by Undo Capital
December 15, 2025

What Is SAFE (UK Variant; Differences vs ASA)?

A UK SAFE is a simple agreement for future equity that allows investors to provide capital upfront in exchange for shares issued in a later funding round.

SAFE (UK Variant; Differences vs ASA) Meaning

The SAFE (UK variant) meaning centres on a streamlined, flexible investment instrument adapted from the US Y Combinator SAFE. To define the UK SAFE in practice, it converts into shares during a future qualifying funding round, often at a discount or valuation cap, without accruing interest or acting as debt. Unlike an ASA, a SAFE typically has no long-stop date, no repayment obligation and fewer HMRC complexities, but this also makes it harder to obtain SEIS/EIS relief. A clear SAFE definition highlights its simplicity for fast rounds while noting that ASAs remain the preferred SEIS/EIS-compliant option in the UK.

Disclosure Notice: This communication is issued by Undo Capital Limited (“Undo Capital”) and is provided strictly for informational purposes only. It contains general information and should not be relied upon as accounting, business, financial, investment, legal, tax, or other professional advice. Undo Capital is not regulated by the Financial Conduct Authority (FCA) and does not provide investment, financial, or tax advice. Our services are designed to assist startups and businesses with company formation, legal agreements, and funding-related documentation. Nothing in this communication constitutes, or should be construed as, a recommendation, offer, or solicitation to purchase or sell any security or financial instrument.

Participation in startups and early-stage enterprises involves significant risk. Such investments may be illiquid, may not generate dividends, may be subject to dilution, and may result in the total loss of invested capital. Any decisions or actions that may affect your business or personal interests should be taken only after seeking advice from suitably qualified professional advisors, and should form part of a balanced and diversified portfolio. This communication may contain links to third-party websites. The inclusion of such links does not imply endorsement, approval, investigation, or verification by Undo Capital. We accept no responsibility or liability for the content, accuracy, or use of information contained on any third-party websites. © 2025 Undo Capital Limited. All rights reserved. Reproduction is strictly prohibited.