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Knowledge Base: Using ASA's on FounderCatalyst

Last updated
23rd July 2025

Key Terms Used in This Guide:

What about CLNs and SAFEs?

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.

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.

Accuracy Requirements for ASAs

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:

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.

Find the Right Process for Your ASA

Below are situations you might encounter when managing ASAs on FounderCatalyst. Click on the relevant scenario for step-by-step guidance.

Step-by-Step Guides

Scenario 1: Adding an Existing ASA to Your Cap Table

  1. Go to Cap Table TODO - Uploaded image description

  2. Add a Shareholder → Click “A person that owns shares in your company.” TODO - Uploaded image description

  3. Select ASA → Choose “Advance Subscription Agreement” as the share type. TODO - Uploaded image description

  4. Input Expected Shares → Enter either:

  1. Click ‘Allocate Pending Shares’ → Once all details are entered, click the green 'Allocate Pending Shares' button under the cap table to finalise the addition. TODO - Uploaded image description

TODO - Uploaded image description

Scenario 2: Issuing an ASA Before a Funding Round

  1. Go to Cap Table TODO - Uploaded image description

  2. Add a Shareholder → Click “A person that owns shares in your company.” TODO - Uploaded image description

  3. Select ASA → Choose “Advance Subscription Agreement” as the share type. TODO - Uploaded image description

  4. Input Expected Shares → Enter either:

  1. Click ‘Allocate Pending Shares’ → Once all details are entered, click the green 'Allocate Pending Shares' button under the cap table to finalise the addition. TODO - Uploaded image description

TODO - Uploaded image description

Scenario 3: Issuing an ASA During a Funding Round

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.

  1. Go to Cap Table TODO - Uploaded image description

  2. Add ASA as ‘Ordinary Shares’ → You must initially enter ASA shares as ordinary shares (they will be adjusted later). TODO - Uploaded image description

  3. Enter Share Details → Add:

  1. Raise a Support Ticket → Contact FounderCatalyst to convert ordinary shares into ASAs manually. TODO - Uploaded image description

Scenario 4: Issuing an ASA After Closing a Funding Round

Important Notes:

  1. Wait Until Share Certificates Are Signed:
  1. Access the People & Company Sections
  1. Add the ASA Holder to the Cap Table
  1. (If Required) Raise a Support Ticket for Adjustments
  1. Consider an Agile Round (Alternative Approach)

Converting ASAs: Qualifying Financing Event or Longstop Date

  1. Raise a Support Ticket → Notify FounderCatalyst that an ASA needs conversion.

  2. Follow Post-Round Formalities → Complete all closed round steps:

  1. Update Companies House → Submit SH01 to record newly issued shares.

  2. Complete (S)EIS1 Forms → If relevant, file with HMRC.

Other Key Considerations When Using ASAs

  1. Adding ASAs to the Data Room
  1. Warranty & Disclosure Process
  1. SEIS/EIS Implications

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?

  1. Converting an ASA in an Agile Round
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