How to Advertise on Reddit in the UK: A Small Business Guide
Updated: 6 days ago
Reddit reaches an estimated 33 million people in the UK — its second-largest market after the US — and its self-serve Ads Manager lets any small business run targeted ads from a few pounds a day. Reddit's real edge is intent: you can place ads inside the exact communities and keyword searches where people are already weighing up what to buy. Win by matching the platform's native, no-hype tone and by staying active in the comments after you launch.
Why Reddit deserves a place in your UK media plan
Reddit has quietly become one of the biggest platforms most UK marketers still overlook. In the second quarter of 2026 it reported 130.3 million daily active uniques worldwide — up 18% year on year — and 514.6 million weekly uniques, with advertising revenue of $762 million, up 64% and an eighth consecutive quarter of growth above 60%.
The UK is Reddit's second-largest market after the United States, with an estimated 33 million users. More importantly, Reddit is where people go to make decisions. Shoppers search for 'best accounting software for freelancers', 'X vs Y', and 'is this actually worth it' inside Reddit threads — and those threads increasingly surface in Google and AI search answers too.
For a small business, that buying intent is the whole opportunity. You are not interrupting entertainment; you are showing up in the middle of a genuine research conversation about your category.
How Reddit advertising actually works
Everything runs through Reddit Ads Manager at ads.reddit.com — a self-serve platform similar in shape to Meta's or TikTok's. You build a campaign, choose an objective, then set targeting, budget and creative at the ad-group level.
Most ads are promoted posts. They look like ordinary Reddit posts, appear in the feed and inside communities, carry a 'Promoted' label, and — crucially — allow comments. You can run single-image, video or carousel formats. Larger brands can also buy premium display and takeover placements, but the self-serve promoted post is where almost every small business should begin.
Objectives include awareness, reach, traffic, video views, engagement, app installs and conversions. Choose the one that matches the action you actually care about — for most small businesses that is traffic or conversions.
The targeting options that make Reddit different
Reddit's targeting is its genuine advantage. Alongside the usual location, age, gender and device controls, you get three Reddit-specific levers:
• Community targeting — place your ads inside specific subreddits, such as r/smallbusinessuk or a niche community your product serves.
• Interest targeting — reach users grouped by the broad topics they engage with across the platform.
• Keyword targeting — serve ads against the exact words and phrases people are using in recent posts and comments.
Keyword and community targeting let you reach people by what they are doing right now, not just who they are. One practical rule: keep each ad group to a single targeting method, so you can clearly see what is driving results.
What Reddit ads cost in the UK
Reddit is cheap to get into. The technical minimum is around £5 a day per ad group, and CPMs are often lower than on Meta or TikTok — frequently from well under £1 to a few pounds per thousand impressions, with cost-per-click commonly in the low tens of pence up to around £1, depending on how competitive your targeting is.
In practice, give the system enough to learn from: a realistic test budget is £30–£50 a day for one to two weeks. Start on Reddit's 'Lowest Cost' bidding while the algorithm finds your audience, then switch to a cost cap once you have a reliable cost-per-result to aim at.
How to set up your first campaign
Here is a sensible first-campaign sequence:
1. Create and verify your account at ads.reddit.com.
2. Install the Reddit Pixel (easiest through Google Tag Manager), and ideally the Conversions API, before you spend anything — Reddit often drives assisted rather than last-click conversions, so measurement matters.
3. Create a campaign and pick a single, clear objective.
4. Build two to four ad groups, each using just one targeting method.
5. Upload three to five creative variations per ad group and leave comments switched on.
6. Set your daily budget and start on 'Lowest Cost' bidding.
7. Let it run 7–14 days before making major changes.
Getting the creative right (and staying compliant)
Redditors are famously allergic to anything that sounds like marketing. The ads that work read like a real person who uses the platform: lead with the problem, write in plain language, and favour screenshots or user-style visuals over glossy stock photography. Skip hard 'Buy now' calls to action on a first, cold impression.
Then stay in the comments. Pinning a brand reply that tackles the obvious objections — price, how you compare, who it is for — can lower your cost per result at no extra media cost. Ignoring the thread, or deleting criticism, does the opposite and can backfire fast.
On compliance, UK ads must be obviously identifiable as advertising — Reddit's 'Promoted' label covers that — and the Reddit Pixel sets cookies, so make sure your site's cookie consent meets UK GDPR and PECR before it fires.
Quick FAQ
Is Reddit advertising worth it for a small business?
Yes — if your customers research or discuss your category on Reddit. Its low entry cost and intent-based targeting make it an excellent place to test. Start small, match the platform's tone, and judge it on assisted conversions, not just last clicks.
How much does it cost to advertise on Reddit?
The technical minimum is around £5 a day per ad group, but a realistic test budget is £30–£50 a day for a week or two, so the system has enough data to optimise and you can read the results properly.
How is Reddit advertising different from Google or Meta ads?
Google captures active search intent and Meta targets interests and lookalikes. Reddit lets you target specific communities and keyword conversations, reaching people mid-discussion in a context many competitors still ignore.
Do I need to be active on Reddit organically first?
It helps but isn't essential. You can advertise from a new business account, but understanding the communities you're targeting — and being ready to reply to comments — makes a real difference to results.
Reddit is the most underrated ad platform in the UK right now. The businesses that win here aren't the ones with the biggest budgets — they're the ones willing to drop the sales voice, join the conversation and actually answer the comments. Treat it like a community, not a billboard. — Daniel Nikolla, Founder of Merx Marketing
The takeaway: Reddit rewards relevance over spend. Pick a handful of communities or keywords, write like a real person, keep a close eye on the comments, and you can buy highly intent-rich attention for a fraction of what it costs on bigger platforms.
Have you tested Reddit ads for your business yet — and if not, which community would you start in?
If you would like to know more about this topic, please contact us on danieln@merxmarketing.co.uk
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Written by Daniel Nikolla, Founder of Merx Marketing Ltd and Marketing Minute
