Boyne Island is a coastal town in Queensland's Gladstone Region, situated approximately 25 kilometres south of Gladstone CBD on the west bank of the Boyne River. Its SEIFA IRSAD score of 931 places it in decile 3 of 10 nationally and at the 34th percentile within Queensland, firmly in the disadvantaged band. That reading reflects the suburb's economic profile as a residential base built primarily around industrial employment, particularly the nearby Boyne Smelters aluminium facility. Investors should treat this SEIFA position as a structural input, not a verdict on any individual listing.
ABS 2021 IRSAD release. Score 931 (national mean = 1000).
A SEIFA score of 931 sits 69 points below the national mean of 1000. In PropertyRanker's model, this reading feeds directly into three of the twelve scoring criteria: economic_strength, hazard_risk, and entry_point_risk. On economic_strength, the score signals a workforce that is concentrated in trade and industrial occupations tied to a single large employer. That concentration creates both a floor and a ceiling: demand for rental housing can be relatively stable when the smelter and Gladstone's broader port and energy industries are operating at capacity, but it is also exposed to commodity cycles and industrial restructuring in a way that a more diversified suburban economy is not. On entry_point_risk, a below-average SEIFA reading in a regional industrial town typically correlates with lower median price points relative to capital cities, which can compress the dollar gap between purchase cost and replacement cost. That dynamic can support yield, but it also limits the pool of owner-occupier buyers who would underpin capital growth over time. On hazard_risk, SEIFA is used as a proxy for the capacity of a local population to absorb financial shocks; a decile 3 reading suggests that capacity is constrained. The suburb's owner-occupier rate of around 66 percent is a moderating factor, indicating a degree of residential stability that pure rental markets at this SEIFA level do not always show. Strategy alignment leans toward High Yield or Regional profiles, where gross-yield anchors of around 6 to 7 percent are the primary target, rather than Capital Growth strategies that depend on sustained price appreciation driven by income and population growth.
Boyne Island houses recorded a median sale price of $660,000 as at April 2026, reflecting 22% annual capital growth per CoreLogic data published by yourinvestmentpropertymag.com.au. There were 135 house sales in the 12 months to April 2026 with an average of just 15 days on market, signalling strong buyer demand. Vendor discounting is negligible at -0.07% per propertyvalue.com.au, and the rental vacancy rate sits at approximately 1.1%, consistent with a tight rental market driven in part by Boyne Smelter contractor demand.
Anchor points pulled per refresh from publicly available suburb profiles. Approximate; not a moving average.
All three signals point to a seller's market: vacancy at 1.1% is tight, houses are selling in just 15 days on average, and vendor discounting is negligible at -0.07%, indicating vendors are achieving near-asking prices.
Sources: Boyne Island QLD 4680 Suburb Profile & Property Report (2026-07-16); Boyne Island House Prices & Property Trends (2024-01-01); BOYNE ISLAND QLD Property Prices & Market Trends (2025-10-01); BOYNE ISLAND QLD AU Suburb Profile - Smart Property Investment (2026-01-01); Boyne Island QLD 4680 Property Market and House Prices 2025 (2025-01-01) · Refreshed 9 Sep 2026
PropertyRanker scores any Australian property against 12 criteria across three pillars: Growth, Cashflow, and Risk. SEIFA is a primary signal for economic strength and a supporting one for entry-price risk. It also informs the crime side of hazard risk, though physical overlays like flood, bushfire and coastal exposure, and recorded crime data where available, take priority there. The decile of 3 shown above gives a listing in Boyne Island a softer starting line on economic strength, though often a firmer one on entry-price risk, since less advantaged postcodes usually carry lower entry prices.
On top of that, PropertyRanker chooses one of four strategies (Balanced, Growth, Yield, Regional) and applies a per-strategy yield anchor. The anchors are 3.5% for Growth, 5% for Balanced, 6% for Yield, and 7% for Regional. A postcode at this level tends to make the Yield (6% anchor) and Regional (7% anchor) strategies more reachable, because a lower entry price lifts the gross yield a listing can achieve, while a Growth result usually depends on a specific catalyst such as an infrastructure or renewal pipeline.
Read the scoring guide for the full criteria list and how the verdict thresholds work.
The SEIFA reading establishes the macro frame, but it cannot see the variables that determine whether a specific listing is worth pursuing. Investors should verify the current SQM vacancy rate for postcode 4680, since industrial-town rental markets can shift quickly when a major employer changes headcount. Body corporate health matters for any unit or townhouse, particularly in a market where owner-occupier demand is moderate and strata levies can compress net yield. Flood and overlay status is a specific concern given Boyne Island's river-surrounded geography; the Boyne River has a documented flood history and any property near the waterfront or low-lying areas warrants a council overlay check before proceeding. Pricing should be tested against recent comparable sales rather than relying on suburb-level medians, because the spread between well-located riverfront stock and standard residential lots in this postcode can be significant. Score the specific listing in PropertyRanker to get a verdict that accounts for all of these factors alongside the SEIFA signal.
The data presents a mixed picture. Boyne Island's SEIFA IRSAD score of 931 (decile 3 nationally) signals a below-average socioeconomic base, which PropertyRanker flags as a constraint on economic_strength and entry_point_risk. The suburb's industrial employment base and reasonable owner-occupier rate of around 66 percent provide some demand stability, but concentration around a single major employer adds cyclical risk. Whether a specific property is worth pursuing depends on the listing's yield, vacancy exposure, and overlay status, not the postcode average alone.
Given the decile 3 SEIFA reading and the suburb's industrial-residential character, Boyne Island aligns most naturally with PropertyRanker's High Yield strategy (gross-yield anchor around 6 percent) or Regional strategy (around 7 percent), rather than Capital Growth (around 3.5 percent). Capital Growth strategies rely on sustained income and population growth to drive price appreciation, and a disadvantaged SEIFA band in a single-industry town makes that harder to sustain. Investors targeting yield should still score the specific listing, since vacancy and body corporate costs can erode gross yield significantly in this market.
The primary structural risk is employer concentration: the suburb developed to house workers at the Boyne Smelters aluminium plant and the broader Gladstone industrial precinct, so rental demand is sensitive to commodity cycles and industrial headcount decisions. The river-surrounded geography introduces flood and overlay risk that must be checked at the individual property level, not assumed from the suburb name. A SEIFA score of 931 also indicates a population with limited financial buffer, which can affect tenant quality and the pace of rent recovery after vacancies.
Boyne Island and Tannum Sands share postcode 4680 and are separated only by the Boyne River, so they draw from the same employment base and face similar macro-level SEIFA conditions. Tannum Sands has a stronger beach-facing lifestyle identity, which can support a slightly different buyer and renter profile compared to Boyne Island's more industrial-residential character. Investors comparing the two should score individual listings in PropertyRanker rather than treating the shared postcode as a uniform market, since street-level factors including flood overlays, proximity to the smelter buffer zone, and waterfront access vary considerably within the 4680 boundary.
PropertyRanker applies twelve scoring criteria to each listing. The SEIFA IRSAD reading of 931 (decile 3) feeds directly into three of those criteria: economic_strength, hazard_risk, and entry_point_risk. The remaining nine criteria draw on listing-level and postcode-level data including current SQM vacancy rates, flood and planning overlay status, body corporate health for strata properties, and pricing against recent comparable sales. The SEIFA signal sits on the macro side of the model and cannot see the specific street, build year, strata condition, or orientation, which is why scoring the individual listing is necessary for a complete picture.
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