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Question: will a regular weekly Roy Morgan ALP‑vs‑One Nation two‑party‑preferred (2PP) result show One Nation ≥50.0 before 12 Aug 2026? The resolution depends strictly on a Roy Morgan regular weekly release, and the latest qualifying series (through 9 Jun) has One Nation stuck at about 46.0–46.5 2PP despite a large One Nation primary‑vote surge. Forecasters agree the primary surge is real (corroborated by other firms and a Roy Morgan snap SMS poll that hit 49 but is excluded) but that preference‑allocation methodology and pollster headline rules are crucial — a methodology change or unusually large preference swings would be required to translate primary strength into a published 50+ 2PP. Given only ~8–9 weekly opportunities before the cutoff and the recent “stickiness” of the 2PP series, teams place the probability in the mid‑20% range (roughly 22–28%), with conditional timing skewed toward mid/late July or early August if it happens. Small differences among forecasters are mainly about how much weight to give the excluded snap poll and the plausibility/timing of a methodological shift; otherwise the assessments are broadly consistent.
Forecast: Probability distribution:
Team forecasts diverge mainly on (i) how “sticky” the ALP-vs-One Nation 2PP is given preference flows, and (ii) how much weight to give to polling noise / a potential methodology tweak. The strongest concrete evidence cited is that the regular weekly releases through 2026-06-09 have repeatedly shown One Nation at 46.5% on this matchup (ALP 53.5–ON 46.5), despite substantial primary-vote movement. That suggests either (a) genuine stability in ALP-vs-ON head-to-head preferences, or (b) changes so far have mostly been within blocs whose ALP-vs-ON preference split is already very lopsided, yielding <0.5pp net movement after rounding.
Given One Nation needs +3.5pp to reach 50.0%, and there are only ~8 weekly opportunities before the 2026-08-12T12:00Z cutoff, I think Forecaster 1’s >50% in-window probability is too optimistic relative to the observed stickiness and the structural preference-flow argument. However, I also think “very low” (≈10–15%) is a bit pessimistic because (i) a single-week threshold crossing can occur via sampling variation and (ii) continued political volatility could plausibly shift ALP-vs-ON preferences somewhat.
Net: I center around ~30% probability that a qualifying weekly release shows One Nation ≥50.0% by the deadline, and ~70% that it does not (resolving to the open-after tail). This implies the 40th percentile and above should be placed strictly past the upper bound to honestly encode the open-tail mass.
An amateur forecast is likely to (a) extrapolate One Nation’s primary-vote surge directly into an imminent ALP-vs-ON 2PP crossover, or (b) ignore the substantial probability of “no qualifying weekly ≥50% reading by the deadline.” This forecast instead anchors on the specific series relevant to resolution (the weekly ALP-vs-One Nation 2PP), acknowledges the size of the required move (+3.5pp) and limited remaining releases, and explicitly represents the large open-after probability by placing most upper percentiles strictly beyond 2026-08-12.
Forecast rationale (numeric):
— Iteration 1 — Overall, the forecasts converge on a similar picture:
The collective judgment is that a pre-12 August 2026 crossing is possible but not the most likely outcome. The probability is generally treated as minority-to-moderate rather than dominant, with estimates roughly in the 20–34% range.
The main difference is not about whether One Nation has momentum, but how far that momentum can carry:
If the threshold is reached on time, the most likely window is late July to early August 2026. If not, the center of the distribution shifts to after the deadline, with some estimates placing the first crossing around late September 2026 and a long tail extending into Q4 2026 or later.
— Iteration 2 — Across the forecasts, the reasoning is broadly consistent:
The collective view is that One Nation’s path to 50.0% is plausible but not the base case by 12 August 2026. The most likely scenario is that the threshold is reached after the deadline, unless the current momentum continues strongly enough to produce an early weekly release above 50%.
— Iteration 3 — Across the forecasts, the main reasoning is that Roy Morgan’s ALP-vs-One Nation 2PP is starting from a relatively high but still sub-threshold level of 46.5% for One Nation, so the remaining gap to 50.0% is only about 3.5 points. That makes a near-term crossing plausible, but not the default expectation.
