No ABN Withholding Rule Explained [Complete 2026 Guide]

When an Australian business pays a supplier more than $75, excluding GST, and that supplier hasn’t quoted an Australian Business Number, the payer generally must withhold 47% of the payment and send it to the Australian Taxation Office, rather than paying the supplier in full. This no-ABN withholding rule has applied at that rate since 1 July 2017, and it catches more small businesses than its compliance-nerd reputation suggests, since contractors, hobbyists, and even fully compliant sole traders can trigger it the moment the ABN field on an invoice is left blank. Here is exactly when the rule applies, who’s exempt, and what a payer has to do once withholding starts.

What triggers the 47% no-ABN withholding rate?

The no-ABN withholding rule applies whenever a payer makes a payment of more than $75, excluding GST, to a supplier who hasn’t provided an ABN, according to the ATO. Once that threshold is crossed, the payer generally withholds 47% of the total payment and remits it to the ATO instead of paying the supplier in full.

Figure 1: When a supplier doesn’t quote an ABN on a payment over $75, excluding GST, 47% of that payment is withheld and remitted to the ATO instead of being paid out. Source: Australian Taxation Office, Withholding if ABN is not provided.

The 47% figure isn’t an arbitrary penalty rate. It’s the top individual marginal tax rate, which the ATO’s own resident tax tables list as 45% on every dollar of taxable income over $190,000 for both the 2025-26 and 2026-27 income years, plus the 2% Medicare levy. Add those together and the total lands at 47%, the rate that has applied to no-ABN withholding since 1 July 2017. The logic behind using the top rate is straightforward: since the ATO doesn’t know a no-ABN supplier’s actual tax position, it withholds as though that income sits in the highest bracket, and the supplier settles the difference, if any, when they lodge a return.

Figure 2: The 47% no-ABN withholding rate is built from the 45% top individual marginal tax rate plus the 2% Medicare levy. Source: Australian Taxation Office, Tax rates - Australian resident; Statement by a supplier not quoting an ABN.

There’s a real cost on both sides of a payment like this. The payer can’t claim a GST input tax credit for an amount they’ve withheld, so the ATO advises keeping withheld transactions in separate records from ordinary payments. For the supplier, withholding at 47% instead of getting paid in full can be a serious cash flow hit, especially for a sole trader whose actual tax rate is nowhere near the top bracket. That gap only gets settled once the supplier lodges an income tax return and claims the amount withheld as a credit, which can be months away from the date of the original invoice.

Figure 3: On a $1,000 payment with no ABN quoted, $470 goes to the ATO as withheld tax and only $530 reaches the supplier. Source: Australian Taxation Office, Withholding if ABN is not provided.

How does a supplier quote an ABN to avoid being withheld from?

A supplier avoids the rule entirely by quoting their ABN by the time the payment is made, on any document connected to the supply. The ATO accepts an ABN quoted on an invoice, a quote, a renewal notice, an order form, a receipt, a contract or lease document, letterhead, an email or web page, a phone-quoted record, or a promotional catalog, and the payer is expected to keep that document with their other records for the transaction.

Payers don’t have to independently verify that a quoted ABN is valid. If they suspect an ABN doesn’t actually belong to the supplier, or to the supplier’s agent when the supply runs through one, they can check it using the ABN Lookup tool or by calling the ATO directly. If a payer has reasonable grounds to believe a quoted ABN is invalid, for example because it belongs to a different entity entirely, they’re still required to withhold 47% even though a number was technically provided. This is exactly the kind of gap a jurisdiction-aware invoice generator is built to close, since labeling the ABN field clearly and requiring it up front removes the single most common way this rule gets triggered by accident: a blank field on an otherwise complete invoice.

If a supplier has applied for an ABN but hasn’t received it yet, the payer can agree to hold the payment until the ABN comes through and gets quoted. What a payer cannot do is pay the supplier in full on the understanding that an ABN will be quoted later. Short of an agreed hold, the 47% withholding applies to any payment made before an ABN is quoted.

Who qualifies for the Statement by a supplier not quoting an ABN exemption?

An individual or business that doesn’t have to quote an ABN can instead complete a Statement by a supplier not quoting an ABN, and the ATO recognizes 8 separate situations where that form applies instead of withholding.

Exemption category	Who it covers
Not carrying on an enterprise	The supplier isn’t running a business in Australia at all
Individual under 18	Payment is $350 or less per week
Payment at or under $75	Excluding GST, per payment
Wholly input-taxed supply	The supply itself is input taxed under GST law
Hobby, or wholly private or domestic supply	Individual gives a written statement to that effect
No reasonable expectation of profit	Individual or partnership, not run as a business for profit
Not entitled to an ABN	Because they aren’t carrying on an enterprise in Australia
Whole payment is exempt income	The payment itself is exempt from income tax
Standard case, no exemption applies	47% is withheld from the total payment

Table 1: The ATO’s 8 recognized exemption categories for a Statement by a supplier not quoting an ABN, alongside the standard 47% outcome when none apply.

The hobbyist and private-supply categories are the ones small businesses run into most often. Someone selling handmade goods at a market as a genuine hobby, or a private individual doing occasional odd jobs with no expectation of ongoing profit, can give the payer a written statement instead of an ABN, and the payer doesn’t withhold. The same applies to a supplier who genuinely isn’t carrying on an enterprise in Australia at all, which is different from simply not having gotten around to registering for an ABN. A supplier who is carrying on an enterprise but hasn’t quoted an ABN doesn’t qualify for any of these categories, and 47% withholding is the default outcome.

