Capital Gains Tax Changes ( Federal Budget 2026)

Alright, let’s slow this right down because what’s being proposed here is one of the biggest shifts to capital gains tax in a long time — and it’s going to affect a lot of long-term investors.

The “grandfathering” shock

If you own assets bought before 19 September 1985 (so-called pre-CGT assets), you’ve traditionally been in a very lucky position:

No capital gains tax. Full stop.

That’s changing.

From 1 July 2027, those assets are no longer completely outside the system.

Instead, what happens is this:

Gains you’ve already built up before that date stay tax-free
But any growth after that date becomes taxable when you sell

So the tax-free status doesn’t disappear overnight… but it stops being “forever free growth” going forward.

The awkward bit: valuing everything on 1 July 2027

Here’s where it gets tricky.

To separate “old gains” from “new gains”, you effectively need to work out what your asset is worth on 1 July 2027. That number becomes your new starting point. Everything above it in future years gets taxed.
So that date becomes a line in the sand. And yes — that matters a lot more than it sounds.

How do you work out that value?

There are two ways:

1. Get a formal valuation

Pay someone to value the asset properly at that date.

2. Use a formula

A government-style estimate based on growth rates and holding period.

Neither option is perfect. Valuations can be costly and disputed. Formula's can be blunt and not reflect real-world quirks. So either way, there’s judgment involved — and that usually means room for disagreement later.

Why this gets messy (especially for real assets)

If you own things like:

private businesses
property
family companies
assets with goodwill or intangibles

Then this gets even more complicated.

Because suddenly you have to ask:

“What part of this value is pre-2027 and what part is post-2027?”

That’s not a question most people have ever had to answer in real time before selling something.

It also brings forward issues that usually only get sorted when you sell — like goodwill, brand value, and long-term growth assumptions.

The bigger policy shift

For decades, the idea has been simple: “If you owned it before 1985, you’re outside capital gains tax.”

That principle is now being softened. Not completely removed — but changed in a way that introduces tax into long-held assets going forward. And that’s a big philosophical shift in how Australia treats long-term wealth.

The new CGT system from 1 July 2027

Now zoom out.

From that same date, the broader CGT system also changes:

The 50% discount is gone
Replaced with inflation-adjusted indexation
Plus a minimum 30% tax on capital gains

So instead of simply halving your gain, the system now:

Adjusts for inflation
Then applies a minimum tax outcome

Three different worlds depending on timing

This creates three groups of assets:

1. Sold before 1 July 2027

Old rules apply — including the 50% discount.

2. Bought and sold after 1 July 2027

New rules apply — indexation + minimum 30% tax.

3. Bought before 1 July 2027 but sold after

Hybrid system — old growth + new growth treated differently.

This is where most complexity sits.

Transitional relief (the “split value” system)

For assets held before the change, part of the gain is still eligible for the 50% discount — but only up to the value at 1 July 2027.

After that, future growth is taxed under the new system.

So you effectively end up with:

pre-2027 gains (discounted)
post-2027 gains (indexed + minimum tax)

The 30% minimum tax

Here’s the big behavioural shift.

Even if your marginal tax rate is lower, the system lifts capital gains up toward a 30% floor.

So:

Low-income investors may pay more tax on gains than they used to
Higher-income investors may see less change

And some groups (like Age Pension recipients) are exempt.

A simple example (what this feels like in real life)

Let’s keep it simple.

You buy something for $4,000.

By 1 July 2027 it’s worth $14,000.

You sell it later for $35,000.

Under the new rules:

The first $10,000 gain is treated under the old system (discount applies)
The later $21,000 gain is adjusted for inflation and taxed under the new system
And the post-2027 portion must meet at least a 30% tax rate

So instead of one clean calculation, you now have two tax systems applied to the same asset.

What about super, small business, and homes?

Some good news in the middle of all this.

Your main residence is not affected
Small business CGT concessions stay in place
Super funds keep their existing CGT discount (around one-third)
Affordable housing concessions are also retained

So not everything is being rewritten.

What this really means

If you strip away all the mechanics, the direction is pretty clear: Australia is moving from: “Reward long-term holding with simple discounts” to: “Adjust for inflation, then apply a minimum tax framework”

And that changes how people think about:

timing of asset sales
long-held family assets
and the after-tax value of long-term investments

The bottom line

This isn’t just a technical tax tweak.

It’s a structural shift in how capital growth is measured and taxed in Australia. And the biggest practical challenge won’t be understanding the rules…It’ll be working out what your assets are actually worth on that one critical date — 1 July 2027 — because everything flows from there.