A Brooklyn woman poured gasoline on her 73-year-old neighbor and lit him on fire Sunday after he refused to hand over money he owed her, authorities said.

Denise Wylie, 62, allegedly erupted in a rage when she went downstairs to collect the debt from her former pal and he said he would pay her the next day, according to cops.

Wylie then threw gasoline on his face and back and set him ablaze inside the Chester Street apartment building in Brownsville around 5 p.m., court documents state.

The victim was taken by EMTs to the burn center in Staten Island Hospital in critical condition with second- and third-degree burns.

The nature of the debt was unclear, the NYPD said.

Wylie was arrested Monday and slapped with a slew of charges including attempted murder, assault, menacing, and criminal possession of a weapon.

She pleaded not guilty to the charges at her Brooklyn Criminal Court arraignment Tuesday morning.

Brooklyn judge Keshia Espinal set bail at $500,000.

Wylie was previously collared in 2016 and 2017 for drug charges, court records show.