Quick answer
Mixing personal and business debt means using personal loans, cards or your home loan to fund the business, or letting the business pay personal debts. It makes tax records harder, hides the business's true performance from lenders, and puts more of your personal life at risk if the business struggles. The fix is gradual: separate accounts, clear records, and business-purpose finance for business needs.
Key points
- Mixing runs both ways: personal credit funding the business, and the business paying personal debts.
- Lenders struggle to see true business performance through mixed accounts.
- Tax becomes harder: only the business portion of mixed expenses is claimable.
- Untangling is usually a few months of steady habits, not a big bang.
- Common signs
- Shared cards, shared accounts, random transfers
- Tax rule
- Only the business portion is claimable
- Company money
- Division 7A applies to money taken out
- Fix
- Separate, document, refinance if needed
Very few owners set out to mix their personal and business debt. It happens a little at a time. A personal card covers a supplier in a pinch. The home loan redraw pays for a new trailer. The business account pays the family’s car loan because there happened to be money in it that week. Three years later, the business’s finances and the household’s finances are one big knot.
This page is about recognising that knot, understanding why it matters, and starting to loosen it.
What does “mixing” actually look like?
It runs in two directions.
Personal credit funding the business:
- personal credit cards carrying business costs
- a personal loan used to buy stock, a vehicle or equipment
- a redraw or top-up on your home loan spent on the business
- buy-now-pay-later used for business purchases
The business paying personal debts:
- the company account paying your home loan or car loan
- business income used to clear a personal card
- a company “lending” money to the director with no paperwork
Both are extremely common, and both cause the same kinds of problems.
Why does mixing matter?
It clouds what the business really earns
A lender assessing your business wants to see what comes in and what goes out for business reasons. When the business account is also paying household bills — or when business costs are hidden on personal cards — neither picture is clear. The business can look weaker or stronger than it really is, and neither helps you.
It complicates tax
The ATO says that for mixed expenses, “you can only claim the portion that is used for your business”, and that you must have records to prove it. Mixed debt means mixed interest, mixed fees and mixed repayments. Your accountant can untangle it, but it takes time — and the time costs you.
It can trigger company tax rules
If you run a company and it pays personal debts for you, the ATO’s Division 7A rules may treat those payments as dividends unless they’re repaid or put on a complying loan agreement by the company’s lodgment day. Our page on borrowing from your own company explains more.
It moves business risk into your personal life
When business costs are carried on personal credit, a bad patch in the business becomes a personal credit problem. Missed payments on a personal card or loan show up on your personal file, affecting everything from the next business loan to your home loan.
How do lenders view a tangle?
| What a lender sees | The question it raises |
|---|---|
| Personal cards near limit, business account healthy | “Is the business actually funding itself?” |
| Business account paying a mortgage | “What does the owner really take out of the business?” |
| Round-number transfers back and forth | “Which way is money flowing, and why?” |
| A director’s loan account with no records | “Is there a Division 7A issue here?” |
| Clean business account, regular drawings | Nothing — this is what they want |
None of these is a deal-breaker on its own. Past credit issues and messy records are considered case by case. But every unanswered question slows things down. If you’d like an experienced person to look at your situation, start an enquiry and tell us what’s mixed where.
How do you start untangling?
Most owners untangle over a few months, not a weekend:
- List every debt — personal and business — with a note of what it actually funded.
- Set up a clean business account if you don’t have one, and move all business income and costs there.
- Pay yourself a set amount on a regular day. Our guide on paying yourself explains the options.
- Stop new mixing before fixing old mixing.
- Talk to your accountant about any director loans or personal debts that funded the business.
- Consider refinancing business-related debt sitting on personal credit into a business-purpose loan — see refinancing business debt off personal cards.
The money-mixing check turns this into eight quick questions and gives you a tailored list, and untangling finances before borrowing goes step by step.
Illustrative example: A husband-and-wife building company has been paying the family’s car loan from the company account, while the owners carry supplier costs on two personal cards. Their accountant flags a Division 7A issue. Over six months they stop the car loan payments from the company, document the director’s loan account, move suppliers to a business line of credit and pay down the personal cards. Their next loan application is far simpler.
What about the home loan?
Using home equity for the business is one of the biggest forms of mixing, because it ties the business’s fortunes to the roof over your head. It can be the right decision — but it should be a deliberate one, ideally with the borrowing structured and documented as business debt. Read home equity for business before you draw on the house.
Is some overlap unavoidable in a small business?
Yes, and lenders know it. A sole trader’s ute that also does the school run, a phone used for both, a home office — small businesses live with some overlap. The aim isn’t a perfect wall; it’s a clear, consistent record of which part is which. Use one sensible method for shared costs (your accountant can suggest one), apply it every month, and keep the big items — loans, cards, income — firmly on one side of the line or the other.
Get help separating the threads
You don’t have to sort out every knot before talking to us. The enquiry takes about 60 seconds and there’s no credit check. We never sell or spray your details to a crowd of lenders — one specialist looks at your situation and calls you. Be as accurate as you can about what debt you have and what it funded; that’s exactly what lets us find the right structure first time.
Frequently asked questions
Is it illegal to mix personal and business money?
For a sole trader, mixing isn't illegal, but you must be able to identify private payments and expenses. For companies, partnerships and trusts, business.gov.au says a separate business bank account is required for tax purposes, and company money taken out personally can be caught by Division 7A.
How do lenders react to mixed finances?
They ask more questions and may take longer, or be more cautious, because they can't easily see what the business earns and spends. Clean statements are one of the simplest ways to strengthen an application.
Can I consolidate personal and business debt into one loan?
We only arrange business-purpose finance. Where debt genuinely funded the business, it may be possible to refinance it into a business loan. Personal debts for personal purposes should stay with a consumer lender.
Where do I start untangling?
Open or tidy up a business bank account, move every business payment through it, pay yourself a regular amount, and list every debt with what it actually funded. Our money-mixing check gives you a quick starting point.
Does it matter if I'm a sole trader?
Legally you and the business are one person, but separating the money still matters for tax, for your records and for any lender who needs to see what the business is doing.