In 2010 the average amount spent by candidates for the Auckland mayoral race was $77,727 - well above the $12,131 average spent by candidates running for mayor at other city councils. Mr Brown spent $390,761 in the last three months of the campaign, John Banks spent $554,958 and Colin Craig - now Conservative Party leader - spent $569,321. Candidates for Parliament have spending limits of $25,000 although there are spending limits of more than $2 million for political parties as well.
A spokeswoman for Local Government Minister David Carter said there were no plans to revisit the spending limits as part of changes to the donations rules for local candidates.
Spending limits
Population more than 1 million
* (Auckland City): $579,560
* Population 250,000-999,999 (eg, Wellington, Christchurch): $70,000
* Population 150,000-249,999 (eg, Hamilton): $60,000
Average campaign spending in 2010
In mayoralty contests:
* Auckland Council mayoralty (20 candidates): $77,727
* Len Brown: $390,761
* John Banks: $554,958
* Other city mayors (69): $12,131
* District mayors (171): $5850
For council seats:
* Auckland Council (101): $9631
* Other city councils: $3456
* District councils: $1160.