The trust distributed to a family member who never gave us their tax file number — what happens now?

The resolution was signed before 30 June, the way it is every year. The profit of the family business was split across the people the trust has always distributed to — you, your spouse, an adult child who has started working, and this year a share to a parent as well. Nothing about it felt unusual, and no cash has moved yet.

Then the accountant asks a question that sounds like a formality: has each of those people actually quoted their tax file number to the trustee? For the parent, the answer is no — nobody has ever asked, and it did not seem like the sort of thing you ask family. That gap has a specific consequence, and September is when it turns into paperwork.

What the rule is, in one sentence

The ATO's guidance on TFN withholding for closely held trusts states that it is for trustees and beneficiaries of closely held trusts, 'including family trusts'. That is worth pausing on, because owners often assume 'closely held' describes something larger or more corporate than their own arrangement. For these rules, a closely held trust is a resident trust that either satisfies a '20/75 test' — up to 20 individuals holding, between them, fixed entitlements to 75% or more of the income or capital — or is simply a discretionary trust. An ordinary family trust is a discretionary trust, so it is in.

The rule itself: beneficiaries need to quote their TFN to the trustee to avoid having amounts withheld from their payments or unpaid entitlements. If a beneficiary does not quote their TFN before a payment or entitlement occurs, the trustee must withhold from that payment or entitlement, pay the withheld amount to the ATO, and lodge an annual report with the details.

Two details in that sentence do most of the damage in practice. The first is the rate — the ATO instructs trustees to withhold 'at the top rate of tax', and its own worked example applies 47% to each beneficiary's share of the net income. The second is the trigger. The obligation arises 'at the time the payment or entitlement occurs', which means the 30 June resolution is enough on its own. No money has to leave the trust's bank account for the withholding obligation to exist.

What changed on 1 July 2026 — and what did not

There is a genuine simplification here, and it is easy to misread as the whole rule going away. Under the old system, whenever a beneficiary quoted their TFN the trustee had to lodge a quarterly TFN report by the last day of the month following that quarter. A measure announced in the 2023–24 MYEFO changed that; the ATO records that it received Royal Assent on 30 June 2026 and came into effect from 1 July 2026.

So from 1 July 2026 the quarterly TFN report is gone — the last one, for the March–June 2026 quarter, was due by 31 July 2026. In its place, the beneficiary's TFN must be reported in the statement of distribution when the trust tax return is completed. The ATO also says additional labels will be included on the 2027 trust tax return to support circumstances where a TFN has not been provided.

What did not change is the part that costs money. The ATO says this expressly: the new reporting arrangement does not change the TFN withholding and reporting obligations of trustees where the beneficiary's TFN has not been quoted before a distribution. Losing a quarterly form is not the same as losing the rule behind it.

The dates that follow, if you did have to withhold

Where a trustee has withheld, three deadlines sit close together, and the first of them is three weeks away.

The Annual TFN withholding report is due three months after the end of the income year — for most trusts, 30 September. If no amounts were withheld from any beneficiary during the year, no report is needed for that year. Then the payment summary: the trustee must give an annual payment summary to each beneficiary from whom an amount was withheld, no more than 14 days after the due date for that report, which for most trustees means 14 October. It can be electronic, and it does not go to the ATO. Finally the money: the annual activity statement and the payment of the withheld amounts are due by 28 October for most trustees — 28 days after the report.

Separately, and regardless of any of this, the Annual trustee payment report forms part of the trust tax return, and the ATO is explicit that the total of each beneficiary's distributions and share of the net income must be reported 'even if all beneficiaries have quoted their TFNs and you have no withholding obligations'.

Two things commonly got wrong

The first is assuming a pensioner parent is outside the rules. The ATO addresses this directly: beneficiaries receiving pensions and benefits, including the age pension and disability support pension, are not exempt, and must quote their TFN to avoid having amounts withheld. The exclusions that do exist are narrower and different in kind — the TFN withholding rules do not apply to beneficiaries that are non-residents for tax purposes, that are exempt entities such as tax concession charities and deductible gift recipients, or that are under a legal disability, for example minors.

The second is treating a withheld amount as money burnt. It is not. The ATO's instruction to a beneficiary in that position is to lodge an income tax return showing their share of the trust net income and the amount withheld by the trustee — the withholding is a credit against the tax on that income, and where 47% is more than the beneficiary's own rate, the difference comes back through the return. It is a cash-flow problem and an administrative one, not a permanent loss. The genuine cost is that the family's money sits with the ATO for months for no reason at all.

Quoting a TFN is easier than most people expect, which is what makes the failure to do it faintly absurd. The beneficiary provides their TFN, full name, date of birth, postal address, residential or business address and entity type; there is no prescribed format, and it can be done verbally or in writing, including electronically. The ATO's one piece of practical advice is that the details should match what is on the beneficiary's most recent tax return, so that the ATO can match its records and the trustee is not later told the details were wrong.

The order that avoids all of this is simply the reverse of what usually happens: collect and record the TFN of every intended beneficiary before the trustee signs the resolution, not after the accountant asks in September. For a trust that adds a beneficiary in a given year — a child who has just started working, a parent brought into the distribution for the first time — that is the year the gap appears.

This is general information current as at 8 September 2026 and not advice about any particular trust; how these rules apply depends on the trust deed, the class of beneficiaries in it, and what the trustee actually resolved. If your family runs a business or holds investments through a trust, this sits alongside the trust income schedule each beneficiary lodges with their own return, and both are part of what our companies, trusts and bookkeeping service exists to keep in order.