By Patrick · Ask Patrick · June 2026 · 11 min read · Plain English, no marketing degree required
You probably know your business's personality better than you think. You know whether you're formal or casual. Whether you crack jokes or keep things serious. Whether you sound like a trusted expert or a friendly neighbor. The problem isn't that you don't have a brand voice — it's that you've never written it down.
Which means every email, every Instagram caption, every page on your website sounds slightly different. Not bad. Just inconsistent. And inconsistency makes people trust you less, even if they can't explain why.
This guide shows you how to define your brand voice in one afternoon — with AI doing most of the thinking — and how to document it so that every piece of content you (or AI) creates sounds like you.
What you'll walk away with: A simple brand voice document you can paste into any AI chat, share with a contractor, or reference whenever you're writing something for your business. Most people skip this step. The ones who don't write content 3x faster and sound far more professional.
What Brand Voice Actually Is
Brand voice is the consistent personality behind everything your business writes. It's not just your logo colors or your tagline — it's the specific way you use words. Are your sentences short or long? Do you use humor? Do you say "get started" or "begin your journey"? Do you use exclamation marks or do you keep things understated?
The simplest test: if you removed your logo from a piece of content, would someone who knows your business still recognize it as yours? If yes, you have a strong brand voice. If no, you have an opportunity.
Brand voice isn't about being fancy or creative. It's about being consistent. A plumber who always sounds like a knowledgeable friend — never condescending, never jargony, always practical — has a strong brand voice. It doesn't have to be clever. It just has to be reliably, recognizably you.
❌ No consistent voice
Website: "We are dedicated to providing premier plumbing solutions to our valued clientele." Email: "Hey! Just a heads up your water heater's getting old lol." Instagram: "Professional. Reliable. Affordable. Call today."
✓ Consistent brand voice
Website: "We fix your plumbing without the runaround." Email: "Your water heater is getting close to the end of its life — here's what to watch for." Instagram: "Fixed this mess in under an hour. Some days you earn your rate."
The second example sounds like the same person wrote all three. That's brand voice. It doesn't need to be polished — it needs to be consistent.
How to Discover Your Voice With AI's Help
Here's the thing: most small business owners already have a brand voice — they just haven't named it. The fastest way to find it is to have AI analyze content you've already written. Not to copy it, but to reflect it back to you.
Step 1
Gather 5–10 pieces of writing you're proud of
Find emails you've sent that got a great response. Instagram captions that felt like you. A website paragraph you actually liked. Customer messages you wrote that landed well. You're looking for content that felt natural — not the polished stuff you labored over, but the stuff that came out right.
Step 2
Have AI analyze it and name what it sees
Paste your examples into ChatGPT or Claude with the prompt below. AI is surprisingly good at noticing patterns in writing — sentence length, vocabulary level, humor, how you handle technical topics — that you've never consciously thought about.
Copy this prompt
I'm going to share several pieces of writing from my business. I want you to analyze them and describe my brand voice — the consistent personality, tone, and style that shows up across all of them.
Please tell me:
1. How would you describe my tone in 3 adjectives?
2. What makes my writing recognizable — any specific patterns in sentence length, vocabulary, or how I explain things?
3. What do I seem to avoid? (e.g., certain words, formal phrases, technical jargon)
4. Who does my writing feel like it's talking to?
5. Write one sentence that captures my brand voice as if you were briefing a copywriter.
Here are my writing examples:
[paste 5–10 examples, separated by "---"]
Read what comes back carefully. It should feel like looking in a mirror. If something doesn't ring true, note that too — it tells you where your voice has drifted from what you want it to be.
What if you don't have much written content yet? That's fine. Instead of pasting examples, describe how you talk when you're explaining your business to a friend at a barbecue. Tell AI what businesses you like the voice of (and don't like). Say what words or phrases make you cringe. AI can work from that too — it just takes a bit more back-and-forth.
The Four Dimensions of Brand Voice
Once you have AI's analysis in hand, you need to translate it into something usable. The clearest framework has four dimensions. Rate yourself honestly on each one — there are no right or wrong answers, only answers that are true for you.
| Dimension |
One End of the Spectrum |
Other End |
Where Are You? |
| Formality |
Casual, conversational, uses contractions ("you're", "we've") |
Professional, precise, uses full words ("you are", "we have") |
Pick a number 1–5 |
| Warmth |
Cool, matter-of-fact, focused on information |
Warm, friendly, uses "we" a lot, shows care |
Pick a number 1–5 |
| Humor |
Serious, no jokes, all business |
Light, playful, willing to be funny |
Pick a number 1–5 |
| Expertise |
Peer — talking to someone at the same level |
Expert — teaching, guiding, explaining |
Pick a number 1–5 |
This gives you a simple compass. A "3, 4, 2, 4" means: slightly casual, quite warm, almost no humor, and positioned as an expert-guide. That's a very specific personality — and now AI can match it.