The collective view is that One Nation is close enough to make a crossing conceivable, but the forecasts treat a pre-12 August 2026 hit as a minority outcome. If it happens soon, it would most likely be on one of the next scheduled Roy Morgan weekly releases; otherwise, the more likely path is that the threshold is reached later, or not at all if the surge fades.
Summary of Forecaster Reasoning
The Structural Preference Barrier Forecasters broadly agree that One Nation faces a severe structural hurdle to close the remaining gap in the Two-Party Preferred (2PP) metric. Australia’s preferential voting mechanics mean that One Nation’s recent primary vote surge—which heavily cannibalizes the remaining conservative Liberal-National (L-NP) base—yields diminishing returns. Because right-wing voters generally already preference One Nation, absorbing them does not significantly move the 2PP dial. To reach the threshold, One Nation would need to win over center-left voters, Greens, or moderate L-NP voters, demographics that overwhelmingly direct their preferences back to Labor, creating a formidable electoral ceiling. Additionally, forecasters note that populist surges historically peak quickly before regressing to the mean.
Polling Volatility as the Primary Pathway Despite the structural barriers, forecasters identify statistical variance as the most viable path to a positive resolution. Because the ALP-vs-One Nation matchup lacks historical election data, Roy Morgan relies on respondent-allocated preferences. This methodology introduces high week-to-week volatility. Forecasters note that if One Nation’s true underlying support naturally creeps up slightly, the inherent statistical noise across the remaining scheduled weekly polls could easily produce a temporary outlier result that crosses the threshold without a permanent political realignment.
Economic Catalysts Forecasters highlight several upcoming economic flashpoints that could fuel anti-incumbent sentiment and edge One Nation closer to the margin of error. Scheduled Reserve Bank of Australia (RBA) cash rate decisions and critical CPI inflation data releases are viewed as vital catalysts. Sticky inflation and worsening cost-of-living pressures could trigger further protest votes against the Albanese government.
Overall Consensus The rationales synthesize around a common conclusion: a fundamental, sustained realignment to cross the threshold before the deadline is highly unlikely due to the strict arithmetic of preference flows. However, the combination of highly sensitive economic data drops and the known volatility of Roy Morgan’s polling methodology leaves a credible, though minority, possibility of an outlier poll crossing the mark before the resolution date.
Question: On what date on or before 12 August 2026 will the Roy Morgan ALP-vs-One Nation 2PP first show One Nation at or above 50.0% Final Prediction: Probability distribution:
Total Cost: extra_metadata_in_explanation is disabled Time Spent: extra_metadata_in_explanation is disabled LLMs: extra_metadata_in_explanation is disabled Bot Name: extra_metadata_in_explanation is disabled
Forecaster 1: Probability distribution:
Forecaster 2: Probability distribution:
The research summarizes Roy Morgan’s June 1–7, 2026 regular weekly poll showing ALP 53.5% vs One Nation 46.5% in an ALP‑vs‑One Nation 2PP (One Nation thus needing ~3.5 points to reach 50.0%), and a record One Nation primary vote of 29.5% that has surged since the May 12, 2026 Federal Budget. It documents the week-by-week Roy Morgan trajectory from mid‑May into June (noting a May 13–14 special SMS snap poll of ALP 51 vs One Nation 49 that is excluded from the regular series), and identifies key drivers of the surge (budget backlash on negative gearing/Cgt, cost‑of‑living concerns, energy/geo‑political pressures, falling government confidence) alongside party fundraising and media attention.
The research places the surge in historical and volatility context (One Nation’s previous peaks, low 2025 federal vote, prior rapid falls after negative press), notes there is no historical precedent for One Nation reaching 50% 2PP against Labor, and flags major uncertainties (sustainability, major‑party responses, news cycles, ceiling effects). It also states prediction markets are effectively unavailable in Australia (ACMA bans, Polymarket not operating) and that, with the question cutoff of 12 August 2026, roughly 8–9 more weekly Roy Morgan polls could be published; the bottom line: One Nation needs +3.5 2PP points from the current Roy Morgan reading, recent polling appears to have plateaued, and a 50% 2PP result would be unprecedented.
