Allen Iverson -- Buried in Bills ... But Still Drives a Maybach

Former NBA star Allen Iverson is digging himself into a giant financial hole -- with monthly bills that largely outweigh his monthly income -- but the good news is ... he's still got his fancy-schmancy Maybach.

Allen recently filed docs in GA court as part of his nasty divorce battle with his ex Tawanna Iverson which outline his dire financial situation.

According to docs, Allen brings in $62,500 in monthly income, but his expenses are FAR, FAR, greater ... costing him a cool $358,376.66 PER MONTH!!!!

So where does all his money go?

A large chunk -- $125,749.33 to be exact -- is spent paying off various creditors (like his jeweler) ... and some goes to his mortgages (but not for long, since his ATL crib is about to be auctioned off).

But Allen says he blows a lot on OTHER expenses too ... like $10,000/month on clothes, $10,000/month on grocery/house items, $1,000/month on dry cleaning, $5,000/month on entertainment, $5,000/month on restaurants ... and so on.

All in all, Iverson -- who reportedly made over $150 MILLION during his NBA career -- says he ends up in the hole each month to tune of $295,876.66. Ouch.

Despite the mounting debt though, he's still got his Maybach (which is fully paid off) ... and reportedly worth between $340k - $400k.