DeathCost

This plugin will take away a configured amount of money from players when they die.
Whole numbers and percentage amounts are supported.
A configurable death message can be sent to the player. The %s is a placeholder for the cost.

Depends on Vault to hook into economy plugins.

To allow players to bypass the cost, grant them the permission "deathcost.exempt".

Costs-per-group can be defined as so:

groups:
  default: # Group name
    cost: 20
    is-percent: true
  moderator:
    cost: 15
    is-percent: true

The least expensive option will be used if a player is part of multiple configured groups.