Eftpos transaction services in Christchurch remain affected, following Tuesday's strong earthquake, while services elsewhere have been restored.
Paymark says the earthquake resulted in an overload on the Eftpos communication network, which caused delays to services across the country.
It says services in Christchurch are affected because of power and equipment issues.
Kiwibank says its branches and ATMs in the central city are closed and unlikely to reopen before the weekend.
But a spokesperson says branch services outside of the CBD are operating.