NBN Co chief executive Bill Morrow says the company could cut high-speed broadband plans to save costs if the Vertigan Review's broadband predictions come true.

The Vertigan Panel's cost benefit analysis used forecasts by Communications Chambers, that predicted 50 per cent of Australians would only need 15 megabits per second in 2023 and that only 0.01 per cent of households would need 48 megabits per second or more.

Telstra provides a lot of work for the NBN roll out around Australia.

NBN Co's profitability could be at risk if the predictions come true and customers avoid buying the more expensive and higher speed products.

Mr Morrow said it was up to the federal government to change the national broadband network's technologies to match the forecasts.