QR codes for consultants

For consultants the highest-value QR code is a booking link — on business cards, proposal covers and the final slide of every talk. Add case-study deep links in decks and a vCard for contact capture. On projected slides, pair the code with a short URL and keep it up through the Q&A.

The codes that earn their place

Code	Where	Why
Booking link	Cards, proposal covers, end slides	Interest becomes a diary slot without an email exchange
Case-study deep link	Proposals, decks, one-pagers	The reader lands on the relevant proof, not the homepage
vCard	Business cards, badge backs	Saved to contacts before the conversation ends
Social hub	Newsletter footers, event materials	One code for the profile, the podcast, the mailing list

The end-of-talk slide is the highest-stakes placement

A conference talk ends with thirty seconds of maximum attention, and most speakers waste it on a slide shown too briefly with a code too small. The maths is unforgiving: the 10:1 rule says a viewer 10 m from the screen needs a code roughly 1 m across — more than most projected slides can give it. So do both:

Make the code as large as the slide allows — a third of the slide height is not too much on a projected deck.
Print a short, readable URL beside it for the back rows the code cannot reach.
Leave the slide up through the entire Q&A. A code shown for eight seconds gets photographs of a half-loaded camera app; minimum on-screen duration covers why 15 seconds is the floor and minutes are better.

Point the code at the talk's resource page — slides, the relevant case study, the booking link — not at a homepage the audience must navigate.

Proposals and decks

A proposal cover code that opens the booking diary shortens the "shall we discuss?" loop. Inside the deck, deep links matter more than links: a code beside the manufacturing case study should open that case study. Append UTM parameters per document — utm_source=proposal-acme — and your analytics shows which artefacts actually get scanned, which is worth knowing before the next reprint.

What goes wrong

The end slide appears for five seconds before "any questions?" cuts to black.
A calendar-file code where a booking link belongs — a calendar QR adds one fixed event; a booking URL lets the prospect choose a slot.
The same untagged URL on cards, decks and slides, so nothing about what worked is measurable.

FAQ

What size should a QR code be on a presentation slide?

As large as the layout allows — a third of the slide height is reasonable. The 10:1 rule means a viewer at 10 m needs about 1 m of code, which projection rarely delivers, so always pair the code with a short readable URL for the back of the room.

What should a consultant's business card QR code link to?

A booking link, usually. A vCard code saves your details to their phone; a booking code turns interest into a meeting. If the card has room for one code, choose the action you most want taken, and label it so the choice is obvious.

How long should a QR code stay on screen during a talk?

Fifteen seconds is the floor; through the whole Q&A is better. The audience must notice the code, open a camera, frame and scan — and most people only decide to scan after a moment's thought, by which time a briefly shown slide has gone.