Facebook Ads Cost Per Purchase Benchmarks in United States

Introduction

The headline: cost-per-purchase in the United States ran a touch above the global benchmark for most of this 13‑month window, then plunged sharply in July 2026. 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 the United States compared to the global benchmark.

The story in the data

Across July 2025–July 2026 the United States averaged roughly $50.00 per purchase (mean ≈ $50.0), with a median near $52.7. The high point arrived in March 2026 at about $59.22 per purchase; the low was July 2026 at $18.61 — a dramatic end‑point that represents about a 65% decline from the period start ($52.71 → $18.61). Over the year the US series shows several pronounced moves: an early run-up from July–October into the mid‑$50s, a November dip into the high‑$40s, a rebound through March to the peak, and then a steady slide into June before the steep fall in July. Average month‑to‑month absolute movement was about $5.63, reflecting meaningful monthlies swings rather than a placid flatline.

Seasonal and monthly dynamics

Rhythms appear across quarters: late summer into fall (Aug–Oct) saw elevated costs in the mid‑$50s, followed by a softer November and a December uptick into the low‑$50s. March produced the maximum lift in the window. Spring (Apr–May) softened again into the high‑$40s and low‑$40s before the large June→July collapse. These patterns align with typical seasonal pressure points — rising competition into Q4 and visible rebounds into early Q1 — though the July 2026 decline stands out as an unusually sharp discontinuity relative to preceding months.

Country vs. Global

Compared with the global (baseline) series, the United States generally ran above market. The US mean (~$50.0) sat about 5.2% higher than the global average (~$47.6). Month‑by‑month the US outpaced the global benchmark most months by roughly 1–8% (smallest gap ~+1.3% in May; largest ~+8.4% in December). The final month reversed that pattern: July 2026 saw the US about 5.5% below the global benchmark as both series experienced a steep drop. Volatility in the US series was also higher — average absolute monthly change ~$5.63 vs baseline ~$4.78, roughly an 18% bigger swing.

Closing

This review of cost per purchase — framed within Facebook Ads benchmarks, CPC trends, CPM analysis and CTR performance conversations — shows that All industries in the United States tracked modestly above global ad costs for most of the year, with pronounced seasonality and a sharp July 2026 decline that narrowed and then inverted the usual gap between US and global benchmarks. Understanding these country-specific ad costs for All industries in the United States helps contextualize industry ad performance against broader global patterns.