Diesel Surges, Tariffs Spill Over: The 2026 Cost Buffer for Cross-Border Importers Has Run Out

Two Reports in 48 Hours. Both Came in Hot. What Does it Mean？ 

The Bureau of Labor Statistics, BLS dropped two inflation reports in two days. Both beat expectations. Neither told a reassuring story. 

On May 12, the Consumer Price Index (CPI) showed prices up 3.8% year-over-year (YoY). That's the fastest annual pace since May 2023. The next day, the Producer Price Index (PPI) came in even hotter. Wholesale prices jumped 1.4% for the month, the biggest single-month gain since March 2022, and 6% YoY, the highest since December 2022. 

PPI tracks wholesale prices before they reach consumers. When both CPI and PPI beat forecasts in the same week, it tells you one thing: cost pressure is stacking across the supply chain, and it hasn't finished moving downstream yet. 

Energy Shock Meets Tariff Pass-Through. Both Hit in the Same Month. 

April's inflation surge had two engines. They fired independently. They landed in the same month. 

• The first was energy. Roughly three-quarters of April's goods-side PPI increase came from one source: final demand energy prices, up 7.8%. Gasoline drove the bulk of it, surging 15.6% for the month and accounting for more than 40% of that move. CPI told the same story. Energy costs rose 17.9% year-over-year. Gasoline was up 28.4% YoY. The Iran war is pushing global oil prices higher and squeezing the Strait of Hormuz. That pressure feeds directly into freight and transportation costs across every supply chain touching the U.S. market. 

  
  

• The second was tariff pass-through. Services prices jumped 1.2% for the month, the biggest increase since March 2022. Trade services were up 2.7%. Margins for machinery and equipment wholesalers climbed 3.5%. David Russell, global head of market strategy at TradeStation, said it plainly: inflation is sticky and accelerating, and the core reading confirms a deeper structural trend, especially in services. 

One number stands out. Core PPI, food and energy stripped out, rose 1% for the month. The forecast was 0.4%. Price pressure has moved well beyond the energy sector. 

How Much Pass-Through Runway Is Left? Where Do Businesses Stand Right Now? 

On May 5, 2026, researchers at the Federal Reserve Bank of Dallas published a clear finding: tariff costs have achieved full pass-through into U.S. consumer prices. Businesses are no longer absorbing import duties. Those costs are now sitting on the consumer side. 

The numbers tell the same story. Core Personal Consumption Expenditures (PCE) inflation hit 3.2% year-over-year in March, the highest since 2023. Dallas Fed researchers attribute roughly 0.8 percentage points of that directly to tariffs. Strip out the tariff effect and core PCE would have been 2.3%. 

The realized tariff rate peaked at 10.9% in October 2025 and ended the year at 9.4%. The Dallas Fed's own economists have noted that the direct inflationary push from 2025 tariff changes peaked in February. If core goods inflation stays stubborn through April and May, tariff residuals aren't the explanation anymore. What's driving it now is spillover across supply chains, compounding on top of the energy and freight surge already in play. 

Meanwhile, April CPI showed real average hourly wages down 0.5% for the month and 0.3% YoY. Consumer purchasing power is shrinking. End markets have less room to absorb higher prices than they did six months ago. 

Pass It on or Eat It. There's No Good Answer. 

The Associated Press, AP framed it directly: sustained PPI increases are forcing businesses into a double bind. Raise prices and risk losing customers. Hold prices and watch margins compress. The problem is that businesses have already been absorbing tariff costs for over a year. That cushion is gone. 

Nationwide senior economist Ben Ayers said after the PPI release that he expects May CPI to break above 4%. That would be the highest reading since May 2023. Wholesale cost pressure is moving downstream faster than expected, and cross-border brands are running out of pricing flexibility. 

The macro environment isn't offering any help. The Fed is holding its benchmark rate between 3.5% and 3.75%. Rate cut odds for the year are near zero. After the PPI report, odds of a rate hike climbed to roughly 39%. Financing costs and inventory carrying costs aren't coming down for cross-border importers anytime soon. 

One Thing That Still Moves the Needle: Where Your Supply Chain Is Built. 

The Dallas Fed research closes a debate that many importers were still having. Tariff pass-through is complete. Business-level absorption capacity is largely exhausted. For international enterprises and cross-border e-commerce businesses and importers, cost stability now comes down to supply chain structure, not price negotiation. Diesel surcharges are up. Policy headwinds are coming from multiple directions at once. Reactive customs strategies near the border don't create buffer anymore. The businesses that are managing this environment are the ones that landed their supply chains closer to the U.S. market before the pressure arrived. 

FBD GROUPS is a full-service 3PL provider specializing in hazardous materials (Hazmat). Certified under DOT, IATA, ISO 9001, ISO 14001, and OSHA standards, FBD GROUPS operates over 900,000 square feet of warehouse space across California, Texas, and Georgia, with support teams in Taipei and Shenzhen. Services covering international freight forwarding, drayage，customs clearance, local warehousing, order fulfillment, last-mile delivery, reverse logistics, and RMA processing. 

To find out how FBD GROUPS can help your supply chain stay stable and competitive as costs keep climbing, reach out to our team.