The ATO clearance certificate you need to sell a flip

There is a piece of paperwork that can quietly lock up fifteen percent of your sale price on settlement day, and most first-time flippers have never heard of it until their conveyancer asks whether it is sorted. It is the ATO clearance certificate, and since the start of 2025 you need one on every property sale in Australia, no matter the price. Miss it and the buyer is legally required to hold back fifteen percent of what they pay you and send it to the Tax Office instead. For a flipper, whose entire model runs on getting capital back out fast and into the next deal, that is one of the most avoidable cash-flow hits there is.

This is general information, not tax or legal advice. The foreign resident capital gains withholding rules are set by the ATO and change over time, and how they apply to you depends on your residency and how you hold the property, so confirm the current rules at ato.gov.au and talk to your own accountant or conveyancer before you sell.

What an ATO clearance certificate is

The ATO clearance certificate sits inside a regime with a misleading name: foreign resident capital gains withholding. It was built to stop foreign residents selling Australian property and leaving without paying the tax they owed. The mechanism is simple. When you sell, the buyer is required to withhold a slice of the purchase price and remit it to the ATO, unless you hand them a clearance certificate that confirms you are an Australian resident for tax purposes. The certificate is how a resident seller says "the withholding does not apply to me", so the buyer pays you the full price instead.

For years this only mattered on expensive sales. Until the end of 2024 the rule only bit on properties selling for $750,000 or more, and the withholding rate was 12.5 percent. That let a lot of ordinary sellers ignore it. Two changes from 1 January 2025 ended that. The rate went up to 15 percent, and the $750,000 threshold was removed entirely. The regime now applies to every sale of residential property regardless of value, so even a modest regional flip is caught. The new rules apply to contracts entered into on or after 1 January 2025; a contract signed before that date stays under the old thresholds.

Note the trap in the name. It says capital gains, but it works as a withholding on the sale transaction itself, not on your profit. Because you are an Australian resident, the clearance certificate tells the buyer you are not a foreign resident, so nothing is withheld. That holds true whether the ATO ultimately taxes your profit as ordinary income, which a genuine flip is, or as a capital gain. Either way, the certificate is what keeps the buyer from skimming 15 percent off the top at settlement.

Why this bites a flipper harder than a normal seller

Someone selling the home they have lived in for a decade can absorb a settlement hiccup. A flipper cannot, for two reasons.

The first is that the withholding is on the whole sale price, not your margin. Sell a flip for $700,000 without a clearance certificate and the buyer has to withhold $105,000 and send it to the ATO. That is not 15 percent of your profit, it is 15 percent of the gross. You do not get it back at settlement. You get it back as a credit when you lodge your tax return for that income year, which could be many months away. In the meantime it is money you cannot deploy, and for a flipper the whole game is the speed your capital recycles. Lock up six figures for most of a year and the return on your next deal that you could not fund is the real cost, on top of the holding costs the first project already racked up.

The second is that flippers sell often. A buy-and-hold investor might trigger this rule once a decade. If you are running two or three projects a year, every single exit needs its own certificate, in the name of whoever actually owns the property. If you flip through a company or trust, the entity is the seller, so the certificate has to be in the entity's name, not yours personally. If you own a property jointly, each owner on the title needs their own certificate. Getting the name wrong is as good as not having one.

How to get a clearance certificate

The good news is that for a resident flipper this is a formality, not a fight. The certificate is free. You apply online through the ATO, and in straightforward cases where your tax affairs are in order it can issue automatically within a few days. The ATO's own guidance says to allow up to 28 days, because an application that triggers a manual review, or one lodged on paper, takes longer. Once issued, a clearance certificate is valid for 12 months and can cover more than one sale in that window.

Two things make this easy to manage if you plan ahead and painful if you do not.

• You do not need a signed contract to apply. You can get the certificate before you have even listed, which means there is no reason to leave it until settlement is bearing down on you.
• It lasts a year. Apply once and the same certificate covers any sale you settle in the next 12 months, so for an active flipper it is close to a standing document you keep current.

The one case where it is not a formality is if you genuinely are a foreign resident for tax purposes, for example an expat flipping from overseas. Then the withholding does apply and a clearance certificate is not available to you, though you can apply to the ATO for a variation to reduce the amount withheld to something closer to your actual liability. That is a conversation for your accountant, not a form you fill in casually.

What happens if you turn up to settlement without one

If there is no valid clearance certificate at settlement, the buyer is not doing you a favour by paying you in full. They are legally on the hook. The obligation to withhold sits with the purchaser, so a careful buyer's conveyancer will insist on holding back the 15 percent and remitting it to the ATO rather than risk the buyer being liable for it themselves. You cannot talk them out of it at the table.

The withheld amount is not lost. It is credited against your income tax for the year the contract was signed, and any excess over what you actually owe is refunded once your return is assessed. But "you get it back eventually" is cold comfort when you were counting on that cash to settle your next purchase. This is why the certificate belongs on your selling cost and settlement checklist from the day you decide to sell, not treated as a last-minute settlement item.

Fitting it into a flip timeline

Because a flip runs on a tight clock, the cleanest approach is to stop treating the certificate as a sale-time task and treat it as an ownership task. Here is how I slot it in.

1. Apply the moment the project is yours. You can lodge the application as soon as you own the property, long before the reno is done. There is no downside to having it ready early and plenty of downside to scrambling for it later.
2. Match the name to the title exactly. Personal name, company, or trust, the applicant has to be the legal owner on the contract of sale. Check this against how you actually structured the purchase.
3. Give it to your conveyancer early. The certificate only does its job if the buyer's side has it at or before settlement. Hand it over with the rest of your sale file.
4. Diarise the 12-month expiry. If you have back-to-back projects, make sure the certificate is still live when each one settles, and renew before it lapses.
5. Feed the real post-tax number into your deal. The certificate protects your cash flow; it does not change what you owe. Keep modelling the exit with tax in mind in your flip ROI calculator and your full analysis so the profit you plan on is the profit after the ATO has had its share.

None of this is hard. It is free, it is online, and for a resident flipper it is close to automatic. The only way it hurts you is by surprise, which is exactly how it catches people who did not know the rule changed. Build the clearance certificate into your process once and it becomes a non-event, the way it should be, instead of the reason fifteen percent of your sale price is sitting with the ATO while your next deal goes to someone else.

This is general information only and is not tax, financial or legal advice. Foreign resident capital gains withholding rules, rates, thresholds and clearance certificate processes are set by the ATO and change over time. Confirm the current rules at ato.gov.au and get advice from your own registered tax agent or conveyancer about your residency and your specific sale before you act.