Quick answer
Separate business and personal finances by giving the business its own bank account and card, paying yourself through a regular wage or documented drawings, and never covering private costs from business funds. It keeps your tax records clean, protects you from company-loan tax problems, and lets a lender see the business's real earnings.
Key points
- The ATO lists using one account for private and company spending as a common error, because it hides which costs are which
- Company money taken for private use can be treated as an unfranked dividend under Division 7A unless repaid or put on complying loan terms
- Lenders judge serviceability from the business's statements, so personal spending in the account distorts the picture
- A fixed owner pay run turns a messy account into a predictable one
- Sole traders are not a separate legal entity, but separate accounts still protect your records and borrowing
Plenty of owners start out paying for the ute, the groceries and the supplier from the same card. At the beginning it feels efficient. A few years on, it has become one of the commonest reasons a tax return takes weeks to prepare, a loan assessor frowns, and a perfectly healthy business looks shaky on paper.
Separating the two is not an accounting nicety. It affects tax, borrowing and your own ability to see how the business is doing.
Why does mixing the two cause trouble?
There are three separate problems, and each hits a different person.
For the ATO. Its own small business guidance names the use of a single bank account or credit card for private and company expenses as a common error, because it makes it hard to tell which expenses are which. Every unclear transaction is something you may need to justify, and a record that cannot be explained cannot be claimed with confidence.
For lenders. An assessor tries to work out what the business earns and what it can afford to repay. If the account also pays a mortgage, school fees and holidays, the assessor has to untangle them or assume the worst. Our guide on how lenders read your bank statements shows what stands out.
For you. You cannot tell whether the business is profitable if you cannot tell what it actually spent. Many owners feel permanently short of money without knowing why. The answer is often in the mix.
What is the Division 7A trap for company owners?
If you trade through a private company, this matters. The ATO’s integrity rules can apply when a company provides money or benefits to a shareholder or their associate in a way that avoids tax. If you take company money for personal use outside the rules, the amount can be treated as an unfranked dividend and taxed in your personal return at your marginal rate.
The ATO describes two ways a loan can be handled: repay it in full, or put it on complying terms with a written agreement. Both must be in place before the company’s tax return is due or lodged, whichever comes first. Common errors it lists include having no written complying loan agreement before the lodgment day and charging interest below the benchmark rate.
You do not need to memorise the detail, but you do need a rule of thumb: money leaves a company as a wage, a dividend or a documented loan, never as a casual transfer. Ask your accountant which fits, and read how to pay yourself as a business owner for the options side by side.
What about sole traders and partnerships?
A sole trader is not legally separate from the business. Your drawings are simply your income, and Division 7A does not apply in the same way. This sometimes leads sole traders to assume separation is pointless. It is not.
The tax rules still require you to identify business expenses and to keep records that show business purpose. GST registration means you need to account for what was claimed. And for borrowing, a clean business account is the thing that shows a lender the business has its own heartbeat. Our page on sole trader business loans covers how lenders assess this structure, and company vs sole trader for borrowing compares how each is viewed.
What are the six steps to separate your finances?
- Open a dedicated business account and card. All takings go in, all business costs come out. If you already have one, stop using any other for business.
- Set up a tax account. Move the GST and PAYG share of each sale there as it arrives, so BAS is never a surprise.
- Choose a pay method and automate it. A fixed fortnightly transfer, wage or drawing. The amount can change quarterly; the pattern should not.
- Pay private costs from private money. If you must use the business card for something personal, record it as a drawing or loan on the day, never leave it unexplained.
- Put the business in its own name on everything. Insurance, phone plans, subscriptions, vehicle registrations. It reduces confusion at tax time.
- Reconcile weekly. Match the account to your books. Anything odd gets sorted straight away.
If you are not sure which bank account type to open, business banking basics walks through the common choices. The whole idea works best alongside a simple records routine, which is the focus of how to keep clean business records.
How do you handle genuine overlap, like a home office or a work vehicle?
Some costs are partly private. The ATO expects a reasonable apportionment, supported by records, not a guess. Typical examples:
| Cost | How to treat it |
|---|---|
| Vehicle used for business and private | Keep a logbook or other records to support the business share |
| Home office running costs | Calculate the business-use share and keep the evidence |
| Mobile and internet | Split by actual business use, and keep a representative record |
| Meals and entertainment | Business purpose must be clear; many are private or limited |
Pay these from the account that matches the larger share, and have your accountant adjust at year end. The key is a consistent method that you can explain.
Why does this matter more once you borrow?
Because borrowing amplifies everything. A lender will check that the structure behind the application makes sense, that the account behaves like a business account, and that any guarantee from you is properly understood. If you are asked for a personal guarantee, the line between the business and your own finances matters even more, as a personal guarantee puts your own assets behind the debt. Our guide on business loans and personal guarantees goes into that trade-off.
Mixed finances can also cost you credibility in a smaller way. An assessor who has to ask what a regular large payment is will assume, until told otherwise, that it is a risk.
An illustrative example
A mobile mechanic trading as a sole trader earns about $240k a year. All income lands in a personal account that also pays the rent, groceries and a car loan. When the owner applies for $45k to buy a second van, the assessor sees a lot of cash going in but cannot tell the business costs from the private ones. The profit looks lower than it is and the application stalls while the accountant produces a reconciliation.
Six months later the owner has opened a business account, moved all takings into it, set a $2,200 fortnightly drawing and put the GST share in a tax account. A fresh application shows clean, steady statements, and the assessor can see the true earnings straight away. Nothing about the trade changed; only the record of it did.
Where to go from here
If you have separated your finances, you are in a good position to borrow, and a bank may well be the best place to start; banks are often the cheapest money and welcome tidy customers. If your bank has said no, or you want to check the alternatives, we can help.
Our enquiry takes about a minute and does not involve a credit check, so it will not leave a mark on your file. We do not send your details to a long list of lenders. A person on our team reads your situation and phones you. Please complete the form accurately, particularly your structure and how the business is paid, so we can suggest the right option the first time.
Frequently asked questions
Do sole traders need a separate business bank account?
There is no general legal requirement for a sole trader, since the business and the owner are the same legal person. But a separate account makes tax time, GST and loan applications far easier, because every business transaction is already isolated. Most lenders find a tidy business account easier to assess.
What is Division 7A and why does it matter?
It is a set of tax rules for private companies. If a company lends money to, or provides benefits for, a shareholder or their associate and the arrangement does not follow the rules, the amount can be treated as an unfranked dividend taxed at the recipient's marginal rate. A loan generally needs to be repaid or put on a complying written agreement before the company's tax return is due.
How should I pay myself from a company?
The usual routes are a wage through payroll with PAYG withholding and super, a dividend, or a commercial loan with a written agreement and repayments. Which suits you depends on your circumstances, so ask your accountant. What does not work is taking money ad hoc with no record.
What if I have already mixed everything together?
Start fresh from a clean date. Open the new accounts, move the business's income and payments across, and ask your accountant to sort the history, including any private spending paid by the business. Do not leave it to the end of the year.
Will a lender look at my personal accounts too?
Often yes, especially for owners who give a personal guarantee or borrow as a sole trader. Lenders may ask for personal statements, a position of assets and liabilities and tax returns. Keeping the two sets of accounts distinct makes each easier to read.
Does separating finances help me borrow more?
It can. Clear business statements show the real turnover and conduct of the business, and that can support a larger or cheaper facility. Mixed accounts can understate the business's earnings or raise questions about spending.