Welcome to my 2025 thread to cover the so-called "button presses" (in fact the execution of a computer routine) that distribute preferences for the Senate and determines the Senate results.
I have not had nearly as much time to work on projecting the Senate counts this election as in the past because it's been impossible to get away from the complexity and number of the in-doubt House of Reps counts for long and because of other work commitments. In particular I probably would have been able to call Tasmania if I had had the time to do a few days scrutineering (and had been able to find anyone willing to appoint me) but such things were not to be.
On this thread states/territories will appear once there are no unapportioned votes shown as awaiting data entry. Normally based on past practice the button press follows a few days after that with the declaration shortly after (in the absence of any recount request that might be caused by a micro-close margin). Until I have seen a state reach zero unapportioned votes, commentary about it continues on the previous National Senate postcount thread.
Each section on this thread will firstly include details of the count reaching zero unapportioned votes and button press timing once known. As I start this article I do not have detail of any button press times. This will be followed by a brief summary of prospects in the count, plus any late-breaking analysis of prospects, and once the result is known, the result itself with analysis of the preference flows and outcome. For this year it is expected distributions will generally appear the day after. See the 2022 button press thread for what to expect. Far more detailed discussion will be posted down the track (2022 example here).
The AEC has stated all Senate counts are expected to complete in the next two weeks with smaller states and territories ahead of larger states.
In the article below Q stands for quota. In the larger states quota is one-seventh of the votes rounded down plus one. In the Territories it is one-third rounded down plus one. Reaching quota means a candidate wins but it is also possible to win one of the final seats short of quota by being ahead when all bar six candidates have been eliminated.
In four states (NSW, Victoria, WA and SA) the contest appears to be most likely a straight fight between Labor and One Nation with One Nation likely to add to their already large collection of seventh place finishes. However in some of these they still have a chance of winning. Labor and the Greens will have an outright combined majority in the Senate. The Coalition and Greens will have a "blocking majority" (50%, not really a majority, but that's the term) if the Liberals hold their second seat in Tasmania.
New South Wales
NSW has reached zero unapportioned as of May 28.
Primary vote leaders are Labor 2.634 Q Coalition 2.061 Greens 0.783 One Nation 0.425 Legalise Cannabis 0.245 Trumpet of Patriots 0.168 Libertarian-led minor right allsorts ticket 0.130 Family First 0.113.
The first count will elect Tony Sheldon (Labor) and Andrew Bragg (Liberal) and their surpluses will elect Tim Ayres (Labor) and Jessica Collins (Liberal). At some point late in the long string of minor party exclusions Mehreen Faruqi (Greens) will get across the line and this will leave the last seat between Emilija Beljic (Labor) and Warwick Stacey (One Nation). The gap should close substantially (probably slightly more than half) but a .209 Q primary vote lead (2.99%) is too much gun and Labor will win the final seat. Even when Labor surged in late polling this one was never on my radar; how on earth did Labor get a 7.2% swing?
RESULT: 2 Coalition 2 Labor 1 Green 1 One Nation. Warwick Stacey has won the final seat.
Well I was absolutely wrong about that one, One Nation has won the final seat from 3% behind! Stacey in the end won by 0.024 Q which is reasonably comfortable. In general One Nation did better on preferences than expected off 2022 and Labor much worse. The Legalise Cannabis exclusion favouring One Nation over Labor at the end has had some attention but by that time the seat was gone even if 2022 preference flows were maintained.
One Nation did generally better across the board than 2022 on preferences from anywhere (especially the Coalition on account of their how to vote card, but the Coalition how to vote card had little impact since their surplus was tiny). However the decisive factor compared to 2022 was the preferences coming from the Libertarian/GRPF/HEART ticket. In every state besides NSW the Libertarian ticket failed compared to the 2022 Liberal Democrats, shedding between 54% and 77% of their 2022 vote, but in NSW this joint ticket held 88% of its previous vote and its preferences shifted overwhelmingly to One Nation in spite of Craig Kelly's fights with one of his former parties. The value of the preference shift from Liberal Democrats to Libertarian/Rennick/HEART was itself .077 quotas in terms of the gap between Labor and One Nation, more than three times the margin. In 2022 the three-way split ALP/Green/ON off Lib Dems was 32.8-16.5-29.6 and in 2025 off the Libertarian-headed ticket it was 6.8-6.6-75.0.
Victoria
The count reached zero unapportioned votes on 26 May - 23 days is very fast for a large state. The button press will occur on the morning of 28 May 9:30 am.
Primary vote leaders are Labor 2.427 Q Coalition 2.199 Greens 0.872 One Nation 0.311 Legalise Cannabis 0.254 ToP 0.177 Family First 0.127 Animal Justice 0.110 Vic Socialists 0.108.
