Changing Business Structure From Sole Trader To Partnership: A Legal Guide

Changing from a sole trader to partnership means setting up a new business structure with at least one other person, with its own ABN, its own tax return and shared ownership of the business you built. You can’t add a partner to your sole trader ABN. You start a partnership, then move the business into it.

Most people put this off because it feels like paperwork. It isn’t, really. The registrations take an afternoon. The hard part is agreeing who owns what and what happens if it goes wrong, while you and your future partner still like each other.

Sole trader vs partnership: what actually changes when you switch?

A sole trader is one person trading in their own name. Legally, you and the business are the same thing. A partnership is two or more people carrying on a business together with a view to profit. That definition comes from the partnership Act in each state, not from any registration.

That last point catches people out. You don’t “register” a general partnership as a structure. If you and a mate are sharing the work and splitting the profit, the law may already treat you as partners, paperwork or not.

Here’s the side-by-side view of what changes.

	Sole trader	General partnership
Owners	You alone	2 or more partners (people or entities)
Separate legal entity?	No	No
Personal liability	Unlimited, for your own debts	Unlimited, joint and several, for every partner’s business debts
ABN and TFN	Your individual TFN, your ABN	New partnership ABN and partnership TFN
Tax return	Business income goes in your individual return	Partnership return reports income; each partner pays tax on their share
Decision-making	You decide	Shared; each partner can bind the business in ordinary dealings
Profit split	All yours	Per the partnership agreement, or equal by default
Superannuation	Your own voluntary contributions	Same; partners aren’t employees, so no super guarantee for partners
Set-up cost	Lowest	Low, plus the cost of a proper agreement
When it ends	When you stop trading	On dissolution, or when a partner leaves or dies, unless the agreement says otherwise

Neither structure protects your house. That’s the line most comparisons bury. If limiting your personal liability is the reason you’re restructuring, a partnership is the wrong destination. Skip to the alternatives section below.

Partnership law sits with the states and territories, and business.gov.au lists the partnership Act for each one. The rules are close to identical across Australia for an ordinary partnership.

Is moving from sole trader to partnership the right call?

Partnerships work best when two people are genuinely running the business together. Think two physios sharing a clinic, a builder bringing a co-owner into the business, or a couple who both work in an online store.

When a partnership makes sense

• You both work in the business day to day and want an equal say in how it runs.
• You want to split profits so each person is taxed at their own marginal rate.
• The business carries low liability risk, or you hold good insurance for the risks it does carry.
• You want something cheaper and simpler to run than a company, with fewer ASIC obligations.

When to rethink it

• Your new person is an investor, not an operator. Someone who wants a slice of profit without doing the work fits better as a shareholder in a company or a limited partner, not a general partner.
• You’re growing fast or taking on bigger contracts. More revenue means more exposure. Unlimited liability shared with someone else gets scarier as the numbers climb.
• You want equity to vest over time. Partnerships handle “earn your share over three years” badly. Companies handle it with a share vesting arrangement.

Here’s a myth worth killing: a partnership doesn’t “distribute liability”. You don’t get half the risk. You get your risk plus your partner’s.

How do you change from sole trader to partnership, step by step?

Do these in order when you move from sole trader to partnership. Founders who register first and negotiate later end up renegotiating with an ABN already live and invoices already going out.

1. Agree the deal before anything else

Sit down and settle ownership percentages, profit share, drawings, hours, who decides what and what each person contributes. Put a value on what you’re bringing in. Your client list, brand and equipment are worth something, and your partner needs to know whether they’re buying in or being gifted a share.

2. Sign a partnership agreement

Get the deal in writing and signed before you start trading together. A partnership agreement template gives you the standard clauses fast. We cover what to include for a converting business further down.

3. Apply for a partnership ABN and TFN

The partnership applies for its own ABN through the Australian Business Register, listing every partner. You can request the partnership TFN in the same application. If you want it handled for you, register your partnership ABN through Lawpath.

4. Register for GST and PAYG withholding if needed

Your sole trader GST registration doesn’t carry over. The partnership must register for GST once its GST turnover reaches $75,000, or is expected to. You have 21 days from that point. If the partnership will employ staff, it registers for PAYG withholding under the new ABN too.

5. Move your business name to the partnership

Business names are registered against an ABN, so yours has to move. The process runs through ASIC Connect, not the ABR. As the current holder, you select the option to transfer the name and ASIC emails you a transfer number. The partnership then registers the name using that transfer number and its new ABN, and pays the registration fee.

Don’t sit on the transfer number. It expires, and if it lapses the name goes back into the pool for anyone to register. If you’re starting with a fresh name instead, register a business name for the partnership. Trading under the partners’ full names (“Nguyen & Patel”) needs no business name at all.

