ATO Debt Calculator
Project what an unpaid tax balance is likely to cost while it sits there, and see what refinancing it would look like instead.
Indicative only · not an offer of credit
Interest over 24 months if nothing changes
$16,748
On $85,000 at 11.00%, paying $1,500 a month.
Left with the ATO
- Interest over 12 months
- $8,900
- Interest over 24 months
- $16,748
- Interest over 36 months
- $23,420
- Balance after 24 months
- $65,748
Refinanced
- Interest over 12 months
- $6,174
- Interest over 24 months
- $11,887
- Interest over 36 months
- $17,104
- Monthly repayment
- $1,009
- Balance after 24 months
- $72,672
- Paid off in
- 10 years
Interest over 24 months
On these figures, refinancing costs about $4,861 less in interest over 24 months.
One more thing worth knowing: the general interest charge is generally not deductible in the way interest on a business loan usually is. That difference can matter as much as the rate itself. It is a question for your registered tax agent, not for us — we are brokers, and we do not give tax advice.
If the balance is not moving, the sooner someone reads the whole picture the more options are still open. Bring the portal figure and the last three months of trading.
Talk it through with a brokerAssumptions
- The GIC rate and the refinance rate are figures you typed. Neither is a current rate, a comparison rate, or a lender product we are offering. The ATO resets the GIC every quarter — check it and enter today's figure.
- The ATO general interest charge compounds daily. This tool compounds monthly as a reasonable approximation, so the real cost of leaving the balance where it is will be slightly higher than what you see here.
- Your ATO payment is assumed to be the same amount every month, made on time, with no new BAS, PAYG or income tax liability added while the projection runs. In a trading business, new liabilities usually do get added.
- The refinanced figure is principal and interest at a fixed rate over the term you chose, with equal monthly repayments and the full ATO balance drawn on day one.
- No fees are included on either side: no ATO payment plan variation, no GIC remission, no establishment, valuation, legal, discharge, break or ongoing fees, no lender's mortgage insurance and no broker fee.
- Nothing here models the tax treatment of any interest you pay. Deductibility depends on your circumstances and is a matter for your registered tax agent.
- Results are rounded, and a lender using daily accrual will land on a slightly different number.
How to read the projection
An ATO balance does not sit still. This tool takes the balance you enter, applies a daily compounding charge to it, and shows you what the debt looks like in three months, six months and twelve if nothing changes. Alongside it sits the repayment on a loan of the same size, so you can see the two costs next to each other.
The comparison this page is really making
- What the tax debt costs you to leave where it is, month after month.
- What the same amount costs as a loan, at a rate you enter, over a term you choose.
- The gap between the two, which is the whole reason people refinance tax debt in the first place.
The gap is usually the point. Statutory interest on an overdue tax debt is set to encourage payment, not to be a competitive borrowing rate. Moving that balance onto a loan secured against property is often the difference between a debt that grows and a debt that reduces.
How the general interest charge actually works
The general interest charge is not an annual fee added at the end of the year. It is calculated daily on the outstanding balance, and each day's charge is added to the balance the next day's charge is worked out on. That is what compounding means, and across a year it makes a real difference to the total.
The rate is set by the ATO each quarter. It is published, it moves, and it has moved a long way in both directions over the years. Whatever rate this tool starts from is an assumption we have to make so the arithmetic has something to work with. It is not the ATO's current figure and should not be treated as one. Check the current quarter's rate on the ATO's own website, or ask your registered tax agent, before you rely on any projection here.
Entering a payment plan does not, on its own, stop the charge. In most cases it continues to accrue on whatever balance remains. That is why a plan sized to what you can afford rather than to what the debt costs can run for a long time without the balance moving much, which is a demoralising place to be and a common reason people call us.
Remission of the general interest charge can be requested in some circumstances. Whether yours qualify is a matter for the ATO and for your registered tax agent. WeL’nd does not make remission applications, does not negotiate debt waivers with the ATO, and does not advise on tax.
What the calculator assumes
- The charge rate is held constant across the projection. In reality the ATO resets it every quarter.
- The balance you entered is your whole balance on day one, across every account.
- No new liability falls due during the projection. The next BAS, the next instalment and the next superannuation obligation are not in the figure unless you add them.
- Payments are applied on the dates you nominate, in full.
- No remission is assumed, because none is guaranteed.
- The comparison loan is a plain principal-and-interest facility at the rate and term you entered, with no fees.
The second and third assumptions matter most in practice. Most businesses carrying tax debt are also still trading, which means new obligations keep arriving. A projection on a static balance is a floor, not a ceiling.
What it does not account for
Interest is only one part of what an overdue tax position costs. The tool models that part and nothing else.
- Administrative penalties. Failure to lodge on time and shortfall penalties are assessed separately from the interest charge.
- Shortfall interest charge, which applies to amended assessments and is calculated on a different basis.
- Superannuation guarantee charge, which is its own liability with its own consequences for directors.
- State obligations such as payroll tax, which are administered by your state revenue office rather than the ATO.
- The costs of the refinance itself: establishment, valuation, legal, discharge and registration.
- The commercial cost of the position. Suppliers, landlords and funders all read a tax debt, and some of them price it.
It also cannot see the shape of your file. Two businesses with the same balance can be in entirely different situations depending on whether lodgements are current, whether a payment plan is in place and being met, and whether the ATO has already begun recovery action.
How the ATO and a lender each see this debt
The ATO is a creditor with powers ordinary creditors do not have. It can issue garnishee notices to your bank or your debtors. It can issue director penalty notices that move a company liability onto a director personally. It can support a winding-up application. These are legal processes with short timeframes attached.
