Whether you’re pitching to investors, a procurement panel or a big prospective client, the deck does a lot of quiet work. It sets the tone before you speak, keeps you on track while you do, and is often forwarded afterwards to people who weren’t in the room. That’s why pitch deck design deserves more thought than it usually gets.
A weak deck doesn’t just look bad. It makes a good business harder to understand, and that’s the real cost. It also tends to get worse over time, as slides are copied between presentations, updated in a hurry and tweaked by whoever happens to be sending it out that week.
Here are the pitch deck design mistakes that come up most often, with fixes you can apply to your next presentation.
Mistake 1: using slides as a script
Slides packed with paragraphs force the audience to choose between reading and listening. They usually read, faster than you speak, and then stop paying attention to you.
Fix: one idea per slide, with a headline that states the point. Instead of “Market overview,” write “Independent gyms are badly served by the booking software built for chains.” Keep the detail in your speaker notes, or in an appendix.
Mistake 2: no clear story
Many decks are a pile of information in the order it was thought of. The audience has to work out what matters. Most won’t.
Fix: structure the deck as an argument. A common shape that works for many pitches:
- The problem, and who has it
- Your solution, and why it’s better than the alternatives
- Evidence it works: customers, results, traction, credentials
- How you make money, or what you’ll deliver and how
- The team and why they can deliver
- What you’re asking for, and what happens next
Read only your slide headlines in order. If they tell the story on their own, the structure is right.
If someone could read only your slide headlines and still understand the pitch, your deck is doing its job.
Mistake 3: charts that need explaining
A chart with ten colours, a tiny legend and no conclusion makes the audience do the analysis. That’s your job.
Fix: show one message per chart and say it in the headline. Highlight the bar or line that matters in your brand colour and grey out the rest. Remove gridlines, 3D effects and anything decorative. Round the numbers. If the audience needs a second look to see the point, simplify further. And if a table of figures is essential, put it in the appendix and show the one number that matters on the main slide.
Mistake 4: inconsistent design
Decks built by several people, or from slides borrowed from older presentations, end up with different fonts, colours and layouts. It looks rushed, and it quietly suggests the business is disorganised.
Fix: build a proper template with your brand fonts, colours and a set of layouts for the slide types you use most: title, section divider, big statement, chart, image with text, team, and contact. Lock the master slides so people fill in content rather than reinventing the design. Use real photography of your people and work where you can.
Mistake 5: forgetting how it will be used
A deck presented in person and a deck emailed to be read on a phone are different things. One relies on you talking. The other has to stand on its own.
Fix: make two versions if you need both. The presenting version is lean and visual. The “send-ahead” or “leave-behind” version adds enough text to make sense without you, and should still be readable on a small screen. Always export a PDF, check the file size is reasonable for email, and check it opens properly on other devices before sending.
A final pitch deck design check before you present
- Is every number correct, sourced where needed and consistent across slides?
- Are any claims about competitors or the market fair and supportable?
- Does the final slide say exactly what you want the audience to do?
- Is text large enough to read from the back of the room?
- Have you rehearsed with the slides, out loud, at least twice?
A good deck won’t rescue a weak proposition, but a poor one can sink a strong one. If you’ve got a pitch coming up, our presentation and pitch deck design service can rebuild your story and slides, and create a branded template your team can reuse for every presentation after.
