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HomeCapital Gains Tax Calculator
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Estimate your potential capital gains tax before you sell.

Whether you're selling property, shares or a business asset, get a clearer picture of your potential tax liability, and what it could mean for your next move.

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Client Retention Rate
20+ Years
Helping Australians Plan Before They Sell

Work out your estimated CGT

Fill in the details below - your estimate updates automatically.

Used to estimate the marginal tax rate that applies to the gain.

Your Estimate

$0

Estimated additional tax on this sale

  • Capital gain (before discount)$0
  • CGT discount applied$0
  • Net taxable gain$0
  • Effective rate on the gain0%

This is an estimate only, based on simplified 2025-26 resident individual tax brackets plus a flat 2% Medicare levy, or a flat 25% company tax rate. It excludes offsets, prior year losses, the Medicare levy surcharge, HECS/HELP repayments and exemptions that may apply to you. It is not tax advice.

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What do your results mean?

Your estimate is the starting point.

Your result can help you understand the potential tax impact of selling, but your actual position may depend on factors the calculator can't fully assess.

Selling property?

Understand whether your main residence exemption, rental history or ownership structure could affect the outcome.

Selling a business?

The business structure and the assets being sold can materially change the tax treatment.

Selling investments?

Consider holding period, capital losses and other investments when assessing your overall position.

Why use it

Why Use the SBX Capital Gains Calculator?

Know your potential tax before you sell

Get an estimate of your capital gain and potential tax liability before you commit to a sale.

Understand what affects your CGT

See how purchase price, eligible costs, ownership, holding period and other factors can change the outcome.

Plan around the tax, not after it

A CGT estimate can help you think through timing, ownership structure and your broader financial position before making a major move.

Know when you need professional advice

Your actual CGT position may depend on exemptions, previous capital losses, property use, business structure and other circumstances.

How it's calculated

How to Calculate Capital Gains Tax?

Working out capital gains tax isn't just one number, it depends on how long you've held the asset, what you paid for it, what it cost to sell, and your total taxable income for the year. Your potential capital gain generally starts with four things:

  1. 01

    Sale price

    What you received when you sold the asset.

  2. 02

    Cost base

    What you paid, plus eligible costs associated with buying, owning and selling it.

  3. 03

    CGT discount

    If you're eligible and have held the asset for more than 12 months, you may get a 50% discount.

  4. 04

    Your taxable income

    The discounted capital gain is generally added to your taxable income and taxed at your marginal rate.

Our calculator brings these factors together to give you an estimated CGT figure in minutes.

That's exactly what our capital gains calculator does in the background, you enter the details, and it works out the figures instantly.

FAQs

Capital Gains Tax FAQs