TikTok Ads vs Meta Ads in 2025: Where Should Your Paid Social Budget Go?

The Honest State of Both Platforms in 2025

Meta has more total users (3.2B monthly actives across Facebook/Instagram) and a more mature ad platform with better measurement, attribution, and campaign automation. TikTok has the fastest-growing ad platform by revenue, the highest organic reach potential, and an audience that skews younger and more discovery-oriented.

Neither platform is objectively better. The right split depends on your product, target audience, creative capability, and where you are in building purchase intent. Most brands perform best on both simultaneously — the question is weighting and creative strategy per platform.

Audience Comparison: Who You're Actually Reaching

Meta strengths: Unmatched breadth of demographic coverage — effective for targeting 35–65 age groups that barely use TikTok. Superior purchase-intent targeting via pixel data and purchase behaviour audiences. Better B2B and high-consideration purchase targeting through LinkedIn-equivalent interest data.

TikTok strengths: Dominant reach for 18–34 demographics in UK, US, and Australia. The "discovery economy" — 74% of TikTok users report discovering new products on the platform (vs 60% on Instagram). Emerging strong performance for 25–44 demographics as the platform matures.

The age inflection point: For consumer brands targeting primarily under-35 audiences, TikTok's audience quality increasingly matches or exceeds Meta's. For brands targeting 40+, Meta remains clearly dominant.

CPM and Cost Comparison

CPM (cost per thousand impressions) comparison as of Q2 2025:

• Meta Instagram Feed: £8–£16 CPM average for e-commerce audiences in the UK
• Meta Facebook Feed: £5–£10 CPM — cheaper but lower purchase intent
• TikTok In-Feed: £6–£12 CPM — competitive with Meta, often lower for 18–30 demographics
• TikTok TopView: £30–£50 CPM — premium placement, brand awareness focus

Raw CPM comparison favours TikTok for younger audiences. But CPM only tells half the story — conversion rates vary significantly. Meta typically converts at higher rates for warm audiences (retargeting) due to stronger intent signals. TikTok typically converts better for cold audiences discovering a product for the first time.

Creative Requirements: The Real Differentiator

This is where many brands struggle with TikTok — and it's the primary reason to be realistic about your capacity before committing budget.

Meta creative requirements: 4–8 active creatives per campaign. Refresh monthly. Static images, carousels, and video all perform. Brand-produced content works well.

TikTok creative requirements: 20–40 active creatives. Refresh weekly. Video-only (effectively). Authentic, native-feeling content heavily outperforms polished brand creative. UGC creators almost always outperform brand content.

If you can produce 8 new video creatives per week (via UGC creators, Spark Ads, or internal production), TikTok can deliver exceptional results. If you can only produce 2–3 per month, you'll likely see diminishing returns after the first 4–6 weeks.

The Budget Allocation Framework

Rather than choosing one platform, the higher-performing approach is strategic allocation across both:

For brands spending £100–£500/day total:
Meta 70% / TikTok 30%. Meta's lower creative requirements and stronger retargeting make it the lower-risk primary channel. TikTok allocation funds creative testing and audience prospecting.

For brands spending £500–£2,000/day:
Meta 50–60% / TikTok 40–50%. At this spend level, creative production capacity becomes the constraint. Invest in a UGC creator network before scaling TikTok beyond £500/day.

For brands spending £2,000+/day:
Run both at full capacity — the marginal value of each incremental pound on Meta decreases as audience saturation grows, while TikTok provides incremental reach into audiences not reachable on Meta.