When the Facts Change

Planting the trees we’ll never sit under

Arthur Grimes, senior fellow at Motu Research, joins Bernard Hickey to discuss a big shift to discount rates that could make big infrastructure projects much more viable in the future.

28 Mar 2025

When the Facts Change

More about the episode

For 30 years, a little-known number in government circles has quietly stymied investment for future generations. Set by Treasury, the ‘discount rate’ was once set at 10%, and it meant future benefits and costs were heavily devalued, becoming worth almost nothing after six or seven years. In a nutshell, higher discount rates discourage long-term investment and incentivise short-term projects. Treasury has recently reduced the discount rate to 5%, but is that enough?

Bernard Hickey talks with Arthur Grimes, senior fellow at Motu Research and professor at Victoria University, about a big shift to new discount rates that could make big future projects much more viable.