According to the Northern Ireland Audit Office, Northern Ireland has spent more than £2 billion (€2.25 billion) in response to Covid-19.
It added that it would be much higher in the coming months as disruption continues.
These costs exclude the furlough scheme in operation in Northern Ireland.
The majority of the costs were incurred by the finance, health and economy departments.
By August 2020, 84 initiatives by Stormont departments since March cost £1.74 billion.
The estimated cost of other national schemes that apply to Northern Ireland was £465 million.
These schemes included support for the self-employed and increases in welfare payments.