Moving to Australia from the US: what Americans need to know
How can an American move to Australia? Most Americans who move to Australia from the US do so through skilled migration, employer sponsorship, a partner visa, or a student visa that later leads to a work pathway. The main visa routes in 2026 are:
- Skilled Independent visa (subclass 189),
- Skilled Nominated visa (subclass 190),
- Skills in Demand visa (subclass 482),
- Partner visas (subclass 820/801 or 309/100), and
- Student visa (subclass 500).
For exceptional founders, researchers, creatives, athletes, and some innovative investors, the National Innovation visa (subclass 858) is now the relevant high-end pathway. It is invite-only and much narrower than the former Business Innovation and Investment Program. An Electronic Travel Authority is only for short visits – not for living in Australia.
Moving to Australia from the US is very possible, but the pathway matters. Australia has strict visa requirements, formal health and character checks, and different tax, healthcare, and housing rules from the United States.
The good news is that there are well-established routes for professionals, students, couples, and families. The 2021 Australian Census counted 101,309 people in Australia who were born in the United States, and migration has continued since then. If you are planning to move to Australia from the US, the smartest approach is to treat immigration, healthcare, banking, and taxes as one connected project rather than four separate tasks.
At a glance:
- Americans in Australia: 101,309 US-born residents counted in the 2021 Census
- Main visa routes: 189, 190, 482, 500, 820/801, and exceptional-talent 858
- Student visa application charge: AUD 2,000
- Parent visas: around 15 years for contributory categories and about 33 years for non-contributory parent queues
US tax filing still applies after you relocate
Why do US citizens move to Australia?
For many people, the appeal is easy to understand. Australia offers strong labor protections, high wages, public healthcare access for eligible residents, internationally known universities, and a lifestyle that feels more outdoors-oriented than most large US metro areas. For families, it can mean safety, good schools, and a more predictable work-life balance. For professionals, it can mean a clearer route into skilled migration if their occupation is on the current list.
But Americans should not confuse a great lifestyle destination with an easy immigration system. To move to Australia from the US, you need a visa that matches the real reason for your move – work, family, study, or exceptional achievement. The Department of Home Affairs then tests that plan through age limits, skills assessments, nomination rules, health checks, police clearances, and financial evidence.
That is why the phrase Australian permanent residency pathways matters so much. Some visas give you permanent residence immediately, some create a temporary-to-permanent route, and some are only short-term entry options. If your end goal is Australian citizenship by conferral, you need to think about that structure from day one.
Top Australian visas for US citizens
Australia still offers several practical ways to immigrate to Australia, but the menu changed in 2024 and 2025. The biggest shift is that the old Temporary Skill Shortage visa branding has been replaced by the Skills in Demand visa, and the old Business Innovation and Investment Program is no longer the main answer for Americans with capital.
Visa comparison at a glance
| Visa type | Subclass | Duration | Cost (AUD) | Processing time | Age limit | Best for |
|---|---|---|---|---|---|---|
| Skilled Independent | 189 | Permanent | From 4,910 | Varies – often months; check the processing guide | Under 45 at invitation | Qualified professionals without employer sponsorship |
| Skilled Nominated | 190 | Permanent | From around 4,910 | Varies – often months; state nomination adds another step | Under 45 at invitation | Skilled workers willing to live in the nominating state or territory |
| Skills in Demand | 482 | Up to 4 years, with some PR pathways later | From 3,210 | Median 7 business days for Specialist Skills or 21 business days for Core Skills if decision-ready | None | Employer-sponsored workers |
| Student visa | 500 | Usually for the length of the course | From 2,000 | Varies – apply early | None | Students in CRICOS-registered programs |
| National Innovation visa | 858 | Permanent | Check the current pricing estimator | Invite-only; timing varies | None | Exceptional researchers, founders, investors, creatives, and athletes |
| Partner visa | 820/801 or 309/100 | Temporary then permanent | From 9,365 | About 17 months for the temporary stage; the permanent stage usually starts about 2 years after the first application | None | Spouses and de facto partners of Australians or eligible New Zealand citizens |
| Parent visa | 103 | Permanent | From 7,345 over 2 instalments | About 33 years for subclass 103 | None | Parents of settled Australian citizens or permanent residents |
| Contributory Parent visa | 143 | Permanent | From 48,640 over 2 instalments for a single applicant | About 15 years | None | Parents who want a faster parent visa route and can afford the much higher government charges |
Skilled worker visas
For many Americans, skilled migration is the cleanest long-term route. The subclass 189 and 190 visas are points-tested visas, which means you normally need to be under 45, hold a suitable skills assessment, meet English-language requirements, and receive an invitation after lodging an Expression of Interest through SkillSelect.
