A new business can look profitable on paper while still run short of cash because GST has been treated as income. That is why GST registration for new business owners deserves attention before the first major invoice goes out. Getting the timing, pricing and record-keeping right from the start makes BAS reporting far less stressful later.

GST is not an extra cost to your business when it is managed properly. It is a tax you collect on many sales and may claim back on eligible business purchases. The practical challenge is keeping it separate from your working cash, issuing correct invoices and lodging accurate BAS statements on time.

When GST registration is required for a new business

Most businesses must register for GST once their GST turnover reaches, or is expected to reach, $75,000 in a 12-month period. For non-profit organisations, the threshold is $150,000. This is not based on a financial year, and it is not simply a matter of waiting until annual sales have already passed the threshold.

You need to consider both your current GST turnover and your projected GST turnover. If a new contract, busy season or expansion means you reasonably expect to cross $75,000 over the coming 12 months, registration may be required then. Once you become required to register, you generally have 21 days to do so.

Some businesses have to register regardless of turnover. This includes taxi and ride-sourcing operators. If your work has an unusual structure, mixed income streams or significant one-off projects, it is worth checking the position before assuming the threshold does not apply.

GST turnover is also more nuanced than total money received. Certain sales, including input-taxed supplies, are treated differently, and the sale of a business capital asset may not count towards the threshold in the usual way. A rental property owner, for example, should not assume residential rent is handled the same way as trading income from a retail shop or contracting business.

Should you register voluntarily before $75,000?

You can choose to register for GST before you are required to. For some new businesses, that is sensible. For others, it creates administration without delivering much benefit.

Voluntary registration can suit a trade, consultant or NDIS provider that has substantial start-up costs, expects to grow quickly, or mainly works with GST-registered business clients. If you buy equipment, software, stock, tools or professional services with GST included, registration may allow you to claim eligible GST credits. It can also avoid changing your pricing part-way through a fast period of growth.

The trade-off is that you must add GST to taxable sales, keep stronger records and lodge BAS statements. If your customers are mostly private consumers, adding GST can make your price less competitive unless you absorb the cost. A sole trader providing low-cost services to households may be better off waiting until registration is compulsory, provided their turnover remains below the threshold.

Do not register simply because a customer asks whether you have an ABN. An ABN and GST registration are separate. You may have an ABN without being registered for GST.

How to register and choose the right settings

Before registering, make sure the foundations are in place. Your business structure, ABN, legal name and contact details should be correct. A mismatch between your bank account, invoices and tax records can create avoidable clean-up work later.

GST registration is completed through the appropriate government business registration channels, either directly or with help from your registered tax agent. You will need to select an effective date for registration and provide an estimate of your turnover. The effective date matters because it determines when you need to start charging GST and when you may begin claiming GST credits.

You will also need to choose an accounting basis for GST:

  • Cash accounting reports GST when you receive payment from customers or pay suppliers. It is often easier for smaller service businesses because it better reflects cash flow.
  • Accrual accounting reports GST when you issue an invoice or receive a supplier invoice, even if the money has not changed hands. It may suit businesses with larger receivables, more complex trading activity or particular reporting requirements.

For many small operators, cash accounting is the more practical starting point. It means you are less likely to owe GST on an invoice that a customer has not yet paid. However, the right choice depends on your turnover, payment terms and business model.

Your BAS reporting cycle also needs attention. Many small businesses report quarterly, but some report monthly or may have different arrangements. The key is to know your due dates early and build the process into your monthly routine rather than treating BAS as a once-a-quarter scramble.

Set up invoicing correctly from day one

Once registered, your invoices must show the right information. A valid tax invoice generally needs to identify your business, include your ABN, show the date and describe what was supplied. It must also make clear how much GST was charged. For invoices of $1,000 or more, additional customer details are generally required.

The simplest approach is to set up an invoice template in your accounting software before sending the first invoice. Check that GST is applied to the appropriate income items, your ABN displays correctly and your prices are shown consistently as GST-inclusive or GST-exclusive.

This last point catches many new business owners out. If you quote a customer $1,100 including GST, $100 of that amount belongs in your GST liability. Your actual sales income is $1,000. If you quote $1,100 plus GST, the customer pays $1,210. Be clear in quotes, proposals and price lists so there is no surprise at the invoice stage.

Not every sale has GST. Some supplies are GST-free, while others are input taxed. NDIS providers, health-related businesses and property owners can face specific rules depending on exactly what they supply. Do not apply GST by habit. Set up each income category correctly and revisit it when your services change.

Keep records that support your BAS

A clean BAS starts with day-to-day bookkeeping. Bank feeds and accounting software can save time, but they do not replace judgement. Every transaction still needs to be allocated to the right category and given the correct GST treatment.

Keep tax invoices and receipts for business expenses, particularly where you are claiming GST credits. The record should show the supplier, date, amount and GST component where applicable. A bank transaction on its own may not be enough to support every claim.

It also helps to separate business and personal spending from the beginning. Use a dedicated business bank account and, where possible, a business card for operating costs. If you pay a business expense personally, record it properly rather than leaving it buried in a personal transaction list.

A practical monthly routine is usually enough to keep things under control: reconcile the bank account, match receipts, review unpaid invoices, check payroll entries if you have staff, and look at the GST balance. This gives you an early warning of what may be due on your next BAS.

Common GST registration mistakes

The first mistake is waiting until turnover has already exceeded $75,000 without considering projected turnover. A growing business can be required to register earlier than expected, and late registration can create difficult discussions around whether GST should have been included in past invoices.

The second is treating all money in the bank as available to spend. Put aside the GST portion of customer payments in a separate savings account or track it clearly in your cash-flow plan. This is especially useful for seasonal businesses such as hospitality, retail and trades, where a strong month can create a larger BAS liability.

The third is claiming GST on purchases that are private, partly private or not supported by suitable records. A mobile phone, vehicle, home office cost or mixed-use expense may need an apportionment. Claiming the full amount because the purchase was made from the business account is not a reliable approach.

Finally, do not let software settings make decisions without review. Xero can make GST reporting more efficient, but only when chart-of-accounts codes, tax rates, payroll settings and reconciliations are kept tidy. A quick check each month is much easier than correcting a full year of transactions at tax time.

Make GST part of your operating routine

GST works best when it is built into how you quote, invoice, buy, pay and review results. It should not sit in the background until a BAS deadline arrives. Clear systems give you a more accurate view of sales, costs and cash available to run the business.

If you are unsure whether registration is required, whether voluntary registration makes commercial sense, or how a particular income stream should be treated, get the answer before issuing invoices. A small decision made early can keep your records tidy and your business on track as it grows.