December 2025 Business Calendar: Key Dates and Tips for Australian Small Business Owners

December means the year is wrapping up — but for many small businesses, the work doesn’t stop. It’s the final push: end-of-year payroll, super, bookkeeping, and preparing for a fresh start in January.

Get ahead this month and you’ll start 2026 calm, compliant and ready to grow.

Here’s your December calendar and practical tips to finish the year strong.

Key Dates for December 2025:

📌 Stay organised and ahead of your deadlines with our handy key dates..

📅  7 December 2025 📌 Payroll Tax – Monthly Lodgement (November wages)

If you’re registered for payroll tax in your state/territory, your return and payment for November wages are due.

📅  22 December 2025📌 Monthly BAS Due (November)

Submit your Business Activity Statement (BAS) and Instalment Activity Statement (IAS) on time — it keeps compliance tight and cash flow predictable.

📅  25 December 2025📌 Christmas Day

A reminder: your business may be closing, so finalise any outstanding payments or accounting tasks before the break!

📅  31 December 2025📌 End of calendar year wrap-up

Last chance this year to reconcile accounts, finalise payables/receivables, and set the scene for 2026. But we hope you've already done this and are enjoying the holidays!

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Real-World Tips for Staying Ahead of December Deadlines

With deadlines on the calendar, here are some practical moves you can take to ensure you’re not scrambling after the holidays.

💡Super & Payroll — don’t let holiday mode derail you

Ensure all superannuation contributions and salary-related payments are scheduled and processed before staff begin holiday leave. This reduces the risk of late super, SG issues or holiday-pay confusion.

💡Reconcile your books now

Clear out unpaid invoices, reconcile bank feeds, check supplier balances — give yourself a clean ledger before the new year.

💡 Forecast cash flow for January–March 2026

Holiday downtime + slow receivables = cash-flow squeeze. Planning ahead helps smooth out those dips.

💡Audit subscriptions and recurring costs

Unused software, tools or licence fees — now’s a good time to cancel or renegotiate them so you start 2026 leaner..

💡Communicate your holiday shutdown or limited operations to clients & suppliers

Set expectations early about December/January operations to avoid confusion or delayed payments.

💡Review business structure & pricing (if you’ve grown this year)

If 2025 brought growth or changes in service or scale — December can be a good checkpoint to assess whether your current structure, pricing or processes still fit.

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How HelloLedger Can Help You Finish the Year Strong

If December feels like a sprint — we’ve got your back. HelloLedger helps small business owners:

• Stay compliant with payroll tax, BAS and super

• Clean up bookkeeping and reconcile accounts before the year-end

• Forecast cash flow and prepare for the holiday period

• Automate invoicing, expenses and reporting so January isn’t a scramble

• Review business structure and pricing to ensure 2026 is optimally positioned

Book a discovery call today to get the peace of mind that your numbers are sorted — so you can finish 2025 with confidence and start 2026 ready to grow.

Next steps with HelloLedger!