Threw Away These 6 Documents After Buying? You'll Pay Thousands Extra in CGT.

A lot of people buy an investment property, collect the keys, open a bottle of champagne, and consider the job done.

Ten years later, they sell. And that's when the accountant delivers the bad news.

You're paying tens of thousands of dollars more in capital gains tax than you should be. Not because the tax law changed. Not because you did anything wrong. Because six documents — some of them costing nothing to keep — went missing between your first email inbox and your third laptop.

Settlement is not the end of buying a property. It's the beginning of managing an asset. And these six documents directly determine how much CGT you pay when you sell, and how much cash the ATO gives back to you every single year while you hold it.

The last one on this list is the one that surprises people most. Almost nobody's heard of it. But it could be worth $3,000 to $5,500 a year to you.

Document 1: The exchange contract (both signatures)

Here's a trap I see constantly.

The contract you downloaded from your email, or the copy your lawyer forwarded — it might only have your signature on it. What you need is the fully executed exchange contract, signed by both buyer and seller.

Why does this matter so much?

The ATO calculates your capital gains tax starting from the date on the exchange contract, not the settlement date 1. These can be months apart.

Say you exchange on 1 May and settle on 1 August. Your CGT clock starts ticking on 1 May. If you sell the following June — more than 12 months after exchange — you qualify for the 50% CGT discount. That's half the tax, gone. Miss that date by a few weeks because you're working off the settlement date instead? You could lose thousands.

And for anyone thinking "my lawyer has a copy" — sure, maybe. But seven years from now when you're ready to sell, that law firm might have closed down. The selling agent has moved interstate. The conveyancer retired.

This contract is your CGT starting gun. Keep it somewhere permanent.

"The exchange contract is more important than the settlement statement for tax purposes," says Yan Zhu, Co-Founder of PremiumRea. "It's the one document that proves when your CGT clock started. Everything else flows from that date."

Document 2: Building and pest inspection report + receipt

Most buyers treat the B&P report as a pass/fail exercise. No active termites? No major structural cracks? Great, chuck it in the bin.

Bad idea.

In the ATO's eyes, the inspection fee — typically $450 to $550 in Victoria 2 — counts as part of your cost base. Your cost base isn't just the purchase price on the contract. It's every legitimate cost you incurred in acquiring the property.

The higher your cost base, the lower your taxable profit when you sell, the less CGT you pay.

A building inspection receipt isn't going to save you thousands on its own. But combined with every other acquisition cost, it adds up. And it was money you were entitled to claim anyway.

Don't throw it away.

Document 3: The settlement statement

This one comes from your conveyancer and it's the final accounting of every dollar that changed hands on settlement day.

It lists: stamp duty, council rate adjustments, water rate adjustments, legal fees, PEXA fees ($137.39), Victorian registration fees ($1,918), and every miscellaneous charge 3.

The big-ticket item here is stamp duty. On a $1,000,000 investment property in Victoria, stamp duty runs to $55,070 under the standard non-PPR rate 4. That's the single largest line item in your cost base apart from the purchase price itself.

When your accountant does your tax return, the settlement statement is the first document they'll ask for. If you can't find it, those costs vanish from your cost base and your taxable profit inflates accordingly.

Think of this as your property's birth certificate. You can change laptops, move house three times, switch cloud storage providers — this document comes with you.

One note that catches people out: the stamp duty you pay on purchase cannot be claimed as a deduction in the year you buy 5. It sits in your cost base and only reduces your CGT liability when you eventually sell. A lot of first-time investors assume they can write it off immediately. You can't. But losing the receipt means you can't claim it at all.

Document 4: Title insurance policy

Not many Australian property investors know about this one.

Title insurance costs around $700 to $1,000 as a one-off payment. It covers you for life 6.

What does it protect against? The previous owner did an unapproved extension without a building permit and council comes knocking. A neighbour disputes the boundary. Someone forges your title and sells your property out from under you. These things sound extreme, but they happen.