Raffaele Ciccone (Labor) and James Patterson (Liberal) will be elected on primaries. Their surpluses will elect Jess Walsh (Labor) and Jane Hume (Liberal). Eventually Steph Hodgins-May (Green) will cross on minor party preferences, leaving what looks like a race between Labor's Michelle Ananda-Rajah and One Nation's Warren Pickering for the final seat. The gap in Labor's favour starts at a large 2.31%. The argument that One Nation can at least make some inroads is that the left preferences are split between Labor and the Greens until the Greens get quota, while once the Coalition are eliminated One Nation are on their own. However it doesn't seem like this difference will be enough. There have been thoughts that either the Coalition or Legalise Cannabis (Fiona Patten) might get over One Nation but this seems very unlikely, and it wouldn't be enough for either to win anyway.
Tuesday night: We'll know soon enough! I have been looking at the SA distribution where, on a 2CP gap basis, Liberal preferences are 46 points more favourable to One Nation vs Labor than in 2022 (when they were actually more favourable to Labor), a split that handily exceeds the 26% of Liberal ATV voters who followed the Coalition how to vote card. Trumpet of Patriots are 13 points less favourable, Sustainable Australia is 17 points more favourable and other changes are minor. If similar shifts apply in Victoria, and also considering primary votes, things could be about 0.023 Q closer than the PB model, so it's not impossible for One Nation to get this, but they're still underdogs.
RESULT: 3 Labor 2 Liberal 1 Green. Ananda-Rajah has landed on her feet, winning what must have seemed like just a consolation prize run after Higgins was abolished.
The final margin was 0.055 quotas, pretty much as expected. Of interest is that Labor dropped behind and were pushed over One Nation by the Legalise Cannabis exclusion. Fiona Patten was nowhere near winning, over 100000 behind at exclusion. More comments later (out on fieldwork!)
Queensland
Qld has reached zero unapportioned as of May 28. Button press is 3:30 on May 29th.
Primary vote leaders are LNP 2.165 Labor 2.134 Green 0.733 One Nation 0.499 Gerard Rennick People First 0.329 Trumpet of Patriots 0.256 Legalise Cannabis 0.246 Family First 0.126 JLN 0.119
Paul Scarr (LNP) and Nita Green (ALP) will be elected on primaries and their surpluses will elect Susan McDonald (LNP) and Corinne Mulholland (ALP). A long series of exclusions will eventually elect in some order Larissa Waters (Green) and Malcolm Roberts (ON). Waters may or may not get quota while Roberts shouldn't because Rennick will not be excluded. Despite Rennick's impressive result I've never seen any reason to believe he could chase down a gap of 2.4% vs One Nation who generally perform well on preferences.
RESULT: 2 Labor 2 LNP 1 Green 1 One Nation as expected
Malcolm Roberts actually did well enough to cross quota on the final exclusion! He beat Rennick extremely easily by 0.458 Q continuing One Nation's record of doing very well on preferences in Queensland.
Western Australia
WA has reached zero unapportioned as of May 28. Button press is 1:00 pm (3:00 eastern) on May 29th.
Primary vote leaders are Labor 2.532 Q Liberal 1.863 Greens 0.894 One Nation 0.411 Legalise Cannabis 0.282 Nationals 0.252 Aus Christians 0.187 Trumpet of Patriots 0.117 Gerard Rennick People First 0.104.
Ellie Whiteaker (ALP) and Slade Brockman (Lib) will be elected on primaries with Whiteaker's surplus electing Varun Ghosh (ALP). At some point in the string of minor candidate exclusions both Matt O'Sullivan (Lib) and Jordon Steele-John (Grn) will cross and it is then a question of whether Tyron Whitten (One Nation) can catch Deep Singh (ALP) from .121 Q (1.73%) behind. It looks likely One Nation will gain here as there is .768 Q of preferences that are likely to be right-wing vs .500 that break left. However, Senate preferences break relatively weakly compared to Reps preferences, and also the Greens are .031 Q closer to quota than the Liberals, so it's challenging for One Nation to quite bridge .121 Q, though it could well be very close.
I made a rough attempt at modelling this count using a range of Senate preference flows including from past WA elections and SA 2025 (to put some of the new parties in the mix) and in my model a fairly favourable scenario for One Nation occurred - Liberals were elected on Nationals preferences with a substantial surplus (around .17 Q). In this case the finish was very similar to Victoria with One Nation passing Labor but then being repassed on the Legalise Cannabis surplus, I had a margin of 0.046 Q at the end. This is slightly less close than the Poll Bludger version but I think that in the PB model the batching of Liberals and Nationals gives One Nation an advantage. The roughness of mine may mean that it makes other errors. Anyway it is certainly close enough that if One Nation does better on preferences across the board than expected they could win. Something to note from the SA count is that Australia's Voice preferences are very favourable to the Greens, which if repeated (and I think it will be) will put the Greens over quota substantially before the Liberals.
