Honesty doesn’t hack it.

A Boston taxi cab driver is disappointed he only received a $100 reward after returning $187,000 cash lost in his car.

“I thought maybe he would give $500 or $1,000, maybe one of those bundles,” Raymond (Buzzy) MacCausland, the lucky cabbie who found the fortune told the Daily News.

MacCausland was driving a homeless man who had inherited his riches after living in a shelter for six months, the 72-year-old cabbie remembered.

After dropping him off at a hotel, MacCausland later noticed he left the bag filled with bills behind. He looked in the bag to find the man’s name — and stumbled across stacks of $50 and $100 bills.