Facebook Ads Cost Per Purchase Benchmarks for Public Administration in Australia

Key takeaways

• This analysis looks at cost per purchase trends for industry Public Administration and target country Australia compared to the global trend, based on $3B worth of advertising data from our dataset, which provides strong directional benchmarks.
• No selected Australia/Public Administration data points were available for the period, so comparisons to the global baseline cannot be quantified; use the baseline as the market-level reference.
• Globally, cost per purchase averaged $47.82 over the last 12 months, with a high of $53.89 in February 2025 and a low of $32.29 in September 2025.
• Seasonality is evident: costs rose into December and remained elevated through Q1, then eased in Q2 and fell sharply in September.
• Volatility was moderate overall (median month-over-month move ~2.37%) but featured notable swings in November–December (+19.3%) and August–September (−29.3%).

What the global baseline shows

Across October 2024–September 2025, the global baseline for cost per purchase points to a clear seasonal profile and a downward finish:

• Average: $47.82
• High: $53.89 (February 2025)
• Low: $32.29 (September 2025)
• Range: $21.60 across the year (about 45% of the annual average)
• Change from first to last month: −30.8% (from $46.67 in October 2024 to $32.29 in September 2025)

Quarterly patterns:

• Q4 2024 (Oct–Dec): $47.13 average, with a December uplift to $51.53.
• Q1 2025 (Jan–Mar): $52.94 average, the year’s most expensive quarter.
• Q2 2025 (Apr–Jun): $49.83 average, easing from Q1.
• Q3 2025 (Jul–Sep): $41.39 average, dragged down by the sharp September dip.

Month-to-month movements underline steady mid-year dynamics contrasted with a few sharper shifts:

• Largest rise: November → December (+19.3%)
• Largest decline: August → September (−29.3%)
• Average absolute monthly change: ~7.0%; median absolute monthly change: ~2.37%, indicating typical month-to-month moves were small with occasional spikes.

Comparison to the selected segment

For Public Administration in Australia, no selected_data was available over the same period. As a result:

• Relative positioning (above market, below average, or in line) cannot be determined.
• Seasonal alignment to the market (e.g., Q4–Q1 increases) cannot be confirmed for the selected segment.

In the absence of selected figures, the global baseline provides a directional benchmark: costs typically climb into December, peak around Q1, soften through Q2, and may drop late in Q3.

Notable spikes and dips

• December uplift: A typical seasonal rise with cost per purchase jumping 19.3% from November.
• Q1 plateau at the top: January–March remained elevated ($52–$54 range).
• Early summer softening: May → June dipped −7.9%.
• Late Q3 drop: August → September fell −29.3%, creating the annual low.

Understanding cost per purchase benchmarks on Facebook Ads in industry Public Administration and Australia helps advertisers make more efficient budget and creative choices.