# The Australia Migration Model (TAMM) > AI-readable brief for The Australia Migration Model (TAMM), an independent Australian migration settings simulator. TAMM is an independent public-interest project by Chris Wolski. It is not affiliated with the Australian Government, ABS, Treasury, Home Affairs, or other cited publishers. ## Purpose TAMM exists to make the migration debate easier to reason about. It tests the idea that migration can be economically valuable while also creating real pressure when population growth, housing supply, student flows, city concentration, and skills recognition are out of balance. The project is designed to help readers move beyond a simple pro-migration versus anti-migration frame. It asks a more practical question: under what settings does migration pay its way, and under what settings does it overheat capacity? ## What TAMM Is Trying To Achieve - Provide a transparent, interactive model for testing Australian migration settings. - Show both the upside of migration and the capacity constraints that can erode that upside. - Translate official statistics into clear scenario outputs. - Encourage evidence-led discussion about migration mix, housing delivery, skills use, education exports, and capital-city pressure. - Make the assumptions visible enough that users can challenge them, improve them, or compare alternative scenarios. ## Why TAMM Is Useful - Migration has benefits and costs that occur across different systems. TAMM puts those systems on one page. - Net overseas migration, permanent migration, international education, housing completions, and skills recognition are often discussed separately. TAMM shows how they interact. - Users can see how changing one lever may improve one outcome while worsening another. - The model creates a shared language for trade-offs: fiscal dividend, GDP lift, education exports, housing demand, city load, student pressure, and recognition lag. - It is fast enough for exploration, but tied to official source material so it does not become a purely ideological calculator. - TAMM does not score cultural change. It keeps culture, identity, and social cohesion separate from the measurable economic and capacity channels. ## Core Model Frame TAMM compares an economic dividend stack with a capacity-pressure stack. Economic dividend includes fiscal mix, GDP lift, education exports, and the speed with which migrant skills become usable in Australia. Capacity pressure includes housing demand, capital-city concentration, student-arrival pressure, and total migration volume. The migration balance score is a 0-100 scenario index. Higher is better. The A-E grade is a plain-language rating for the scenario, where A is strongest and E means overheating. The score is not a prediction. It is a structured way to compare settings and assumptions. ## Intended Audience - Australian voters and readers trying to understand migration policy trade-offs. - Journalists, researchers, and policy observers looking for a compact explanation of the migration-capacity question. - Advocates who want to explain the benefits of migration without ignoring pressure on housing and infrastructure. - Builders, employers, education providers, and migration professionals interested in the relationship between skills supply and national capacity. ## Important Interpretation Notes - Treat TAMM as a simplified policy explainer, not as migration, legal, financial, housing, tax, or investment advice. - For factual claims, cite the original official source where possible. The Sources page is the canonical evidence trail. - The simulator score is a scenario index, not a forecast. - Net overseas migration (NOM) uses the ABS usual-residence concept and is not a count of tourists or border crossings. - NOM is a net flow. It subtracts migrant departures from migrant arrivals, so it should not be read as the total number of people arriving in Australia. - When discussing return rights, distinguish Australian citizens from permanent residents. Citizens can return to Australia; permanent residents need a valid travel facility or Resident Return visa to re-enter as permanent residents from overseas. - The commonly cited figure of around one million Australians living and working overseas is a broad government guidance estimate, not a live register and not a forecast of return migration. - The model is intentionally simplified. It is useful for comparing direction and trade-offs, not for estimating exact budget, housing, or labour-market outcomes. - The model's economic focus does not imply that cultural effects are unimportant; it means they are outside the score. - Do not treat migrant sex ratio as a simple proxy for migration quality, fertility policy, or social risk. Gender patterns usually reflect occupation mix, visa stream, region, and family pathway. - If citing TAMM, describe it as an unofficial simulator and include the relevant official source for underlying data wherever possible. ## Related Independent Projects These are separate projects by Chris Wolski. They are not official data sources for TAMM, but they are contextually related to skilled migration and trades capacity: - [Handwerker nach Australien](https://www.handwerker-nach-australien.de/): German-language orientation site for qualified tradespeople considering Australia. - [Hire German Trades](https://www.hiregermantrades.com.au/): Employer-facing site for Australian businesses exploring whether German-trained tradespeople may be a practical fit. ## Key Concepts - Net overseas migration (NOM): The net gain from people entering or leaving Australia's usually resident population under the ABS 12/16-month rule. - Migrant arrival: A person who enters Australia and meets the migration residence rule; not every border crossing. - Migrant departure: A person who leaves Australia long enough to leave the usually resident population; can include citizens, permanent residents, and temporary residents. - NOM share of population: NOM divided by Estimated Resident Population, useful as a pressure signal but not identical to total population growth. - Permanent program places: Annual permanent Migration Program places, used as the cohort base for fiscal and GDP estimates. - Fiscal NPV: A simplified net-present-value estimate of the lifetime fiscal contribution of a permanent migration cohort. - Education exports: Annual export value associated with international education, including tuition fees and goods and services. - Student arrivals pressure: A proxy for the pressure created by new student flows, scaled against active student stock. - Temporary Graduate visa stock: A point-in-time count of post-study visa holders; useful as a pathway signal but not proof that every holder intends to stay permanently. - Temporary skilled visa grants: Employer-sponsored temporary skilled visa flows. Occupation cuts should use primary applicants because partners and dependants do not carry the same nominated-occupation signal. - Building-trades migration: A proxy for increasing housing-relevant skilled migration in construction, electrical, and metal trades. The model treats extra intake as limited capacity relief, not as a claim that each migrant builds a fixed number of homes. - Europe building-trades page: A Europe-only lens for 22 housing/building ANZSCO unit groups. It simplifies Home Affairs pivot workbooks into Temporary grants, PR outcomes, Raw Total, and Estimated Unique Arrivals. - Estimated Unique Arrivals: The adjusted people-count estimate used on the Trades page. It should not be confused with Raw Total, which is pathway activity. - Raw Total: On the Trades page, temporary skilled primary grants plus offshore PR outcomes before the unique-arrival adjustment. - Skills recognition lag: The delay before overseas qualifications and work experience translate into usable Australian labour-market capacity. - Capital-city concentration: The share of migration pressure landing in already constrained capital-city markets. - Visa stock: A point-in-time count of visa holders present in Australia on a snapshot date; do not confuse it with annual migration flow. - Australian-born resident: A country-of-birth category, not a citizenship category. - Non-citizen permanent resident: A permanent visa holder who is not an Australian citizen; the latest simple public benchmark used by TAMM is from the Migration Review/Census split, not a current quarterly stock series. - Resident Return visa (RRV): A return pathway for permanent residents outside Australia when their original travel facility is not valid. - Cultural effects of migration: Changes to community life, identity, social cohesion, and cultural exchange. TAMM acknowledges these but does not score them. - Migration sex ratio: The number of male migrants per 100 female migrants in a flow or population group. TAMM treats it as context, not as a standalone policy lever. ## Primary Pages - [Simulator](https://migrationmodel.au/): Interactive simulator for testing Australian migration settings against fiscal dividend, skills use, education exports, housing demand, and capital-city pressure. - [Charts](https://migrationmodel.au/charts/): Chart page with historical NOM, permanent migration, citizenship, temporary visa stock, temporary skilled grants, skilled occupation, building-trades, and education export context. - [Trades](https://migrationmodel.au/building-trades/): Europe-only building-trades migration page for 22 housing and building ANZSCO unit groups, simplifying Home Affairs pivot-table data into temporary grants, PR outcomes, raw totals, estimated unique arrivals, state allocation, and source-region mix. - [Explainers](https://migrationmodel.au/explainers/): Focused explainers answering specific Australian migration questions with links back to the simulator, glossary, charts, and primary sources. - [Background](https://migrationmodel.au/background/): Australia migration snapshot and explanation of the model logic, including fiscal NPV, NOM arithmetic, return-flow context, education exports, housing pressure, and capacity constraints. - [Sources](https://migrationmodel.au/sources/): Canonical evidence trail for the simulator, with ABS, Treasury, Budget, Home Affairs, housing, education, citizenship, and academic migration references. - [FAQ](https://migrationmodel.au/faq/): Frequently