Sources used (as cited in the research):
Based on my research, here’s a comprehensive rundown to assist with forecasting on this Metaculus question:
As of June 15, 2026, the most recent Roy Morgan regular weekly poll (conducted June 1-7, 2026) shows the ALP-versus-One Nation two-party-preferred at ALP 53.5% to One Nation 46.5% [1][11]. This means One Nation would need to gain approximately 3.5 percentage points to reach the 50.0% threshold.
One Nation’s primary vote has surged to a record 29.5%, surpassing both the ALP (26%) and the L-NP Coalition (17.5%) for the first time [1][4][11].
The surge began following the Federal Budget announcement on May 12, 2026. Here’s the progression of the ALP vs One Nation 2PP in Roy Morgan’s regular weekly polls:
Important note: A special SMS snap poll on May 13-14 showed ALP 51% vs One Nation 49%, but this was NOT part of the regular weekly series and therefore would not qualify for this question’s resolution [background info][5].
One Nation has demonstrated significant volatility even during this surge:
Concerning signals for continued momentum:
Factors supporting continued momentum:
Critical finding: Prediction markets are currently BANNED in Australia [12]. Polymarket is explicitly prohibited by the Australian Communications and Media Authority (ACMA). There are no active, legally-operating Australian prediction markets, so no prediction market data is available for this question. There is discussion of potentially launching regulated markets (FEX Global proposal), but none are operational as of June 2026 [12].
To reach 50% in the ALP vs One Nation 2PP, One Nation needs to gain another 3.5 percentage points from its current 46.5%. While the party has demonstrated rapid growth since May 12, the momentum appears to have plateaued in recent weeks. This would be an unprecedented result with no historical parallel. Base rates suggest caution: populist parties in Australia have historically surged but struggled to sustain peaks, and One Nation has never come close to 50% in a 2PP measure before. The lack of prediction market data means there is no market-based probability to reference.
Conditioning on non-annulment.
I think the critic’s core point is right: my earlier forecast treated “only 3.5 points away” too much like a continuation problem, when it may be a composition/conversion problem. I rechecked the official Roy Morgan releases: the June 9 release, covering June 1–7, has One Nation at a record 29.5% primary, but the relevant ALP-vs-One Nation 2PP is still ALP 53.5 / One Nation 46.5, explicitly unchanged from the prior week; Roy Morgan also says One Nation’s post-budget gains have mainly come at the Coalition’s expense while Greens gains have come at Labor’s expense. (roymorgan.com)
The critic is also right that the plateau is a stronger negative update than I initially allowed. The May 25 and June 1 regular releases both put the ALP-vs-One Nation 2PP at 53.5 / 46.5, so the qualifying series is essentially 46.0 → 46.5 → 46.5 → 46.5 for One Nation, while the primary vote has moved much more dramatically. (roymorgan.com) That suggests many marginal primary-vote changes are not moving the constructed 2PP much: extra One Nation votes from ex-Coalition voters probably add only modestly, because those voters were already likely to prefer One Nation over Labor in an ALP-vs-One Nation allocation.
I still would not collapse the probability to a very low number. The political situation is unusually unstable, Roy Morgan’s own snap SMS poll immediately after the budget showed ALP 51 / One Nation 49, and there are still roughly 8–9 weekly opportunities for either real movement, sampling/rounding noise, or a methodology/reporting shift to produce a qualifying 50.0% headline. But the snap poll should be used as “possible, not yet regular-series confirmed”: the May 18 regular poll, despite referencing the special post-budget SMS preference flows, still had the regular ALP-vs-One Nation result at ALP 54 / One Nation 46. (roymorgan.com)
My updated estimate is therefore closer to the critic’s: about 25–27% probability of a qualifying crossing by 2026-08-12 12:00 UTC, rather than my prior ~30–35%. I choose ~26% as the central mass: high enough to respect the unprecedented volatility and near-miss snap poll, but lower because the regular weekly 2PP has not validated the primary-vote surge.