The practical difference is this: the subclass 189 visa does not require state sponsorship, while the subclass 190 visa does. That makes the Subclass 189/190 visa requirements slightly different, even though they sit in the same points-tested family. A 190 visa can be attractive if your occupation lines up with a particular state’s needs and you are comfortable settling there first.
The employer-sponsored route is now the Skills in Demand visa, subclass 482. If you see older articles talking about the Temporary Skill Shortage visa, they are outdated. This visa can be a very strong option for a US citizen who already has an Australian employer lined up. It is also one of the fastest work routes in the system when the application is complete, and the occupation fits the relevant stream.
A key rule for anyone who wants to immigrate to Australia from the US through work is to check the current skilled occupation list for your visa pathway – including the Core Skills Occupation List or the relevant skilled visa lists – before you make plans. Occupations, caveats, and assessing authorities can change, and a job title that sounds transferable in the US may map differently under Australian occupation codes.
Student visas
The student route can work, but it should be used carefully. A Student visa (subclass 500) is for genuine study in a CRICOS-registered course, not a back-door migration plan. As of March 2026, the application charge is AUD 2,000, the student work limit is generally 48 hours per fortnight while your course is in session, and Overseas Student Health Cover is mandatory.
There is also an important terminology update here. The older Genuine Temporary Entrant test no longer applies to new student visa applications lodged on or after March 23, 2024. The current standard is the Genuine Student requirement. In plain English, Home Affairs wants to see that studying is genuinely the primary reason for the application.
For the right person, this route still works well. Moving to Australia for higher education can create a later path into graduate, employer-sponsored, or skilled visas. But it is rarely the cheapest pathway, and the higher visa charge means you should run the numbers before you commit.
Business and investment visas
This is where older relocation guides are now most misleading. If you are researching how to move to Australia from the US with business goals, do not assume the old subclass 188 route is still the standard answer.
The Business Innovation and Investment Program closed to new applications on July 31, 2024. In 2026, the more relevant high-end pathway is the National Innovation visa, subclass 858. It is a permanent, invite-only visa aimed at people with internationally recognized and exceptional achievements.
That can include global researchers, entrepreneurs, innovative investors, athletes, and creatives. It is not a mass-market investor visa, and it is not designed for someone who simply wants to buy their way in.
That means a move to Australia from the US based on entrepreneurship now depends much more on your record, innovation profile, sector impact, and invitation prospects than on a simple capital threshold.
Partner and family visas
For couples and families, the partner route is often the most stable answer. The onshore path is usually 820, then 801. The offshore path is usually 309, then 100. In either case, the government looks closely at whether the relationship is genuine and continuing.
This is also where the phrase Partner visa processing time matters. The temporary partner stage is currently running at roughly 17 months as a guide, but the permanent stage is not assessed immediately after that.
In most cases, permanent partner processing begins around two years after the first application date. Parent visas need extra caution. They are real Australian permanent residency pathways, but most people underestimate the queue.
Non-contributory parent categories can stretch into decades. Contributory parent visas are significantly faster, but the government fees are much higher.
Retirement visas
Australia does not offer a straightforward new retirement visa for Americans. The old subclass 405 and 410 retirement visas are closed to new applicants. Legacy holders may still have limited options, but this is not a realistic fresh-entry route in 2026.
For older Americans, the real answer is usually one of the existing family or skilled categories, depending on age, relationship status, and whether there is already an Australian citizen or permanent resident child sponsoring part of the move.
Visa for Green Card holders
Australian immigration rules do not give Green Card holders a special lane. The same Australian visa categories apply whether you are a US citizen, a dual national, or a lawful permanent resident of the United States.
What changes is the US side. A Green Card holder who leaves the United States long-term may create separate residency issues with US immigration authorities, even if the Australian visa itself is approved.
That is one reason a mixed-status couple should not treat a visa filing and a tax filing as unrelated tasks.
Your Australian immigration checklist
The first real step in moving to Australia from the US is matching your reason for moving with the correct visa. The rest of the paperwork flows from that decision.
