How Old Do You Have To Be To Start A Business In Australia?

Young Australians are more entrepreneurial than ever. You might be helping your teenager sell products online, co-founding a venture with a 17-year-old, or fielding questions from a youth startup program. The big question comes up fast: how old do you have to be to start a business in Australia?

From a small business owner’s perspective, this question matters for two reasons. First, if a founder, shareholder or director is under 18, there are special legal rules to manage. Second, if your business hires or collaborates with under‑18s (as employees, ambassadors or contractors), you also need to handle age-related compliance correctly.

In this guide, we’ll break down the legal age rules in plain English, explain practical structures that work when a founder is under 18, and highlight the key contracts and compliance steps to keep your business protected.

Who Can Legally Start A Business In Australia?

In Australia, anyone-regardless of age-can have a business idea and participate in a venture. The legal question is about the capacity to enter contracts and hold certain roles.

Here’s the quick overview:

• Company directors must be at least 18. The Corporations Act requires directors to be adults. A minor cannot be appointed as a director of an Australian company.
• Minors can own property (including shares) in some circumstances. It’s common to hold shares on trust for a minor until they turn 18, or to use a custodian arrangement.
• Minors can enter contracts, but many contracts are “voidable” at the minor’s option. Unless a contract is for “necessaries” (e.g. essentials) or court-approved, a minor may later avoid the agreement. That’s a significant risk to manage if a founder is under 18.

Practically, this means young founders can be involved in a business, but you’ll usually put an adult in key legal roles and use supporting documents (for consent and guarantees) to reduce risk.

Can Someone Under 18 Run A Business?

Yes-under 18s can run a business activity, especially small online ventures. But you’ll need to plan around three areas: contracts, registrations and day‑to‑day operations.

Contracts With Minors

Contracts signed by minors may not be enforceable against them. If your business is buying inventory, leasing equipment, licensing software or selling to customers, you want certainty that agreements hold up.

Common ways businesses reduce risk include:

• An adult director or partner signs key contracts.
• A parent/guardian signs a Deed of Guarantee and Indemnity to back a minor’s obligations.
• Use of clear, age‑appropriate customer terms and refund policies to meet Australian Consumer Law standards.

ABN, Tax And Business Names

A minor can, in some cases, obtain an ABN if they are genuinely carrying on an enterprise, but government agencies may require extra information or guardian involvement. If you plan to trade under a name that isn’t the individual’s personal name, you’ll also need to register a business name (the “trading name”).

Because each situation is fact‑specific, it’s wise to map out who will be the legal “entity” doing business (the individual, a parent on trust, a partnership, or a company) before you start applying for accounts, merchant services or licences.

Banking And Platforms

Banks, payment gateways and e‑commerce platforms often have their own age requirements in their terms of service. Even if the law allows an under‑18 to trade, a provider might still insist on an adult account holder or guarantor. Build this into your launch plan so you’re not delayed at checkout.

What Structures Work If A Founder Is Under 18?

The right structure balances growth, liability protection and practical compliance. If a founder is under 18, these are the most common options businesses consider:

1) Sole Trader (Minor In Their Own Name)

This is the simplest setup, but also the riskiest for enforceability. A minor can (in some cases) be a sole trader and apply for an ABN, yet contracts they sign may be voidable. Suppliers, landlords and platforms may refuse to deal with a sole‑trader minor or demand a parental guarantee. Insurance access can also be harder.

2) Parent Or Guardian As Sole Trader (On Trust For The Minor)

Here, an adult is the legal business owner and enters contracts, while profits may be accounted for in a way that recognises the minor’s involvement. This resolves enforceability and banking issues, but the adult carries legal responsibility for debts and compliance.

3) Partnership With An Adult

A partnership can be formed between a minor and an adult, though the adult partner will generally shoulder the binding contractual obligations. If you go down this path, a written Partnership Agreement is essential to set profit shares, roles and exit rules.

4) Company With Adult Directors

This is the most robust option for many ventures. A company offers limited liability and clearer governance. All directors must be 18+, but the minor can still be involved operationally and may hold shares (often through a trustee or custodian arrangement). If you’re considering this pathway, organise your company set up, adopt a suitable Company Constitution, and document founder rights in a Shareholders Agreement.

Which option is “best” depends on the venture’s scale, risk profile and the minor’s role. Many teams start lean (using a parent as the contracting party) and move to a company structure as soon as the concept proves traction.

What Legal Documents Should You Have In Place?

When a founder is under 18-or when you’re working with under‑18s in any capacity-strong documents do the heavy lifting. Consider the following:

• Shareholders Agreement: If you operate through a company with multiple founders, a Shareholders Agreement sets decision‑making rules, vesting, exits and dispute mechanisms. It’s vital if a minor holds shares via a trustee or custodian.
• Deed of Guarantee and Indemnity: Where a minor is a party to dealings (e.g. supplier contracts), a parent/guardian guarantee can reassure counterparties and reduce unenforceability risk.
• Parental Consent Form: If your business features or collects content from under‑18s (e.g. photos, testimonials, ambassadors), a Parental Consent Form captures permission and outlines how content will be used.
• Customer Terms and Policies: Clear terms reduce disputes and help with Australian Consumer Law compliance. If you sell online, make sure your Privacy Policy and website terms are accurate and easy to find at checkout.
• Partnership Agreement: If an adult and a minor are in partnership, a written Partnership Agreement clarifies profit sharing, responsibilities and how the partnership ends.
• Non-Disclosure Agreement (NDA): When a young founder is pitching or collaborating, an NDA protects confidential information while you explore opportunities.
• Founding Company Documents: If you operate via a company, invest in a fit‑for‑purpose Company Constitution and founder documents (like option or vesting deeds) so incentives are aligned and long‑term ownership is clear.