With older properties — and we predominantly buy 1970s-1980s brick veneer houses in Melbourne's southeast — the risk of undocumented modifications is real. Previous owners add sunrooms, convert garages, build sheds without permits. If that structure has been standing for over 7 years, council typically doesn't pursue it in Victoria. But "typically" isn't a guarantee.

The calculation is straightforward. In property investment, your downside risk has no floor. A boundary dispute or forced demolition of an illegal structure could cost $30,000 or more. Paying $1,000 to cap that risk is sensible arithmetic.

We recommend title insurance on every purchase we manage. The policy itself also forms part of your cost base — so keep the receipt.

Document 5: Professional service invoices

This is the one most investors completely overlook.

Buyer's agent fees. Conveyancing fees. These feel like service charges that disappear once the transaction closes. Nothing to do with tax. Right?

Wrong.

The ATO's position: any professional service fee incurred specifically to acquire an investment property can be included in the cost base 7.

Let's run the maths. A buyer's agent fee of $15,800 plus GST. Your marginal tax rate is 45%. When you sell, that invoice gets subtracted from your taxable profit. The CGT saving? Roughly $6,750.

That $15,800 invoice might be sitting in your email spam folder right now. Or maybe you paid in instalments and only kept one of the three receipts.

Go find them. All of them. They're real money.

"Every receipt from the acquisition process has a dollar value attached to it at sale time," says Yan Zhu, Co-Founder of PremiumRea. "The buyer's agent fee alone can save you nearly $7,000 in CGT if you keep the invoice. That's not a tax trick — it's basic cost base accounting that most people simply don't know about."

Document 6: Depreciation schedule (quantity surveyor report)

This is the big one. The one that pays for itself every single year you hold the property. And the one that most investors either haven't heard of or keep putting off.

A quantity surveyor visits your property after settlement and produces a detailed depreciation schedule. Cost: roughly $600 8.

The report breaks down into two parts.

Division 40 covers removable plant and equipment — air conditioning units, ovens, carpet, hot water systems, blinds. Each item has a specific depreciation rate and useful life defined by the ATO.

Division 43 covers the building structure itself. Residential buildings in Australia depreciate at 2.5% per year over 40 years.

Here's what that looks like in real terms. Take an $800,000 property where the building component is valued at $400,000. Division 43 alone gives you $10,000 per year in depreciation deductions. Add Division 40 equipment depreciation and your total deductions in the first few years typically run between $8,000 and $15,000 annually.

At a 37% tax bracket, that's $3,000 to $5,500 less tax per year. Every year.

You spend $600 once. You get thousands back annually for the life of the asset.

The numbers vary by property — older buildings have less Division 43 but often more Division 40 from recent renovations. Get your registered quantity surveyor to assess your specific situation. But the principle is the same: if you don't have the report, you can't claim the depreciation, and you're handing the ATO money that is legally yours to keep.

One caveat worth knowing: Division 40 depreciation you claim during the holding period gets added back into your capital gain when you sell. Division 43 does not. So there is a partial claw-back mechanism. But the time value of money — getting those deductions year after year rather than waiting until sale — almost always works in your favour. Speak to your accountant about the specifics.

How I organise all of this

Here's my actual system. Nothing fancy.

Every property gets a folder in Google Drive. Folder name: street address plus purchase year. Inside go scanned copies of all six documents.

Then a subfolder for ongoing records: annual rental income statements, maintenance receipts, loan interest statements, insurance renewals, property management invoices.

Your accountant handles the tax return. But the raw documents? That's your job. If they're not organised and accessible, your accountant is working blind and you're leaving deductions on the table.

You're not just buying a house. You're running an asset. Every asset needs its own file.

So — how many of these six documents do you actually have? If you're missing any, most of them can still be obtained or recreated. The exchange contract can be requested from your conveyancer's records. The settlement statement likewise. Title insurance can be purchased retrospectively in some cases. The depreciation report can be commissioned at any time during your ownership.

The sooner you get your paperwork sorted, the sooner you stop overpaying the ATO.