How Do I Get Started with Media Buying Without Breaking the Bank?
Key Takeaways
Paid social CPMs typically range from £4 to £12 for most audiences, and programmatic display runs from £1 to £5 CPM on open exchanges - making meaningful advertising accessible at budgets significantly smaller than most brands assume.
Starting with one or two well-defined channels and a clear audience rather than spreading a limited budget across multiple platforms is the most reliable way to generate measurable results early.
One Day Agency can help brands plan and execute media buying strategies across paid social, programmatic, out-of-home, video, and other channels without requiring a large minimum spend to get started.
Media buying has a reputation for being expensive and complicated. Large agencies, complex contracts, multi-million-pound commitments.
Self-serve platforms have lowered the barrier to entry across almost every channel, and a clear, focused strategy can deliver real results on modest budgets.
The biggest risk for small-budget advertisers is not the cost of the media. It is spreading budget too thin across too many channels too early, with no clear measurement framework.
What Is Media Buying?
Media buying is the process of purchasing advertising space or time across channels - social platforms, websites, streaming services, outdoor locations, radio stations, TV channels, and more. A media buyer identifies where a target audience spends its attention, negotiates or purchases the relevant inventory, and manages the campaign to optimise performance. Read more: What is media buying?
Historically, media buying required agency relationships, large minimum spends, and manual insertion orders with publishers. Self-serve platforms including Meta Ads Manager, Google Ads, The Trade Desk, and others have changed this. A brand with £500 per month can now access the same targeting capabilities that large advertisers use, at a smaller scale.
Understanding CPMs and What Budget Buys
CPM stands for cost per thousand impressions. It is the standard pricing unit for display, video, social, and programmatic advertising.
Typical CPM ranges in 2025:
• Programmatic display (open exchange): £1 to £4 CPM
• Programmatic display (private marketplace): £8 to £15 CPM
• Paid social (Meta, TikTok, Instagram): £4 to £12 CPM
• YouTube video: approximately £3 to £7 CPM
• Connected TV: £15 to £30 CPM depending on inventory quality
• Digital out-of-home: priced per panel per fortnight, typically from £100 to £2,000+ depending on location
A £1,000 monthly budget on paid social at a £7 CPM delivers roughly 143,000 impressions. Targeted at a specific geographic area or interest cluster, that is meaningful reach within a defined audience.
The goal is not the volume of impressions alone. The objective is frequency within a defined target audience. An ad seen three to five times by 10,000 relevant people outperforms an ad seen once by 100,000 general users.
Where to Start: Channel Selection
Starting with one or two channels is the right approach for limited budgets. Trying to be everywhere simultaneously dilutes spend to the point where no channel builds enough frequency to have an impact.
Paid Social
Paid social is the most accessible entry point for most brands. Meta (Facebook and Instagram) allows budgets from as little as £5 per day. TikTok and LinkedIn have similarly low minimums.
The advantages of paid social for new advertisers:
• Granular audience targeting by demographic, interest, behaviour, and location
• Immediate campaign launch without long lead times
• Real-time performance data
• Creative formats that can be produced in-house without large production budgets
The disadvantages:
• Increasing competition in most audience segments has raised CPMs year-on-year
• Creative fatigue occurs quickly - creative needs refreshing regularly
• Attribution is complicated by platform-specific measurement windows
PPC (Pay Per Click)
Google Search advertising targets people who are actively searching for what you sell. Because it captures demand rather than creating it, PPC often delivers faster and more attributable returns than awareness-based media.
The disadvantage for small budgets is that highly competitive keywords can be expensive on a cost-per-click basis. Starting with long-tail, specific search terms rather than broad category keywords controls cost while maintaining relevance.
Programmatic Display
Programmatic display advertising delivers banner and display ads across thousands of websites through automated bidding. Open exchange inventory is the most affordable - CPMs of £1 to £4 are achievable. It works best for retargeting (reaching people who have already visited your website) and broad awareness at low cost.
Display advertising alone rarely drives direct conversion for new advertisers. It is most effective as a supporting layer alongside paid social or search.
How Do I Get Started with Media Buying Without Breaking the Bank?
