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Practical Ways Melbourne Small Businesses Can Improve Cash Flow

By Jia Lee · 15 August 2026

Interior of a small Melbourne retail shop with a timber service counter, POS terminal and card reader, a stack of invoices and paperwork beside it, and stocked display shelving running down both sides

Cash flow problems do not always mean a business is unprofitable. Often, the issue is timing: wages, super, rent and suppliers have to be paid on schedule, while customers may take weeks to pay an invoice.

For a Melbourne small business, improving cash flow usually comes down to shortening that gap. Some changes — such as invoicing earlier and following up overdue accounts sooner — can help almost immediately. Others, including GST reporting, PAYG instalments and the timing of super, affect cash over a longer period.

The fastest improvements usually come from invoicing as soon as work is complete, collecting deposits or progress payments, and following up overdue invoices early. Longer-term changes to GST, PAYG, super and fixed costs can then make the cash position more predictable.

This guide covers the practical levers rather than the mechanics of building a forecast. If you need the forecast itself, our cash flow forecasting guide covers how to build and maintain one, and our trades cash flow guide covers the construction-specific tools that don’t apply outside that industry.

This article contains general information only and isn’t personal tax, financial or legal advice. Every business is different, so speak with a registered BAS agent, bookkeeper or accountant about your situation.

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Key takeaways

  • Measure your actual debtor days, not your stated terms. A business quoting 14-day terms and collecting in 38 has 38-day terms.
  • The gap you have the most control over is the one between finishing the work and issuing the invoice — and it’s usually longer than owners think.
  • Government agencies pay Peppol eInvoices in 5 days, and eInvoicing removes several delays without any conversation about terms.
  • Your GST accounting basis is a cash decision. On accrual you can owe GST on invoices that haven’t been paid.
  • PAYG instalments can be varied — but only on or before the due date, and dropping below 85% of the ATO figure can attract interest.
  • Payday Super removed a buffer many businesses were relying on without naming it. Super now leaves within 7 business days of payday.
  • VSBC mediation cost $300 per party for a half day as at May 2026, and unpaid money is the largest category of disputes it handles.
  • ATO interest stopped being deductible on 1 July 2025, which changed the arithmetic of paying late.
ReceivablesInvoice quickly and measure debtor days.
CollectionSet terms, deposits and follow-up dates.
Tax timingReview GST, BAS, PAYG and super.
BufferSize reserves around your cash gap.
On this page

Start by measuring the gap you actually have

Before changing anything, work out the real number: the average elapsed time between issuing an invoice and the money landing. Not your terms — your history.

Divide your accounts receivable balance by credit sales for the period and multiply by the days in the period. Do it monthly. The absolute figure is useful; the trend is more useful, because collection deteriorates gradually and a monthly number shows it before the bank balance does.

Many businesses get a higher number than expected when they run this calculation for the first time. Usually, it’s because stated terms describe when payment becomes overdue, not when it actually arrives. A business on 14-day terms collecting in 38 days is financing its customers for 24 days on every invoice. At $50,000 a month in sales, that is roughly $40,000 of the business’s own money sitting in someone else’s account — money that would otherwise be a buffer, and that some businesses borrow to replace.

Also track how long you take to pay your own suppliers. The difference between the two is your cash gap, and it is what every lever below is trying to close.

The delay you have the most control over

One part of the cash cycle is almost entirely within your control: how quickly you invoice once the work is finished.

In practice, this is often the largest single delay in a small business. Work finishes on the 3rd. Invoicing happens at month end because that is when someone sits down to do it. Terms are 14 days. The customer pays on day 12, on time, and the money arrives 40 days after the work was done — with 28 of those days contributed by the business itself.

For many service businesses, invoicing as soon as the work is complete is one of the simplest cash flow improvements available — and it costs nothing. For businesses with recurring work, moving to automatic invoicing on a set date achieves the same thing without anyone remembering.

Invoice accurately the first time. An invoice queried because of a wrong purchase order number or missing reference does not restart at day one of the terms — it restarts at day one of a new cycle after someone gets around to correcting it.

Terms, deposits and staged payments

Payment terms are a commercial decision that most small businesses inherit rather than choose.

Three practical points:

  • Put terms in writing before starting. Without agreed written terms, you have no contractual right to charge interest on late payment, a weaker position in any dispute, and no agreed payment period to point to.
  • Take deposits where the job type allows it. A deposit converts part of your working capital requirement into the customer’s. Some industries have legal caps on deposits — domestic building work in Victoria is one — so check before setting a policy.
  • Stage larger jobs. Anything running longer than a month should have payment points inside it. Waiting until completion to invoice a ten-week project means funding ten weeks of wages and materials from reserves.