Thursday: I reran this model using purely WA 2019 Nats preference flows (raising the Liberal surplus to .20 Q) and Labor still won but only by 0.030 Q which is very close. If the Liberals can cross quota before the Nationals are excluded that might be an advantage to One Nation, however I think this won't happen. Another thing that could well help them is if the Nationals flow is stronger to One Nation and weaker to Liberals, which is possible. I note that the Poll Bludger model as of today predicts a One Nation win.
Thursday 3:20 One Nation wins the distribution! RESULT 2 Labor 2 Liberal 1 Green 1 One Nation
Whitten has won reasonably comfortably in the end by 0.036 quotas. Looking through the distribution one thing that has happened here is that the Australian Christians exclusion was far more favourable to One Nation relative to Labor than in 2022, with One Nation doing about 21 points better than Labor cf about 8 points better on purely Christians preferences, but this seems to also flow through to parties feeding into Christians before their exclusion. Gerard Rennick People First preferences flowed extremely strongly to One Nation - not all instantly but further down the line.
South Australia
The count reached zero unapportioned votes on or about 23 May. The SA declaration has been scheduled for 3 pm 27 May. The button press is at a similar time on the 26th.
Primary vote leaders are Labor 2.664 Q, Liberals 1.930 Greens 0.903 One Nation 0.374 Legalise Cannabis 0.200 Trumpet of Patriots 0.199 Jacqui Lambie Network (Rex Patrick) 0.190 Family First 0.142.
The button press will elect Marielle Smith (Labor) and Alex Antic (Liberal as of 6:18 pm 25 May 2025) and Smith's surplus will elect Karen Grogan (Labor). A long series of minor candidate and party exclusions will eventually see Anne Ruston (Liberal) and Sarah Hanson-Young (Green) cross quota leaving Charlotte Walker (Labor) with a large lead over Jennifer Game (One Nation on the ballot papers but has since quit the party) for the final seat. There is no reason whatsoever to believe Game can gain 0.29 Q (4.1%) out of what will only be an available 0.963 Q after excluding the preferences soaked by the Liberals and Greens, especially with preferences exhausting, though it's fairly likely the gap will reduce modestly.
RESULT: 3 Labor 2 Liberal 1 Green as expected.
The distribution has finished up somewhat closer than the Poll Bludger model with Labor winning 1.002 Q to 0.803 Q with 0.009 Q not distributed. That means the gap was 0.199 Q compared to the model's 0.246 Q. However of this difference of 0.047 Q, 0.029 Q is explained by changes in the relative primary votes of Labor and One Nation meaning the model was actually very close when done, overestimating Labor's margin by less than 0.02 Q. There is a suggestion here that exhaust may have gone down. Direct comparisons with the PB model are made difficult by Legalise Cannabis passing Trumpet of Patriots for eighth position, but before these exclusions Labor are about where they would be expected to be given the primary vote changes while One Nation are about 0.04 Q better. One place this seems to have come from is that One Nation did well off the preferences of Rex Patrick (JLN) gaining 0.06 Q compared to the model's 0.034 Q - this alone accounts for the small difference in the margin after considering primary votes. One Nation also have a somewhat larger than expected share of the small Coalition surplus.
Tasmania
The count reached zero unapportioned votes on or about 23 May. The button press which I intended in person after half-running from Mt Stuart to the AEC in 19 minutes was at 10:30 am Tuesday 27 May.
This is the most complex of the counts - one where the winners are predictable if past preferencing patterns are followed but there are many reasons for caution re whether they will be. It's a major shock that the Liberal vote in Tasmania has been so awful that their second seat is even button pending. Primary vote leaders are Labor 2.466 Q Liberal 1.648 Greens 1.141 Jacqui Lambie Network 0.509 One Nation 0.362 Legalise Cannabis 0.238 Trumpet of Patriots 0.227 Shooters Fishers + Farmers 0.159
The button press will immediately elect Carol Brown (Labor), Claire Chandler (Liberal) and Nick McKim (Green) and Brown's surplus will elect new Labor Senator Richard Dowling. This then turns into a three-way fight for two seats between Richard Colbeck (Liberal), Jacqui Lambie (JLN) and Bailey Falls (Labor). Lee Hanson (ON) is 2.1% behind Lambie and 1.4% behind Labor and doesn't seem to be a realistic threat - an outside chance perhaps of spoiling one of the three, but even if doing so would not seem likely to win.
