--- title: "What is the best age for cats to be desexed?" id: "4613" type: "post" slug: "best-age-to-desex-cat" published_at: "2026-07-01T10:17:20+00:00" modified_at: "2026-07-01T11:49:26+00:00" url: "https://rspcapetinsurance.org.au/pet-talk/best-age-to-desex-cat/" markdown_url: "https://rspcapetinsurance.org.au/pet-talk/best-age-to-desex-cat.md" excerpt: "If you’re welcoming a cat or kitten into your home, it’s important to ensure they’re desexed. Desexing is a routine procedure with meaningful health and behavioural benefits for cats — and it plays a critical role in reducing the number..." taxonomy_category: - "Care & training" --- [Pet Talk](https://rspcapetinsurance.org.au/pet-talk/) [Care & training](https://rspcapetinsurance.org.au/pet-talk/category/care-and-training/) What is the best age for cats to be desexed? Care & training # What is the best age for cats to be desexed? Written by our RSPCA Pet Insurance Team 1 Jul, 2026 - 5 min read If you’re welcoming a cat or kitten into your home, it’s important to ensure they’re desexed. Desexing is a routine procedure with meaningful health and behavioural benefits for cats — and it plays a critical role in reducing the number of unwanted cats in Australia. But when is the right time to have it done, and what are the legal requirements? In this guide, we’ll cover why cats should be desexed, the age the RSPCA recommends for desexing, the benefits of desexing before puberty, and Australian desexing laws for cats. **Table of contents** - [Why should cats be desexed?](#why-should-cats-be-desexed) - [What is the best age to desex a cat?](#what-is-the-best-age-to-desex-a-cat) - [Benefits of desexing before puberty](#benefits-of-desexing-before-puberty) - [Desexing laws for cats in Australia](#desexing-laws-for-cats-in-australia) - [Cost of desexing](#cost-of-desexing) - [How pet insurance can help support your cat’s wellbeing](#how-pet-insurance-can-help-support-your-cats-wellbeing) ## Why should cats be desexed? Desexing companion cats is considered an essential responsibility of pet ownership by both veterinary and animal welfare organisations. To desex a cat, a qualified vet performs a gonadectomy, which is a routine surgery to remove a male cat’s testicles (called ‘castration’) or a female cat’s uterus and ovaries, or just her ovaries (called ‘spaying’). After desexing, a cat can’t become pregnant or father kittens. The key reasons to desex include: - Preventing unwanted litters. - Reducing certain behaviours, including urine spraying, sexual behaviour, and roaming. - Minimising the risk of fighting and, therefore, cat fight injuries and related diseases such as feline immunodeficiency virus (FIV). - Preventing testicular, ovarian, and uterine disease, including cancer and infection. - Reducing the risk of mammary cancer. - Reducing the number of unwanted cats in shelters, pounds, and communities (thousands of cats are surrendered to the RSPCA each year, many due to unplanned breeding). ## What is the best age to desex a cat? The RSPCA recommends that kittens be desexed before four months of age — prior to puberty — provided your vet has assessed them as being in good health, at an appropriate weight, and adequately vaccinated. Historically, cats were usually desexed at around six months of age. However, this meant some kittens were already pregnant before being desexed. Extensive evidence shows that desexing before puberty is safe and provides both short- and long-term health and welfare benefits, while also helping to prevent unwanted litters. Kittens and cats adopted from reputable shelters are usually already desexed before rehoming, which is one of the significant advantages of adopting from a shelter. If your kitten hasn’t yet been desexed, speak with your vet to discuss the most appropriate timing for your individual pet. ## Benefits of desexing before puberty Having your cat desexed before four months of age offers several benefits over waiting until six months or later, including: - Eliminating the risk of unplanned pregnancies. - Significantly reducing the risk of mammary tumours in female cats (desexing before the first heat offers the greatest protective benefit). - Reducing sexually-driven behaviours such as urine spraying and roaming before they become established habits. - Faster and simpler recovery from surgery. - Preventing the need to spay cats when they’re in heat, heavily pregnant, or have uterine disease. ## Desexing laws for cats in Australia Several Australian states and territories have introduced mandatory desexing requirements for cats, with exemptions available for registered breeders. **Please note:** The information provided here is general in nature and shouldn’t be relied on as legal advice. For advice about your individual circumstances, please contact the relevant authority or seek independent legal advice. Requirements currently include: - **South Australia:** cats over six months must be desexed unless an exemption applies. - **Australian Capital Territory:** cats over three months of age must be desexed unless the owner holds a permit. - **Tasmania:** cats over four months of age must be desexed unless an exemption applies. - **Western Australia:** cats over six months must be desexed unless an exemption applies. - **Other states and territories:** requirements vary. In some local council areas, desexing is mandatory or an additional fee must be paid to own undesexed cats. Some councils offer discounted registration