A Practical Guide to Small Business Capital Gains Tax Concessions

March 24th, 2026 Business Solutions News and Advice

For many Australian small business owners, selling or restructuring a business is a major milestone. It can unlock capital for retirement, fund future growth or support succession planning. It can also trigger a significant capital gains tax (CGT) outcome if planning has not been done early.

Capital gains tax is often one of the largest tax exposures a business owner will face. The good news is that Australia's small business concessions provide opportunities to reduce, defer or even eliminate CGT on eligible business asset sales. When applied correctly, these tax incentives are a powerful tool for wealth creation, not just a compliance requirement.

This guide explains how small business CGT concessions work, who may be eligible and how the tax benefit is commonly applied. Get clarity on these tax relief options before entering into a sale, restructure or transition.

WHAT IS THE CAPITAL GAINS TAX, AND HOW DOES IT APPLY TO SMALL BUSINESSES?

CGT applies when an asset is disposed of, and a gain is realised. The capital gain is generally the difference between what you receive for the asset and its cost base, adjusted for factors such as improvements and depreciation. That assessable capital gain is included in assessable income for the relevant income year unless a concession applies.

For small businesses, CGT often arises when selling business assets such as commercial property, goodwill, shares or trust interests. It can also be triggered during restructures or changes in ownership, where assets are transferred rather than sold to a third party.

Not all assets qualify for small business CGT concessions. The rules focus on assets used in the course of carrying on a business, not personal assets or passive investments. Timing also matters. Ownership periods, changes in use and temporary absences from business use can all affect eligibility, including whether specific timing-based provisions, such as the CGT 6-year rule, may apply in certain circumstances.

WHO IS ELIGIBLE FOR SMALL BUSINESS CAPITAL GAINS TAX CONCESSIONS?

Determining how CGT applies starts with understanding eligibility. Simply being a small business owner does not automatically qualify you for the concessions.

At a high level, eligibility requires meeting either the small business entity test or the net asset value test. A small business entity generally has an aggregated turnover of less than $2 million, including the turnover of connected entities and affiliates. Alternatively, the net asset value test requires total net assets of no more than $6 million across the business group.

The asset being sold must also satisfy the active asset test, meaning it has been used or held ready for use in carrying on a business for the required period.

Where assets are held through companies or trusts, additional ownership and participation rules apply. These include identifying CGT concession stakeholders and applying connection and control rules. These requirements are technical and frequently misapplied, which is why professional advice is essential.

WHAT RECORDS DO YOU NEED TO KEEP FOR CGT PURPOSES?

Accurate records are critical when applying small business CGT concessions. Without clear documentation, even legitimate claims may be challenged.

Key records include:

Contracts for the acquisition and disposal of CGT assets
Evidence of ownership dates and consideration paid
Cost base calculations and adjustments
Records of capital improvements
Depreciation schedules for depreciating assets
Documentation showing active business use

Records should also demonstrate how and when an asset was used in the business to support the active asset test.

Strong record-keeping not only supports compliance with the Australian Taxation Office (ATO) but also provides clarity when planning a sale or restructure. Accessing professional business support services can help small businesses put the right foundations in place well before CGT becomes an issue.

WHAT SMALL BUSINESS CGT CONCESSIONS ARE AVAILABLE?

There are four core small business CGT concessions available under Australian tax law. These concessions can be applied individually or in combination, provided eligibility requirements are met.

Concessions include the:

Small business 15-year exemption
50% active asset reduction
Small business retirement exemption
Small business rollover

The concessions are generally applied in a specific order, and the sequencing can materially affect the remaining capital gain. Understanding how they interact is critical to achieving the best outcome.

WHAT IS THE SMALL BUSINESS 15-YEAR EXEMPTION, AND WHEN CAN IT BE CLAIMED?

The small business 15-year exemption is the most generous CGT concession available. Where it applies, the entire capital gain can be disregarded.

To qualify, all of the following conditions must be met:

The business has continuously owned the CGT asset for at least 15 years
The asset is active
The individual disposing of the asset is aged 55 or over and retiring, or is permanently incapacitated

If the asset is owned by a company or trust, additional rules apply regarding significant individuals and concession stakeholders.

For long-term business owners, this exemption represents a powerful planning opportunity. With early structuring and careful management of ownership and asset use, it can eliminate CGT entirely on exit.

HOW DOES THE SMALL BUSINESS 50% ACTIVE ASSET REDUCTION WORK?

The 50% active asset reduction allows eligible small businesses to reduce the remaining capital gain by half. This concession applies separately from the general CGT discount.

Individuals and trusts may be eligible for both concessions, while companies can access the active asset reduction even though they do not qualify for the general CGT discount. In practice, this concession often delivers substantial tax relief where the 15-year exemption does not apply.

WHAT IS THE SMALL BUSINESS RETIREMENT EXEMPTION?

The small business retirement exemption allows capital gains of up to $500,000 per individual to be disregarded over a lifetime.

If the individual is under 55, the exempt amount must be contributed to superannuation as a non-concessional contribution. If the individual is 55 or over, there is no requirement to contribute the amount to super.

This concession is commonly used as part of succession planning or partial exits, allowing business owners to extract value from their business in a tax-effective way.

Contribution limits, timing rules and superannuation strategy all need careful consideration. Business owners partnering with a professional to plan their taxes will better align their CGT retirement exemption claims with broader retirement and wealth strategies.

HOW DOES THE SMALL BUSINESS ROLLOVER CONCESSION DEFER CGT?

The small business rollover concession allows a capital gain to be deferred when a business owner acquires a replacement asset.

Under the rollover:

The capital gain is deferred, not eliminated
A replacement active asset must be acquired within the required timeframe
The deferred gain is effectively rolled into the cost base of the replacement asset

This concession is often used to support reinvestment, business expansion or restructuring. It can provide cash flow flexibility while allowing the business to continue growing.

If the replacement asset is later disposed of, the deferred capital gain may crystallise unless another concession applies.

WHAT IS THE CORRECT ORDER FOR APPLYING SMALL BUSINESS CGT CONCESSIONS?

The order in which CGT concessions are applied matters. In most cases, the general sequence is:

Apply capital losses
Apply the general CGT discount, if available
Apply the 50% active asset reduction
Apply the retirement exemption or rollover

Getting the order wrong can limit flexibility or lead to unintended outcomes, which is why professional support is critical when dealing with significant capital gains.

WHAT ARE THE KEY RISKS AND ATO FOCUS AREAS FOR SMALL BUSINESS CGT CONCESSIONS?

The ATO continues to focus on small business CGT concessions as a compliance risk area. Common risk areas include:

Incorrect classification of active assets
Misapplication of affiliate and connection rules
Failure to meet ownership or participation requirements
Inadequate documentation
Inconsistent treatment across income years

Errors in these areas can lead to denied concessions, amended assessments and penalties. Proactive advice and robust documentation significantly reduce these risks.

BEGIN MAXIMISING YOUR SMALL BUSINESS CGT CONCESSIONS

Small business capital gains tax concessions offer substantial opportunities, but they are not one-size-fits-all. Eligibility, timing, structure and documentation all play critical roles in determining the final tax outcome.

With the right planning, CGT concessions can support confident asset sales, smooth business transitions and long-term wealth creation. Without it, they can quickly become a source of stress and uncertainty.

Wilson Porter works with small business owners across Sydney and Australia to provide end-to-end CGT strategy, compliance and structuring support. Our team integrates CGT planning with broader tax, business advisory and wealth strategies to deliver clarity at every stage of the business lifecycle.

Discover how Wilson Porter can help your business access small business CGT concessions and move forward with confidence.