Interest on late payment needs a note. You can generally only charge it where your contract or terms of trade provide for it, and the rate needs to be reasonable rather than punitive. In practice its value is mostly as a prompt rather than as revenue — most businesses that include it never invoke it, but its presence changes how an invoice is treated.

eInvoicing: a faster path into the buyer’s system

eInvoicing sends an invoice directly from your accounting software into your customer’s, through the Peppol network, using both parties’ ABNs. It is not an emailed PDF and it is not an invoice portal.

What it removes is a set of delays that have nothing to do with the customer’s willingness to pay: the invoice going to the wrong email address, sitting unopened, being manually re-keyed into an accounts payable system, or being bounced back because a field was entered incorrectly. Australian Government agencies pay eInvoices in 5 days where both the supplier and buyer use Peppol eInvoicing, and the number of Australian businesses registered on the network passed 400,000 during 2025.

Two honest caveats. With private-sector customers the improvement depends on their internal processes, so it is not a guaranteed five days. And both parties need to be connected — if your customers are not, the benefit is limited to whichever ones are. Most major accounting software providers have built it in, so the setup effort is usually modest even if only some of your customers use it.

If you deal with government agencies or larger corporates at all, this is one of the few improvements that requires no conversation about terms with anyone.

Chasing: a sequence, not a mood

Collection improves most when it stops depending on someone feeling annoyed enough to make a call.

A workable sequence for a small business:

  1. Day 0 — invoice issued, on completion, with terms and payment details on it.
  2. Two days before due — a short, neutral reminder. This is one of the most useful contacts in the sequence, because it catches invoices that were never entered rather than ones being deliberately delayed.
  3. Day 1 overdue — a polite follow-up.
  4. Day 7 overdue — a phone call, not an email. Email is easy to defer; a conversation produces a commitment and a date.
  5. Day 21–30 — a formal letter setting out the amount, the history and the next step.
  6. Beyond that — escalation, covered in the next section.

Early follow-up usually matters more than repeated chasing weeks later. Businesses that collect well are often the ones that chase early and consistently.

We also see invoices delayed for surprisingly mundane reasons. The invoice may have gone to an employee who has left, been sent to the wrong accounts address, or be missing a purchase order number. In those cases, nobody is actively refusing to pay — the invoice simply has not reached the right person.

When to escalate, and what it costs in Victoria

Victorian businesses have a genuinely low-cost escalation route that many owners either don’t know about or assume is only for lease disputes.

The Victorian Small Business Commission handles commercial disputes between small businesses, and unpaid money is its single largest category — around 44% of all applications in a recent year. The process starts with free preliminary assistance from a dispute resolution officer, which resolves a meaningful share of matters on its own. If it doesn’t, the matter can progress to subsidised mediation: as at May 2026, $300 including GST per party for a half-day session and $600 for a full day, with a strong resolution rate at that stage.

Compared with the cost and time involved in VCAT or court proceedings, mediation can make escalation a much more practical option than many owners realise. Know the option exists before a debt reaches the point where writing it off feels like the cheaper choice.

For businesses in financial difficulty rather than in a specific dispute, the Small Business Debt Helpline on 1800 413 828 is a free service staffed by financial counsellors, and the ASBFEO publishes practical guidance on handling debt.

Your GST accounting basis

This is the setting most businesses choose once, at registration, and never revisit — and it can change your cash position immediately without changing anything about how you operate.

Basis GST on sales reported GST on purchases claimed Typically suits
Cash When the customer actually pays you When you pay the supplier Businesses with slow-paying customers — you never remit GST on an unpaid invoice
Accrual (non-cash) When you issue the invoice When you receive the supplier invoice Businesses paid quickly that buy on long supplier terms — the credit is claimed before the bill is paid

The ATO’s guidance on choosing an accounting method for GST sets the eligibility: businesses with an aggregated turnover under $10 million can generally choose either method.

For a business with a slow debtor book, moving to the cash basis stops it funding GST on money it hasn’t received — which is one of the more punishing features of a stretched receivables ledger. But it isn’t automatic. A business that collects on the spot and buys stock on 60-day terms is often better off on accrual. Changing basis affects the first BAS after the switch and has knock-on effects in your software, so it’s a decision to work through rather than a setting to flip.

The BAS cycle is a cash flow setting too

Most small businesses report GST quarterly, which produces three large payments a year rather than twelve smaller ones. Whether that helps or hurts depends entirely on whether the money was set aside.

For a business that reliably transfers GST out of the operating account as it’s received, quarterly is fine and involves less administration. For a business that doesn’t, quarterly lets three months of GST accumulate before demanding it in one payment. Monthly reporting is available voluntarily. For that kind of business, it can make cash flow easier to manage because the liability is dealt with in smaller, more frequent amounts.

