If your business turnover is under the Australian Taxation Office (ATO) threshold of $75,000, you are not legally required to register for GST. However, many sole traders and small business owners choose to do so anyway.

Voluntary registration is a strategic decision that can either save you money or create unnecessary administrative work. Here is everything you need to know to decide if it makes sense for your business in 2026.

The Basics: Mandatory vs. Voluntary Registration

• Mandatory Registration: Once your annual GST turnover (gross income) hits $75,000, you must register within 21 days.
• Voluntary Registration: If you earn less than $75,000, you have the option to register. Once you do, you are treated exactly like any other GST-registered business: you must collect GST on your sales and lodge Business Activity Statements (BAS).

When Voluntary Registration Makes Financial Sense

Registering voluntarily is often a “win” if your business model involves significant spending on equipment, materials, or services.

• Claiming Input Tax Credits: This is the biggest benefit. When you buy goods or services for your business that include GST, you can claim that GST back from the ATO as an “input tax credit.” If you are a consultant buying a $3,000 laptop, registering allows you to claim back $272.73 in GST—money that would otherwise be an unrecoverable cost.
• Business Credibility: Some larger corporate or government clients prefer dealing with GST-registered businesses because it signals professionalism and maturity. It also allows you to issue professional tax invoices that include a GST component.
• Level Playing Field: If your competitors are all charging GST, your prices may look cheaper by comparison if you don’t. However, if your clients are also GST-registered businesses, they can claim the GST back on your services. This makes your service “cost-neutral” to them while allowing you to benefit from the input tax credits mentioned above.
• Preparation for Growth: If you know your business is scaling quickly, registering early allows you to build the necessary accounting and invoicing systems into your workflow from day one, rather than scrambling to change your pricing and systems mid-year.

The Drawbacks to Consider

Before you sign up, be aware of the “cost” of voluntary registration:

• The Price Tag for Customers: Once registered, you must add 10% GST to your prices. If you sell directly to consumers (B2C), this might make you 10% more expensive than competitors who aren’t registered. If you can’t increase your prices, you’ll have to absorb the GST, which effectively cuts your profit margin by approximately 9%.
• Administrative Burden: Registration isn’t “set and forget.” You will need to lodge regular Business Activity Statements (BAS) with the ATO (usually quarterly). You must also maintain rigorous record-keeping to support every claim you make.
• Commitment Period: Once you register voluntarily, you generally cannot deregister for at least 12 months. This means you are locked into the GST system for a full year, regardless of your turnover.

How to Decide: The “Sweet Spot”

A good rule of thumb is to look at your business expenses. If you are regularly spending a significant amount on GST-inclusive business expenses (some experts suggest the “sweet spot” is over $3,000 in annual expenses), the GST refunds you receive will likely outweigh the cost of the extra administration.

If you are a service-based freelancer with minimal expenses (e.g., you work from home with only a laptop and internet), the administrative overhead of lodging BAS returns might not be worth the small amount of GST you could claim back.

Disclaimer: This information is for general guidance and does not constitute financial or tax advice. Because your individual tax situation is unique, it is highly recommended that you speak with your accountant before registering voluntarily. You can register for GST for free through the ATO’s Online Services for Business.