Tariff-Aware Pricing in Faerûn: Using Margin Adjustments to Account for City-State Tariffs

In the diverse and often fractious realms of Faerûn, trade flows not only through rivers and roadways, but also through the tangled webs of regulation spun by each city-state, province, and guild-dominated territory. These authorities often impose tariffs—whether to protect local industries, fund defensive walls, or simply fill coffers—which impact the final cost of goods traded across borders.

For the Waterdeep Trading Company and its peers, applying these surcharges manually is a recipe for...