Updated prediction:
Percentile 0.1: 2026-06-15
Percentile 1: 2026-06-16
Percentile 5: 2026-06-23
Percentile 10: 2026-07-07
Percentile 20: 2026-07-28
Percentile 30: 2026-08-24
Percentile 40: 2026-12-01
Percentile 50: 2027-09-01
Percentile 60: 2028-08-01
Percentile 70: 2030-01-01
Percentile 80: 2033-01-01
Percentile 90: 2040-01-01
Percentile 95: 2045-01-01
Percentile 99: 2055-01-01
Percentile 99.9: 2070-01-01
I think the critic’s core objection is valid: I was putting too much weight on the primary-vote surge and not enough on the fact that the exact resolving metric has been stubborn. Roy Morgan’s latest regular release has One Nation at 29.5% primary, ahead of ALP and L-NP, but the ALP-vs-One Nation 2PP remains ALP 53.5 / One Nation 46.5, unchanged from the prior week. Roy Morgan also explicitly characterizes the post-Budget shifts as One Nation gaining mainly at the expense of the L-NP, while Greens gained at the expense of ALP—exactly the pattern that can produce dramatic primary-vote movement without much movement in ALP-vs-ON 2PP. (roymorgan.com)
I still do not want to go very low. The question is not asking whether One Nation would win an election; it is asking whether a relatively new Roy Morgan bilateral construct prints 50.0 once in roughly nine weekly opportunities. Weekly samples around ~1,500–1,700 imply meaningful noise, and the excluded special SMS poll at least demonstrated that Roy Morgan’s machinery can produce a near-threshold ALP 51 / One Nation 49 reading under some circumstances. But the regular weekly series did not confirm that reading afterward, so I now treat the snap poll more as “tail evidence” than as a leading indicator. (roymorgan.com)
The most important new insight for me is that Coalition cannibalization may have diminishing returns for the resolving metric. If many L-NP voters already prefer One Nation over Labor in this hypothetical 2PP, then further One Nation gains from the Coalition may not move the bilateral much. The path to 50 likely requires either: a further Labor-to-One-Nation shift, a sharp change among independents/others, a preference-flow/methodology jump, or another salient Labor-damaging shock.
I also accept the critic’s point that Roy Morgan reporting risk matters: if One Nation’s surge fades or the narrative shifts, the ALP-vs-ON 2PP may stop being reported prominently enough to qualify. I would not weight this heavily before August, since Roy Morgan is currently presenting this matchup as electorally important, but it is another downside risk. (roymorgan.com)
Updated probability judgment, conditioned on no annulment: I now put the probability of a qualifying regular weekly release on or before 2026-08-12 12:00 UTC at about 19%, down from my previous ~25–30%. The critic’s suggested ~18% is close to my revised view; I am only slightly higher because one noisy/rounded 50.0 print remains plausible in a volatile environment.
Updated prediction:
Percentile 0.1: 2026-06-15
Percentile 1: 2026-06-17
Percentile 5: 2026-07-01
Percentile 10: 2026-07-15
Percentile 20: 2026-08-20
Percentile 30: 2026-11-01
Percentile 40: 2027-04-01
Percentile 50: 2028-01-01
Percentile 60: 2028-12-01
Percentile 70: 2030-06-01
Percentile 80: 2033-01-01
Percentile 90: 2038-01-01
Percentile 95: 2043-01-01
Percentile 99: 2055-01-01
Percentile 99.9: 2070-01-01
Modal: Aug 12, 2026 to Oct 09, 2026 (38.6%) • frontier aggregate • 4m40s
Edge cases:
| Agent | Forecast | Rationale | Status |
|---|---|---|---|
| frontier_1 | Modal: Aug 12, 2026 to Oct 09, 2026 (70.0%) | As of the latest qualifying weekly Roy Morgan release (published 2026-06-09), the ALP–vs–One Nation 2PP stands at ALP 53.5% vs One Nation 46.5%, unchanged from the prior week. One | complete |
| frontier_2 | Modal: After Apr 02, 2027 (30.5%) | The ALP-vs-ON 2PP in Roy Morgan’s regular weekly series has been completely flat at ALP 53.5 / ON 46.5 across the last 3-4 releases (mid-May through June 9, 2026), despite ON’s pri | complete |
| frontier_3 | Modal: After Apr 02, 2027 (12.4%) | One Nation requires a 3.5 percentage point increase in its 2PP performance to meet the 50.0% threshold. Operating inside an 8-9 week window ending mid-August, we expect routine wee | complete |
| frontier_4 | Modal: Aug 12, 2026 to Oct 09, 2026 (85.0%) | Latest regular weekly releases (ending 31 May and 7 June 2026) show the headline ALP-vs-One Nation 2PP fixed at 53.5–46.5 despite One Nation’s record 29.5% primary. Closing the rem | complete |
Most agents anchor to the same Roy Morgan June baseline and distribute probability mass sensibly (rising hazard into late July/early August, large residual mass after the deadline). frontier_4 is noticeably overconcentrated on a single post-deadline bin (bin_8) given the stated week-to-week volatility and model uncertainty; this should be flagged for human review when combining forecasts.