If you have received a director penalty notice or a statutory demand, the clock is already running and the first calls are your accountant and, where the situation warrants it, a solicitor. Finance can answer some of those situations, but only when it is arranged in time. Do not wait for the next notice before you start.
A lender reads the same balance differently. Tax debt tells them something about the business, and what it tells them varies. Sometimes it reflects a bad trading period that has since turned. Sometimes it means ATO money has been used as working capital, which is a harder conversation. Some mainstream lenders will not proceed while a tax debt is outstanding at all. Others will fund the payout of the debt at settlement, which is usually the cleaner structure because the debt is gone the day the loan lands.
What a lender will want to see
- Lodgements up to date, or a clear and dated plan to bring them up to date.
- An ATO integrated client account statement showing the running balance and the payment history.
- Evidence the business is trading: recent BAS, bank statements, an aged debtors listing.
- The security on offer, and enough equity in it once the existing debt is counted.
- A plausible explanation of how the debt arose and what has changed since.
Lodgements matter more than most people expect. A lender can work with a debt it can see and size. It cannot work with one nobody has quantified yet. If you are behind on lodgements, that is the first job, and it belongs with your registered tax agent.
What to do next
- 01
Get the real balance
Pull the integrated client account from the ATO portal or ask your tax agent for it. Work from that figure, not from the last letter that arrived.
- 02
Bring lodgements current
Outstanding returns and BAS keep the debt undefined and keep lenders out. Your tax agent does this part.
- 03
Establish what security exists
Residential or commercial property, held personally or through a trust or company. Equity, not just value, is what a lender lends against.
- 04
Move before the notices do
Options narrow as recovery action escalates. A file with a payment plan being met is easier to place than one with a garnishee already issued.
We deal with the lenders. You deal with running the business. If you want a straight read on whether a refinance is realistic in your situation, call us and we will tell you what we see.
FAQ
Questions people actually ask
If yours is not here, ask it. We would rather answer the awkward one early than have you find out later.
1300 015 267- Does this calculator show the ATO's current interest rate? +
- No. The rate used is an assumption so the projection has something to work with. The ATO sets and publishes the general interest charge rate each quarter. Check the current figure with the ATO or your registered tax agent before relying on any number here.
- Does a payment plan stop the interest? +
- Generally no. In most cases the general interest charge continues to accrue on the balance that remains while the plan runs. That is why a plan sized only to what you can afford can leave the balance almost unchanged after a year.
- Can the general interest charge be remitted? +
- It can be remitted in some circumstances. That is a matter for the ATO and for your registered tax agent to pursue. WeL’nd does not make remission applications and does not negotiate with the ATO on a client's behalf.
- Can ATO debt actually be refinanced? +
- In many cases, yes, most often into a loan secured against property. Lenders vary widely in appetite. Some will not proceed while a tax debt is outstanding, others will fund the payout at settlement. Nothing is approved until a lender assesses the file.
- Do I need to own property to refinance tax debt? +
- Property makes it far more straightforward. Without security the options are narrower and generally priced higher. Business assets, commercial property and equipment can sometimes be used instead, depending on the size of the debt and the lender.
- Will the ATO report my tax debt to credit reporting bureaus? +
- The ATO can disclose certain business tax debts to credit reporting bureaus where defined criteria are met. Those criteria are set by law and can change. Ask your registered tax agent whether your position is at risk, because disclosure narrows lender appetite quickly.
- What should I do if I have received a director penalty notice? +
- Treat it as urgent. A director penalty notice has a fixed period attached and the available options depend on what type of notice it is. Speak to your accountant, and to a solicitor where appropriate, straight away. Finance can sometimes answer it, but only if it is arranged in time.
- My lodgements are behind. Is that a problem? +
- It is usually the first problem. A lender cannot assess a debt that has not been quantified, and outstanding lodgements also affect what the ATO will agree to. Bringing lodgements current is work for your registered tax agent and it is worth doing before an application.
- Is any of this tax advice? +
- No. WeL’nd is a finance and mortgage brokerage. We arrange credit. We do not give tax, legal or insolvency advice, and where a situation needs a registered tax agent, an accountant or an insolvency practitioner, we will say so plainly.
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Credentials
- Credit Representative 554029
- ABN 20 672 801 651
- FBAA member
- AFCA external dispute resolution
Services
Where this applies
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Read moreBAS & GST Debt
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Read moreBusiness Debt Consolidation
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Reading
Understand the mechanism
How the ATO General Interest Charge Works
The general interest charge compounds daily on an unpaid tax balance, and the rate resets every quarter. Here is the mechanism, and what changed for deductibility in 2025.
Read moreRefinancing ATO Debt: What Is Possible
Nobody refinances the ATO. A lender advances funds, the funds pay the balance, and the interest stops. The funding paths, what an assessor is really looking at, and what stops a file dead.
Read moreATO Payment Plan vs Refinancing
A payment plan changes the schedule. A refinance changes the creditor. Both are legitimate, and the choice usually comes down to equity, serviceability and whether the balance is still growing.
Read moreHow lenders actually view tax debt
Tax debt is not read like ordinary debt, because the ATO can act without going to court. Here is how prime, non-bank and private lenders assess it, and what makes a file fundable.
Read moreDirector Penalty Notices, Explained
A director penalty notice moves a company’s unpaid PAYG withholding, GST and superannuation onto the directors personally. The 21 days, the lockdown rule, and what to do inside the window.
Read more
A calculator cannot see your whole file.
It works from what you typed. We work from what a lender will actually assess — and we would rather tell you the real answer early.
Or call us
1300 015 267Monday – Friday, 09:00 to 17:30

“Tell me the number. I have almost certainly seen worse.”
Dave Pham · Head Broker