There are around 59,000 households currently supported by the payment.
In an opening statement to the Housing Committee, housing charity Threshold said that many tenants are struggling to pay rent even with the support of HAP.
The organisation s Chief Executive, John-Mark McCafferty, told members that tenants are paying top-ups to their landlord to meet rent.
This is rent paid directly by the tenant to the landlord in addition to the rent the landlord receives from HAP.
He pointed out that many tenants are struggling to find a landlord to accept HAP.
Mr McCafferty said that Threshold had carried out research into this issue in 2019 and surveyed 116 tenants eligible for HAP.