Agreement: Aggregated 4 comparable prediction maps on the canonical bin space.
Disagreement: See per-agent rationales: As of the latest qualifying weekly Roy Morgan release (published 2026-06-09), the ALP–vs–One Nation 2PP stands at ALP 53.5% vs One Nation 46.5%, unchanged from the prior week. One Nation therefore needs roughly a further 3.5 points on this specific 2PP measure to reach ≥50.0%. Weekly cadence and metadata timestamps are reliable, so any qualifying crossing would likely appear in a Tuesday/Wednesday AEST post before the 2026-08-12 12:00 UTC cutoff. Given typical week-to-week 2PP volatility, preference-flow dynamics (Greens preferences tending to ALP vs ON), and apparent 0.5-point rounding, a first crossing before the deadline is possible but more likely to occur after; hence a majority of mass is placed on the >deadline aggregate bin, with a rising-but-still-modest tail into late July/early August. / The ALP-vs-ON 2PP in Roy Morgan’s regular weekly series has been completely flat at ALP 53.5 / ON 46.5 across the last 3-4 releases (mid-May through June 9, 2026), despite ON’s primary vote surging from ~25% to 29.5%. This stickiness reflects Roy Morgan’s preference flow methodology (anchored to 2025 election flows) and the fact that ON’s gains are coming largely from L-NP voters whose preferences split. ON needs +3.5 points of 2PP in ~9 weekly releases to cross 50%. With essentially zero movement recently, the base-rate probability of crossing in-window is low (~10-12%). If a crossing occurs, it’s more likely in the later weeks as the primary-vote trend potentially feeds through, so I weight bins 4-7 slightly higher than bins 0-3. The vast majority of mass (~88%) sits in the post-deadline aggregate bins (bin_8+). / One Nation requires a 3.5 percentage point increase in its 2PP performance to meet the 50.0% threshold. Operating inside an 8-9 week window ending mid-August, we expect routine week-to-week random polling error (sigma ~1.75%) to make a jump to 50% highly unlikely initially (<3% per week), but compounding probability over the period creates a real chance of an outlier print. If an underlying positive drift (+0.2% to +0.3% per week) also continues, the statistical likelihood of reaching the threshold rises sharply in the later bins (July & early August). Taking these factors together alongside a static baseline scenario, we estimate a ~38% cumulative probability of crossing 50.0% before the August 12 timestamp. If the 50.0% figure is not reached on or before this time, the question resolves as ‘greater than’ the deadline (falling uniformly into bins 8 through 12, mapping to > August 2026 outcomes).
Mechanical frontier aggregation via logit_mean across 4 successful agents.
(frontier_1) As of the latest qualifying weekly Roy Morgan release (published 2026-06-09), the ALP–vs–One Nation 2PP stands at ALP 53.5% vs One Nation 46.5%, unchanged from the prior week. One Nation therefore needs roughly a further 3.5 points on this specific 2PP measure to reach ≥50.0%. Weekly cadence and metadata timestamps are reliable, so any qualifying crossing would likely appear in a Tuesday/Wednesday AEST post before the 2026-08-12 12:00 UTC cutoff. Given typical week-to-week 2PP volatility, preference-flow dynamics (Greens preferences tending to ALP vs ON), and apparent 0.5-point rounding, a first crossing before the deadline is possible but more likely to occur after; hence a majority of mass is placed on the >deadline aggregate bin, with a rising-but-still-modest tail into late July/early August.
