Yes, there is a withdrawal tax for converting unlocked Honey to $HXD tokens. The tax amount ranges from 10% to 30% based on the player's activity in the Honeyland economy.  Your VIP level will determine the exact tax.

New players start with a 30% tax but can reduce it by interacting with in-game transactions, using the marketplace, Breeding, etc. 

Player's VIP level also determines how often they can withdraw Honey.

The tax collected is allocated to game development, player rewards, and burned tokens.

NOTE: To see your tax-free and taxable balances as well as your current withdrawl tax percentage, visit the in-game Bank (via the main menu) and then tap Withdraw.