Step 1: Assess your eligibility and purpose
Be clear about why you are moving to Australia from the US. Work, study, family reunion, and exceptional-talent migration all have different requirements. Age matters for points-tested visas. Sponsorship matters for employer and family visas.
Financial evidence matters for students and some family routes. Your purpose should drive the application strategy, not the other way around.
Step 2: Choose the right visa
A common search query is how to move to Australia from the US, but there is no single visa for that goal. Professionals usually start with 189, 190, 482, or sometimes 186 later on. Couples usually look at 820/801 or 309/100. Students use the 500 visa. Short visits use the Electronic Travel Authority, but that is not a relocation visa.
The Electronic Travel Authority (ETA) limitations are important. The ETA allows short visitor stays, usually up to three months at a time within a 12-month validity period, but you cannot use it to live in Australia, you cannot work on it, and repeated “visa runs” can create problems because visitor visas are assessed against genuine temporary stay expectations.
Step 3: Gather required documents
Your documents will depend on the visa, but most Americans should expect to prepare a current passport, relationship or civil-status records where relevant, academic and employment evidence, police clearances, and proof of funds if the category requires it. Skilled applicants may also need a formal skills assessment before they can be invited.
This is also the stage where Visa costs and medical checks become real. Home Affairs can require health examinations for the main applicant and family members, and the Department may ask for biometrics depending on the case and location.
Step 4: Submit your application
Most applications are lodged online through ImmiAccount. The exact filing sequence matters. Skilled migration often starts with an Expression of Interest rather than a full visa application. State-nominated visas add a nomination step.
Partner and student visas move straight into evidence-heavy applications. If you are applying for a Student visa, update your budget – the current application charge is AUD 2,000, not the old AUD 454 or AUD 1,600 figures you still see online.
Step 5: Complete health checks and biometrics
Do not leave these until the last minute. Health exams, chest imaging, and follow-up requests can add time. Biometrics, when requested, also require an appointment at an approved collection point. Many delays happen because applicants treat this stage as a formality.
Step 6: Receive your visa and make the move
Once the visa is granted, the practical move begins. That means arranging flights, short-term housing, health cover, banking, school records if relevant, and a plan for the first tax year that spans two countries. That last step is where many Americans lose time and money.
Where US expats love living in Australia
Where you settle will shape your budget more than almost anything else. Rent is the biggest variable, and the rent crisis in Australia has made competitive markets even tougher in major cities.
The rent figures below are planning ranges for one-bedroom city living, while the total monthly budget figures are practical solo-expat estimates rather than official government caps.
Sydney
Sydney is still the default choice for many newcomers because it combines major employers, beaches, and a large international community. Current city rent planning is roughly AUD 2,800–3,800+ per month for a one-bedroom place in or near central areas, and a realistic solo monthly budget often lands around AUD 4,900–6,600.
The upsides are obvious – deep job markets, strong transport links, and iconic outdoor living. The tradeoff is cost. For many movers, the real cost of living in Sydney vs Melbourne comes down to whether Sydney’s salary upside offsets its housing pressure.
Melbourne
Melbourne appeals to Americans who want a big city without Sydney’s price tag. A one-bedroom city rent range is often around AUD 2,200–3,000 per month, and a practical solo monthly budget commonly falls around AUD 4,200–5,500.
It is usually the best fit for people who care about arts, food, walkability, and public transport. The climate is less predictable, but many expats find the day-to-day rhythm easier than Sydney’s pace.
Brisbane
Brisbane has become a serious relocation contender, especially for families and remote workers. Current rent planning is roughly AUD 2,500–3,000 per month, and a realistic solo budget often lands around AUD 4,100–5,200.
The city feels more relaxed than Sydney or Melbourne, but it is no longer the bargain some older guides suggest. It suits Americans who want warm weather, a slower pace, and access to the Queensland lifestyle without giving up urban infrastructure.
Perth
Perth works well for people tied to Western Australia's industries or anyone who wants more space and a coastal lifestyle. Current rent planning is roughly AUD 2,500–3,100 per month, and a practical solo budget often lands around AUD 4,100–5,300.
Its biggest drawback is distance. Flights to the eastern states and back to the US can be long and expensive. Still, many expats value the cleaner pace, beaches, and lower density.
Adelaide
Adelaide is often the best-value capital city for Americans who want a quieter landing. Current rent planning is roughly AUD 2,200–2,700 per month, and a practical solo budget often lands around AUD 3,800–4,900.