(frontier_2) The ALP-vs-ON 2PP in Roy Morgan’s regular weekly series has been completely flat at ALP 53.5 / ON 46.5 across the last 3-4 releases (mid-May through June 9, 2026), despite ON’s primary vote surging from ~25% to 29.5%. This stickiness reflects Roy Morgan’s preference flow methodology (anchored to 2025 election flows) and the fact that ON’s gains are coming largely from L-NP voters whose preferences split. ON needs +3.5 points of 2PP in ~9 weekly releases to cross 50%. With essentially zero movement recently, the base-rate probability of crossing in-window is low (~10-12%). If a crossing occurs, it’s more likely in the later weeks as the primary-vote trend potentially feeds through, so I weight bins 4-7 slightly higher than bins 0-3. The vast majority of mass (~88%) sits in the post-deadline aggregate bins (bin_8+).
(frontier_3) One Nation requires a 3…
| Bin | Probability |
|---|---|
| Jun 15, 2026 to Jun 22, 2026 | 1.3% |
| Jun 22, 2026 to Jun 29, 2026 | 1.7% |
| Jun 29, 2026 to Jul 07, 2026 | 2.4% |
| Jul 07, 2026 to Jul 14, 2026 | 3.0% |
| Jul 14, 2026 to Jul 21, 2026 | 3.4% |
| Jul 21, 2026 to Jul 28, 2026 | 3.9% |
| Jul 28, 2026 to Aug 05, 2026 | 4.4% |
| Aug 05, 2026 to Aug 12, 2026 | 5.3% |
| Aug 12, 2026 to Oct 09, 2026 | 38.6% |
| Oct 09, 2026 to Dec 07, 2026 | 8.5% |
| Dec 07, 2026 to Feb 03, 2027 | 7.6% |
| Feb 03, 2027 to Apr 02, 2027 | 6.7% |
| After Apr 02, 2027 | 12.9% |
wooley_rhino • run 690e2285 • $2.88 • 4m40s
Extracted Date Percentile Values: {0.1: 1781654400.0, 1.0: 1781654400.0, 5.0: 1782864000.0, 10.0: 1784073600.0, 15.0: 1785283200.0, 20.0: 1785888000.0, 25.0: 1786406400.0, 30.0: 1786579200.0, 35.0: 1786579200.0, 40.0: 1786579200.0, 45.0: 1786579200.0, 46.0: 1786579200.0, 47.0: 1786579200.0, 48.0: 1786579200.0, 49.0: 1786579200.0, 50.0: 1786579200.0, 51.0: 1786579200.0, 52.0: 1786579200.0, 53.0: 1786579200.0, 54.0: 1786579200.0, 55.0: 1786579200.0, 60.0: 1786579200.0, 65.0: 1786579200.0, 70.0: 1786579200.0, 75.0: 1786579200.0, 80.0: 1786579200.0, 85.0: 1786579200.0, 90.0: 1786579200.0, 95.0: 1786579200.0, 99.0: 1786579200.0, 99.9: 1786579200.0}
Model’s Answer: Looking at this forecasting problem, I need to carefully assess the probability and timing of One Nation reaching 50%+ in the Roy Morgan regular weekly ALP-vs-One Nation 2PP poll.
Current State (June 9, 2026 release):
Publication Cadence: Roy Morgan publishes weekly federal polls, typically mid-week following a Monday-Sunday fieldwork period. Looking at past releases:
Possible Resolution Dates: Approximately 8-9 weekly releases between now and August 12:
Assumption 1: The 2PP can shift significantly despite its recent stability (~20% chance of being wrong) The 2PP has stayed at 53.5-46.5 for weeks even as primaries shifted dramatically, suggesting structural preference flows favor Labor.
Assumption 2: Preference flows will remain roughly stable (~25% chance of change) Greens preferences heavily favor Labor, and Labor retains 71% of its 2025 voters per breakdowns.
Assumption 3: No major political shock will occur (~30% chance of one occurring) The snap poll showed 49% was achievable under Budget pressure, indicating volatility potential.