You won’t always need everything on this list on day one, but getting the core documents right early will help you move faster and avoid roadblocks with banks, platforms and partners.

Key Legal Issues To Watch If A Founder Is Under 18

1) Contract Capacity And Enforceability

The biggest pitfall is assuming contracts signed by a minor will be enforceable. Where possible, have an adult (director, trustee, or guarantor) as the contracting party or co‑signatory. This may be a requirement from suppliers, landlords or payment providers anyway.

2) Governance And Decision-Making

If a minor is a co‑founder but cannot be a director, ensure their rights and obligations are properly reflected through shareholdings (often via a trust or custodian) and your Shareholders Agreement. This document should spell out who can sign contracts, how budgets are approved, and how disputes are resolved.

3) Data And Privacy Compliance

Any startup collecting personal information (emails, names, payment details) needs a compliant Privacy Policy and internal practices that respect the Privacy Act. If your audience includes minors, take extra care with consent, data minimisation and parental permissions where appropriate.

4) Branding And IP Ownership

Protect your brand early, especially if a young founder is gaining traction on social channels. Decide who owns trade marks, content and designs, and ensure ownership is held by the right entity. Record any assignments in writing so there’s no confusion later.

5) Practical Platform Limits

Some marketplaces and payment providers will insist on an adult account holder, regardless of what the law allows. Plan for an adult to hold the primary account and ensure your internal agreements mirror the commercial reality (e.g. revenue sharing, rights to transfer, decision making).

Hiring Young Workers? Age Rules For Employers

Many small businesses also employ under‑18s-common in retail, hospitality, fitness and creative industries. If that’s you, your obligations go beyond the founder age question.

• Minimum Employment Age: Each state and territory has rules about the youngest age a person can work and the types of work allowed. There are also restrictions on hours and when work can occur (especially during school terms).
• Fair Work Compliance: Young staff are still entitled to minimum wages, penalty rates and breaks under awards and the Fair Work Act. Put clear, compliant contracts in place, such as a Casual Employment Contract or an Employment Contract for part‑time roles.
• Parental Permissions: For certain activities (travel, media appearances, or overnight events), you may need written parental consent. A tailored Parental Consent Form can streamline this.
• Workplace Safety: Provide appropriate training and supervision. Young workers are new to the workforce and need extra support to work safely.

Getting youth employment settings right protects your team and your business while building a positive, compliant workplace.

Step-By-Step: Setting Up A Venture When A Founder Is Under 18

Step 1: Choose Your Structure

Decide whether an adult will operate as a sole trader (on trust for the minor), whether you’ll form a partnership, or whether a company with adult directors is the best fit. For growth ventures, a company is often preferred for liability protection and credibility with suppliers and investors.

Step 2: Assign Roles And Ownership

If you use a company, appoint adult directors and put in place a Shareholders Agreement reflecting founder roles, vesting and decision rights. If the minor will hold equity, consider a trustee/custodian arrangement until they turn 18.

Step 3: Register Your Trading Identity

Apply for an ABN for the operating entity and register your business name if you’re trading under a name that isn’t the entity’s legal name. Make sure your records match bank and platform requirements to avoid onboarding issues.

Step 4: Put Core Contracts And Policies In Place

Lock in customer terms, your Privacy Policy, supplier agreements, NDAs for collaborators, and guarantees where a minor is involved. These documents help you transact with confidence from day one.

Step 5: Prepare For Payments, Platforms And Insurance

Confirm who will be the adult account holder for payments and marketplaces, and check insurance requirements for your industry. If a provider requires a guarantee or adult control, reflect that in your internal documents and founder agreements.

Step 6: Stay Compliant As You Grow

As the founder turns 18, update roles (for example, appoint them as a director) and refresh your documents if needed. Keep an eye on ongoing obligations such as tax, payroll, consumer law and privacy-good systems now save headaches later.

Key Takeaways

• You must be 18 to be a company director in Australia, but minors can still be involved in a business-typically via adult directors, trustees or partnerships.
• Contracts signed by a minor can be voidable, so use adult signatories and/or a Deed of Guarantee and Indemnity where appropriate to manage risk.
• For many growth ventures, a company with adult directors and a clear Shareholders Agreement offers the best mix of credibility and protection.
• Protect your venture with practical documents from day one-customer terms, a Privacy Policy, NDAs, and (if relevant) a Parental Consent Form.
• If you employ under‑18s, follow state age rules, meet Fair Work obligations and use proper employment contracts and permissions.
• Plan for platform, banking and onboarding realities-providers may require an adult account holder even if the law allows youth involvement.

If you’d like a consultation on setting up a business that involves an under‑18 founder or hiring young workers, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no‑obligations chat.