Many Australian business owners with a U.S. S corp struggle to find a provider that actually understands cross-border filing, not just domestic U.S. clients. An S corporation is a U.S. tax election, not an Australian one. This guide reviews providers that may support Form 1120-S preparation and related filings. It is not advice on your Australian tax residency or ATO reporting obligations.
Below, we rank the providers worth considering, explain the comparison criteria, outline core filing obligations for 2026, and list the questions you should ask before signing an engagement letter.
Key Takeaways
- Match your filing service to shareholder residency, state nexus, payroll, and bookkeeping needs
- U.S. S corps file Form 1120-S and K-1s; Australian shareholders face separate reporting duties
- Confirm non-U.S. shareholder experience and secure cross-border document handling before you engage
- VJM Global can suit cross-border owners once you confirm S corp filing is in scope
Overview of S Corporation Tax Filing for Australian Owners
An S corporation isn't a separate legal entity type. It's a tax election that lets a qualifying corporation pass income, losses, deductions, and credits through to shareholders, who report those amounts on their own returns. This happens whether or not cash actually gets distributed.
That pass-through status doesn't remove the corporation's own filing duty. Once the IRS accepts Form 2553 and the election stays in effect, an annual return is still required.
What to verify for the 2025 tax year, filed in 2026:
- Form 1120-S, the annual corporate return
- Schedule K-1 for each shareholder, reporting their share of income and deductions
- Payroll filings if shareholder-employees take wages (Forms 941, 940)
- Information returns such as 1099s, plus Schedules K-2/K-3 where international items apply
- Estimated tax payments, both at the shareholder level and occasionally at the entity level
- State or local filings, depending on where the business operates
Why Australian Owners Need Extra Screening
Here's the part that trips up a lot of Australian founders: the IRS is strict about who can actually hold S corp shares.
According to the IRS Form 2553 instructions, an S corporation generally cannot have nonresident alien shareholders, with a narrow exception involving electing small business trusts. Your U.S. tax classification (resident vs. nonresident alien) depends on factors like the substantial presence test, not your passport.
Before hiring anyone, check whether the provider can handle:
- Nonresident shareholder classification questions
- U.S. tax identification requirements (SSN or ITIN)
- Foreign exchange record-keeping between AUD and USD
- Coordination with your Australian accountant on residency and foreign income reporting
Compare providers on cross-border suitability and real service depth, not brand recognition or an advertised entry-level price. A cheap domestic package that can't handle a foreign shareholder is worthless to you.
Top S Corp Tax Filing Services for 2026
We assessed each provider against nine criteria:
- Direct S corp capability, Form 1120-S support, and Schedule K-1 preparation
- Cross-border experience and fit for Australian-based clients
- State filing coverage, bookkeeping and payroll integration
- Professional access and pricing transparency
Verify current details directly with each provider before engaging, since packages and pricing shift.
| Provider | Service Model | S Corp Filing Support | Cross-Border Suitability | Year-Round Support | Best Fit |
|---|---|---|---|---|---|
| VJM Global | Firm-led, dedicated team | Entity formation plus Form 1120-S listed; confirm scope | Serves 500+ American business owners and 250+ Australian businesses | Yes | Founders needing coordinated accounting and compliance |
| 1-800Accountant | Dedicated-accountant model | Explicitly listed, with K-1 review service | Not publicly specified; verify directly | Yes | Owners wanting more than DIY software |
| Block Advisors | In-person or virtual | Dedicated S-corp page with professional tier | Not publicly specified; verify directly | Yes | Owners wanting local or virtual human support |
| TurboTax Business / Expert Full Service | Software or expert-prepared | Business software and expert tiers support 1120-S | Not publicly confirmed for foreign owners | Limited outside tax season | Organised businesses with straightforward records |
| Padgett | Local advisor network | Varies by office; several offices list 1120-S | Varies by office; confirm locally | Yes | Owners wanting an ongoing local advisor relationship |
VJM Global
VJM Global operates as a professional services firm with U.S. entity formation and tax capability covering LLCs, C corporations, and S corporations. Its documented U.S. service scope lists Form 1120-S among the corporate returns it files, alongside EIN registration, registered agent coordination, and payroll setup using Forms W-4, W-2, 941, and 1099-NEC.
