Business · Knowledge Hub

What are the small business CGT concessions?.

Reviewed 12 Oct 2026
Short answer. They are four concessions in the Income Tax Assessment Act 1997 that can sharply reduce, or remove, the capital gains tax on selling a qualifying small business: the fifteen-year exemption, a further small business reduction, a retirement exemption, and roll-over relief. Eligibility turns on tests about the size of the business and the assets and your circumstances, and they reward a structure set up well before the sale.

The four concessions.

Division 152 of the Income Tax Assessment Act 1997 holds four concessions that can apply to a capital gain on a small business, and they can stack. In short: the fifteen-year exemption can remove the gain entirely where the business has been held long term and the sale is connected with retirement or permanent incapacity. A further small business reduction can cut the remaining gain, and sits on top of the general discount, so a large part of a gain can fall away. A retirement exemption can set an amount aside, with superannuation rules where the person is younger. Roll-over relief defers the gain where the proceeds are reinvested in a replacement active asset within a set period, so it is a deferral rather than an outright saving.

The eligibility tests.

Getting to any of them means passing eligibility tests. Broadly, the business has to be small enough on a turnover or a net asset measure, the asset has to be an active asset of the business, and, where the sale is of shares or a trust interest, you have to hold a large enough stake. The detail of those tests, and the figures in them, is deliberately left to advice, because it is fact specific and the thresholds change.

Why the structure decides the outcome.

These concessions can be extraordinarily valuable, but they reward a structure set up well before the sale, and the vehicle matters. A gain made inside a company can be awkward, because the general discount does not apply to companies and the concession amount can be hard to get out to the shareholders without triggering more tax, so part of the benefit can be clawed back. Whether you qualify, and how to arrange ownership so you do, is a question for your accountant and lawyer together. We advise on business structuring with a sale in mind, and run the sale through our business sale and purchase service.

What to watch

The right structure has to be in place before the sale, not retrofitted after. Holding the business in the wrong entity can cost a concession worth far more than the cost of getting the structure right early.

Law referenced: Income Tax Assessment Act 1997, Divisions 115 and 152.

Disclaimer: This information is general only and is not legal, accounting, financial or tax advice. Laws and regulations change and this content may become outdated. Do not rely on it without obtaining professional advice tailored to your circumstances.

Want to keep more of the sale?.

Structure it for the concessions early, with CMK Legal and your accountant.