The ATO can also make this decision for you: it has been moving businesses with a history of late lodgement, non-payment or incorrect reporting from quarterly to monthly GST reporting for a minimum of 12 months. Choosing the cycle deliberately is better than having it chosen.

PAYG instalments: vary them rather than fund them

PAYG instalments are prepayments towards the current year’s income tax, calculated from your last lodged return. When a business has a genuinely weaker year, the instalments keep arriving sized for the stronger one — and funding tax on income you are no longer earning is a straightforward cash flow drain.

You can vary an instalment, but two conditions matter. The variation must be lodged on or before the instalment due date — varying after the fact isn’t available. If the varied amount comes in below 85% of what the ATO calculated, general interest charge can apply to the shortfall, so the estimate behind the variation needs to be a genuine one rather than an optimistic one.

Used properly, this can free up cash when profits have genuinely fallen. Used simply to defer a bill you expect to owe, it turns a cash flow problem into an interest-bearing one.

Payday Super removed a buffer

Since 1 July 2026, Payday Super requires superannuation guarantee contributions each payday, with the fund needing to receive the payment within 7 business days.

The compliance change is straightforward. The cash flow change is larger than it looks. Super previously sat in the business account for up to three months before being paid, and many small businesses were using that money as working capital without ever describing it that way. That float is gone.

If your business felt manageable on cash before 1 July 2026 and tight since, without trading having changed, this may explain the shift. In practical terms, the business has lost a cash-flow buffer that may previously have sat in the operating account for several weeks. The response is forecasting: the wage cost per pay run is now the wage plus super plus PAYG, all moving within days of each other, and the forecast needs to reflect that rather than a quarterly super line.

The Melbourne fixed costs that set your floor

Every business has a base level of fixed costs that has to be funded regardless of how the month is going. For a Melbourne small business, four items usually set that floor, and each has a step in it rather than a smooth curve.

  • Rent and outgoings. Reconcile the outgoings statement against the annual estimate you were given — under a Victorian retail lease, land tax cannot be passed to the tenant and outgoings can’t be charged without a prior estimate.
  • Payroll tax. Victoria’s threshold sits at $1 million in annual Australian taxable wages, and related businesses are generally grouped. Crossing it is a step change in cost, not a gradual one.
  • WorkCover. Registration is generally required once annual remuneration exceeds $7,500, and once rateable remuneration passes $200,000 your claims history starts affecting the premium.
  • Council and levies. Rates, the emergency services and volunteers fund levy, and permit or registration fees specific to your industry.

Our guide to accounting for Melbourne small businesses covers these obligations and their thresholds in more detail. They belong in a cash flow article because they are the costs least responsive to a bad month — everything else can flex, and these can’t.

If you’re already behind

If the position has already slipped, the sequence matters more than the individual actions.

Lodge on time regardless of whether you can pay. Failure-to-lodge penalties are separate from and additional to interest, and lodging keeps a payment arrangement available as an option. Our guides to missed BAS deadlines and catching up on overdue BAS cover the mechanics.

Understand what ATO debt now costs. From 1 July 2025, general interest charge and shortfall interest charge are no longer tax deductible. GIC compounds daily and the rate is set quarterly. The effective cost of carrying an ATO debt rose on that date without the headline rate changing, which makes the old habit of treating the ATO as the cheapest available creditor considerably less sound than it was.

Consider a payment plan early rather than late. Our ATO payment plans guide covers eligibility, how interest continues to accrue, and what happens if a payment is missed.

Get the books current first. You cannot negotiate a realistic arrangement, or make any decision about the levers above, from a file that hasn’t been reconciled in five months. Our catch-up bookkeeping guide covers how to work through a backlog.

Sizing the buffer in days, not dollars

The last lever is the buffer itself, and the usual mistake is to size it in dollars with no reasoning behind the number.

Count days instead. Work out how many days pass between paying for the labour, stock or materials on a piece of work and being paid for it. Then hold enough to cover your fixed outgoings across that window, plus a margin for one significant late payer. A business collecting in 14 days needs materially less buffer than one collecting in 60, at identical revenue.

The advantage of framing it this way is that it makes the target something you can shrink. Every lever above — invoicing on completion, taking deposits, eInvoicing, chasing at day 7, moving to the cash GST basis — reduces the number of days you need to fund, which reduces the buffer required. Holding more cash is one solution. Needing less of it is usually the cheaper one.

Quick recap: the levers, fastest first

  • Invoice on completion, not at month end.
  • Send a reminder two days before due, not two weeks after.
  • Phone at day 7 overdue, don’t email.
  • Put payment terms in writing before starting work.
  • Take deposits or stage payments on anything running longer than a month.
  • Turn on eInvoicing if your software supports it.
  • Measure debtor days monthly and watch the trend.
  • Review your GST accounting basis against how quickly you’re paid in practice.
  • Choose your BAS cycle deliberately, monthly or quarterly.
  • Vary PAYG instalments on or before the due date if the year has genuinely turned.
  • Move GST, PAYG and super out of the operating account as money arrives.
  • Escalate to VSBC before writing a debt off.
  • Lodge on time even when you can’t pay.

