Design7 min read

Pitch Deck Design: 12 Rules That Make Slides Credible

Investors are not grading your taste. They are reading speed and signal: how quickly a slide resolves, and whether the numbers look handled by someone careful.

These are the constraints I apply on client decks, in the order they matter.

Typography and hierarchy

Most decks fail here first. Two typefaces, three sizes, and one weight for emphasis is enough for any investor deck.

  • Write headlines as full sentences that state the claim
  • Set body copy at 18pt or larger so phone reading works
  • Keep one text alignment per slide — usually left
  • Never centre a paragraph of more than one line

Layout and spacing

A consistent grid is what separates a designed deck from a decorated one. Set margins once, place every element on the same columns, and let white space carry the emphasis instead of boxes and shadows.

  • One idea per slide, one visual anchor
  • Equal outer margins on all four sides
  • Align edges, not centres, across consecutive slides

Charts that survive scrutiny

Charts are where credibility is won or lost. Strip everything that is not data, then label the two values a reader needs — the start and the end.

  • No gridlines, no 3D, no drop shadows
  • Label points directly instead of using a legend
  • Never truncate an axis to exaggerate a trend
  • State the metric and the period in the headline

Colour and imagery

One accent colour, used only for the thing you want read first, reads more confident than a palette. Stock photography almost always weakens a slide; product screenshots, diagrams, and real customer artefacts strengthen it.

Consistency is the whole trick

Set a master with your grid, type sizes, and chart styles before designing slide two. Most decks that feel amateur are not ugly — they are inconsistent, and readers register that as carelessness with detail.

Frequently asked

What font should a pitch deck use?

One clean sans-serif for everything, or a sans-serif paired with a single accent face for headlines. Consistent sizing matters far more than which family you choose.

Should I design a pitch deck in PowerPoint, Keynote or Figma?

Design wherever you like, but deliver in the tool the founder will edit. Most investor decks ship as editable PowerPoint or Google Slides plus a PDF for sending.

How much does professional pitch deck design cost?

Independent designers typically charge in the low thousands for a full investor deck; agencies charge more per slide. See the hiring guide for current ranges and turnaround.

Want this done for your deck?

I design pitch decks, sales decks and board reports for founders and executives.

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