Key dates for the Tāmaki Makaurau by-election.
| TĀMAKI MAKAURAU BY-ELECTION TIMETABLE | |
| Wednesday 9 July | Tāmaki Makaurau electorate notice of vacancy published |
| Thursday 10 July | Start of the regulated period for election advertising expenses |
| Monday 14 July | By-election dates announced |
| Wednesday 30 July | Writ Day Governor-General issues writ directing the Electoral Commission to hold the Tāmaki Makaurau by-election |
| Thursday 31 July | Telephone dictation registration starts |
| Tuesday 5 August - noon | Nominations close for candidates in the Tāmaki Makaurau by-election |
| Tuesday 5 August - afternoon | Tāmaki Makaurau by-election candidates announced by the Electoral Commission |
| Wednesday 20 August | Overseas voting starts Telephone dictation voting starts |
| Monday 25 August | Advance voting starts |
| Friday 5 September | All political advertising ceases and election signs taken down by midnight |
| Saturday 6 September | Election day for Tāmaki Makaurau by-election Voting places open from 9am to 7pm |
| Saturday 6 September | Preliminary Results progressively available from 7pm on www.electionresults.govt.nz Targets for release are: - by 9.00pm results from 50% of voting places - by 10.30pm results from 95% of voting places These are targets not guarantees. |
| Wednesday 17 September | Official Results declared (including special declaration and overseas votes) |
| Monday 22 September | Deadline for applications for judicial recount |
| Tuesday 23 September | Return of Writ by Electoral Commission naming successful candidate (presuming no recount) |
| Monday 15 September | Deadline for candidate election expenses and donations to Electoral Commission |