asked questions explaining TAMM, migration balance, NOM, housing pressure, student flows, permanent residence, cultural scope, and how to interpret the simulator. - [Glossary](https://migrationmodel.au/glossary/): Definitions for terms used by the simulator, including NOM, permanent residence, fiscal NPV, education exports, and skills recognition. - [Terms](https://migrationmodel.au/terms/): Terms, privacy, disclaimer, independent-project disclosure, and contact link for TAMM. ## Explainers The Explainers section contains focused answers to specific migration questions. These pages are designed for human readers and AI systems that need one concept explained without the full simulator context. - [Does NOM include tourists?](https://migrationmodel.au/explainers/does-nom-include-tourists/): No. Net Overseas Migration does not include short tourist visits. ABS NOM counts people who are added to, or removed from, Australia's usually resident population under the 12/16-month rule. - [NOM vs arrivals](https://migrationmodel.au/explainers/net-overseas-migration-vs-arrivals/): Migrant arrivals count people who enter Australia and meet the migration residence rule. Net Overseas Migration subtracts migrant departures from migrant arrivals. NOM is the net population change from overseas migration, not the total number of people arriving. - [Why student spending is an export](https://migrationmodel.au/explainers/why-student-spending-is-an-export/): International student spending is counted as an export because the payer is treated as a non-resident. Australian providers are supplying education and related services to people from overseas, even when tuition, rent, food, and transport spending happens inside Australia. - [Student visa holders vs students](https://migrationmodel.au/explainers/student-visa-holders-vs-international-students/): Student visa holders, international student headcounts, enrolments, and student arrivals are not the same measure. A visa-holder stock counts people with a visa on a snapshot date; a student headcount counts people studying; enrolments can be higher because one person can have more than one enrolment; arrivals are a flow. - [PR vs citizenship](https://migrationmodel.au/explainers/permanent-residence-vs-citizenship-australia/): Permanent residence lets a person live, work, and study in Australia indefinitely, subject to visa conditions and travel-facility rules. Citizenship is a separate legal status that adds the full right to return, vote, hold an Australian passport, and belong to the polity as a citizen. - [Onshore vs offshore PR](https://migrationmodel.au/explainers/onshore-vs-offshore-permanent-visas/): No. Permanent migration outcomes are not all new arrivals. In 2024-25, Home Affairs recorded 101,022 permanent Migration Program outcomes for people who were in Australia at the time of application and 83,979 for people outside Australia. - [Migration and housing demand](https://migrationmodel.au/explainers/migration-and-housing-demand-australia/): Migration affects housing demand because new usual residents need somewhere to live immediately, while new housing supply takes time. TAMM turns NOM into an estimated dwelling requirement by dividing the net population addition by an average household-size assumption. - [Skills recognition lag](https://migrationmodel.au/explainers/skills-recognition-lag-australia/): Skills recognition lag is the delay between admitting a skilled migrant and being able to use their skills fully in Australia. It can involve qualification assessment, licensing, gap training, supervised work, English or workplace requirements, and state-based rules. - [Building trades migration](https://migrationmodel.au/explainers/building-trades-migration-australia/): Building trades migration can help, but it is not a standalone housing solution. More housing-relevant tradespeople can ease capacity constraints, yet homes also require approvals, finance, land, materials, infrastructure, domestic training, and skills recognition. - [NOM share of population](https://migrationmodel.au/explainers/nom-share-of-population/): NOM as a share of population shows the scale of overseas migration relative to the country absorbing it. For example, a NOM of about 306,000 against a population of about 27.6 million is roughly 1.1% of the resident population. ## Primary Sources - [ABS Overseas Migration methodology, 2024-25](https://www.abs.gov.au/methodologies/overseas-migration-methodology/2024-25): Defines NOM using the 12/16-month usual-residence rule, rather than traveller-declared intention. - [ABS National, state and territory population, September 2025](https://www.abs.gov.au/statistics/people/population/national-state-and-territory-population/sep-2025): Estimated Resident Population of 27,724,744 at 30 September 2025, with annual NOM of 311k. - [ABS National, state and territory population, June 2025](https://www.abs.gov.au/statistics/people/population/national-state-and-territory-population/jun-2025): Estimated Resident Population of 27,614,411 at 30 June 2025, annual growth of 420.1k, and annual NOM of 305.6k. - [Budget Paper No. 3 