It tends to suit retirees, families, and people who care more about affordability than headline nightlife. The tradeoff is a smaller job market, so this city works best when the role or income source is already secured.
Employment opportunities in Australia
Americans can absolutely work in Australia, but only if the visa gives them that right. A strong résumé is not enough by itself.
US degrees in Australia: are they valid?
Usually, yes – but not automatically for every profession. US degrees are often well understood in Australian hiring, especially in IT, engineering, finance, academia, and many corporate roles. Regulated professions can be more complex. Teaching, healthcare, law, and certain licensed trades may require local registration, bridging requirements, or a formal assessment authority.
That is why a US citizen moving into Australia on a skilled pathway should verify both the visa occupation code and the local licensing rules. Those are related, but they are not the same thing.
Job eligibility under different visas
Moving to Australia is about more than getting permission to enter. You also need clear work rights after arrival. A subclass 189 holder can generally live and work anywhere. A 190 holder is expected to support the state or territory that nominated them.
A 482 holder works under the approved sponsored role. Student visa holders usually work within the 48-hour-per-fortnight limit when classes are in session.
As of March 2026, Australia’s national minimum wage is AUD 24.95 per hour, which took effect on July 1, 2025. That helps explain why many Americans view Australia as a strong wage market, even though housing and everyday costs can be high.
Australian educational system
Moving to Australia for higher education gives Americans access to well-known public universities, strong vocational programs, and a study system built around CRICOS registration and formal visa compliance.
The big practical updates are straightforward. The Student visa application charge is AUD 2,000. You need a valid Confirmation of Enrolment. You must maintain Private health insurance (OSHC/OVHC) in the correct form for the visa – for students, that means OSHC. You must also meet the current Genuine Student standard and show financial capacity where required.
If you plan to study first and settle later, be realistic about the economics. Tuition, rent, and the visa charge add up quickly. The study route can still be worthwhile, but it works best when the course has a clear career outcome in Australia.
Medicare vs Private health
Healthcare is one of the biggest quality-of-life differences Americans notice after the move. But not every visa holder gets the same access.
As a permanent resident, you can generally enroll in Medicare. That gives you access to Australia’s public health system, although it does not mean every service is free, and wait times still vary. Some temporary residents can also access Medicare in limited cases, but many cannot.
That is why private cover matters. Most temporary visas, including student visas and many employer-sponsored visas with condition 8501, require you to maintain adequate private health insurance. In practice, students use OSHC, and many other temporary residents use Overseas Visitors Health Cover.
Higher-income residents should also watch the Medicare Levy Surcharge. If you earn above the surcharge thresholds and do not carry appropriate private hospital cover, you can pay extra tax. There is also a Medicare levy surcharge exemption concept that people often confuse with the ordinary Medicare levy exemption.
The simpler rule is this: if you are not entitled to Medicare benefits and hold the right exemption status, you may avoid the ordinary Medicare levy, but the surcharge rules for higher earners are separate and depend on your cover and income.
Taxation and banking: two peas in a pod
This is the section most relocation guides oversimplify. Moving to Australia changes how you bank, invest, and report income, but it does not switch off your US filing duties.
Steps to owning an Australian bank account
Opening an Australian bank account for non-residents is usually possible before or shortly after arrival, but the bank will still need identity verification and tax residency information. Expect document checks, anti-money-laundering screening, and questions about where you are a tax resident.
Australia also uses identity frameworks that Americans may hear described as a 100-point ID check. In practice, banks and other institutions want enough documentary proof to verify who you are, where you live, and how your tax residency should be recorded. As a US taxpayer, you may also be asked for your US Tax Identification Number because Australian financial institutions have reporting obligations under international tax-sharing rules.
Currency exchange and cost comparison
There is no single “best” way to move money. Bank wires are simple but may have higher spreads. Specialist transfer platforms can be cheaper in exchange costs. ATM fees depend on both your home bank and the Australian network you use.
The main planning point is not the headline fee. It is the full conversion cost once you include exchange spread, transfer charges, and the timing of any large move. If you are bringing substantial savings, compare providers carefully and keep records of the transfer trail for future tax and source-of-funds questions.