Figure 4: The $75 general payment threshold and the $350-per-week threshold for an individual supplier under 18 are the two dollar figures that gate the no-ABN withholding rule. Source: Australian Taxation Office, Statement by a supplier not quoting an ABN.

What must a payer do once they start withholding?

A payer required to withhold has a specific compliance checklist to work through, starting with registering for PAYG withholding with the ATO if they aren’t already registered, which businesses that already withhold from employee wages typically are. From there, the payer withholds 47% from the payment, reports and pays the withheld amount to the ATO through their activity statement, and completes a PAYG payment summary, form NAT 3283, giving a copy to the supplier at the time of payment or as soon as possible afterward.

That payment summary matters to the supplier directly: it’s what they use to claim a credit for the withheld amount in their own income tax return, so the withholding isn’t lost money, just money that arrives back at tax time instead of at invoice time. The payer also keeps a copy of every payment summary issued and completes an annual PAYG withholding where ABN not quoted report, form NAT 3448, covering all no-ABN withholding for the year. Recurring suppliers who never get around to quoting an ABN turn this into an ongoing administrative task rather than a one-off, which is another reason a jurisdiction-aware recurring invoice setup that flags a missing ABN before the first payment goes out saves real back-office time.

What happens if a payer doesn’t withhold when required?

A payer who was required to withhold but didn’t can face a penalty equal to the amount that should have been withheld, on top of still owing that amount to the ATO. The ATO treats a failure to withhold as an offense in its own right, and payers can be prosecuted in appropriate cases, not just charged the shortfall.

Figure 5: A payer who skips withholding on a $1,000 no-ABN payment still owes the ATO the same $470 they should have withheld, plus exposure to a matching penalty. Source: Australian Taxation Office, Statement by a supplier not quoting an ABN.

In practice, this means getting the ABN field right at the point an invoice or payment is set up costs nothing, while getting it wrong after the fact costs the withholding amount, a matching penalty, and the administrative cleanup of correcting activity statements already lodged. For a business that regularly pays contractors or small suppliers, that’s a strong argument for an invoice and payment workflow that asks for an ABN before money moves rather than treating it as an optional field to chase down later.

The Bottom Line

The no-ABN withholding rule comes down to two numbers that rarely change: $75, excluding GST, as the payment size that triggers it, and 47% as the rate withheld once it does, a figure built from the 45% top marginal tax rate and the 2% Medicare levy. Most Australian businesses never see this rule in practice because their suppliers routinely quote an ABN on every invoice, but the moment one doesn’t, whether that’s a genuine hobbyist claiming an exemption or a contractor who simply left the field blank, the payer is the one holding the compliance and financial risk if they get it wrong. An invoice generator built for Australian GST rules, one that treats the ABN field as required rather than optional and flags a payment when it’s missing, turns this from a rule a busy accounts team has to remember into one the paperwork enforces automatically. The full picture of how the ABN field should appear on an invoice, and exactly when a tax invoice is required in the first place, are their own separate walkthroughs worth reading alongside this one, together with the broader state of late payments across Australian small business.

Frequently Asked Questions

What is the ABN withholding rate in Australia? 47%, effective since 1 July 2017, made up of the top individual marginal tax rate of 45% plus the 2% Medicare levy. A payer generally must withhold that rate from a payment of more than $75, excluding GST, made to a supplier who hasn’t quoted an ABN, according to the Australian Taxation Office.

What is the dollar threshold before no-ABN withholding applies? $75, excluding GST, per payment. The ATO’s no-ABN withholding rule only applies once a single payment for goods or services crosses that amount and the supplier hasn’t provided an ABN.

Who can complete a Statement by a supplier not quoting an ABN? The ATO lists 8 situations where a supplier can complete this form instead of having tax withheld, including hobbyists, individuals under 18 earning $350 or less a week, supplies of a wholly private or domestic nature, and suppliers not carrying on an enterprise in Australia.

What happens if a payer doesn’t withhold when required? The payer can face a penalty equal to the amount that should have been withheld, and the ATO treats a failure to withhold as an offense that can be prosecuted in appropriate cases, on top of still owing the ATO that amount.

Sources and References

1. Australian Taxation Office: Withholding if ABN is not provided, the $75 (excluding GST) payment threshold and the general no-ABN withholding rule.
2. Australian Taxation Office: Statement by a supplier not quoting an ABN, the 47% rate effective 1 July 2017, the 8 exemption categories, payer obligations, and the penalty for failing to withhold.
3. Australian Taxation Office: Tax rates - Australian resident, the 45% top marginal tax rate for taxable income over $190,000, 2025-26 and 2026-27 income years.
4. Australian Taxation Office: PAYG payment summary - withholding where ABN not quoted (NAT 3283), the form payers issue to suppliers after withholding.
5. Australian Taxation Office: PAYG withholding where ABN not quoted - annual report (NAT 3448), the payer’s annual reporting obligation.
6. Australian Business Register: ABN Lookup, the tool payers can use to verify a supplier’s quoted ABN.

Note: All figures verified as of October 2026.