How to write brand voice guidelines

What brand voice guidelines are, and why voice is where brands drift

Voice is the personality of your brand expressed in words. It is the difference between "We regret to inform you that your order was unsuccessful" and "That order didn't go through, let's fix it." Same fact, different brand. Visual identity gets locked down early, because a wrong logo or off-palette color is obvious to everyone. Voice slips quietly. A caption that is a shade too formal, a claim phrased a little too strongly, a joke that lands wrong for the market. Each one looks fine in isolation, and together they pull the brand off its center.

Voice drifts faster than visuals for a simple reason. Far more people write for a brand than design for it. Creators, agency freelancers, junior marketers, regional teams, and now generation tools all produce copy. Design usually passes through a small, trained group. Words come from everywhere. Without written guidelines, every one of those writers falls back on their own instinct for what sounds right, and "on-brand" fractures into as many versions as there are contributors.

Written voice guidelines fix a single reference. Instead of "make it sound like us," which only the founder can reliably judge, a writer gets concrete rules they can check their own draft against before anyone reviews it.

What brand voice guidelines should include

Vague guidance is worse than none, because it sounds finished without changing what anyone writes. "Be friendly, professional, and human" describes almost every brand and helps no one. Useful brand voice guidelines are specific and testable. Five parts do most of the work.

1. Personality adjectives, defined. Pick three to five traits and define each in one line, because the adjective alone is ambiguous. "Confident" to one writer means bold claims; to another it means calm understatement. Pin it down:

• Direct means we lead with the point and cut hedging words like "just," "really," and "actually."
• Warm means we write to one person, use "you," and never sound like a policy document.
• Precise means we prefer a specific number or fact over an adjective.

2. Do and don't pairs. The fastest way to teach voice is to rewrite the same sentence two ways. Pairs turn an abstract trait into a visible edit:

3. Banned terms and phrases. List the words your brand never uses, and the reason. This is the single most enforceable part of a voice guide, because a banned word is a yes or no check. A short banned list might rule out "synergy," "revolutionary," "game-changing," and "best-of-breed" as empty marketing filler, along with any competitor names and any claim words your legal team has flagged. Add the phrasings you overuse, so the list catches habits, not just words.

4. Tone by channel. Voice stays fixed, but tone shifts with context, and guidelines should say how. A welcome email can be warmer and longer. An error message is plain and short. A paid ad is tighter and leads with the benefit. A compliance disclosure is literal, with no personality at all. Map each channel you actually publish to, and note what changes.

5. Worked examples. End with two or three pieces of real copy annotated to show the rules in action, since a rule stays abstract until a writer sees it applied to a live post. For a fuller structure to build on, Frontify's guide to brand guidelines shows how voice sits alongside the visual sections of a brand system.

The problem: most teams document the look, not the sound

In our 2026 research into how marketing teams keep content on-brand, a clear pattern showed up. Nearly every team we interviewed had visual guidelines, a logo sheet, a palette, type rules, and almost none had voice written down anywhere. "On-brand" for copy meant whatever the approver felt was right on the day. Most teams told us they only caught off-brand content after it was already published, when a takedown and a round of revisions were the only fix left.

The cost is not one bad post. It is that voice review sits entirely on one person, and that person becomes the bottleneck the moment volume rises. When a single approver holds the standard in their head, they cannot scale it, hand it off, or take a week away without quality slipping. Writing the guidelines down is the first move. It takes the standard out of one head and puts it somewhere every contributor can reach. Read the full research.

How to make brand voice guidelines enforceable

A written guide is necessary and not sufficient. A document does not read your drafts for you. Someone still has to hold every caption, email, and ad against the rules, and at real volume that check is exactly what breaks. The guidelines exist, and off-brand copy ships anyway, because no human has time to compare hundreds of drafts to a page of rules.

Making voice enforceable means moving the check from a person to the workflow. In DashoContent, you encode your voice guidelines in a Brand Card, the single place your personality traits, banned terms, and channel tone live as machine-checkable rules. Every draft is then run through a Content Scorecard that scores it against that Brand Card before a human reviews it, flagging off-brand tone, banned phrases, and unsupported claims. The reviewer stops hunting for slips and starts approving work that already cleared the rules.

This is the shift from brand governance as a feeling to brand governance as a system. The voice guide defines the standard; the Brand Card and Scorecard apply it to every piece, consistently, whoever wrote it. See how brand compliance checks work, or start from what brand governance is.

Get a starting template

You do not need to write brand voice guidelines from a blank page. Our brand guidelines template gives you the sections above as a fill-in structure: personality adjectives with definitions, do and don't pairs, a banned-terms table, tone-by-channel notes, and space for worked examples. Fill it once, then encode it in a Brand Card so the rules do more than sit in a document.