fees for desexed cats, providing a financial incentive even where desexing isn’t mandatory. It’s worth checking the requirements in your state or territory and local area, particularly if you’ve recently moved or adopted a cat who hasn’t yet been desexed. ## Cost of desexing The cost of desexing varies between clinics and is generally lower for male cats than female cats, as spaying is a more complex procedure. While there is an upfront cost, it’s worth weighing this against the long-term benefits — including a reduced risk of health conditions that can be costly to treat, and the avoidance of unplanned litters. ## How pet insurance can help support your cat’s wellbeing Desexing is an investment in your pet’s long-term health — but it won’t be the last. Ongoing vet care, unexpected illnesses, and accidents are all part of pet ownership, and the costs can add up quickly. Pet insurance helps manage those expenses, giving you the confidence to seek care when your pet needs it most. And if you choose [RSPCA Pet Insurance](https://rspcapetinsurance.org.au/) , your policy doesn’t just protect your pet — every policy helps support the RSPCA’s important animal welfare work across Australia. To learn more about how RSPCA Pet Insurance could support you and your cat, click [here](https://rspcapetinsurance.org.au/) . Or, if you’re ready to take the next step, you can fetch a commitment-free pet insurance quote [online](https://quote.rspcapetinsurance.org.au/) . ### **Disclaimer** As with any insurance, terms, conditions and exclusions apply. Please read the [Product Disclosure Statement](https://rspcapetinsurance.org.au/product-disclosure-statement/) to make sure this cover suits your needs. **References** [1] Government of South Australia. *Dog and Cat Management Act 1995* (SA). Available from: [https://www.legislation.sa.gov.au/](https://www.legislation.sa.gov.au/) [2] Government of South Australia. *Dog and Cat Management Regulations 2017* (SA). Available from: [https://www.legislation.sa.gov.au/](https://www.legislation.sa.gov.au/) [3] Australian Capital Territory. *Domestic Animals Act 2000* (ACT). Available from: [https://www.legislation.act.gov.au/](https://www.legislation.act.gov.au/) [4] Government of Western Australia. *Cat Act 2011* (WA). Available from: [https://www.legislation.wa.gov.au/](https://www.legislation.wa.gov.au/) [5] Tasmanian Government. *Cat Management Act 2009* (Tas). Available from: [https://www.legislation.tas.gov.au/](https://www.legislation.tas.gov.au/) ## FAQs ### What is desexing in cats? Desexing is the term commonly used in Australia to describe the surgical sterilisation of cats. The procedure permanently prevents cats from reproducing by removing their reproductive organs. In male cats this is called castration, while in female cats it’s called spaying (ovariohysterectomy or ovariectomy). After desexing, cats can’t become pregnant or father kittens. ### What’s the recommended age to desex a cat? The RSPCA recommends desexing kittens before four months of age — prior to puberty — provided your vet has assessed them as being in good health, at an appropriate weight, and adequately vaccinated. Desexing before puberty helps prevent unintended pregnancies, and extensive scientific evidence supports its safety and long-term health and welfare benefits. Delaying desexing until six months of age or later increases the risk of unintended pregnancies. ### What are the benefits of desexing a cat before puberty? Desexing before four months eliminates the risk of unplanned pregnancies, reduces the risk of mammary tumours in females, is associated with improved surgical outcomes, and supports a faster recovery compared to desexing at an older age. ### Is it mandatory to desex a cat in Australia? It depends on where you live. Several states and territories have introduced mandatory desexing laws for cats, with exemptions for registered breeders. South Australia, the ACT, Tasmania, and Western Australia all have requirements in place. It’s important to check the rules in your area. ### Can pet insurance help with the cost of desexing a cat? In most cases, standard pet insurance policies don’t cover routine procedures such as desexing. While you’ll typically need to budget for desexing yourself, pet insurance may help provide peace of mind by contributing towards vet expenses if your cat experiences an unexpected illness or injury in the future. If you’re considering pet insurance for your cat, [RSPCA Pet Insurance](https://rspcapetinsurance.org.au/) may be worth exploring. Not only do they offer customisable cover that can be tailored to your cat’s needs and your budget, but every policy also supports vital RSPCA animal welfare initiatives across Australia. As with any insurance, terms, conditions and exclusions apply. Please read the Product Disclosure Statement to make sure this cover suits your needs. [See more](https://rspcapetinsurance.org.au/faqs/) ## Related blogs [Why training is one of the best things you can do for your dog Jun 2026 - 7 min read Read blog](https://rspcapetinsurance.org.au/pet-talk/benefits-of-training-your-dog/) [How to choose the right dog harness for your pup Mar 2026 - 11 min read Read blog](https://rspcapetinsurance.org.au/pet-talk/how-to-choose-the-right-dog-harness/) [How to help your pet feel comfortable in a transport carrier Mar 2026 - 17 min read Read blog](https://rspcapetinsurance.org.au/pet-talk/how-to-help-your-pet-feel-comfortable-in-a-transport-carrier/)