The national broadband network could save households thousands of dollars by the end of the decade through better productivity, cheaper communication and reduced travel costs.

A Deloitte Access Economics analysis for the government says the average household would get $3800 in benefits a year by 2020 through using the NBN.

It quantifies the savings, in 2013 dollars, for communications, e-commerce, online entertainment services, travel savings, employment by teleworkers and productivity.

"Added together, these estimates suggest very significant household benefits from broadband," the report, posted on the broadband department website, states.

But it notes its estimates don't take into account the costs of broadband or equipment like modems and computers.

It cautions the report is not a cost-benefit analysis of high-speed broadband.