What investors actually do with your financial model
Most founders build a model to impress. Investors open it to stress-test. Here is what happens on the other side of the table, and how to build a financial model for investors that holds up.
The short answer
When an investor opens your model, they are not admiring it. Within a few minutes they are testing three things: do the assumptions make sense, do the numbers connect, and what happens when things go wrong. A clear financial model for investors makes those answers easy to find.
An investor opened a founder’s model last week and closed it in four minutes. The numbers were not wrong. The problem was that nothing in the model told the investor how the founder thought about the business.
This is the gap most founders miss. You build a model to show the business at its best. The investor opens the same file to find out where it breaks. Those are two different documents, and understanding the difference changes how you build yours.
The first few minutes
The first pass is fast. An investor is not reading every cell. They are scanning for the shape of the business: the revenue assumptions, the cost base, the burn, the runway, and the size of the ask. They form an early view in minutes, and the detailed review only happens if that first scan holds up.
So the model has to be readable before it is right. If an investor cannot find your assumptions, cannot follow how revenue is built, or cannot see your cash position without hunting through tabs, the four-minute view is already working against you.
What investors actually check
Once past the first scan, the review gets specific. These are the things an investor looks for in a financial model for investors, more or less in this order:
- The assumptions. Where are they, are they visible, and are they believable? Hidden or hard-coded assumptions are a red flag.
- The logic. Do the numbers connect? If revenue moves, does everything downstream move with it, or are parts of the model static?
- Unit economics. Does a single customer or sale make sense on its own before you scale it up?
- Burn and runway. How much cash leaves each month, and how long does the raise actually buy you?
- The ask. Does the amount you are raising match what the model says you need, with a sensible buffer?
The question behind every cell
The single thing investors care about most is rarely “is this number right?” It is “what happens if you are wrong?” A forecast is a guess by definition, and investors know it. What they are testing is whether you know it too.
That is why a downside scenario matters more than an optimistic one. If your model only works when everything goes to plan, it tells an investor you have not thought about the version where it does not. A model that shows what happens when sales take twice as long to close, or when a key customer leaves, signals a founder who is in control of the numbers rather than hoping for the best.
How to build a model that holds up
You do not need a more complex model. You need a clearer one. A few principles do most of the work:
- Put your assumptions in one place, clearly labelled, so an investor can see and challenge them.
- Build the model so it is connected. One change in an assumption should flow through the whole thing.
- Show at least two scenarios: a base case and a downside. Let the investor toggle the pressure.
- Tie the model to your actuals so it reflects the business as it is, not as it was at your last raise.
- Make the cash position and runway impossible to miss.
If you are preparing to raise, it is worth having someone who has sat on the other side of the table look at your model before an investor does. Our fundraising support and investor readiness work is built around exactly this: making sure the model answers the questions an investor will ask, before they ask them.
Get your model investor-ready
We build and pressure-test financial models the way investors read them, so your raise moves faster and your numbers hold up under questions. Senior CFO support, fixed monthly fee.
Explore Fractional CFO support →Frequently asked questions
What do investors look for in a financial model? +
Investors look at three things first: whether your assumptions are believable, whether the numbers connect across the model, and what happens when conditions change. They are less interested in the headline forecast and more interested in the thinking behind it. A clear financial model for investors makes those answers easy to find.
How long do investors spend looking at a financial model? +
Often only a few minutes on the first pass. An investor scans for the assumptions, the cash position and the logic, and forms an early view fast. The detailed review comes later, and only if the first scan holds up. That is why clarity matters as much as accuracy.
Do I need a financial model to raise a seed round? +
Yes. Even at seed, investors expect a model that shows your assumptions, your burn and your runway, and how the raise changes them. It does not need to be complex, but it does need to be honest, connected and easy to follow.
About this guide. Written by the AI Accounts team and reviewed by Anna Stafford, Founder of AI Accounts, who has around 20 years of experience supporting owner-managed UK businesses through finance, funding and growth. Our team are qualified accountants who review investor models regularly.
