Box Makers Struggle to Pass on War Costs

Why It Matters

Rising freight and energy costs erode margins just as demand contracts, threatening profitability across the corrugated packaging sector and pressuring supply‑chain pricing.

Key Takeaways

• Higher diesel costs add $8‑10 million quarterly to Sonoco
• Smurfit Westrock expects $270‑$290 million energy impact this year
• Linerboard prices rose back‑to‑back, first time in five years
• Corrugated shipments hit 10‑year low, weakest since 2015 seasonally
• Consumer sentiment record low, further dampening box demand

Pulse Analysis

The corrugated packaging market entered 2026 already on a downward trajectory after the pandemic‑driven e‑commerce surge faded, leaving manufacturers with excess capacity and weaker consumer spending. Inflationary pressures and recent tariff cycles trimmed demand for traditional cardboard boxes, prompting plant closures and a shift toward alternative materials such as flexible films. The latest shock comes from the Middle East conflict, which has spiked diesel freight rates and lifted energy prices, inflating input costs for major players like International Paper, Sonoco, and Smurfit Westrock.

Higher transportation expenses have forced producers to raise linerboard prices in consecutive months—an uncommon move in the past five years—while still battling soft order books. Smurfit Westrock now anticipates a $270‑$290 million energy hit, up sharply from the $80 million increase it had expected before the crisis. Sonoco’s CEO flagged an $8‑$10 million cost addition for the second quarter, primarily from freight, and International Paper reported only marginal order‑pattern changes despite the broader market slowdown. These cost pressures are being passed onto customers, risking further demand erosion as consumer sentiment hits record lows amid rising gasoline prices.

Looking ahead, packaging firms must balance price adjustments with the risk of accelerating demand contraction. Strategies may include investing in logistics efficiency, diversifying into higher‑margin packaging formats, or leveraging digital tools to optimize freight routing. Investors will watch margin trends closely, as sustained cost inflation could trigger additional consolidation in an industry already grappling with overcapacity. Ultimately, the sector’s resilience will hinge on its ability to adapt supply‑chain structures while navigating geopolitical volatility and evolving consumer preferences.