The firm has served 500+ American business owners and 250+ Australian businesses, with a 100+ person team spanning multiple industries, including technology, financial services, and automotive. Its multi-state tax FAQ notes that the team includes CPAs.
Schedule K-1 preparation isn't separately documented in its current service descriptions, so Australian founders should confirm this directly before assuming it's included.
Why this might suit Australian founders:
- Experience coordinating accounting work across multiple jurisdictions, not just the U.S.
- Multi-state tax handling across all 50 states, including California and New York nexus work
- Remote engagement built on encrypted document transfer, secure cloud storage, and role-based access controls
- A straightforward engagement process: share requirements, receive a customised plan, then begin work
Pricing is quoted per state and entity structure rather than a flat advertised fee, so get a written quote before committing. VJM Global doesn't claim a physical Australian office, and its U.S. compliance work is separate from any Australian tax advice you still need from an ATO-registered agent.
If you're weighing whether your S corp and cross-border filing needs fit this model, ask VJM Global directly what their current U.S. compliance scope includes for your situation.
1-800Accountant
1-800Accountant's business tax pages explicitly list Form 1120-S, federal filing, and applicable state filings. Its dedicated Schedule K-1 service mentions reviewing K-1s generated from 1120-S returns and coordinating between the business and owner-level filings.
Three posted packages are relevant here: Tax Advisory at roughly US$209/month, Starter at US$299/month, and Business Complete at US$469/month (all billed annually). Starter covers one entity's annual filing, including 1120-S, plus bookkeeping software. Business Complete adds full-service bookkeeping and payroll handling.
International or nonresident shareholder acceptance isn't publicly specified, so Australian owners need to confirm this before signing up. This model suits owners who want a dedicated accountant without full in-person meetings, provided the provider confirms it can handle your shareholder profile.
Block Advisors
Block Advisors runs a dedicated S-corp page advertising professional preparation starting at US$280, with software-only filing from US$115. Professional service includes in-person or virtual meetings, year-round support, and a profit-and-loss statement; the software tier bundles one free state return.
Watch for pricing inconsistency: the general tax-pro page quotes a different structure (US$250 plus US$75 per state), so don't assume that applies to the S-corp-specific package.
Bookkeeping and payroll are separate add-ons, not bundled into the preparation fee. International or nonresident acceptance isn't confirmed publicly. This fits owners who want flexible delivery (drop-off, virtual, or in-person) but who need to verify cross-border handling before relying on it.
TurboTax Business and TurboTax Expert Full Service
TurboTax offers three relevant tiers: Business Desktop software (Windows-only, starting around US$190 for five federal e-files), Expert Assist Business (expert review alongside self-preparation), and Expert Full Service Business (experts prepare and file the return).
Both expert tiers cap out at five state filings, which matters if your S corp has nexus in more states than that. A general Expert Full Service promotion excludes S-corp returns, but that's a different, separate product from the dedicated Expert Full Service Business offering, so don't rule it out based on that promo alone.
This option suits organised filers with straightforward, single-state records. It carries more risk for anyone with nonresident shareholders, multi-state operations, or payroll complications, since foreign-owner support isn't publicly confirmed.
Padgett (or a Comparable Small-Business Advisory Network)
Padgett operates as a network of independently owned offices. Individual locations, such as Padgett Dallas and Padgett Northshore, explicitly list S-corp preparation and Form 1120-S on their service pages, alongside bookkeeping, accounting, and payroll support.
Because offices are independently run, service quality, pricing, and international capability vary by location. National payroll services cover tax remittance, W-2s, W-3s, and 1099s. No nationwide S-corp price is published, so a local quote is essential.
This model suits owners who want an ongoing, local human relationship rather than a centralised call centre. Confirm with the specific office whether they've handled nonresident shareholders or Australian coordination before signing on.
S Corporation Filing Requirements and Selection Factors for Australian Owners
Filing an S corp return isn't a once-a-year scramble if you set it up correctly. The annual workflow typically runs:
- Maintain tax-ready books throughout the year, not just at filing time
- Classify shareholder compensation separately from distributions
- Prepare Form 1120-S with accurate income, deduction, and credit figures
- Issue Schedule K-1s to every shareholder
- Complete state filings wherever nexus exists
- Retain supporting records for IRS and, where relevant, ATO scrutiny
2026 Deadlines to Know
For calendar-year 2025 returns, the IRS Publication 509 confirms Form 1120-S and shareholder K-1s are due March 16, 2026 (March 15 falls on a Sunday). A Form 7004 extension pushes the filing deadline to September 15, 2026.