6. Open a partnership bank account and new accounting file

Every dollar of partnership income should land in an account in the partnership’s name. Set up a fresh file in Xero or MYOB under the new ABN. Then update your payment gateways, invoices and email signatures, because one stray invoice on the old ABN creates a reconciliation headache later.

7. Transfer contracts, licences, staff and insurance

Your existing contracts are with you personally. The partnership isn’t a party to any of them. You have three ways to fix that:

• Novation: all three parties agree the partnership steps into your shoes, rights and obligations included. A deed of novation is the standard tool for leases, supply deals and long client contracts.
• Assignment: you pass across the benefits, like the right to be paid, but the obligations stay with you. Useful in a pinch, but it leaves you on the hook.
• Re-papering: sign fresh contracts in the partnership’s name. Slower, but it’s a chance to fix the terms you’ve regretted for years.

Licences and permits deserve their own check. Many are issued to you as an individual and won’t transfer. Employees move to a new employer (the partnership), so they need new employment contracts, and payroll, super and workers compensation all run under the new ABN. Ask your broker to re-issue insurance policies in the partnership’s name before the switchover date, not after.

8. Wind up the sole trader side properly

If you won’t run anything else as a sole trader, cancel your old ABN. The ABR expects that within 28 days of stopping. Lodge a final BAS if you were registered for GST. Your individual tax return for that year reports sole trader income up to the changeover date and your partnership share after it.

Keep a separate sole trader activity alive? Then keep that ABN, but draw a clear line between the two businesses in your books.

What happens to your assets and tax when you bring in a partner?

This is the part of going from sole trader to partnership that most guides skip, and it’s where the surprise bills come from.

When a partner joins, they get an interest in the business assets. If you contribute your goodwill, equipment or vehicle to a 50/50 partnership, you’ve effectively disposed of half of each asset. That’s a CGT event for capital assets like goodwill, and a balancing adjustment for depreciating assets.

Many founders assume a restructure roll-over makes this tax-free. Usually it doesn’t. The small business restructure roll-over only applies when ultimate economic ownership of the assets doesn’t change. Bringing in a new partner changes it by definition.

Other relief can still help. The small business CGT concessions may reduce or wipe out the gain on goodwill if you pass the eligibility tests. Depreciating assets in a small business pool have a separate roll-over option when a sole trader takes on a partner. Your accountant should model both before you sign, because the “obvious” path isn’t always the cheapest one.

After the switch, the tax rhythm changes too:

• The partnership lodges its own return each year but pays no income tax itself.
• Each partner reports their share of net partnership income (or loss) in their individual return.
• Partners take drawings, not wages. A “salary” to a partner is a profit allocation, so PAYG withholding and super guarantee don’t apply to it.
• Expect PAYG instalment notices for your share once the ATO sees the new income pattern.

Timing helps. Switching on 1 July keeps your sole trader year and partnership year clean, with no split-year apportioning.

What goes in a partnership agreement when you’re converting an existing business?

Generic agreements cover names, addresses and dispute resolution. A converting business needs more, because one partner arrives with a business and the other doesn’t. Without an agreement, the state Partnership Act applies, and its defaults are blunt: equal profit shares regardless of capital, no salary for any partner, and any partner can bind the firm in ordinary business.

Make sure yours covers these points:

• What you’re contributing and at what value. List goodwill, equipment, stock and IP, and say whether each is sold to the partnership, contributed as capital or licensed.
• Who owns pre-existing IP. Your logo, website content and systems. If the partnership should own them, document it with an assignment of intellectual property. If you want them back on exit, licence them instead.
• Profit share and drawings. Ownership and profit share don’t have to match. One partner working full-time might take a larger share or a set drawing before the split.
• Spending and signing limits. Set a dollar threshold above which both partners must sign. This is your main protection against a partner binding you to a contract you’ve never seen.
• Exit, death and buy-out. Set a valuation method, notice period and who can buy whom out. Include a duty to cooperate in cancelling the partnership ABN and registrations.
• Restraints and confidentiality. Spell out what happens to clients if one of you walks.

What we see in Lawpath consultations

Lawpath’s lawyers and accountants talk to a steady stream of business owners changing structure, including plenty moving from sole trader to partnership. A few patterns come up again and again.

The licence trap

In regulated industries like childcare and disability support, approvals sit with the individual or entity that applied. Owners restructure first and then discover the approval doesn’t follow. Contact the regulator before you change anything, and ask whether the new entity needs a fresh application, how long it takes and what it costs.

