How Dues are Determined2014.11.17membertip-stamp

Sometimes dues are set at a flat dollar amount. If your union uses this approach, then you and all your co-workers pay the identical amount in dues, regardless of the fact that your earnings vary by quite a bit. Rather than setting dues at a dollar amount, some unions establish dues as a percentage of salary. When this method is used, everyone in the bargaining unit pays dues based on the same percentage. Your union may use a variation, with the amount of union dues determined by brackets of earnings. 

Adapted from The Union Member's Complete Guide, by Michael Mauer