Private Share Purchase Agreement: A Guide To Buying And Selling Shares In Your Business

At some point in your company’s journey, you might want to bring in a new investor, transfer equity to a co‑founder, or step back and sell down your stake. When that time comes, getting the legal paperwork right is just as important as agreeing on the price.

That’s where a private share purchase agreement comes in. It sets clear rules for the share sale, helps manage risk on both sides, and keeps your company records compliant in Australia.

In this guide, we’ll walk through how private share transfers work, what to include in your agreement, key legal requirements (including ASIC filings and timing), and practical tips to keep your deal on track. We’ll also touch on when a share sale might be better than an asset sale-and vice versa-so you can choose the structure that fits your goals.

Quick note on scope: Sprintlaw provides legal advice. We don’t provide tax advice, so where tax consequences are mentioned, treat them as prompts to speak with a qualified tax adviser.

How Do Private Share Transfers Work?

Private companies (Pty Ltd) don’t have freely tradable shares like listed companies. Transfers are controlled by your company’s rules and the agreement between buyer and seller. Most transactions follow a similar path.

1) Check Your Governing Documents

Before you negotiate terms, read your Company Constitution and any Shareholders Agreement. Many private companies include:

• Pre‑emptive rights requiring you to offer shares to existing shareholders before selling to outsiders
• Board or shareholder approval requirements for any transfer
• Restrictions on who can hold shares or minimum holding thresholds

Not following these processes can lead to breaches and disputes, and may prevent the transfer from being recognised on the company’s register.

2) Agree The Commercial Terms

Buyer and seller align on the “headline” terms: how many shares and which class, price, timing, any conditions, and what risk protection the parties will give each other (warranties, indemnities, restraints).

It’s also common to discuss whether the seller will stay involved post‑completion (e.g. in a consulting or employment capacity) and how decisions will be made going forward if the buyer becomes a material shareholder.

3) Paper The Deal

These terms are documented in a formal Share Sale Agreement (often called a private share purchase agreement or SPA). This is your core contract and should be tailored to your transaction-off‑the‑shelf templates can miss important protections.

4) Satisfy Any Conditions And Approvals

Depending on your constitution and shareholder arrangements, you may need written board approval, shareholder resolutions, or consents from third parties (for example, where a financing agreement includes a change‑of‑control clause). Build time into your timeline for these steps.

5) Complete The Transfer Properly

At completion, the buyer pays the purchase price and the company updates the share register to record the new ownership. You’ll also handle the mechanics of the transfer of shares-usually including a signed transfer form and meeting any execution requirements. If companies are signing the agreement, consider execution under section 127 of the Corporations Act and ensure documents are properly signed.

After completion, the company must notify ASIC of changes to its share structure. This is typically done by lodging the relevant change within 28 days (for example, via an ASIC Form 484 equivalent through ASIC’s portal). Late lodgements can attract late fees and penalties.

Finally, consider whether to issue or update share certificates. While many companies now rely on electronic registers and certificates aren’t always required by law, your constitution or shareholder expectations may still call for them.

What Should Your Agreement Include?

Every deal is different, but most private share purchase agreements cover similar ground. A clear, thorough contract reduces the chance of misunderstandings and protects the interests of both parties.

Parties And Shares

• Parties: Full legal names, ACNs/ABNs where relevant, and addresses for notices.
• Shares: The number and class of shares being sold, and any rights attached to them (voting, dividends, preferences).

Price And Payment

• Purchase price: Set out the total price and whether it’s a fixed amount, a valuation‑based figure, or includes adjustments (e.g. debt or working capital).
• Payment terms: Lump sum or instalments, any escrow arrangements, timing, and consequences for late payment.

If you haven’t agreed on a valuation method, it’s worth aligning on how you’re valuing shares so there are no surprises.

Conditions And Timing

• Conditions precedent: Approvals (board/shareholder), consents from third parties, finance conditions, or due diligence steps to be satisfied before completion.
• Completion: The completion date, place (or virtual arrangements), and the documents to be exchanged.

Warranties, Indemnities And Risk Allocation

• Seller warranties: Statements about title to the shares (unencumbered), capacity to sell, accuracy of information disclosed, and (if negotiated) statements about the company’s operations, contracts, compliance and financials.
• Buyer warranties: Often limited-capacity to buy and authority to enter the agreement.
• Indemnities: Targeted indemnities for known risks or breach of specific warranties.
• Limits on liability: Caps, claim thresholds, time limits for claims, and procedures for making a claim.

Restraints And Confidentiality

• Restraints: Non‑compete, non‑solicit and non‑poach obligations on the seller (where reasonable in scope, duration and geography).
• Confidentiality: Protection of company information and deal terms.

Execution And Process

• Execution: If a company is signing, consider including a section 127 execution block; see our guide to signing under section 127.
• Dispute resolution: A pathway for negotiation, mediation or arbitration helps resolve issues without immediate litigation.
• Governing law and notices: Confirm the Australian jurisdiction and where notices can be sent.

If multiple shareholders are involved or the ownership and control mix will change, you may also need to update or put in place a Shareholders Agreement to deal with decision‑making, exits and future funding.

Legal Requirements, Filings And Tax Considerations

Share transfers in Australian proprietary companies sit within a clear legal and compliance framework. Here are the key touchpoints to be aware of.

