A fourth person has been charged over the murder of a man whose body was found in a shallow grave south of Brisbane.

Three men have already appeared court charged over the murder of Logan City man Michael Peter Klaassen.

The 26-year old was reported missing last month and his remains were found buried in a shallow grave at a Logan Reserve property on Friday.

Three men aged 24, 36 and 28 appeared in court on Saturday facing charges including murder, interfering with a corpse and being accessories to the fact.

All have been remanded in custody to appear in court next week and next month.

On Saturday night a 32-year-old Brisbane woman became the fourth person linked to the case.

She has been charged with being an accessory to murder and is due to appear the Beenleigh Magistrates Court on Monday.