The zombie partnership ABN

We regularly hear from former partners whose old partnership ABN is still active years later. It keeps generating lodgement notices, and one ex-partner can’t easily cancel it alone. Write the wind-up duties into your agreement now, while you’re on good terms. Our guide to exiting a partnership agreement covers the rest.

Closing the old accounts too early

Clients still pay old invoices for weeks after a restructure. Our accountants tell owners to keep the sole trader bank account and accounting file open, with live feeds, until the last receipts are reconciled. Those receipts belong in your final sole trader figures, not the partnership’s.

Treat it as a new entity, not an update

Our lawyers advise owners to treat a restructure as a change of entity and update every customer and contractor agreement. Many take the chance to re-paper on better terms rather than novating old ones. Subcontractor agreements are a common gap, especially the indemnity clauses.

The conversation that ends in a company

Plenty of “I want to bring in a partner” consultations finish with a company instead. When the new person wants ownership and the existing owner wants liability protection, issuing shares in a company (sometimes vesting over time) solves both problems. A partnership solves neither.

Can two sole traders work together without becoming a partnership?

Yes. Two sole traders can collaborate on jobs, share an office or refer work to each other while keeping their own ABNs. The key is that each invoices their own clients and keeps their own profit. A written collaboration or joint venture agreement sets out who does what.

Watch the wording, though. Call each other “partners” on your website, pool income and split the profit, and you may have created a partnership by conduct. Then every partnership rule applies, including shared liability. Our lawyers flag this when reviewing collaboration documents that use the word “partnership” loosely.

Your realistic options, side by side:

• Two sole traders with a collaboration agreement: keep separate businesses, share specific projects.
• General partnership: one shared business, shared control, shared unlimited liability.
• Limited partnership: at least one general partner with unlimited liability, plus passive limited partners whose liability is capped at their contribution. Registered with your state government, not ASIC. Rare for small businesses.
• Company: a separate legal entity with limited liability, shareholders and more compliance. The usual answer when risk or outside investment is the driver.

Our breakdown of the different types of partnerships goes deeper on limited and incorporated limited partnerships.

Frequently asked questions about moving from sole trader to partnership

Can I add a partner to my sole trader ABN?

No. A sole trader ABN belongs to one individual. To go from sole trader to partnership, the partnership applies for its own ABN listing all partners. You then cancel your sole trader ABN, or keep it if you’ll still trade separately.

What is the difference between a sole trader and a partnership?

A sole trader is one person running a business in their own name. A partnership is two or more people running a business together and sharing the profit. Neither is a separate legal entity, but a partnership has its own ABN, TFN and tax return, and partners are liable for each other’s business debts.

Do I need a written partnership agreement?

It isn’t legally required, but you’d be mad to skip it. Without one, your state’s Partnership Act sets the rules, including equal profit shares no matter who built the business. A written agreement lets you set your own terms on profit, control and exits.

Does a partnership need to register with ASIC?

A general partnership doesn’t register with ASIC as a structure. It gets an ABN from the Australian Business Register. ASIC only comes in if the partnership registers a business name. Limited partnerships register with the state or territory government.

Can I keep my business name when I change to a partnership?

Yes. In ASIC Connect, you request a transfer number for the name. The partnership then registers the name using that number and its new ABN, and pays the registration fee. Use the number before it expires.

How is a partnership taxed?

The partnership lodges an annual partnership return but doesn’t pay income tax itself. Each partner includes their share of the net income or loss in their own return and pays tax at their marginal rate.

Does the partnership need its own GST registration?

It does, once its GST turnover reaches $75,000 or is expected to. Your sole trader GST registration doesn’t transfer. Register the partnership within 21 days of hitting the threshold, or straight away if you’re already above it.

Will I pay capital gains tax when I bring in a partner?

Possibly. Giving a partner an interest in your goodwill or other capital assets is a disposal for CGT purposes. The small business restructure roll-over won’t apply because ownership changes, but the small business CGT concessions might. Get your accountant to run the numbers before you sign.

Can two sole traders work together?

They can, under a written agreement, while keeping separate ABNs and invoicing their own clients. Be careful not to pool profits or present yourselves as partners, or the law may treat you as a partnership anyway.

Is a partnership or a company better for two owners?

It depends on risk. A partnership is cheaper and simpler, but both partners carry unlimited personal liability. A company costs more to run, but it limits liability and handles investors and vesting shares far better.

Ready to make the switch?

If this feels like a lot, you’re not behind. Most owners only think about structure when a partner turns up, and you’re already doing it in the right order by reading first. Get the agreement right and the registrations are the easy part.

Want it done properly the first time? Talk to a Lawpath lawyer about moving from sole trader to partnership, and get your agreement, contracts and registrations sorted in one place.