Your tax obligations between the US & Australia
Australia taxes residents on worldwide income. Residency is determined under Australian domestic rules – not by your visa label alone. If you become an Australian tax resident, the 2025–26 resident tax rates are:
| Taxable income (AUD) | Tax rate |
|---|---|
| 0 – 18,200 | 0% |
| 18,201 – 45,000 | 16% |
| 45,001 – 135,000 | 30% |
| 135,001 – 190,000 | 37% |
| 190,001+ | 45% |
The Medicare levy is generally 2% on top of the income tax above. However, certain individuals may qualify for a Medicare levy exemption if they are not eligible for Medicare benefits.
Australia uses a July 1 – June 30 tax year, which is different from the US calendar-year system. This timing difference often creates a split-year tax situation for Americans who move mid-year.
Upcoming tax rate changes
The government has announced further cuts to the 16% bracket – to 15% from July 1, 2026, and 14% from July 1, 2027 – but those changes still need legislation before they become law.
These adjustments are part of the revised Stage 3 tax reforms designed to gradually lower the tax burden for lower- and middle-income earners.
Nonresidents are taxed only on Australian-source income and do not receive the AUD 18,200 tax-free threshold.
Australian tax filing deadlines
Australia’s self-lodgment due date for most individuals is October 31, after the tax year ends on June 30.
However, timing can change depending on how you file.
- Self-lodgment: October 31
- Registered tax agent: extended deadlines may apply
- ATO lodgment program: extension applies only if you are listed with the agent before October 31
For many Americans moving to Australia from the United States, coordinating the ATO deadline with the US IRS filing calendar becomes one of the first cross-border compliance challenges.
US tax obligations after moving to Australia
The US side continues too. A US citizen or Green Card holder files Form 1040 every year and reports worldwide income – even after relocating abroad.
That means moving to Australia does not end your IRS reporting obligations.
Two major tools help prevent double taxation:
- Foreign Earned Income Exclusion (FEIE) – claimed using Form 2555
- Foreign Tax Credit (FTC) – claimed using Form 1116
Many Americans in Australia find the foreign tax credit useful because Australian income tax rates are often high, but the right choice between the FTC, the FEIE, or a combination depends on your income, credits, and filing goals.
In some cases, using the FEIE can reduce eligibility for certain credits or complicate retirement contributions, which is why the decision should be modeled before filing.
US–Australia tax treaty considerations
The US–Australia tax treaty helps allocate taxing rights between the two countries and reduces the risk of double taxation.
However, the treaty does not eliminate US filing requirements. Americans abroad must still file US tax returns annually.
Superannuation and US taxes
Superannuation is Australia’s retirement savings system, but the US tax treatment is not always straightforward.
Issues can include:
- foreign trust classification
- PFIC reporting for underlying investments
- reporting requirements for contributions or distributions
If you have Australian retirement savings, read our guide on Australian superannuation and US taxes. Superannuation fund taxation for US citizens is a specialist issue, and generic relocation articles often underestimate its complexity.
Additional US reporting requirements
Even if no US tax is owed, Americans abroad may still have to report foreign financial accounts.
Two common reporting regimes include:
- FBAR (FinCEN Form 114) – required if total foreign financial accounts exceed USD 10,000 at any point during the year
- FATCA reporting (Form 8938) – applies when foreign assets exceed certain thresholds
Form 8938 does not replace FBAR. In many situations, both forms are required.
State tax issues many expats overlook
If you left a high-tax US state, do not assume the state tax obligation disappears automatically.
Some states aggressively examine residency ties, such as:
- property ownership
- voter registration
- driver’s license status
- time spent in the state
- family location
Some states – especially high-tax states with detailed residency tests and audit guidance, such as California and New York – closely examine continuing ties after you move abroad. Review your former state’s residency rules before assuming the filing obligation ended.
Catching up on missed filings
If you have already moved to Australia and missed prior US filings, there may still be a solution.
The IRS offers the Streamlined Filing Compliance Procedures for certain taxpayers who failed to file required international forms but whose non-compliance was non-willful.
This program can allow eligible taxpayers to:
- file the last 3 years of tax returns
- file 6 years of FBARs
- avoid certain failure-to-file penalties
For Americans already living abroad, this program is often the safest way to bring filings back into compliance before opening new financial accounts or applying for visas, mortgages, or investment accounts.
Transferring assets and savings
When moving to Australia from the United States, timing matters. Large cash transfers are the easy part. The harder part is how each country treats brokerage accounts, retirement savings, managed funds, and local investment products after the move.
For US taxpayers, foreign pooled investments can create PFIC issues. For Australians, residency can change how future gains are taxed. Superannuation adds another layer. This is one area where getting the structure right early can prevent years of cleanup work later.