Budget Allocation Framework
For a brand getting started with a modest monthly budget, a practical allocation framework:
• 100% to one paid social channel (Meta or TikTok depending on audience)
• Test two to three ad creative variations
• Optimise for one clear objective (traffic, lead forms, or purchase)
£1,000 to £2,000 per month:
• 60% to paid social (primary channel)
• 30% to PPC search (capturing existing demand)
• 10% to programmatic retargeting (re-engaging site visitors)
£3,000 to £5,000 per month:
• 50% to paid social
• 25% to PPC
• 15% to programmatic or video
• 10% to digital OOH or audio for brand build
Creative and Production
Budget allocation to media is only part of the equation. Creative quality determines how well the media investment performs. A poor ad consuming £5,000 of media spend will deliver worse results than a well-crafted ad on half the budget.
For small budgets, prioritise:
• Clear, specific messaging over generic brand claims
• Mobile-first formats (vertical video, square images) for social
• Strong opening frames for video - the first two seconds determine whether someone keeps watching
• Simple, direct calls to action
Production does not need to be expensive. User-generated content style video, well-photographed product images, and simple text-driven creative can all outperform high-production advertising if the message is right.
Measurement Essentials
Before spending any budget, define what success looks like in concrete terms. Revenue, leads, website visits, and phone calls are all measurable. "Brand awareness" without a measurement mechanism is not.
Set up:
• Google Analytics 4 (or equivalent) with conversion tracking
• Platform-level conversion pixels (Meta Pixel, Google Tag)
• UTM parameters on all URLs to track traffic sources accurately
Review performance weekly in the early stages. Look for which creative, audience, and channel combinations deliver the lowest cost per desired action. Increase budget allocation to what is working and cut what is not.
When to Work with a Media Buying Agency
Self-serve platforms make basic media buying accessible, but there are clear advantages to working with experienced media planners:
• Negotiated rates on programmatic private marketplace inventory not available on open exchanges
• Cross-channel strategy that prevents budget waste from channel conflicts
• Creative briefing informed by channel-specific performance data
• Tracking and measurement setup that attributes correctly across touchpoints
• Market knowledge of what CPMs and conversion rates are realistic for a given category
For brands spending above approximately £3,000 per month on media, agency management typically delivers better performance per pound than self-managed campaigns.
How One Day Agency Can Help
We work with brands at various budget levels, from those building their first media plan to established advertisers scaling existing campaigns. We provide honest advice on where your audience is, what budget is realistic for your objectives, and what performance to expect.
We plan media across all channels from a single brief. That means no silos, no conflicting strategies, and a coherent brand presence regardless of where a consumer encounters you.
If you are ready to start media buying properly, speak to One Day Agency.
“The first question is never 'how much should I spend?' It is 'what does success look like?' Every media plan should start there." - Scott Barrett, Senior Account Manager, One Day Agency
References
SmartyAds: Social Media Ads Cost in 2025 - CPM Benchmarks
Quimby Digital: Current CPM Rates 2025
Augurian: Budgeting Paid Media in 2024
Adsposure: 2026 US Media CPM Benchmark Report
FAQs
How much money do I need to start media buying?
Paid social platforms including Meta and TikTok allow campaigns from as little as £5 per day. A meaningful test campaign typically requires at least £500 per month to generate enough data to optimise from. Google Search campaigns can be started at similar minimums but highly competitive keywords require larger daily budgets to achieve consistent ad delivery.
What is a CPM and is it a good measure of value?
CPM stands for cost per thousand impressions. It measures how much you pay for every 1,000 times your ad is shown. It is a useful comparison metric between channels and formats but is not a measure of business value. A low CPM on an untargeted audience is less valuable than a higher CPM reaching the exact right people. Cost per conversion is a better optimisation target once you have enough data.
Should I start with paid social or Google Ads?
Paid social is generally better for building awareness of a new product or brand. Google Search Ads are better for capturing demand that already exists - people actively searching for what you sell. If your target audience is actively searching for your category, start with search. If you are creating demand for something new, start with paid social.
What is programmatic advertising and do I need it?
Programmatic advertising is automated buying of display, video, and audio ad inventory across thousands of websites and apps. It is useful for retargeting website visitors and broad reach campaigns at low CPM. It is not a first priority for most brands with small budgets - start with paid social or search and add programmatic as a retargeting layer once your primary channels are optimised.
When should I hire a media buying agency?
For brands managing their own campaigns with budgets under £1,000 per month, self-serve platforms are adequate. Above approximately £3,000 per month, working with an experienced media planning agency typically delivers better cost-per-result than self-managed campaigns. The combination of negotiated rates, cross-channel expertise, and proper measurement setup pays for agency fees at this scale.
