Facebook Ads Cost Per Purchase Benchmarks for Public Administration

Introduction

Cost Per Purchase for Public Administration held near the mid-$40s to low-$50s for most of the 12‑month stretch, then plunged sharply in June 2026 — a dramatic second‑quarter unwind that leaves the year‑over‑year picture notably lower. 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 Public Administration in All countries available compared to the global benchmark.

The story in the data

The series starts in June 2025 at about $49.01 and finishes a year later at $25.50 — a decline of roughly 48% from start to finish. Across the 13 monthly points the median Cost Per Purchase averaged about $48.2. The high point is March 2026 at $55.54 (roughly 15% above the year average); the low is June 2026 at $25.50 (about 47% below the year average).

Momentum reads as a modest lift through late winter, a pronounced March peak, then a rapid decline across spring into summer. Notable month moves include a march-up of about $5.43 into March 2026 and a cascade starting in April (from $55.54 down to $49.46), continuing through May ($44.90) and collapsing into June (−$19.40 month‑over‑month, a ~43% single‑month drop). Smaller swings punctuate the mid‑year plateau in 2025 — July through October cluster around $49–$53, with November dipping to about $46.

Monthly volatility — measured as the average absolute month‑to‑month change — is roughly $4.2, which translates to an average monthly swing near 8.8% of the mean. The single largest monthly absolute move is the May→June fall (~$19.4).

Seasonal and monthly dynamics

Rhythm across the year is uneven: early summer and autumn 2025 show relatively stable costs in the $49–$53 band, while winter into early spring 2026 produced a peak. The March spike stands out as the strongest upward momentum; the subsequent April–June window marks the most sustained decline. In percentage terms the March high sits about +13% over the June 2025 start, and the June 2026 trough registers roughly −48% from that same start point. The largest seasonal swing in the set occurs in late spring, where costs unwind rapidly over three months.

Performance typically softens through Q4 as competition rises, with engagement rebounding in early Q1; in this series that Q1 rebound materialized briefly as a March high before a late‑Q2 bleed.

Country vs. Global

Because this summary uses the global baseline series for Public Administration across All countries available, the observed pattern represents the benchmark itself rather than a regional deviation. Relative phrasing: the series is “at market” with the global benchmark throughout most months, becomes more volatile in March–June 2026, and ends the period materially below its own prior‑year level (roughly −48%). Month‑to‑month instability is concentrated in the spring, with the widest gap appearing in June when costs dropped roughly 43% versus May.

Understanding Facebook Ads benchmarks and Cost Per Purchase trends for Public Administration across All countries available helps advertisers evaluate how industry ad costs move alongside broader CPC trends, CPM analysis, and CTR performance in a global context.