How to Write Your Brand Voice Guide in 30 Minutes
Now you have the raw material. Time to turn it into a one-page document you can actually use. Ask AI to do the heavy lifting:
Copy this prompt
I want to create a short brand voice guide for my business. Here's what I know about my voice so far:
Business: [describe your business in 2–3 sentences]
What I sell: [what you offer and who buys it]
Tone adjectives from my writing analysis: [paste the 3 adjectives AI gave you]
My four dimensions scores: Formality [X/5], Warmth [X/5], Humor [X/5], Expertise [X/5]
Words/phrases I never want to use: [list any you know — e.g. "leverage", "game-changing", "synergy"]
Words/phrases that feel like me: [list any — e.g. "straight up", "honestly", "here's the thing"]
A brand I like the voice of: [pick 1–2 — e.g. Patagonia, Basecamp, Mailchimp, your local favorite]
Create a one-page brand voice guide with these sections:
1. Our voice in one sentence
2. We sound like / We don't sound like (3 examples each)
3. Four voice dimensions with a one-sentence description of each
4. Words we use / Words we avoid (5–8 each)
5. Three before/after examples showing our voice applied to generic business writing
Review what comes back. Edit it until it feels right — not just accurate, but like something you'd actually hand to someone and say "write like this." That's your brand voice guide.
Important
Save this document somewhere accessible
A Google Doc works. A Notion page works. Even a sticky note with the key bullet points on your monitor works. The goal is to have it within arm's reach whenever you're writing or using AI to write for you. If it lives in a folder you never open, it doesn't exist.
How to Use Your Voice Guide With AI Every Day
This is where it pays off. Once you have your brand voice guide, you can paste it into any AI conversation and get content that actually sounds like you — not like a generic marketing email from 2019.
For writing emails
Copy this prompt
Here is my brand voice guide:
[paste your guide]
Using this voice, write an email to [recipient] about [topic]. The goal is [what you want them to do]. Keep it under [word count]. Sign it from [your name].
For social media captions
Copy this prompt
Here is my brand voice guide:
[paste your guide]
Write three Instagram caption options for this post: [describe what the post shows or what it's about]. Keep each under 150 words. Don't start with "I" and don't use hashtag phrases like "DM us today."
For website copy
Copy this prompt
Here is my brand voice guide:
[paste your guide]
Rewrite this section of my website in my brand voice:
[paste your current website copy]
Keep the key information but make it sound like a real person wrote it, not a corporate template.
Pro tip: Save your brand voice guide as a "custom instruction" in ChatGPT (under Settings → Custom Instructions → "How would you like ChatGPT to respond?"). Paste your voice guide there, and ChatGPT will apply it automatically — without you having to paste it every time.
For checking your own writing
Even more useful than writing from scratch: ask AI to review something you've already written and flag where you've drifted off-voice.
Copy this prompt
Here is my brand voice guide:
[paste your guide]
Review this piece of content I wrote and tell me:
1. Where does it match my voice well?
2. Where does it drift — sounds too formal, too casual, or not like me?
3. Rewrite the off-voice sections to match my guide.
Content to review:
[paste your content]
Common Brand Voice Mistakes to Avoid
⚠️
Making your voice too aspirational. Defining your voice as "inspiring, bold, innovative" when your business is a neighborhood hardware store sets you up for content that always sounds off. Define the voice you have, not the one you wish you had. You can evolve it over time.
⚠️
Not having a "we don't sound like" column. Knowing what to avoid is often more useful than knowing what to do. "We don't use words like 'leverage', 'game-changing', or 'synergies'" is immediately actionable. Without it, AI drifts into marketing-speak by default.
⚠️
Writing the guide once and forgetting it. Your voice should evolve as your business does. Revisit your guide every 6–12 months. Add new examples. Remove things that no longer feel right. Treat it like a living document, not a finished product.
⚠️
Different voices for different channels. Some variation is fine — you're more casual on Instagram than in a proposal. But your core personality should stay constant. The same person can wear different clothes and still sound like themselves. That's the goal.
⚠️
Overthinking it. You don't need a 20-page style guide. A single page with your four dimensions, 10 example phrases, and three before/after examples is more useful than a binder nobody reads. Done beats perfect — especially when AI can help you draft it in under an hour.
Your Action Plan: This Week
Day 1 (30 min)
Collect and analyze your existing writing
Find 5–10 pieces of content you've written that felt natural. Paste them into ChatGPT or Claude with the analysis prompt. Read the output and decide what rings true.
Day 2 (20 min)
Rate yourself on the four dimensions and draft your guide
Fill in your four dimension scores. Add the words you love and hate. Paste everything into the brand voice guide prompt. Edit the output until it feels right.
Day 3 (15 min)
Apply it to one real piece of content
Take something you need to write this week — an email, a social caption, a website update — and use your new brand voice guide to prompt AI to write it. See how different it feels from what you'd get without the guide. That difference is the point.
The one-sentence version: Your brand voice already exists — AI just helps you name it, write it down, and apply it consistently so that everything you publish sounds like the same person wrote it.
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