Christmas Cash Flow Checklist for Australian Small Business

November and December are some of the busiest weeks of the year for many small businesses, which makes Christmas cash flow easy to overlook. Then, almost overnight, things go quiet. Customers go on holidays, suppliers shut their doors, and invoices that should have been paid in December somehow land in late January.

Meanwhile, the bills don’t stop. Wages, super, rent and tax all keep coming. A bit of planning now, while there are still nine weeks before Christmas, can make the difference between a relaxing break and a stressful January.

Here’s a practical Christmas cash flow checklist for Australian small business owners, sole traders and tradies.

1. Map out the holiday calendar

Start with the dates. The public holidays over the 2026–27 break are:

Friday 25 December: Christmas Day
Saturday 26 December: Boxing Day (Proclamation Day in South Australia)
Monday 28 December: an additional public holiday in most states and territories (in Tasmania, this is the Boxing Day holiday)
Friday 1 January 2027: New Year’s Day.

Some states also have part-day holidays on Christmas Eve and New Year’s Eve evenings. Check the Fair Work Ombudsman’s list for your state.

Then add your own dates: when you’ll close, when your key customers and suppliers close, and when you’ll be back. That gives you the real “dead zone” where little money may come in.

2. Build a simple cash flow projection

The ATO recommends a cash flow budget or projection as the best way to make sure you have enough cash to meet your tax and other obligations. It doesn’t need to be fancy. A spreadsheet with a column for each week from now until the end of February works well.

The ATO suggests thinking about three things:

Timing: when money will actually arrive and leave, not just when it’s invoiced.
Costs: fixed costs like rent, insurance, utilities and software, plus expected variable costs, wages and taxes such as GST and PAYG instalments.
Income: being conservative with your income estimate gives you some flexibility if unexpected costs come up.

Look for the weeks where the balance dips. Those are the weeks to plan for now.

3. Get paid before everyone goes away

The easiest cash flow win is collecting what you’re already owed.

Invoice promptly. Don’t let December’s work sit unbilled until January.
Chase overdue accounts in November, before your customers’ accounts teams wind down.
Make payment terms clear on every invoice, and make it easy to pay.
Tradies: consider deposits or progress payments for jobs that start before Christmas and finish in the new year.

4. Plan for wages and super over the break

Wages and public holidays

Under the National Employment Standards, permanent employees who would normally work on a day that’s a public holiday get paid their base rate for those ordinary hours. If you plan to close over Christmas, check your award or agreement. Fair Work explains that you can only direct staff to take annual leave during a shutdown if their award or agreement allows it, and the direction must be reasonable and follow the required notice rules. If you’re planning a shutdown, now is a good time to check.

Payday Super

This is the first Christmas under Payday Super. Since 1 July 2026, the ATO requires super to be paid for each payday, and it must be received by the employee’s fund within 7 business days. That means super now goes out with each pay run instead of in one quarterly lump, which is good for budgeting but needs to be in your projection.

A couple of holiday-specific points from the ATO:

Christmas bonuses paid outside your normal pay run are “out-of-cycle” payments. Super on them is due 7 business days after the next regular payday.
Public holidays aren’t business days for Payday Super if they apply across a whole state or territory, which affects your deadlines over the break.

Our earlier article on payroll compliance covers the basics if you need a refresher.

5. Put your BAS dates in the projection

Two BAS dates matter for quarterly lodgers over this period:

Quarter 1 (July to September 2026): the standard due date is 28 October, but if you lodge online you may be eligible for an extra two weeks. If you use a registered tax or BAS agent, the ATO’s agent lodgment program lists 25 November 2026 for electronic lodgement. Either way, make sure the payment is in your November numbers.
Quarter 2 (October to December 2026): due 28 February 2027. That date already includes a one-month extension, so the usual extra time for online lodgement doesn’t apply. Because 28 February 2027 is a Sunday, the ATO’s weekend rule moves it to Monday 1 March 2027.

The GST you collect in your busy pre-Christmas weeks will show up on that Quarter 2 BAS. A good habit is to move GST, PAYG withholding and super into a separate account as you go, so the money is there when the BAS is due.

6. Review your spending and stock

Hold off on big non-essential purchases until after the projection says you can afford them.
Order stock to match realistic demand. Cash sitting on shelves isn’t helping you in January.
Check which supplier accounts fall due over the break, and whether they can be paid before you close or on your return.
Cancel or pause subscriptions you won’t use while you’re closed.

7. If cash will be tight, act early

If your projection shows a shortfall when a tax payment is due, don’t wait. The ATO encourages businesses to contact it or their registered tax professional before the due date to talk through support options. If you owe $200,000 or less, you may be able to set up a payment plan through ATO online services. General interest charge continues to accrue on unpaid amounts, so it pays to sort things out early.

Enjoy the break, without the January surprise

A Christmas cash flow plan doesn’t take long, but it gives you something valuable: a clear picture of where your money will be when you’re not there to watch it.

How Business Ninjas can help

Business Ninjas brings together BN Books for bookkeeping and payroll and BN Tax for tax and BAS, so you’ve got one team looking at the full picture. We’ve been helping Australian small businesses for more than 20 years, 100% remotely and Australia-wide. Whether you need a cash flow projection, help with Payday Super or your BAS lodged on time, we can help.

Take a look at our business services, call 1300 790 113, or contact us online. We know small business!

This article is general information only and doesn’t take your circumstances into account. Check the ATO and Fair Work Ombudsman, or speak with a professional, for advice on your situation.

Sources: ATO: Manage your business cash flow · ATO: Due dates for lodging and paying your BAS