PropRetire

Capital gains tax calculator for a property sale

Work out the tax on selling an investment property, with the 50% discount, cost base indexation and the 30% minimum tax from 1 July 2027, and every step of the working.

The property

What the property cost beside what it is worth

The price, stamp duty and legal costs.

The sale

The property and its key on a hook, as when it sells

Agent, marketing and legal costs, as a share of the price.

Growth and inflation 3% growth, 3% inflation

Carries today's value to the day you sell.

Indexes the cost from 1 July 2027.

You

A payslip for your other income

Your taxable income apart from the sale, before tax. Enter 0 if none.

How is the tax on selling an investment property worked out?

The gain on a sale is added to your other income for the year you sign the contract, and taxed at your rates. From 1 July 2027, cost base indexation and a 30% minimum tax replace the 50% discount on the part of the gain made after that day. The gain up to 1 July 2027 keeps the discount.

The rule for the gain, by contract date, for an individual who owns the property
Contract signedRule for the gain
Before 1 July 202750% discount on all of it, after 12 months' ownership
From 1 July 2027, property bought before it50% discount on the gain to 30 June 2027, cost indexed after, 30% minimum tax can apply
From 1 July 2027, property bought after itCost indexed, 30% minimum tax can apply

The contract date counts, not settlement. A new dwelling, a company and a complying super fund follow other rules, which the post on indexation sets out. The calculator shows each step for your sale.

Updated

Where the rules come from