CashFlow is an economy plugin that lets you create taxes and salaries that pay out at an interval you set. Compatible with iConomy 4, 5, & 6+, BOSEconomy 6 & 7, Essentials Economy 2.2.17+, and MultiCurrency. Permissions plugin optional but recommended - pick from PEX, bPermissions and PermissionsBukkit.

Bukkit forum page.

Requirements:

Register (Versions 1.0.1 and up use Vault)
An economy plugin - BOSEconomy, MultiCurrency, Essentials Eco, iCo4/5/6
A permissions plugin - PEX, bPermissions, PermissionsBukkit

Features:

Uses the Register API, so it is compatible with multiple economy plugins.
Supports PEX, bPermissions, and PermissionsBukkit.
Create multiple taxes with different amounts, intervals, and players receiving the tax (or no player receives the collected tax). Apply taxes to one group or many. Gives you the ability to add players to an "excepted players" list so if someone isn't going to play for a while you can freeze their tax without having to remove them from a group.
Create multiple salaries with different amounts, intervals, and players paying out the salaries (or no employer). Apply salaries to one group or many. Add players to an "Excepted Players" list so you can freeze their payment if they're going to be away, without having to remove them from a group.
Hits offline players.
Set salaries and taxes to pay only to players who have been online within a certain number of hours.
Supports non-player economy accounts.

Commands and Permissions

Tutorial

To Do:

Commands to edit taxes (maybe).
A little code cleanup.
More permission nodes
Percentage based salary

Trello Dev board

Visit the Trello board to see the current todo list for all projects.

You can comment and vote on any of the topics there.

All changes on the Trello board are in real-time.

If you decide to download this plugin please leave me a comment to let me know how it works for you so I can improve it! And if you like this plugin, please consider donating. It's a big incentive to continue this, and it helps me pay for things I need for school.