Arguments for earlier resolution:
Arguments for later/no resolution:
Given the stability of the 2PP despite significant primary vote shifts, the structural preference advantages for Labor, and the 3.5 point gap that needs to close, I estimate:
If it happens, it’s more likely in later weeks due to cumulative opportunity and potential trend continuation.
Percentile .1: 2026-06-17 Percentile 1: 2026-06-17 Percentile 5: 2026-07-01 Percentile 10: 2026-07-15 Percentile 15: 2026-07-29 Percentile 20: 2026-08-05 Percentile 25: 2026-08-11 Percentile 30: 2026-08-13 Percentile 35: 2026-08-13 Percentile 40: 2026-08-13 Percentile 45: 2026-08-13 Percentile 46: 2026-08-13 Percentile 47: 2026-08-13 Percentile 48: 2026-08-13 Percentile 49: 2026-08-13 Percentile 50: 2026-08-13 Percentile 51: 2026-08-13 Percentile 52: 2026-08-13 Percentile 53: 2026-08-13 Percentile 54: 2026-08-13 Percentile 55: 2026-08-13 Percentile 60: 2026-08-13 Percentile 65: 2026-08-13 Percentile 70: 2026-08-13 Percentile 75: 2026-08-13 Percentile 80: 2026-08-13 Percentile 85: 2026-08-13 Percentile 90: 2026-08-13 Percentile 95: 2026-08-13 Percentile 99: 2026-08-13 Percentile 99.9: 2026-08-13
Weekly publication cadence and a fixed deadline create only a handful of qualifying opportunities before 12 August 2026.
Sampling noise, half‑point reporting increments, and typical samples near 1.5k constrain how large a true shift must be before a published 50.0% print appears.
One Nation’s first‑preference surge has been pronounced, but the ALP‑vs‑One Nation two‑party‑preferred measure has remained stubbornly in the mid‑46s.
Most of One Nation’s gains so far have come from the Coalition side, which moves the ALP‑vs‑One Nation 2PP only modestly compared with direct defections from Labor or the Greens.
A sustained flow of Labor or Green voters to One Nation, or a large reallocation of ‘other’ preferences toward One Nation, is the most efficient path to a 50.0% ALP‑vs‑One Nation print.
By contrast, further Coalition→One Nation shifts can lift One Nation’s primary standing without producing the same 2PP impact.
Key uncertainties include the true preference flows from recent converts, the stability of the surge under broader sampling, and the limited number of qualifying releases.
Rounding, sampling error, and a small upside tail from an excluded special poll mean a single lucky high print remains plausible even absent a major structural change.
Forecast: No qualifying Roy Morgan weekly release on or before 12 Aug 2026 (median date not available; no P50).
On what date on or before 12 August 2026 will the Roy Morgan ALP-vs-One Nation 2PP first show One Nation at or above 50.0%
Key figures
Historical context
Tailwinds
Headwinds
Detailed reasoning
My analysis of the timeline for One Nation reaching the 50.0% Two-Party-Preferred (2PP) threshold against Labor is based on a contrast between rapid primary vote growth and stagnant preference flows. As of the June 9th, 2026, release, One Nation holds a record 29.5% primary vote, yet its 2PP has remained fixed at 46.5% for three consecutive weeks. To reach 50.0%, One Nation needs a 3.5-point swing in the regular weekly series.
I have weighted the discrete Tuesday publication cycle of Roy Morgan as the primary engine for resolution. While ‘special’ polls and competitor data (like Redbridge) show One Nation as high as 49% or 51%, the resolution criteria strictly require a ‘regular weekly’ Roy Morgan release. These regular releases have historically shown more stability, suggesting that a 3.5-point jump is a significant statistical and political hurdle.
The path to 50.0% likely involves one of two scenarios:
I have placed the 25th percentile in September 2026 to account for the time needed for these structural shifts to manifest in the more conservative ‘regular’ polling methodology. There is a significant possibility (estimated at 45-60% across various models) that the event never occurs, as populist surges in Australian politics often encounter a ‘preference ceiling’ where major-party voters ultimately return to the traditional duopoly when faced with a 2PP choice. Consequently, the forecast reflects a period of heightened risk followed by a tapering off as the ‘novelty’ of the budget shock potentially fades.
Key uncertainties
Conclusion