Why Build a Financial Model?

Every semester, I teach a financial modeling course for startups at the NYU Berkeley Center for Entrepreneurship.

In it, this is the first thing I address:

Why the heck would anyone want to build a financial model?


For many students, the answer is this:

  • Because someone told me I had to

  • Because I’m a small business owner and my advisor recommended it

  • Or a banker told me I needed one as part of a business plan for a loan

  • Or I’m a startup and I have to build one to get investors

But here’s the thing:

If one of the above is your main reason for building a financial model, you're setting yourself up to build a terrible model that wastes a lot of time.

Why?

Because financial models aren’t for those other people:

They’re for YOU, the founder.

Done well, a financial model:

  • Helps you understand your business drivers - what areas of focus actually matter for your business

  • Let’s you test drive what it’s like to run a new business or to make a change (like a new hire or project) before you spend a dime

  • Helps you make clear-eyed decisions with limited information about potentially life-changing scenarios

  • Allows you to predict the future in your business so you can prepare and set yourself up for success

  • And finally, it teaches you how every part of your business impacts the bottom line.


Sounds pretty great, right?

Okay, so here’s the catch:

To truly realize all those benefits to the full extent, there’s a cost…

You have to build the model yourself.

Now, I know you’d rather find a template online, I know you’d rather use some software, I know you’d rather just hire someone.

But if you do that,

You’ll miss out on the core benefits

That building a financial model

Provides to business owners.

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