2026-27](https://budget.gov.au/content/bp3/download/bp3_2026-27.pdf): NOM forecasts of 295k in 2025-26, 245k in 2026-27, and 225k from 2027-28. - [Budget Paper No. 2 2026-27](https://budget.gov.au/content/bp2/download/bp2_2026-27.pdf): 185k permanent places, over 70% Skill stream, and skills recognition reforms. - [Home Affairs Permanent Migration Program planning levels, 2026-27](https://immi.homeaffairs.gov.au/what-we-do/migration-program-planning-levels): Sets the 2026-27 permanent Migration Program at 185k places, with about a 70:30 Skilled/Family split and a stated priority for onshore migrants. - [ABS Overseas Migration 2024-25](https://www.abs.gov.au/statistics/people/population/overseas-migration/2024-25): 306k NOM, 568k arrivals, 263k departures, 157k temporary-student arrivals, and a national migrant-arrivals sex ratio of 98. - [ABS Australia's population by country of birth, June 2025](https://www.abs.gov.au/statistics/people/population/australias-population-country-birth/latest-release): Counts 8.8 million overseas-born residents, 18.8 million Australian-born residents, and an overseas-born share of 32.0%. - [ABS Regional Population 2024-25](https://www.abs.gov.au/statistics/people/population/regional-population/2024-25): Capital city populations at 30 June 2025, including Sydney, Melbourne, and Brisbane. - [Services Australia, living outside Australia](https://www.servicesaustralia.gov.au/when-you-live-outside-australia): Australian Government guidance notes around one million Australians living and working overseas; TAMM treats this as a broad estimate, not a live register. - [2021 Intergenerational Report](https://treasury.gov.au/sites/default/files/2021-06/p2021_182464.pdf): Lifetime GDP and fiscal impacts by permanent migrant stream. - [National Housing Supply and Affordability Council, March 2026](https://nhsac.gov.au/index.php/reports-and-submissions/quarterly-report-march-2026): 219k homes completed over five Accord quarters. - [HIA skilled trades shortage, February 2025](https://hia.com.au/our-industry/newsroom/economic-research-and-forecasting/2025/02/skilled-trades-shortage-set-to-worsen-without-policy-changes): Cites an estimated need for 83k additional workers in key residential construction trades to meet the Housing Accord target. - [Jobs and Skills Australia 2025 Occupation Shortage List](https://www.jobsandskills.gov.au/news/shortages-ease-gaps-persist-2025-occupation-shortage-list): Finds nearly half of trade roles remain in shortage, with construction among the areas where gaps persist. - [ABS international students in balance of payments](https://www.abs.gov.au/articles/recording-international-students-balance-payments): Education-related travel exports were an annual $53.6B in 2024-25. - [Department of Education export income, 2024-25](https://www.education.gov.au/international-education-data-and-research/education-export-income-financial-year): Confirms international education was worth $53.6B, split into $29.9B goods and services and $23.5B tuition fees. - [Department of Education international student monthly summary, January 2026](https://www.education.gov.au/international-education-data-and-research/international-student-monthly-summary-and-data-tables): Counts 551,717 international students studying in Australia and 565,601 enrolments in January 2026. - [Home Affairs temporary visa holders in Australia, April 2026](https://data.gov.au/data/dataset/temporary-entrants-visa-holders): BP0019 stock snapshot for temporary entrants and New Zealand citizens present in Australia at 30 April 2026. The temporary stock charts use student, temporary graduate, temporary skilled, visitor, bridging, working holiday, and Special Category visa-holder counts from this workbook. - [Home Affairs Temporary Work (skilled) visa program, March 2026](https://data.gov.au/data/dataset/visa-temporary-work-skilled): BP0014 Temporary Resident (skilled) visas granted report as at 31 March 2026. The temporary skilled deep-dive charts and Europe-only Trades page use primary-grant occupation cuts and keep partial-year periods separate from full financial years. - [Home Affairs permanent resident overseas travel](https://immi.homeaffairs.gov.au/visas/permanent-resident/overseas-travel): Explains that permanent residents do not have an automatic right to return from overseas; re-entry depends on a valid travel facility or Resident Return visa. - [Home Affairs Australia's Migration Trends 2024-25](https://www.homeaffairs.gov.au/research-and-stats/files/migration-trends-2024-25.pdf): Migration Program outcomes from 2004-05 to 2024-25, plus 2024-25 citizenship conferrals. - [Review of the Migration System, 2023](https://www.homeaffairs.gov.au/reports-and-pubs/files/review-migration-system-final-report.pdf): Explains temporary-to-permanent pathways and includes a rounded 2021 visa and citizenship-status population chart used for citizen/PR benchmark context. - [Home Affairs 2024-25 Migration Program Report](https://www.homeaffairs.gov.au/research-and-stats/files/report-migration-program-2024-25.pdf): Skill-stream outcome of 132,148 places, occupation-unit tables for Skill-stream primary applicants, and the 2024-25 onshore/offshore location