An extension to file is not an extension to pay. Any tax owed is generally still due by the original March deadline, regardless of whether you've filed an extension.
Issues That Need Specialist Review
- Reasonable compensation: shareholder-employees must receive fair wages before taking non-wage distributions, or the IRS can reclassify those distributions as wages
- Shareholder basis and distributions: tracked separately from book profit
- Passive income limits: can jeopardise the S election if mismanaged
- Prior C corp history: built-in gains tax can apply if the company converted from a C corp
Cross-Border Questions Before You Sign
- Does the provider handle nonresident shareholder classification?
- Can they assist with ITIN applications for shareholders without an SSN?
- Do they maintain foreign currency conversion records for AUD/USD transactions?
- Will they coordinate directly with your Australian accountant?
Also confirm data-security practices, encrypted document transfer, preparer credentials, e-file capability, and who actually signs the return. As an example, California requires Form 100S for any entity doing business or earning California-source income, taxed at 1.5% with an US$800 minimum franchise tax, according to California's FTB. Rules like this differ by state, so don't assume one filing covers everything.
Finally, don't pick a provider purely on the lowest advertised fee. Request a written quote that separates federal returns, state returns, K-1 preparation, payroll, bookkeeping, and any foreign-owner surcharge.
How We Chose the Best S Corp Tax Filing Services
We evaluated providers for genuine S Corp filing capability, not generic individual tax prep repackaged under a business label.
Comparison criteria included:
- Software-only filing vs. expert review vs. full-service preparation
- Recurring accounting, payroll, and state compliance support
- Tax planning and audit or notice assistance
- Transparent pricing with clearly itemised add-ons
Each criterion ties to a practical outcome. A provider that handles multi-state filings reduces the risk of incomplete or missed filings. One that offers year-round support improves deadline control. Proper reasonable-compensation review avoids unsupported wage positions that invite IRS scrutiny.
Common mistakes we flagged:
- Assuming an individual tax product (built for Form 1040) can handle Form 1120-S
- Overlooking state filing obligations entirely
- Failing to disclose nonresident ownership upfront, which can derail the engagement mid-filing
- Comparing headline prices without checking what's excluded
All prices, claims, and eligibility details referenced here should be confirmed directly with providers, since packages and terms shift between tax seasons.
Conclusion
There's no single "best" S corp filing service for every Australian owner. The right choice depends on a few practical factors:
- Ownership structure and shareholder residency
- U.S. states where you operate
- Payroll activity and the bookkeeping systems you already use
- How much ongoing cross-border advice you need
U.S. S corp compliance and Australian tax obligations are separate questions. They often need coordinated advice from qualified professionals in both countries, not one filer handling everything alone.
Before you sign, compare written scopes of work line by line. If VJM Global's U.S. compliance and accounting services look like a fit, ask how the team would handle your specific setup.
Frequently Asked Questions
What is the best way to file an S corporation tax return?
It depends on complexity. DIY software suits simple, single-state records; expert-assisted filing adds review for trickier situations; full-service preparation suits multi-state or cross-border ownership where mistakes get expensive.
How much does it cost to file an S corporation tax return?
Pricing ranges from about US$115 for basic software to several hundred dollars a month for full-service packages. Get separate quotes for federal prep, state returns, K-1s, and international-owner work.
What form does an S corporation file?
An S corporation generally files Form 1120-S and issues Schedule K-1s to shareholders. Depending on activity, employment, information, state, and local filings may also apply.
What is the deadline for an S corporation tax return in 2026?
For calendar-year 2025 returns, the deadline is March 16, 2026. A Form 7004 extension moves the filing date to September 15, 2026, but doesn't extend the time to pay any tax owed.
Can an Australian resident own shares in a U.S. S corporation?
Generally no. Nonresident aliens cannot own S corp shares under U.S. tax rules, aside from a narrow trust exception. Confirm your IRS residency status and get coordinated U.S. and Australian advice before structuring ownership.
Do S corporations need to file state tax returns?
Often, yes. State obligations depend on incorporation, business activity, payroll, customers, and property in that state. Confirm nexus and whether the state even recognises the federal S election, since not all states do.
