Facebook Ads Cost Per Purchase Benchmarks in United Kingdom

Introduction

Across all industries in Great Britain, Facebook Ads cost per purchase ran higher than the global benchmark and moved with notably sharper swings. The year opened with a soft January, vaulted to a March peak, collapsed into early summer, then rebounded hard in August before easing into autumn. The standout moments: a March high that was far above market, a June–July trough, and an August snapback that reset costs upward.

This analysis is based on $3B worth of advertising data from our dataset, which provides strong directional benchmarks. This analysis explores ad performance trends for all industries in Great Britain compared to the global benchmark.

The story in the data

From November 2024 to October 2025, Great Britain’s cost per purchase averaged 57.8, with a median of 58.7. The series started at 56.52 in November and ended at 46.72 in October, a 17% decline end-to-end. The high came in March at 87.24, while the low hit in June at 36.38, a range of roughly 50.9 points.

Monthly momentum defined the narrative:

• December dipped slightly (50.73), then January slid further to 40.40.
• From January to March, costs surged +116% to the annual high (40.40 → 87.24).
• April cooled to 61.25, May lifted again to 75.86, then June fell sharply to the annual low (36.38), with July steady at 36.53.
• August whiplashed back up to 72.94, before easing through September (60.93) and October (46.72).

Volatility was pronounced: the average absolute month-to-month change in Great Britain was 18.7 points, far choppier than the global series at just 2.6. The biggest single drop was May → June (−39.48), and the largest jump was July → August (+36.40).

Seasonal and monthly dynamics

Holiday-period costs in Great Britain were elevated but not extreme, with November (56.52) higher than December (50.73). January marked a trough, followed by a late-Q1 surge culminating in March’s peak. Spring moderated, then early summer compressed sharply across June and July—the softest stretch of the year—before a late-summer rebound in August. Autumn drifted lower from that August reset, closing October near the mid-40s.

This rhythm contrasts with typical seasonal expectations where Q4 competition often sustains higher costs; here, the most intense price pressure clustered in late Q1 and late summer, not December.

Country vs. Global

Great Britain outpaced global cost per purchase on average by about 17–18% (57.8 vs. 49.3). It ran above the global benchmark in 9 of 12 months, lagging only in January (−22%), June (−24%), and July (−23%). At its narrowest gap, December sat just 1% above the global median; October was also relatively close (+8%). At its widest, March soared 66% above global levels, with August (+45%) and May (+48%) also showing substantial premiums.

While the global series was steady—hovering in a tight 43–54 band and ending nearly flat from November to October—Great Britain’s path was more volatile and ultimately trended lower from its November starting point despite major intra-year peaks.

Closing

Understanding Facebook Ads cost-per-purchase benchmarks for all industries in Great Britain highlights a market that typically sits above global levels but moves through larger swings—marked by a late-Q1 peak, a mid-year low, and a late-summer rebound. These country-specific ad costs provide context for broader Facebook Ads benchmarks alongside CPC trends, CPM analysis, and CTR performance comparisons to the global market.