Seed vs Series A funding: what changes for founders?
Updated: Oct 7

You have raised a seed round, built the product and started winning customers. Now you are considering Series A.
It can be tempting to approach it as a larger version of the same fundraising exercise. Update the deck, increase the forecast and reconnect with investors.
But the business has moved on. Your preparation needs to show what you have learned, what the evidence supports and how the next investment will help you build from here.
The distinction between seed and Series A is not a universal revenue threshold or round size.
Expectations vary by sector, business model and investor. Broadly, the emphasis shifts from exploring an opportunity towards demonstrating why it can become a substantially larger business.
Here is what that means for your preparation and your role as founder.
1. Your evidence needs to develop alongside your story
At seed, the opportunity, founding team and early evidence may carry much of the investment case.
By Series A, expect deeper questions about what has happened since.
For a B2B software business, that might include:
Which customers buy and why
Whether they keep using the product and renew
How long it takes to win a customer
What it costs to deliver and support the service
Whether sales depend on the founder’s personal involvement
Other business models will need different evidence. A company developing a complex technology may need to demonstrate technical progress, commercial partnerships or regulatory milestones.
The useful question is: “What have we learned or demonstrated that makes this a stronger investment proposition than it was at seed?”
Be equally clear about what remains uncertain.
2. Understand the investor’s process
Seed does not mean angels only, and Series A does not mean your first encounter with a venture capital fund. Funds invest at different stages, while angels can participate in later rounds.
Research the specific investor rather than relying on assumptions about the label.
Before investing significant time, establish whether your stage, sector, location and funding needs fit their approach. Ask how decisions are made, who needs to be involved and what they would need to understand before progressing.
A positive conversation with one person is useful, but it may be one step in a wider process.
Keep track of what has actually been agreed and what needs to happen next.
3. Build a financial model you can explain
Your model should connect your plans to the resources they require.
If revenue is forecast to grow, what drives that growth? More salespeople, better conversion, larger contracts, higher retention or a combination? How long before new hires become productive?
Make the important assumptions easy to find and change. Test what happens if sales take longer, costs rise or recruitment slips.
Agree an appropriate forecast period with your advisers and prospective investors. There is no reason to assume every fund plans to exit exactly five years after investing.
Most importantly, understand the model yourself. A polished spreadsheet is of limited use if you cannot explain why its assumptions are reasonable.
4. Make your fundraising materials tell a consistent story
Your deck, financial model and supporting documents should agree on the opportunity, evidence, funding requirement and intended milestones.
Start with a clear account of:
The problem you solve and who experiences it
What customers value about your solution
What progress you have made
How you expect the business to grow
What the investment will enable
Why your team can deliver the plan
A short introduction can help an investor understand the proposition quickly. A presentation deck should leave room for discussion. Supporting material can answer questions that need more detail.
You do not automatically need a lengthy business plan, two decks and several overlapping summaries. Prepare what makes your case clear and respond to each investor’s requirements.
A one-page introduction is also different from an investment memorandum, which may be a much more detailed document.
5. Prepare your data room before it becomes urgent
A data room is an organised collection of documents used during an investor’s detailed review of the business.
Depending on the company and transaction, it may include financial information, ownership records, customer contracts, employment documents and evidence of intellectual property ownership.
Begin by establishing what exists, what needs updating and who is responsible for it. Use clear file names, dates and version control.
Keep figures consistent with your deck and model. If two documents report different revenue numbers, be ready to explain why.
Work with your legal and financial advisers on what to share and when. Sensitive customer, employee or commercial information needs appropriate handling and controlled access.
The aim is to make the business understandable and address gaps early.
6. Give fundraising preparation an owner and enough time
Gathering evidence and answering follow-up questions can take more work than founders expect.
Decide which tasks require your attention and which belong with your finance lead, leadership team or advisers. Agree responsibilities before requests start arriving.
Someone also needs to keep the process organised: maintaining documents, tracking conversations and following up on commitments.
Meanwhile, customers still need serving and the business still needs leading.
Think through who will make operating decisions while you are occupied with fundraising. If everything stops without you, that is a leadership issue worth addressing before the process intensifies.
7. Consider the relationship you are entering
The amount raised and the valuation are only part of the decision.
Understand how the proposed terms affect ownership, decision-making and future choices. Get appropriate legal advice on the documents and ask questions until you understand their practical implications.
Speak to founders the investor has backed. Ask what happens when performance falls short, priorities change or another round takes longer than expected.
Discuss expectations with your co-founders too. How quickly do you want to grow? What responsibilities are you willing to take on? Where might your ambitions differ?
It is better to surface those differences before signing than discover them under pressure later.
What should you do next?
Start by comparing the business you described at seed with the business you have today.
What did you expect to happen? What actually happened? What have you learned, and how has the plan changed?
That gives you a stronger starting point than simply refreshing the slides.
If you are still weighing up whether to raise, read Is your business ready for venture capital investment?.
Think through the next stage with someone alongside you
Moving from seed towards Series A can change your responsibilities, your team and the expectations placed on you.
I coach and mentor founders as they work through these decisions, drawing on my experience of building and exiting two technology businesses. Our conversations make room for the commercial questions and what they mean for you as the person leading the business.
Explore how we can work together, starting with a free introductory conversation.
Cheers,
Duncan




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