Polymarket will implement a new fee structure starting March 30, 2026, expanding its taker fee to cover additional market categories such as Finance, Politics, Economics, Culture, and Weather. Previously, fees were only applied to Crypto and Sports markets. The new fee rates will be calculated using a dynamic formula, with peak fees concentrated around a 50% probability. The highest effective rate for Crypto is approximately 1.80%, while Finance, Politics, and Tech markets will see rates around 1.00%. The platform aims to use these fees to incentivize market makers through Maker Rebates, enhancing liquidity. Fees will be priced in USDC, with transactions involving buying shares and selling in USDC. Currently, geopolitical and global events markets remain exempt from fees. Polymarket's adjustments reflect its strategy to broaden its market scope and enhance trading dynamics.