For many business owners, the decision to sell is one of the biggest events of their lives.
Yet a surprising number only start thinking seriously about tax once negotiations are already underway. By then, many of the most valuable planning opportunities have already narrowed.
It might not be glamorous, but you need to have an understanding of the nitty gritty details around tax before jumping in to a sale. In this updated 2026 guide, we’ll walk through how tax works when selling a business in Australia, including CGT, small business concessions, active assets, share sales versus asset sales, and the planning decisions that usually make the biggest difference.
What taxes do you pay when selling a business in Australia in 2026?
For most business owners, the main tax issue is Capital Gains Tax, usually referred to as CGT.
CGT applies when you sell a business, company shares or business assets for more than their cost base. The cost base broadly includes what you originally paid, along with certain costs associated with acquiring, improving, holding and selling the asset.
However, business sales are rarely taxed in one simple block. Different parts of the transaction can be treated differently depending on the structure of the sale and the assets involved. Equipment, trading stock, goodwill, intellectual property and real estate can all attract different tax treatment.
If you sell business assets directly, some proceeds may qualify for CGT treatment while others may be taxed as ordinary business income.
If you sell shares in a company instead, the gain is generally calculated on the shares themselves. In many cases, this creates a cleaner and potentially more tax-efficient outcome for the seller.
Your structure also matters. Sole traders, partnerships, trusts and companies are all taxed differently, which is one reason experienced advisers usually start discussing exit planning years before the business actually goes on the market.
Capital Gains Tax in Australia: how it works
CGT is not a separate standalone tax. Instead, the capital gain is added to your taxable income and taxed at your applicable rate.
At a high level, the calculation is relatively straightforward. You take the sale proceeds, subtract the asset’s cost base, and the remaining amount becomes your capital gain. Where business owners often get caught out is assuming the entire sale automatically qualifies for favourable CGT treatment.
In reality, the tax outcome depends heavily on what exactly is being sold and how the purchase agreement allocates the price. For example, goodwill may qualify for CGT concessions, while trading stock is generally taxed as ordinary income. Depreciating assets can also trigger balancing adjustments or depreciation recapture effects.
This is one of the reasons two businesses sold for the same headline price can end up producing very different after-tax outcomes.
Asset sale vs share sale: why structure matters
One of the biggest drivers of your final tax position is whether the deal is structured as an asset sale or a share sale.
In an asset sale, the buyer purchases specific business assets rather than the legal entity itself. This may include equipment, inventory, customer contracts, goodwill, intellectual property and premises.
Buyers often prefer this structure because they can avoid taking on certain historic liabilities tied to the company. For sellers, however, asset sales can create more complicated tax outcomes because different categories of assets may be taxed differently.
In a share sale, the buyer purchases shares in the company itself. The business continues operating through the same entity, just under new ownership.
For sellers, share sales are often simpler and potentially more tax-efficient because the gain is usually treated as a capital gain on the shares themselves. This can improve access to CGT discounts and small business concessions.
In practice, many transactions become a negotiation between the buyer’s preference for risk protection and the seller’s preference for tax efficiency.
The small business CGT concessions
Australia’s small business CGT concessions are some of the most valuable reliefs available to business owners. Where the eligibility conditions are met, they can significantly reduce the tax payable on a business sale.
Broadly speaking, the concessions are aimed at businesses below the relevant turnover or net asset thresholds. The detailed rules are technical, but the four main concessions are:
50% active asset reduction
This concession allows eligible business owners to reduce a capital gain on qualifying active assets by 50%. An active asset is generally one used in the course of carrying on a business, including certain intangible assets connected to the business.
Retirement exemption
Eligible business owners may be able to disregard capital gains up to the relevant lifetime limit under the retirement exemption. If you are under 55, the exempt amount generally needs to be contributed into a complying superannuation fund or retirement savings account.
Small business rollover
The rollover concession allows eligible business owners to defer capital gains where replacement active assets are acquired within the required timeframe. This does not permanently eliminate tax, but it can defer it until a later CGT event occurs.
15-year exemption
The 15-year exemption is potentially the most generous concession available. Where the conditions are met, eligible owners who are aged 55 or over and retiring, or who are permanently incapacitated, may be able to disregard the entire capital gain on the sale of qualifying business assets.
One of the key conditions is continuous ownership for at least 15 years.
How your business structure affects tax
Your business structure plays a major role in determining how sale proceeds are taxed. Sole traders and partnerships are taxed differently from companies, while trust structures add another layer again.
For incorporated businesses, there can sometimes be a difference between tax paid at the company level and tax paid when proceeds are ultimately distributed to shareholders personally. This is one reason extraction planning matters just as much as the sale itself.
Trust structures can also create both opportunities and complications depending on how ownership has been arranged over time.
In practice, there is rarely one universally “best” structure. The right approach depends on the business itself, the ownership history, future plans, and whether the owner intends to reinvest, retire or pass wealth into superannuation.
How to reduce tax when selling a business
The biggest mistake many owners make is leaving tax planning until the business is already under offer. Most of the meaningful planning opportunities happen much earlier.
The areas that usually have the biggest impact include:
- reviewing whether the transaction should be structured as shares or assets
- checking eligibility for small business CGT concessions well before negotiations begin
- ensuring business assets satisfy active asset requirements
- reviewing trust and ownership structures before a sale process starts
- coordinating timing around retirement, superannuation and other personal income
- understanding whether maximising the headline sale price actually improves the after-tax outcome
That final point is more important than many owners realise.
A higher sale price does not always translate into more money kept after tax once concession thresholds and eligibility rules are factored in.
State taxes and other considerations
Federal CGT rules usually receive the most attention, but sellers also need to think about stamp duty, GST treatment and state-based issues depending on the nature of the transaction.
For example, GST may not apply where the sale qualifies as the transfer of a going concern, provided the relevant conditions are satisfied.
Property-heavy businesses can also create additional complexity around landholder duty or property transfers.
Where businesses operate across multiple states, buyers will often carry out detailed due diligence around payroll tax, employee entitlements and state compliance obligations before completing a transaction.
The bottom line: selling a business tax-efficiently in Australia in 2026
Selling a business in Australia is one of those moments where tax planning can materially change the financial outcome.
The structure of the transaction, the condition of the business before sale, and your eligibility for CGT concessions can all significantly affect how much you ultimately keep.
The owners who usually achieve the strongest outcomes are the ones who start planning early. That means understanding the likely tax treatment before negotiations become serious, reviewing whether concessions are available, and bringing advisers into the process before key decisions are locked in.
A good accountant or tax adviser should not simply calculate the tax bill after the deal closes. They should help shape the structure early enough to improve the outcome.
If you are considering selling a business in 2026 or beyond, the earlier you understand the tax position, the more control you are likely to have over the final result.
