January 2026: Key Tax Dates & Smart Tips for Aussie Small Businesses
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By Leonie Martin
Posted On January 1, 2026
January has a reputation for being a “quiet” month — but for business owners, it’s often one of the most important months of the year.
Cash flow can feel tight, clients are slow to return, inboxes start filling again, and compliance deadlines arrive sooner than expected. What you do (or don’t do) in January sets the tone for the rest of the year.
Here’s your simple, practical guide to the key January 2026 business dates — plus what Australian business owners should be focusing on right now to start the year with clarity, not chaos.
Why January Matters for Your Business

January isn’t just about easing back into work. It’s a transition month — from shutdown mode to full operational mode — and small missteps can ripple through the rest of the quarter.
Here’s why getting January right makes such a difference:
1. January is one of the slowest cash-flow months of the year
Many businesses don’t see normal payment patterns return until late January or February. Without visibility, cash stress can build quickly.
2. December obligations don’t disappear.
December payroll, BAS, super and expenses all land in January. If December wasn’t wrapped up cleanly, January becomes a catch-up month.
3. Super deadlines matter.
The December quarter superannuation deadline falls in January. Missing it can trigger penalties and lost deductions.
4. The business runs on half-pace.
School holidays, staggered returns and slower decision-making mean progress is uneven. That makes clarity more important than speed — especially around cash flow and priorities..
5. January habits shape the year.
How you manage invoicing, follow-ups, forecasting and systems in January often becomes the default for the rest of the year.
Important Deadlines for January 2026
Below are the key dates you need to mark in your calendar:
7 January – December Payroll Tax
Lodge and pay on time to avoid penalties and keep your payroll records up to date.
21 January – BAS / IAS for December
Make sure your monthly BAS or IAS is submitted to the ATO to stay compliant.
28 January – December Quarter Superannuation
Superannuation contributions for employees for the October–December quarter must reach the fund by 28 January 2026. 🚩 Missing this deadline can trigger Super Guarantee Charge (SGC) penalties and makes the contribution non-deductible.
Late January — Back-to-Business Reality Check
While not a formal deadline, late January is when:
- Clients expect follow-ups
- Payments restart (slowly)
- Suppliers resume normal terms
This is the moment where visibility over cash flow and outstanding invoices really matters.
Want help making sense of January beyond deadlines? Read our guide to starting the year with clarity and control.
What You Should Be Doing in January (Besides Meeting Deadlines)
January isn’t about pushing harder — it’s about resetting properly.
These are the smart moves that help business owners regain control early.
Get December fully reconciled
Before you look forward, make sure December is clean:
- Reconcile bank accounts
- Clear suspense items
- Review outstanding invoices and bills
A clean December makes January reporting faster and more accurate..
Review January–March cash flow
January is the time to build (or update) a 3-month cash-flow forecast.
Focus on:
- Expected receipts (realistic, not optimistic)
- Known expenses and commitments
- Super and tax payments already locked in
Knowing what’s coming reduces stress and prevents reactive decisions.
Restart invoicing and follow-ups early
Many businesses wait until mid-January to restart invoicing — and that delay compounds cash-flow pressure.
✔️ Send invoices early
✔️ Turn invoice reminders back on
✔️ Follow up outstanding December invoices.
Review pricing, retainers and scope creep
January is a natural pause point to ask:
- Are our prices still right?
- Are we under-charging for complexity?
- Have retainers drifted out of alignment?
Small adjustments early in the year have a big cumulative impact.
Check payroll, leave balances and returns
With staff returning from leave:
- Ensure payroll settings are aligned for the year ahead
- Confirm leave balances are correct
- Check any manual adjustments from December
Reset systems and automations
January is ideal for tightening systems before work ramps up:
- Invoice reminders
- Bank rules
- Recurring bills
- Automated expense coding
- Payroll items and super links
Small system improvements now save hours later.
January Risk, Cash Flow & Readiness Check
January is a reset month — but it’s also a risk month.
Issues that were “parked” in December tend to surface now, often at the same time cash flow is slower and momentum hasn’t fully returned.
Being proactive in January isn’t about doing more. It’s about removing friction early so small problems don’t turn into ongoing distractions.
Below are the key risk areas business owners should consciously check as the year begins.
Cash Flow Risk: The January squeeze
January is one of the most common months for unexpected cash-flow pressure.
