Thursday, February 17th 2011, 7:39 PM

Mariant/APMichael Jackson, pictured in 2005, died in June 2009 from a drug overdose.

LOS ANGELES - Michael Jackson's estate keeps raking in the cash.

A new accounting of the King of Pop's posthumous empire shows executors have made a whopping $310 million since the singer's death from a drug overdose in June 2009.

The Jackson kingdom, once on the verge of collapse with $400 million owed various creditors, has been able to pay down roughly $159 million in debts and expenses, new documents first obtained by TMZ.com reveal.

The "This Is It" movie has been a huge contributor, grossing more than $261 million worldwide, according to boxofficemojo.com.

And then there are the sizable music and merchandising deals.

The behemoth estate has paid for "substantial improvements" to the famous Jackson family compound in Encino, Calif., and supports Jackson's mother and three kids.

Still, Katherine Jackson has complained publicly that the $7,000 to $8,000 cash allowance she receives each month has not been enough to cover expenses.