The Royal Commission into aged care quality and safety will hold five days of public hearings in Hobart from Monday.
The commission will inquire into operations and governance arrangements at Glenara Lakes Apartments at Youngtown and Yaraandoo Hostel at Somerset, owned by Southern Cross Care, and Bupa Aged Care's South Hobart facility.
Each of these facilities failed to meet 44 expected outcomes for accreditation last year in an audit by the Aged Care Quality and Safety Commission.
Bupa's South Hobart facility only met 28 of the standards.
The auditors found Yaraandoo Hostel did not have an effective system to ensure staff were sufficiently skilled to deliver services set to accreditation standards.
They said almost half of the care recipients interviewed provided negative feedback.
"The organisation cannot demonstrate it actively pursues continuous improvement in relation to health and personal care," they said.
"The service could not demonstrate that all care recipients are as free as possible from pain.
"While care recipients' nutrition and hydration requirements, preferences, allergies and special needs are identified and assessed on entry, management cannot demonstrate that care recipients' ongoing needs are monitored and reassessed."
An audit of Glenara Lakes found four standards were not met which meant the safety, health or wellbeing of care recipients were placed at serious risk.
The Royal Commission is scheduled to release its final report from the inquiry in 12 months.