How to Build a Brand Voice (Tone of Voice)

Every brand has a voice whether it chose one or not. If nobody decided, the voice is simply whoever wrote that particular sentence that day — which is why so many companies sound formal in their emails, chatty on Instagram, and legalistic on their website, as though three different organisations were sharing a logo.

A brand voice is the decision that stops that happening.

Why it matters more than it sounds like it should

Words carry personality faster than visuals do. Read these two sentences: “Your request has been received and will be processed in due course.” And: “Got it — we’ll come back to you tomorrow.”

Same information. Completely different companies. One of them you’d call if you had a problem.

Voice is also the cheapest consistency you can buy. It costs nothing per use, works on every channel, and doesn’t need a design file. And it’s the part of your identity that customers experience most — they read far more of your words than they look at your logo.

Why “professional yet friendly” is not a voice

Almost every brand guideline contains a line like this. It’s useless, for a simple reason: nobody is aiming for unprofessional and hostile. A description that excludes nothing guides nothing.

A real voice definition makes trade-offs. It says what you don’t sound like. It gives a writer something to decide with at 4pm on a Tuesday when they’re stuck on a subject line.

How to actually define it

Start from the brand, not from a list of adjectives. Your voice comes out of positioning. A brand whose promise is precision engineering does not sound like a brand whose promise is warmth. If you skip positioning and jump straight to picking adjectives, you get the “professional yet friendly” problem.

Use dimensions, not labels. Rather than “we are confident”, place yourself on a scale. Formal ←→ casual. Reserved ←→ enthusiastic. Plain ←→ expressive. Serious ←→ playful. Mark where you sit on each, and — crucially — how far you’re willing to move on each in different contexts.

Write the “we are / we are not” pairs. This is the part that does the work. We are direct — we are not blunt. We are warm — we are not chummy. We are confident — we are not boastful. Each pair draws a line, and lines are what writers need.

Show it, don’t describe it. The single most useful thing in any voice guideline is a before-and-after table. Here’s a sentence written wrong; here’s the same sentence written right. Ten of those teach more than three pages of adjectives.

Cover the hard moments. Anyone can sound good in a launch announcement. The voice is tested when you’re apologising for a delay, declining a request, chasing an invoice, or explaining a price. Write examples for those — that’s where brands break character and reveal what they really are.

Rules that keep it usable

Include the practical decisions too, because they’re where inconsistency creeps in. Do you use contractions? Do you address the reader as “you”? Do you say “we” or the company name? How do you handle jargon your customers might not know? Exclamation marks — how many is too many, and the honest answer is usually “one, occasionally”?

These feel trivially small. They’re also the difference between a team that writes consistently and a team that doesn’t.

The same voice, different volume

A common misunderstanding: voice does not mean sounding identical everywhere. It means being recognisably the same person in different rooms.

You are the same person at a client meeting and at dinner with friends — but you speak differently. Your brand does the same. LinkedIn is the meeting; Instagram is the dinner. The vocabulary shifts, the values don’t.

Make it survive contact with reality

A voice guideline nobody reads has no voice. Keep it short enough to read in ten minutes. Give it to everyone who writes anything — sales, support, social, not just marketing. And accept that the voice will drift unless someone occasionally reads what’s going out and says “that isn’t us.”

The test of a voice isn’t whether it’s written down. It’s whether a customer could read three pieces of your writing with the logo removed and know they came from the same place.

Want a voice your whole team can actually use? We define brand voice as part of strategy — with the examples, rules and hard-moment guidance that make it stick. Explore brand strategy or talk to us.