Ask a project manager how long a deck takes to build and you'll get an answer like "a few hours." Ask them to actually log it — from the first blank slide to the version they send the night before the meeting — and the number usually doubles, sometimes triples. Nobody's lying. They're just not counting the parts that don't feel like "building the presentation": the fifteen minutes hunting for last quarter's icon set, the reformatting after the CFO wants "more blue," the third pass because the timeline slide looked fine at 100% zoom and terrible on the boardroom projector.

That gap between the felt time and the logged time is where the "20+ hours saved" claim around ready-made templates actually lives. It's not marketing shorthand for "templates are nice." It's an accounting problem — most teams simply aren't tracking where their presentation hours go, so they underestimate the cost of building from scratch and overestimate how much a template shortcuts.

Where the hours actually disappear

A B2B study run by GfK on behalf of Made in Office found that employees who regularly work with PowerPoint spend close to 20 hours a month on presentations, and roughly 8 of those hours go specifically into formatting — not writing, not strategizing, just aligning shapes, fixing fonts, and rebuilding charts that already existed in an older file. That's 40% of total presentation time spent on work that produces zero new content.

Multiply that across a quarter. If a single mid-level employee touches three to four presentations a month — investor updates, client pitches, internal reviews — the formatting line alone adds up to something close to a full working week every month, spent on tasks that a properly built template eliminates before the file is even opened. I've seen this play out almost identically across consulting teams and in-house marketing departments: the strategic thinking takes an afternoon, and the visual execution eats the rest of the week.

The 20-hour number, broken down

A single "20 hours per project" figure sounds like a nice round marketing claim until you break it into where it actually comes from. On a typical multi-deck business project — say, a quarterly investor update plus two internal working versions — the time usually splits across four buckets:

  • Structural setup — building the master slide, color system, and layout grid from nothing. This is the part a ready-made template eliminates almost entirely, since the structure already exists and only needs your brand colors dropped in.
  • Chart and diagram construction — manually building process flows, timelines, or comparison matrices in native PowerPoint shapes rather than using SmartArt (which, fairly or not, reads as dated the moment a board member sees it).
  • Consistency passes — going back through 20-30 slides to catch the one where the font size drifted, the icon style doesn't match, or the spacing looks off next to its neighbors.
  • Revision cycles — the stakeholder feedback loop, which template quality doesn't eliminate but does shrink, because you're adjusting an already-coherent design instead of defending a structure that was never fully resolved to begin with.

Here's the part that surprises people: the first two buckets, not the revision cycles, usually account for the bulk of the wasted time. Teams assume stakeholder feedback is the time sink. In practice, the feedback loop is often fast — it's the structural rebuild after feedback that's slow, because a hand-built deck doesn't have the grouped, consistent objects that make a quick edit actually quick.

Why "just reuse an old deck" doesn't work the way people think

The same GfK research found that 78% of presentations get created by recycling existing slides rather than starting from a truly blank file — which sounds efficient, and often isn't. Reusing an old deck carries forward every inconsistency the original had, plus whatever's shifted since: a rebrand, a new product line, a chart that no longer reflects current data but still looks finished enough that nobody double-checks it.

This is where I'd push back on the standard advice to "build a template library from your best decks." That works if someone owns the maintenance of that library — updating it when the brand guide changes, retiring slides that reference discontinued products. Most teams don't have that role. What actually happens is the library slowly degrades into a folder of "decks that mostly still work," and each new presentation inherits a bit more visual debt than the last. A maintained, professionally structured template avoids this because the update responsibility sits with whoever built and maintains the template category, not with whoever happens to be finishing a deck at 9pm.

Where ready-made templates genuinely save time — and where they don't

It's worth being honest about the limits here, because "templates save 20 hours" isn't universally true. If your presentation needs a genuinely novel visualization — a data relationship nobody's diagrammed before, a brand-new product mechanic that doesn't map to any existing layout — a template gets you partway there at best, and forcing your content into the wrong structure can cost more time than it saves. I wouldn't recommend starting from a timeline template for content that isn't actually sequential just because the deck needs "something visual." Where templates earn their keep is the opposite scenario: recurring presentation types with well-understood structures. Investor updates, quarterly business reviews, sales decks, and client-facing consulting presentations follow patterns that have already been solved dozens of times. There's no strategic value in re-solving "how should a market analysis slide be laid out" from scratch every quarter. The layout logic — where headers sit, how much white space surrounds a chart, how phase labels relate to date markers — is a solved problem, and treating it as one frees up actual thinking time for the content that's genuinely new.

The part nobody mentions: process diagrams are their own time sink

Formatting gets most of the attention in these conversations, but process and workflow diagrams deserve their own line item. Building a five-step process flow from PowerPoint's native shapes — boxes, connectors, arrows that need to align at consistent angles — is deceptively slow. What looks like a ten-minute task turns into forty once you're nudging individual connector points to stop them from overlapping text labels.

A pre-built process diagram collapses that into something closer to five minutes of actual work: swap the label text, adjust the step count if needed, done. The visual logic — spacing, arrow weight, how decision points are marked — was already decided by someone whose job was specifically to solve that layout problem, which is a different skill than knowing what your five process steps should say.

What this actually changes about how you should plan a project

If you accept that roughly 8 hours a month per person disappears into formatting rework, the practical implication isn't "buy templates and stop thinking about design." It's that the design decision should happen once, early, and deliberately — not slide by slide as the deck gets built. Pick the structural approach (which template family, which color system, which diagram style) before content gets dropped in, rather than discovering halfway through a 30-slide deck that the visual language doesn't hold together.

That single sequencing change — structure first, content second — is a bigger time-saver on its own than most formatting shortcuts, and it's the one thing a ready-made template forces you to do simply because the structure already exists before you start typing.