Jermaine Dupri is tax free after he recently paid off a giant lien, but it cost him nearly twice as much as it should have.

According to docs filed recently in Georgia, Dupri owed $493,818.75 in back taxes he failed to pay for the year 2007. But the principal was only $254,782.64.

Here's what the state tacked on:

Interest — $91,721.75
Penalty — $64,969.57
Collection fee — $82,294.79
Costs — $50 (why bother?)
 

Lesson learned: Pay your taxes on time!!!