15 April 2026
Nigel Gray
[FYI request #34162 email]
Dear Nigel
Thank you for your Official Information Act 1982 (OIA) request, received on 19 March
2026. You requested:
Al internal emails, briefings, memos, notes, reports, or discussions produced by
Treasury, the Ministry of Finance, or the Minister’s Office that refer to, model,
estimate, or discuss the impact on GST revenue resulting from recent increases
in retail fuel prices, including but not limited to petrol (91, 95, 98) and diesel.
Any internal analysis, forecasts, or revenue model ing that quantify the GST
revenue change associated with fuel price movements during the period 1
February 2024 to the present.
Any discussions or correspondence (internal or between agencies) regarding the
fiscal implications, al ocation, or treatment of additional GST revenue arising from
fuel price increases during the same period.
Any advice provided to Ministers relating to the GST revenue effects of rising fuel
prices, including whether such revenue changes were considered material for
fiscal planning or budget processes.
I do not hold specific information of the sort you refer to in the time period relevant to
your request. Therefore, your request is refused under section 18(e) of the OIA, as the
document al eged to contain the information requested does not exist or, despite
reasonable efforts to locate it, cannot be found.
Officials have however advised me that the overal fiscal impact is highly uncertain as
any lift in tax from higher fuel prices may be offset by lower economic activity and
higher costs to Government. This is because higher fuel prices can have offsetting
effects on taxes, as higher inflation may lift taxes while lower economic activity
dampens the tax take.
In terms of GST specifical y, it is unclear how much fuel sales wil be impacted by higher
prices, and total GST revenue may decrease regardless of if households spend less
elsewhere.
The Treasury wil continue to update their forecast scenarios considering the developing
situation in the Middle East.

This reply addresses the information you requested. Under section 28(3) of the OIA,
you have the right to ask the Ombudsman to review any decisions made under this
request. The Ombudsman may be contacted by email at:
[email address] or by cal ing 0800 802 602.
Yours sincerely
Hon Nicola Wil is
Minister of Finance