Key Terms Used in This Guide:
ASA (Advanced Subscription Agreement) → A way to invest in startups, similar to a SAFE, where investors provide capital in exchange for future shares.
Qualifying Financing Event → A funding round where ASAs or CLNs automatically convert into shares, typically at a predetermined valuation or discount.
Longstop Date → The latest possible date when an ASA must convert, usually after 6-12 months.
FounderCatalyst also supports CLNs (Convertible Loan Notes) and SAFEs (Simple Agreements for Future Equity), although they are less commonly used than ASAs in the UK.
CLNs can be useful when you want to include interest or loan repayment terms.
SAFEs are simpler and don’t involve debt, but are less familiar to UK-based investors and legal professionals.
Important note: CLNs and SAFEs are not eligible for SEIS or EIS tax relief. If SEIS/EIS is important to your investors, ASAs are the appropriate instrument to use.
The process for CLNs and SAFEs on FounderCatalyst is very similar to ASAs. If you're considering these instruments or unsure which one best suits your needs, we recommend booking a call with the FounderCatalyst team to discuss your options.
Before adding any ASAs to your cap table — or asking the FounderCatalyst team to do this for you — please ensure the figures and details are accurate. Once a funding round is closed, it becomes very difficult to make changes.
If you are requesting support to enter ASAs on your behalf, you must provide the following complete and accurate information for each ASA investor:
Full name
Email address
Number of shares
Price per share
Discount %
SEIS/EIS scheme classification (e.g. None, SEIS, or EIS)
Important: Incorrect, incomplete, or estimated figures can cause cap table errors and jeopardise SEIS/EIS eligibility. Please double-check all figures before finalising your round.
Below are situations you might encounter when managing ASAs on FounderCatalyst. Click on the relevant scenario for step-by-step guidance.
Scenario 1: You already have a live ASA and are now onboarding to the platform.
Scenario 2: You are onboarded to the platform but haven’t started a funding round—now issuing an ASA.
Scenario 3: You are starting an initial funding round but want to issue an ASA before closing it.
Scenario 4: You have closed a funding round on FounderCatalyst and now need to issue an ASA.
Converting ASAs: Qualifying Financing Event or Longstop Date
Go to Cap Table
Add a Shareholder → Click “A person that owns shares in your company.”
Select ASA → Choose “Advance Subscription Agreement” as the share type.
Input Expected Shares → Enter either:
Go to Cap Table
Add a Shareholder → Click “A person that owns shares in your company.”
Select ASA → Choose “Advance Subscription Agreement” as the share type.
Input Expected Shares → Enter either:
Important: If you're planning a priced round followed by an agile round, this may be a better strategy. Book a call with FounderCatalyst to discuss your options.
Go to Cap Table
Add ASA as ‘Ordinary Shares’ → You must initially enter ASA shares as ordinary shares (they will be adjusted later).
Enter Share Details → Add:
Important Notes:
Once a funding round is closed, the cap table becomes locked. You cannot make direct edits to the pre-funding round cap table.
The only action you can take at this stage is to issue share certificates.
If you expect to issue ASAs post-round, consider an agile round instead. Book a call with FounderCatalyst to discuss options.
Raise a Support Ticket → Notify FounderCatalyst that an ASA needs conversion.
Follow Post-Round Formalities → Complete all closed round steps:
Update Companies House → Submit SH01 to record newly issued shares.
Complete (S)EIS1 Forms → If relevant, file with HMRC.
ASAs can have a significant impact on SEIS/EIS eligibility, so careful planning is required.
Key Risk: If an EIS ASA converts before all SEIS funds have been used, then none of your SEIS investors will be able to claim SEIS—they’ll have to switch to EIS.
Best Practice:
See our article for more details: For (S)EIS investors, are ASAs the Devil’s work?
You can start a funding round in minutes with a free FounderCatalyst account, experiment with our service and see how easy it would be to save time, money, and emotional resources by using FounderCatalyst when raising your next funding round.
You can see a sample of the paperwork we'd generate, invite colleagues to act as investors, and truly experiment with how easy we make it. Then cancel the experiment round when you're ready to start a real one!
Ask away...