Getting help

If work is steady but cash still feels tight, timing may be a bigger part of the problem than profitability — and timing problems are visible in the numbers well before they’re visible in the bank account.

Book a consultation and we’ll work through where your cash is sitting. Our bookkeeping services page covers keeping the file current enough to forecast from, our virtual CFO page covers the forecasting and reporting layer above day-to-day bookkeeping, and our BAS services page covers lodgement and getting the GST basis right.

Official resources

FAQs

Frequently asked questions

What's the fastest way to improve cash flow in a small business?

Shortening the gap between doing the work and being paid for it, because it costs nothing and works immediately. In practice that means invoicing the day work is completed rather than at month end, taking deposits or progress payments where the job type allows, and following up at 7 days overdue rather than 30. Most businesses find that the elapsed time between finishing work and issuing the invoice is longer than they assume, and it's the part of the cycle they can influence most directly. Longer-term levers — the GST accounting basis, PAYG instalment variations, reporting cycle changes — matter too, but they move cash over a quarter rather than a week.

How do I calculate my debtor days?

The standard approach is to divide your accounts receivable balance by your credit sales for the period, then multiply by the number of days in that period. What matters more than the formula is that you use your actual collection history rather than your stated payment terms. A business quoting 14-day terms and collecting in 38 days doesn't have 14-day terms in any sense that affects its bank balance. Track the number monthly rather than annually — the trend tells you whether collection is slipping well before the balance does.

Should my business report GST on a cash or accrual basis?

It depends on how quickly you get paid relative to how quickly you pay suppliers. Cash basis reports GST when money actually moves, so you never remit GST on an invoice that hasn't been paid — which usually suits a business with slow-paying customers. Accrual basis reports GST when you invoice, which can suit a business that gets paid quickly but buys on longer supplier terms, since the GST credit is claimed before the supplier bill is paid. Businesses with an aggregated turnover under $10 million can generally choose. Changing basis has effects on the first BAS after the switch, so it's worth working through with your bookkeeper rather than toggling a setting.

Can I get help recovering an unpaid invoice in Victoria without going to court?

Yes. The Victorian Small Business Commission offers a dispute resolution service that starts with free assistance and can progress to subsidised mediation if that doesn't resolve it. Mediation fees as at May 2026 were $300 including GST per party for a half-day session and $600 for a full day, which is a fraction of the cost of litigation. Unpaid money is the single largest category of applications the VSBC receives. The Small Business Debt Helpline on 1800 413 828 is a separate free service, staffed by financial counsellors, for businesses in financial difficulty rather than in a specific dispute.

Does eInvoicing actually get you paid faster?

It removes several of the delays that sit between sending an invoice and it entering the buyer's payable system — wrong email address, sitting in an inbox, manual re-keying, data entry errors that send it back for correction. Australian Government agencies pay eInvoices in 5 days where both parties use Peppol eInvoicing. With private-sector customers the effect depends on their own processes, so it isn't a guarantee. It is one of the few improvements that doesn't require a conversation with the customer about terms.

How much cash buffer should a small business hold?

There's no universal figure, and sizing it in dollars tends to produce a number with no reasoning behind it. The more useful approach is to count days: work out how many days pass between paying for the labour and materials on a job and being paid for it, then hold enough to cover fixed outgoings across that window plus a margin for one significant late payer. A business collecting in 14 days needs materially less buffer than one collecting in 60, at identical revenue. That reframes the target as something you can shrink by improving collection, not only by holding more cash.

Is it better to pay the ATO late or use a business overdraft?

That comparison changed on 1 July 2025, when ATO interest stopped being tax deductible. General interest charge compounds daily, the rate is set quarterly, and it now carries no offsetting deduction — so the effective cost of carrying an ATO debt rose without the headline rate moving. Commercial finance interest, by contrast, is generally deductible where the borrowing is for business purposes. That doesn't make an overdraft automatically the right answer for every business, but the ATO is no longer the cheap creditor of last resort it was often treated as. If a payment is going to be late, lodge on time regardless and look at a payment plan.

Why is my business profitable but always short of cash?

Because profit and cash are measured at different moments. Profit is recorded when you invoice; cash arrives when the customer pays. A month where you invoice $80,000 and collect $30,000 is a profitable month and a difficult cash month at the same time. Add stock bought before it sells, wages paid weekly, GST payable on invoices that haven't been paid, and super now moving each payday, and the gap between the two numbers can be wide enough to strain a business whose work is genuinely profitable. It's a timing problem, and timing problems have timing solutions.

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