Research Briefing
09 May 2025

Best- and worst-case global outcomes from US tariff policy

An analysis of the best- and worst-case global growth scenarios in response to shifting US trade policies, highlighting the economic impact of tariffs on investment, trade, inflation and employment across key economies.

In response to the fast-moving and highly uncertain tariff environment, our best- and worst-case tariff scenarios seek to provide a plausible range of growth outcomes for the global economy from further shifts in US trade policy. 

The worst-case scenario sees significantly weaker growth than in our baseline, but the upsides to growth for many countries in our best-case scenario are modest at best, especially when compared with our pre-‘liberation day’ views.

Our worst-case tariff scenario

  • In our worst-case scenario, the Trump administration pushes ahead with higher country-specific reciprocal tariffs, which hit demand and unleash supply chain stress in the US and beyond.
  • Unlike in our baseline, which assumes a modest hit to employment growth, our worst-case scenario sees advanced economy job losses increase significantly, hitting consumer spending.
  • In contrast to our baseline forecast, where tariff hikes act as a disinflationary shock outside the US, our worst-case scenario assumes that retaliatory tariffs and supply chain disruption inhibit supply outside the US, too.

Our best-case tariff scenario

  • In our best-case scenario, we assume that 10% tariffs remain in place across much of the world, albeit with further exemptions and the removal of some of the universal sector-specific tariffs.


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