Instagram captions for business. What to put in the first 125 characters.

Good Instagram captions for business start with a strong hook in the first 125 characters, use the plain words people would search for early on, and stop at about 150 words. Instagram allows 2200 characters, but you rarely need more than a fraction of that. The opening line matters most, because only the first 125 characters show before "more".

This guide sets out current good practice for business accounts as of October 2026, from the Desk's own guidance on Instagram. It covers image and carousel posts first, then what changes for Reels. Our view is simple to state: the first 125 characters do most of the work. Put your hook and your topic's plain-word keywords there. Hashtags come last, and they're optional, with no more than 5.

How long should an Instagram caption be?

The limit for an image or carousel caption is 2200 characters. The useful length is much shorter. A strong first 125 characters, then up to about 150 words in total, is enough for almost any post.

The reason is how captions appear in the feed. Only the first 125 characters show before the "more" link. Anything after that is hidden until someone taps. So the hook has to sit inside those 125 characters, or most people won't see it.

Here's a worked example. Picture a bakery announcing a new loaf. This opening line is 116 characters, including spaces and punctuation:

"Gluten-free sourdough is now on the shelf every Saturday. Here's what changed in the recipe, and how to order ahead."

All of it shows before "more". A reader scrolling past learns what's new, when it's available and that there's a way to order. The search terms, gluten-free and sourdough, are in the first two words.

Now try a warmer, longer opening:

"Happy Friday, everyone. We hope you've all had a lovely week and are looking forward to a quiet weekend with family and friends."

That runs to 128 characters. The cut at 125 falls in the middle of "friends", and the reader has seen a greeting and nothing else. The news about the loaf sits below the fold, where most people never look. Nothing in the visible part tells a scrolling reader, or Instagram's search, what the post is about.

A quick way to check your own drafts is to paste the opening line into any character counter before you post. If the point of the post isn't inside the first 125 characters, move it up. Pleasantries can go further down, or be cut.

Keywords or hashtags: which matters more?

Keywords in plain words matter more. Instagram search reads captions, so the words you use to describe your topic help people find the post. Use the natural words for the topic, the ones a customer would type, and use them early.

Hashtags still have a place. Use at most 5 relevant hashtags, and put them at the end of the caption. They support the words above them; they don't replace them.

A common mistake is a caption that opens with a block of hashtags and never names the topic in ordinary language. It fills the visible 125 characters with tags, gives readers no reason to tap "more", and gives search less to work with. If a post is about a boiler service offer, say "boiler service" in a sentence near the start. If it's about a members' training day, say "training day" and what it covers.

A simple order works for most posts:

1. Open with the hook, using the topic's plain-word keywords.
2. Give the detail in a few short paragraphs.
3. Finish with one ask.
4. Add up to 5 relevant hashtags at the very end, if you use them at all.

How should the rest of the caption be laid out?

Use short paragraphs with line breaks between them. On a phone screen, a single dense block of text is hard to read. Two or three short paragraphs, each with one idea, are easier to take in.

Then finish with one ask. It can be a question, such as which flavour readers would like next, or a request to share, such as "send this to someone who…". Choose one.

For a member organisation, the ask might be a question about which session members would attend. For a trade business, it might be a prompt to send the post to someone who's been putting off a repair. Pick the one action that matters most for that post, and make it the last line before any hashtags.

Why don't links work, and what do you do instead?

Links don't work in Instagram captions. If you paste a web address, readers can't tap it. Most won't copy it out by hand.

Point readers to your profile or the "link in bio" instead, and say so in plain words. "Booking details are in our bio" is clearer than a long address no one can use. If you manage several client accounts, check that the link in each profile matches what the latest post promises before it goes live: a caption that sends people to the bio only helps if the bio leads where it says.

What changes for Reels?

Reels are ranked on watch time, replays and shares by DM. That changes what you're aiming for. A Reel does well when people watch it through, watch it again and send it to someone.

The caption rules carry over. Put the hook in the first 125 characters, favour plain-word keywords over hashtags, and use no more than 5 hashtags. The worked example above applies to a Reel caption in the same way.

Two things are specific to Reels.

First, say the keyword aloud. Instagram reads speech as well as captions, so the words spoken in the video count. If the Reel is about gluten-free sourdough, say "gluten-free sourdough" in the first few seconds, as well as writing it in the caption. It helps the Reel get found, and it tells viewers straight away what they're watching.

Second, invite a share. Because shares by DM feed into how Reels rank, a line such as "send this to someone who…" is a sensible choice for your one ask. Finish it with a specific person: someone who's planning a kitchen refit, someone who's just joined the association, someone who can't eat gluten. The more clearly a viewer can picture who to send it to, the easier the share becomes.

The format is fixed in a few ways. Reels are vertical, at 9:16, and short. Keep the length between 20 and 170 seconds. Within that range, choose the shortest length that tells the story, since watch time and replays are part of how a Reel is judged.

For a business filming its own Reels, a workable plan looks like this. Write the caption hook first, with the keyword in it. Open the video by saying that keyword. Keep the clip to what the story needs. End with the share prompt, spoken or written, and match it in the caption.

How long will this advice hold?

These are good-practice rules as of October 2026. They aren't permanent. Instagram changes how it displays captions, ranks posts and reads content, and the figures in this guide could shift with it. If you're planning a campaign that runs for months, or building templates for several client accounts, check the rules again before you rely on them.

What's least likely to change is the habit underneath: say what the post is about, in plain words, where people will see it. That serves readers whatever the current limits are.

Nothing in this guide is invented. Each figure, from the 125 characters to the 5 hashtags and the 20 to 170 seconds, comes from the Desk's current guidance on Instagram for business accounts, and you can check every one of them against your own posts.

See how the Desk writes social posts and video scripts in your voice, held for your approval.