Apr 29, 2025 
IPC announced today the March 2025 findings from its North American Electronics Manufacturing Services (EMS) Statistical Program. The book-to-bill ratio stands at 1.37.
Total North American EMS shipments in March 2025 were up 0.2 percent compared to the same month last year. Compared to the preceding month, March shipments were up 4.2 percent. March’s year-to-date (YTD) shipments decreased by 0.3% year-over-year (YOY).
EMS bookings in March increased 12.7 percent year-over-year and increased 10.5 percent from the previous month. March’s YTD bookings increased 4.0% compared to the same period last year.
“March bookings jumped as buyers raced to get ahead of mounting uncertainty. Concerns over geopolitical tensions and potential tariff hikes have prompted preemptive orders as firms look to secure inventory before conditions worsen,” said Shawn DuBravac, IPC’s chief economist. “But while bookings surged, shipment growth remained relatively flat, reminding us that order volumes have a natural ceiling dictated by production capacity limitations.”
Detailed Data Available
Companies that participate in IPC’s North American EMS Statistical Program have access to detailed findings on EMS sales growth by type of production and company size tier, order growth and backlogs by company size tier, vertical market growth, the EMS book-to-bill ratio, 3-month and 12-month sales outlooks, and other timely data.
Interpreting the Data
The book-to-bill ratios are calculated by dividing the value of orders booked over the past three months by the value of sales billed during the same period from companies in IPC’s survey sample. A ratio of more than 1.00 suggests that current demand is ahead of supply, which is a positive indicator for sales growth over the next three to 12 months. A ratio of less than 1.00 indicates the reverse.
Year-on-year and year-to-date growth rates provide the most meaningful view of industry growth. Month-to-month comparisons should be made with caution as they reflect seasonal effects and short-term volatility. Because bookings tend to be more volatile than shipments, changes in the book-to-bill ratios from month to month might not be significant unless a trend of more than three consecutive months is apparent. It is also important to consider changes in both bookings and shipments to understand what is driving changes in the book-to-bill ratio.
IPC’s monthly EMS industry statistics are based on data provided by a representative sample of assembly equipment manufacturers selling in the USA and Canada. IPC publishes the EMS book-to-bill ratio by the end of each month.
IPC (www.IPC.org) is a global industry association based in Bannockburn, Ill., dedicated to the competitive excellence and financial success of its more than 3,200-member companies which represent all facets of the electronics industry, including design, printed board manufacturing, electronics assembly, advanced packaging and test. As a member-driven organization and leading source for industry standards, training, market research and public policy advocacy, IPC supports programs to meet the needs of an estimated $3 trillion global electronics industry. IPC maintains additional offices in Washington, D.C.; Atlanta, Ga.; Miami, Fla.; Mexico City, Mexico; Munich, Germany; Brussels, Belgium; Bangalore and New Delhi, India; Bangkok, Thailand; and Shanghai, Shenzhen, and Taipei, China.
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