Quick answer
Paying late costs more than the late fee. There are supplier fees and lost early-payment discounts, ATO general interest charge that compounds daily and has not been tax deductible since 1 July 2025, lost trade credit or stop-supply, and time spent managing creditors. When those costs over the delay exceed the dollar cost of short-term funding, paying on time with finance is often cheaper than paying late.
Key points
- Late fees are the visible cost; lost terms and stop-supply are often bigger.
- ATO GIC compounds daily and isn't deductible from 1 July 2025.
- Suppliers remember late payers — terms tighten and allocation shrinks.
- Short-term funding can be cheaper than paying late, but only if the gap is temporary.
When cash is tight, paying bills late can feel like free finance. The supplier waits, the ATO waits, the landlord waits. But late payment is rarely free. The costs are just spread across fees, charges, lost terms and damaged relationships — which makes them easy to overlook and surprisingly expensive once added up.
What does paying the ATO late cost?
The ATO applies general interest charge (GIC) to overdue tax. It is calculated on a daily compounding basis. Two changes make it dearer than many owners remember:
- No deduction. ATO interest charges incurred on or after 1 July 2025 are no longer tax deductible.
- Payment plans don’t stop it. The ATO says tax debts on a payment plan continue to accrue GIC.
On top of GIC, continued non-payment can lead to firmer ATO collection action, and lodgement penalties apply separately if returns or BAS are lodged late. Our page on ATO debt: pay now or later goes through the options.
What does paying suppliers late cost?
It depends on your terms and your supplier, but the costs usually include:
| Cost | How it shows up |
|---|---|
| Late fees | Where your trading terms allow them |
| Lost early-payment discounts | A discount you would have taken by paying on time |
| Tighter terms | 30 days becomes 14, or cash on delivery |
| Lower priority | Allocation of scarce stock goes to better payers |
| Stop-supply | The worst case — you can’t get stock at all |
| Admin time | Chasing, juggling and explaining |
The last three rarely appear on a statement, but they can cost more than all the fees combined.
What about rent, utilities and other bills?
Leases often allow for interest on overdue rent and may give the landlord rights if arrears persist. Utilities, insurers and software providers may add fees or suspend service. Each one adds friction at exactly the time you need things to run smoothly.
When is short-term funding cheaper than paying late?
When three things are true:
- The gap is temporary — a large debtor is paying next month, a seasonal peak is coming, a refund is due.
- The total cost of paying late is larger than the total dollar cost of short-term funding over the same period.
- Repayment is clear — you know where the money to repay the facility comes from.
If the gap isn’t temporary — if every month is short — then funding treats a symptom. The underlying issue might be pricing, costs, debtor days or a business model that needs adjusting. business.gov.au suggests practical steps like invoicing earlier and keeping stock levels from running too high. See when waiting is smarter.
Illustrative example: the wholesale bakery
Illustrative only — invented figures.
A wholesale bakery is owed $70,000 by a supermarket customer on 60-day terms, while its flour miller wants payment in 14 days and its quarterly BAS is due. The owner’s instinct is to pay the miller late and put the BAS on a payment plan.
- Paying the miller late would lose a prompt-payment discount and risk moving from 14-day terms to cash on delivery.
- Putting the BAS on a plan means GIC compounding daily, not deductible.
- The $70,000 receivable is due in six weeks.
A short-term facility covering the miller and the BAS, repaid when the supermarket pays, costs less in total than the combined late-payment costs — and keeps both relationships clean. Facing a gap like this? Check what’s possible.
How do I put a number on paying late?
Use the cost-of-waiting calculator. Enter late fees and ATO charges as monthly costs of waiting, lost discounts as a one-off loss, and the finance cost you’ve been quoted. The calculator shows which path costs more over the gap. For the broader method, read the cost of delaying business investment.
Which bills should I protect first when cash is tight?
When there isn’t enough to pay everything on time, the order matters. A sensible priority list for most businesses:
- Wages and super. Staff need paying, and under Payday Super contributions are due within 7 business days of payday.
- Tax lodgements, even if you can’t pay in full. Lodging on time avoids separate lodgement penalties and keeps options open.
- Critical suppliers — the ones who can stop supply and halt trading.
- Rent and essential services.
- Everything else, with a phone call explaining when payment will come.
Talking to creditors early almost always costs less than silence. And if the same list has to be triaged every month, the gap isn’t temporary — it’s structural, and the fix lies in pricing, costs or debtor collection rather than in funding. The ATO’s own advice on GST is to put aside the GST you collect so obligations can be met when due; the same discipline applies to PAYG and super.
Pay on time, keep your terms
If a short, temporary gap is pushing you towards paying late, it’s worth checking whether funding it costs less. A 60-second enquiry carries no credit check. We don’t blast your details around the industry; one lending specialist looks at your situation — including any ATO debt, which we consider case by case — and calls you. Please be accurate about the amounts, the due dates and when the money is coming in, so the facility is sized to the gap and no more.
Frequently asked questions
What happens if I pay the ATO late?
The ATO applies general interest charge to overdue amounts, calculated on a daily compounding basis. From 1 July 2025, ATO interest charges are no longer tax deductible. Continued non-payment can also lead to firmer collection action.
Do payment plans stop the ATO interest?
No. The ATO says tax debts on a payment plan continue to accrue GIC, which compounds daily.
What does paying suppliers late cost?
Late fees where terms allow, lost early-payment discounts, tighter credit terms, lower priority on stock and, in the worst case, stop-supply. Each has a dollar cost even if it isn't on an invoice.
Is borrowing to pay bills a good idea?
It can be when the gap is temporary and the cost of paying late is higher than the cost of funding. If the gap is ongoing, the underlying cash-flow problem needs fixing, and borrowing alone won't do it.