Tips for a smooth transition
Moving to Australia is exciting, but the first month can feel more administrative than adventurous.
- Housing is the biggest shock for many arrivals. In tight rental markets, it is normal to compete with many other applicants, provide identity documents, and show rental references. Short-term accommodation for the first 4–8 weeks often makes the move much easier while you inspect neighborhoods in person.
- Utilities and mobile service are usually straightforward once you have an address. The bigger challenge is sequencing. Get your bank account, local SIM, and temporary accommodation sorted before you worry about buying furniture.
-
Driving is another adjustment. Driving in Australia, on a US license, the rules are state-based, not national. Driving rules are state-based, and the deadline to convert a US license depends on where you live and whether you are a temporary or permanent resident.
Check the road authority for your state or territory before you arrive, rather than relying on a single national rule. New South Wales has tightened rules for temporary residents, and other states have their own conversion deadlines or residency-based triggers. Check the state road authority before you arrive.
- The everyday cultural shift is real, too. Australians can sound more informal than Americans, humor is often dry, and left-side driving takes time. In an emergency, the Emergency number 000 is the Australian equivalent of 911.
- You should also keep a practical document folder ready: passport, visa grant notice, health insurance details, tax numbers, school or vaccination records if needed, and digital copies of everything important. That small habit saves a lot of friction in the first weeks.
Moving to Australia: what about your US taxes?
If you are moving to Australia, the visa is only half the process. The other half is making sure your IRS filing, foreign account reporting, and state-residency position are aligned with the move.
Taxes for Expats helps Americans abroad file accurately, claim the right exclusions or credits, and avoid common mistakes around foreign accounts, superannuation, and dual-country timing issues. If you want a practical filing roadmap before the move, this is the right moment to build one.
FAQs on moving to Australia
It depends on the pathway. Skilled migration is structured but competitive because of age limits, points, occupation lists, and invitation rounds. Partner visas avoid the skills-test route but require strong relationship evidence. Parent visas are genuine options, but wait times can be extremely long.
Yes. Americans can live in Australia permanently if they qualify for permanent residency through a visa such as subclass 189, 190, 186, 801, 100, 143, or 858. Permanent residence can later lead to Australian citizenship by conferral if the residence requirements are met.
That is not a reliable plan. The Electronic Travel Authority is a visitor permission for short stays, usually up to three months at a time. It is not designed for living in Australia; it does not allow work, and repeated entries can draw scrutiny because visitor status is meant for genuine temporary stays.
Sometimes, but not on the same terms as locals. Foreign persons generally need approval before buying residential property. There is also a temporary ban, from April 1, 2025, through March 31, 2027, on foreign persons, including temporary residents, buying established dwellings unless an exception applies. Permanent residents and citizens are treated differently.
Yes, but only with the right work rights. A skilled permanent visa allows broad work rights. A subclass 482 ties you to the approved employer and role. Student visa work is limited during study periods. Visitor status does not authorize employment.
For short travel, the ETA is the simplest, but it is only for visiting. For relocation, there is no universal “easy” visa. The best route depends on whether you qualify through work, family, study, or exceptional achievement.
That depends on the visa and the city. A student visa application alone is AUD 2,000, while skilled and partner categories cost several thousand dollars more. Beyond visa fees, most solo movers should budget for flights, temporary housing, rental bond, furnishing, and several months of living costs.
Yes. A US citizen living in Australia still files a US federal return and may need FBAR and Form 8938 reporting too. Relief usually comes through the FEIE, the foreign tax credit, and treaty coordination rather than by stopping filing.
This is one of the most technical cross-border issues. Australia treats superannuation as a retirement system, but the US treatment can be more complicated. Review our related guide before you make contribution, rollover, or withdrawal decisions.
The main requirements depend on the visa, but usually include a valid passport, a visa that matches your purpose, health and character clearance, and any supporting evidence required for work, study, or family sponsorship. For skilled migration, age, occupation, skills assessment, and invitation rules are often the deciding factors.
Usually not. A US license can often be used temporarily, but long-term residents usually need to obtain a state or territory license under local rules. The deadline depends on where you live in Australia.
Do not ignore it. Many Americans abroad can catch up through the Streamlined Filing Compliance Procedures if they meet the eligibility rules. Fixing it early is usually much easier than waiting until a bank, visa application, or property purchase triggers deeper document checks.