Why Pitch Decks Fail: Mistakes to Fix Before You Send One

In 2015, DocSend and Harvard Business School professor Tom Eisenmann studied more than 200 pitch decks. TechCrunch reported that investors looked at a deck for an average of 3 minutes and 44 seconds. That is a decade-old number from a study run by a company that sells document sharing, and I have not found a current figure I trust. Treat it as a reminder, not a law: a reader gives your deck a short time.

Investors scan, they don’t read

This part is my opinion. Few people sit down with your deck the way you sat down to write it. A reader may open it between two other meetings and flick through. So the deck has to work as a scan, not as a document. If a slide needs the founder standing next to it, the slide has failed, because a deck often gets forwarded without the founder.

Mistakes that kill decks

These are my views, not findings from a study.

The opening does not earn attention. A logo slide and a mission statement is not a hook. A number or a product screenshot that makes the reader want the next slide is a hook. The first slide cannot be throat-clearing.

Too much text. If a slide needs the founder to talk to make sense, it fails the version of the deck that gets forwarded. One idea per slide, in as few words as truthfully possible.

No business model, or a vague one. After reading your deck, an investor should be able to explain in one sentence how you make money. This is not about oversimplifying a real business. It is about making sure the one true sentence is on the page.

Hockey-stick projections with nothing under them. A steep revenue chart with no real customer behavior behind it reads as a red flag more than as ambition. Ground every forecast in something that already happened.

No visual hierarchy. Every slide should tell the eye where to land first. A big number, a short headline, one supporting line. If everything on the slide has the same weight, nothing gets read.

No clear ask. A “thank you” slide with no next step wastes the last slide. Say what you want the reader to do next: a round size, a meeting request.

What format buys you

None of the above is about design polish. A deck can look plain and still work, because what fails in most rejected decks is the thinking, not the font. But format is not nothing. A slide that is easy to scan gets read in the short time you have. A slide that is not gets skipped, however good the number is. Readability is the floor. Clear it, and then the content has to do the rest.

What I do differently

I write decks as plain text with Slaide: one file, one idea per slide, and a theme picked once so slide 9 does not drift from slide 2. The format does not win funding. But writing in a text file makes it obvious when a slide has too many words on it. There is no text box to shrink to hide a paragraph. If the sentence is too long for the slide, you feel it while you type.

The content is still the whole game. Know your number, know your model in one sentence, know your ask. The deck’s only job is to not get in the way of the reader finding those three things quickly.