Why it happens:
- Clients return slowly from holidays
- Invoices aren’t sent or followed up promptly
- December work is billed late
- Fixed costs resume immediately
What to check now:
- Outstanding invoices from November and December
- Whether invoice reminders are turned back on
- Expected cash inflows for the next 4–8 weeks
- Large January outgoings (super, BAS, rent, payroll)
Small delays in January compound quickly. Visibility is the difference between control and stress.
Compliance Risk: Deadlines don’t ease back in
While businesses ease back into work, compliance deadlines arrive in full.
Key January pressure points:
- December BAS or IAS (monthly reporters)
- December quarter superannuation
- Payroll tax obligations (where applicable)
Common January mistakes:
- Assuming there’s “more time”
- Lodging without fully reconciled data
- Super payments processed too late to clear funds on time
- Fixing December issues under deadline pressure
January compliance errors tend to linger, often resurfacing at EOFY or during audits.
Payroll & Super Risk: December adjustments catching up
December payroll often includes:
- Leave taken in advance
- Public holidays
- Shutdown periods
- Manual adjustments
If these aren’t reviewed in January, problems emerge later.
What to review:
- Leave balances after shutdown
- Correct classification of leave vs unpaid time
- Super calculated on correct earnings
- Any manual payroll overrides made in December
Payroll errors are far easier to fix now than months later.
Reporting Risk: Making decisions on incomplete numbers
Many businesses start the year making decisions before December is finalised.
That creates risk because:
- Profit reports are incomplete
- GST and expenses aren’t fully captured
- Cash flow projections are inaccurate
Before relying on reports, confirm:
- December bank accounts are reconciled
- Outstanding bills and income are recorded
- Payroll and super are complete
- GST has been reviewed, not estimated
Good decisions require clean data especially early in the year.
Systems & Process Risk: Carrying inefficiencies forward
January is when inefficiencies quietly lock in for the year.
Common system risks:
- Invoice reminders left off
- Bank rules not updated
- Recurring invoices not reviewed
- Subscriptions and tools quietly renewing
- Manual workarounds becoming habit
If systems feel messy in January, they rarely improve on their own.
Readiness Check: How to protect your January
A strong January doesn’t require perfection — just intention.
Focus on:
- Closing December properly before rushing ahead
- Restoring visibility over cash flow
- Clearing compliance obligations early
- Resetting systems and automations
- Creating a realistic view of Q1
When January is organised, the rest of the year feels lighter.
Why HelloLedger Emphasises January Deadlines
January feels quieter — but compliance risk is actually higher.
Here’s what we see when January slips:
🚩 ATO penalties and interest can stack up quickly
Late BAS and super issues often snowball because businesses don’t feel “back” yet.
🚩 Cash-flow stress escalates
Uninvoiced work + slow payers + tax payments = pressure.
🚩 Fixing errors costs more later
Payroll, super and GST errors are easier to correct now than in March or June.
🚩 The year starts reactive instead of planned
When January is messy, the rest of the year often follows.
Sample Checklist for January 2026
Use this as your January reset guide:
- Lodge December BAS / IAS by 21 January
- Pay December quarter super by 28 January
- Confirm payroll tax obligations
- Reconcile December accounts
- Restart invoicing and reminders
- Review January–March cash flow
- Check payroll and leave balances
- Reset accounting automations
- Review pricing and scope
- Set financial priorities for Q1
Ticking these off will set you up for a smoother December, with fewer surprises and more headspace to plan for 2026.
Need Help Starting 2026 the Right Way??
January is one of the most powerful months to get right — and one of the easiest to underestimate.
At HelloLedger, we help business owners:
- regain cash-flow clarity after the break
- stay on top of BAS, super and payroll
- clean up December properly
- automate the admin that drains time
- start the year organised, confident and in control
Whether you need a January reset, ongoing support, or a clearer plan for the year ahead, we’re here to helpecember is one of the most important months to get right and one of the easiest months to fall behind.
If you want a smoother, clearer start to 2026, we’re here to take the pressure off.
At HelloLedger, we help small business owners:
- close out the year cleanly
- get ahead on payroll, BAS and bookkeeping
- improve cash flow visibility heading into January
- automate the admin that drains your time
- start the new year organised, confident and in control
Whether you need a once-off tidy-up or ongoing support, our team is here to make the financial side of your business feel lighter and more manageable.
Book a discovery call and let’s make 2026 feel lighter from the very start.
“HelloLedger is an amazing financial service, my business has grown so much in the last two years, every aspect that can become tedious is so easily
taken care of, I would recommend their services to anyone looking for a totally fresh, and customisable
approach to business and financial assistance”
-Josh Phillips
Ready to stop guessing and start growing?
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