Modelling based off the assumption that 2022 Senate preference flows will be maintained suggests that Lambie leads Colbeck leads Falls for the final seat, but the projected margins are tight enough that given the backdrop of their weak performances on primary votes it's possible at least one of Lambie and Colbeck will be beaten by Falls. On the other hand Colbeck could plausibly benefit from stronger flows from One Nation, and flows to Lambie may well be stronger below the line than in 2022 when the then (and still) much less well known Tammy Tyrrell was their lead candidate. So it will be an impressive feat if Labor pulls it off. William Bowe's model had Lambie finishing with 1.001 Q Colbeck 0.922 Q Falls 0.874 Q on its latest run. My own has 0.989 Q/0.922 Q/0.860 Q. I should stress these models are not predictions - they rely on an assumption that we both know could be wrong - but they show that a substantial preference shift is needed for Falls to win, especially at the expense of Lambie. I am not particularly convinced by a common argument that Lambie will lose specifically because of right-wing voters supporting salmon farming as I don't think minor right voters in Tasmania care that much about it. Whether the fighting between One Nation and JLN has succeeded in convincing ON voters that Lambie is too left generally is another matter.
If Labor does win it's possible it could be very close, and will be interesting to see the distributions in any case.
Tuesday 10:30 Here we go... Watching at AEC
Lambie and Colbeck win 5 and 6.
RESULT: 2 Labor 2 Liberal 1 Green 1 JLN.
The distribution has finished much less close than expected with both Lambie and Colbeck crossing quota on the One Nation exclusion to win with 1.046 and 1.014 Q to Labor's 0.799 Q. The major cause of the blowout compared to 2022 preference flows is that the One Nation exclusion three-way split was way more polarised between the major parties. Lambie (38.7% of the One Nation split) was slightly higher than expected but Colbeck got 37.3% (about 22% projected) and Falls only 11.7% (about 19% projected). This was mostly not caused by increased following of the One Nation how to vote card (which had the Liberals at 6) - the follow rate increased only from 2.4% to 4.1%, though the Liberals were left off in 2022 so that 4.1% is effectively for nothing. The how to vote card accounts for about one sixth of the total rise in the Liberals' share of the One Nation votes on a Lambie/Labor/Liberal split, close to half being accounted for by One Nation voters choosing themselves to put the Liberals 2.
Australian Capital Territory
ACT reached zero unapportioned votes on May 26. The button press will occur mid-morning on 28 May.
David Pocock's ticket has a massive 1.175 quotas and Labor's has 0.952 with the Liberals on a dismal 0.533. It's quite likely (based off 2022 prefs almost certain in the absence of Kim Rubenstein) that Katy Gallagher will get the 31.5% of Pocock's surplus she needs to cross quota and that will be the end of the count! If not Gallagher will soon get there anyway off minor candidate preferences.
RESULT: 1 Pocock 1 Labor.
Bzzzt! Silly mistake; I forgot of course that Pocock has a running mate whose surplus would sit with until they were excluded rather than flowing straight to Labor. In fact after the exclusion of all the other second candidates, and the lead Sustainable Australia, HEART and Animal Justice candidates, it was the exclusion of Pocock's running mate that put Labor across the line by 46378 votes (.474 quotas) with the Greens still holding .317 quotas that would have also flowed strongly to Labor.
I have calculated Senate 2CPs (excluding exhaust) and get that Pocock won the Senate 2CP vs the Liberals 75.6-24.4, and Labor beat the Liberals 72.3-27.2 with Pocock beating Labor 60.0-40.0. What the first two mean is that the Liberal performance was so terrible that even had either Pocock or Labor not run, the Liberals still would not have recovered their seat! The Liberals even lost the 2CP vs Animal Justice Party (50.06-49.94) and may well have lost it vs Sustainable Australia too (50.6-49.4 to Liberal) if the Senate had compulsory full preferencing.
There has been speculation about what the result would have been with four Senators and whether the Liberals would have even won then. This requires detailed simulation, noting that there is a large BTL leak off David Pocock to other candidates.
Northern Territory
I do not know exactly when the count reached zero unapportioned votes but I first noted it had done so on May 21. The NT declaration has been scheduled for 11 am 28 May so I expect the button press is around 24 hours before (and was).
After some interest caused by dumped CLP Senator Sam McMahon's run for the Liberal Democrats in 2022, the NT Senate has returned to normal. Labor (1.049 quotas) has overtaken the CLP (0.982 Q) during the postcount and the button when pressed will re-elect Senator Malandirri McCarthy with a small surplus. This will be followed by a number of exclusions of support candidates and at some point - probably a few exclusions into the lead minor party candidates - Jacinta Nampijinpa Price will have racked up the 814 preferences she needs to get across the line. The Greens (0.332 Q) will finish a very distant third.
RESULT: 1 Labor 1 CLP
Amusingly Price crossed the line on preferences from Labor's #2 candidate (these were mostly second preferences from McCarthy's surplus). Eliminated prior to that point were all the other #2 candidates, the lead Australian Citizens candidate and the ungrouped independent Kenny Ong (who actually did rather well).