Last updated: 31 October 2026
A SAFE is not debt and has no interest or maturity date; it converts into shares at a later equity financing. A priced round sets a share price and issues shares now, fixing the valuation on the day.
What is a SAFE?
According to Y Combinator, a SAFE “is not a debt and not a loan – it has no interest and no maturity date.” When the company sells preferred stock in an equity financing, the outstanding SAFEs will convert into shares. Y Combinator adopted the post-money SAFE as its standard in 2018.
How does a SAFE convert (cap, discount, MFN)?
With a post-money SAFE, the valuation cap is the company valuation after the investment; ownership sold equals the investment amount divided by the valuation cap. If the round values the company above the cap, the SAFE investor converts at the cap instead. A discount gives a lower price than the next priced round; a Y Combinator example says a 20% discount means a price 20% below the round price. An MFN SAFE has no cap or discount; it takes the cap or discount of any SAFE issued later. Pro rata rights are optional and separate. As a worked example, a SAFE of $500,000 on a $5m post-money cap equals 10% of the company ($500,000 / $5,000,000).
What is a priced round?
A priced round sets a price per share and issues shares, usually preferred, on the day, which fixes the pre-money valuation then. This contrasts with SAFEs, which convert only at a later equity financing. As a worked example, $2m invested at $8m pre-money equals $10m post-money; the investor owns 20% ($2m / $10m).
What are the main differences between a SAFE and a priced round?
A SAFE has no interest, no maturity date, and converts at the next equity round. A priced round issues shares now, with the price agreed now. Convertible loan notes are debt: they typically have a maturity of 12–18 months and may carry interest, unlike a SAFE.
| Item | Figure |
|---|---|
| SAFE example: $500,000 on a $5m post-money cap | 10% of the company |
| Priced round example: $2m at $8m pre-money | 20% of the company |
| SEIS income tax relief | 50% up to £200,000 a year |
| EIS income tax relief | 30% up to £1m (£2m if at least £1m goes into knowledge-intensive companies) |
UK angle
Goodwin notes that, for investors seeking SEIS or EIS relief, a convertible loan note “will not be appropriate”. Whether a SAFE suits investors who want that relief is a question for a tax adviser. SEIS income tax relief is 50% up to £200,000 a year; EIS relief is 30% up to £1m, or £2m if at least £1m goes into knowledge-intensive companies. Readers should check HMRC guidance or take advice on tax matters.
Frequently asked questions
Is a SAFE debt?
No. According to Y Combinator, a SAFE is not debt and not a loan, and it has no interest and no maturity date. It converts into shares when the company sells preferred stock in an equity financing.
What happens if the round values the company above the cap?
If the round values the company above the cap, the SAFE investor converts at the cap instead. This means the cap, not the higher round valuation, sets the conversion price for that SAFE.
How is a priced round different from a SAFE?
A priced round sets a price per share and issues shares, usually preferred, on the day, fixing the pre-money valuation then. A SAFE does not issue shares immediately; it converts at a later equity financing.
Are convertible loan notes the same as SAFEs?
No. Convertible loan notes are debt and typically have a maturity of 12–18 months and may carry interest, unlike a SAFE. Goodwin also says a convertible loan note will not be appropriate for investors seeking SEIS or EIS relief.
Should I rely on this for tax planning?
No. Tax relief details can change and personal circumstances matter. Readers should check HMRC guidance or take advice before making decisions.
Sources
- Y Combinator: documents and post-money SAFE
- Goodwin: convertible loan notes in the UK
- GOV.UK: tax relief for investors (SEIS and EIS)
Figures and prices were checked on 31 October 2026; check the linked sources before relying on them. This article is general information, not tax, legal or investment advice.