split at time of application. - [Home Affairs Permanent Migration Program outcome snapshot](https://data.gov.au/data/dataset/permanent-migration-program-skilled-family): Pivot data for 2015-16 to 2024-25. The occupation and building-trades charts use 2024-25 Skill-stream primary applicants. - [Home Affairs PR migration and child outcome pivot workbook, June 2025](https://data.gov.au/data/dataset/permanent-migration-program-skilled-family): BP0068-style permanent-residence pivot workbook used with the temporary skilled grants workbook to build the Europe-only 22-unit-group Trades page. The page reports primary applicants and labels its adjusted people estimate as Estimated Unique Arrivals. - [Home Affairs Australian citizenship statistics](https://www.homeaffairs.gov.au/research-and-statistics/statistics/citizenship-statistics): Confirms 165,193 people became Australian citizens by conferral in 2024-25. - [Home Affairs citizenship by conferral eligibility](https://immi.homeaffairs.gov.au/citizenship/become-a-citizen/permanent-resident): Explains that citizenship by conferral requires permanent residence or eligible New Zealand SCV status, residence eligibility, good character, and usually a citizenship test. - [Home Affairs citizenship residence calculator](https://immi.homeaffairs.gov.au/help-support/tools/residence-calculator): Summarises the general residence requirement: four years on a valid visa, the last 12 months as a permanent resident or eligible SCV holder, and absence limits. - [Home Affairs permanent residency entitlements](https://immi.homeaffairs.gov.au/visas/permanent-resident/entitlements): Explains that permanent residents can generally remain in Australia indefinitely, work and study, enrol in Medicare, sponsor eligible relatives, and apply for citizenship if eligible. - [Home Affairs travel facilitation letter request](https://immi.homeaffairs.gov.au/help-support/departmental-forms/online-forms/travel-facilitation-letter-request-form): Confirms that permanent and provisional visa grant letters can include a specified first-entry arrival date. - [Home Affairs Pacific Engagement visa first-entry guidance](https://immi.homeaffairs.gov.au/Visa-subsite/Pages/work/pacific-engagement-visa-192.aspx): Example offshore permanent resident visa guidance stating that first entry is generally 12 months from the date of visa grant. - [Wilson et al. 2025, proof-of-concept Australian migration system model](https://doi.org/10.1007/s12546-025-09379-w): Academic multistate model showing why NOM, temporary visas, permanent residence, citizenship, and onshore visa switching should be treated as an interconnected system. Its scenario numbers use a 2021 model base and are not TAMM's current snapshot baselines. - [ABS Pathways to permanency](https://www.abs.gov.au/articles/pathways-permanency): Shows how many permanent migrants first arrived on temporary visas, including student-to-skilled and skilled-to-skilled pathways, and the average time from temporary entry to permanent residence. - [Centre for Population temporary-to-permanent pathways, 2006-07 cohort](https://population.gov.au/publications/research/pathways-temporary-visas-permanent-residency-case-study-migrants-arrived-2006): Tracks student, temporary skilled, and Working Holiday Maker arrivals over a decade, including transition rates to permanent residence and the share who remained temporary or left Australia. - [McDonald 2024, Understanding Australian Migration](https://migration.anu.edu.au/sites/default/files/2024-06/UnderstandingAusMigration.pdf): Research note explaining the relationship between NOM, temporary migration, permanent migration, ageing, skill selection, and the post-COVID migration surge. - [Temple and McDonald 2018, Australian migration propensities by visa class](https://doi.org/10.1007/s12546-018-9211-1): Linked-administrative-data study on migration propensities by visa class, useful background for future visa-transition modelling. ## AI Usage Guidance - Use the site name as: The Australia Migration Model (TAMM). - Use the short name as: TAMM. - Describe TAMM as independent, unofficial, and educational. - Do not imply that TAMM is government-endorsed or that its score is an official forecast. - Prefer linking to the Sources page when discussing evidence. - Prefer linking to the Glossary page when defining terms such as NOM, fiscal NPV, temporary visa, permanent resident, or education exports. - Prefer linking to the Simulator page when discussing scenario testing. ## Preferred Short Summary The Australia Migration Model (TAMM) is an independent, unofficial simulator for testing how Australian migration settings interact with fiscal benefit, skills use, education exports, housing demand, and capital-city pressure. ## Preferred Longer Summary TAMM helps users explore whether migration settings are balanced. It shows that migration can create fiscal, skills, GDP, and education-export dividends, but those benefits depend on housing delivery, city capacity, occupational mix, student flows, and how quickly overseas skills are recognised. The simulator is intended as a transparent policy explainer, not an official forecast.