would be silly to pretend otherwise. But it's a signal, not a safety net, and the gap between the two is where co-investors get hurt.
Funds are wrong regularly; their entire model assumes most investments fail and a few pay for everything. Their incentives aren't yours, either - a fund spreading risk across thirty companies can shrug off a write-off that would sting an angel with six positions. And the fund's preference shares may mean it gets paid back first in a soft exit while your ordinary shares get little. Co-investing can put you in better rooms. It doesn't change the basic arithmetic that early-stage investing carries a high risk of losing the whole cheque.
Used well, co-investment is a way to access stronger companies, share the diligence load, and keep your own judgement switched on rather than outsourced. The angels who do it best treat the lead's conviction as one input among several - and still read every line of the agreement they're signing.