I will try to mention some articles that worth to read and this will give you all of answer regarding your question.
https://medium.com/bcterminal/how-blockchain-cuts-costs-for-financial-institutions-808e419cd947\
https://www.pwc.com/m1/en/media-centre/articles/blockchain-new-tool-to-cut-costs.html
https://www.business.com/articles/how-blockchain-can-cut-wasted-costs/
They are all reliable links and they can be trusted. It's about to cut the maintenance cost by used the tradiitonal economic system. you can search more interesting article on internet.