Company Law And Internal Rules

The Corporations Act 2001 (Cth) sets the baseline rules for share transfers, while your constitution and any shareholders agreement add binding internal rules-often including pre‑emptive rights, approval steps and form requirements. If these processes aren’t followed, you risk breaching your obligations and the company may refuse to register the transfer on its share register.

Board/Shareholder Approvals

Many constitutions require a board resolution to approve a transfer. Larger transactions (or those affecting control) may also trigger shareholder approvals. Keep minutes and resolutions on file-good record‑keeping reduces future friction.

ASIC Notification And Timing

After completion, the company must update ASIC’s records of its share structure and shareholders. In practice, this is lodged via ASIC within 28 days of the change (for example, by submitting the change covered by an ASIC Form 484 equivalent through ASIC’s online portal). Missing the deadline can mean late fees and potential compliance issues.

Stamp Duty And Landholder Duty

Most Australian jurisdictions have abolished ordinary stamp duty on transfers of shares in private companies. However, “landholder duty” regimes can apply where the company (or its corporate group) holds significant interests in land. If your company owns or indirectly controls real property, check your state or territory’s thresholds and rules.

Tax Considerations (Get Specialist Advice)

Share sales can have tax consequences for both buyer and seller-capital gains tax for the seller, and potential implications for franking credits, cost base and future distributions for the buyer. Because tax outcomes depend on your specific circumstances, speak with a tax adviser before you lock in deal terms. To reiterate, Sprintlaw provides legal advice-not tax advice.

Other Regulatory Consents

Some licensed or regulated businesses (for example, in financial services, healthcare or education) may require notifications or regulatory consent for changes in ownership or control. Build time into your transaction timeline if your industry is regulated.

Company Records And Post‑Completion Housekeeping

• Update the share register and (if used) issue updated share certificates.
• File ASIC changes within 28 days.
• Store signed agreements, resolutions and transfer forms in your company records.
• Review your Company Constitution and confirm it aligns with the new ownership and any planned changes to governance.
• If the incoming shareholder will be active in the business, consider whether you also need new employment or consulting agreements and updated policies.

Private Share Sale Vs Asset Sale: What’s The Difference?

There are two common ways to buy or sell a business: sell the shares in the company (a share sale) or sell the business assets out of the company (an asset sale). Each approach has different legal and tax consequences and affects “what” actually changes hands.

Share Sale (Private Share Purchase)

• What transfers: Ownership of the company’s shares. The company itself-together with all contracts, assets and liabilities-remains the same legal entity.
• Pros: Often simpler to transfer the entire business as a going concern, contracts may remain with the company with minimal novation, customers and suppliers see continuity.
• Cons: Buyer inherits historical liabilities and risks (hence the importance of warranties, indemnities and due diligence).

Asset Sale

• What transfers: Specific assets and contracts are sold by the company to the buyer (e.g. equipment, stock, IP, goodwill, selected contracts). The seller company stays with its owners unless its shares are sold separately.
• Pros: Buyer can choose the assets and liabilities they take on; can be cleaner for some industries.
• Cons: More consents/novations may be required, and employees may need to be transferred or re‑hired.

If you’re weighing the options, our guide on share sale vs asset sale explains these trade‑offs in more detail. The “best” path depends on your goals, the business, and tax advice.

Practical Tips To Keep Your Deal On Track

Based on what we see every day helping founders, buyers and sellers, these tips will help you avoid the common traps.

Start With Your Rules (And Don’t Skip Pre‑Emptive Rights)

Before you agree commercial terms with an outsider, check if existing shareholders have first rights to buy. Ignoring pre‑emptive rights is a fast path to disputes and delays. If the right exists and holders decline to exercise it, record that in writing.

Be Clear On Valuation And Price

Agree how the price was set and whether any adjustments apply (e.g. debt adjustments, completion accounts). If you’re not sure how to approach valuation, align on a method up front or seek advice on valuing shares so there’s a common baseline.

Tailor Warranties To The Deal

Warranties aren’t one‑size‑fits‑all. If the buyer is taking a minority stake and has limited control, they may seek broader warranties about the business. If the buyer is already an insider, you might keep warranties narrow and disclosure‑based. In any case, use sensible caps and time limits for claims.

Paper The Transfer Cleanly

Ensure the SPA is properly executed (companies can execute under section 127), the transfer form is signed, board/shareholder approvals are in place, and the company’s records are updated. If you’re unsure on mechanics, follow a clear transfer of shares process from term sheet through to completion and filings.

Keep ASIC Filings And Registers Up To Date

Don’t forget the 28‑day window for ASIC lodgements (e.g. the change captured by ASIC Form 484) and keep your share register accurate. Late filings mean avoidable fees and messy records.

Update Or Create Your Shareholders Agreement

If ownership or control changes, refresh your Shareholders Agreement so voting thresholds, decision‑making and exit rules reflect the new reality. This helps prevent future gridlock.

Watch Duty And Sector‑Specific Rules

If your company holds significant land or operates in a regulated sector, factor in landholder duty checks or regulatory consents early so they don’t derail your timing.

Use The Right Document For The Job

Your SPA is the core contract, but it often works alongside other documents (employment or consultancy agreements, IP assignments, releases, updated constitution or option deeds). Align the moving parts so there are no gaps.

Know When To Get Help

It’s normal to feel unsure about the details-that’s why we recommend having a lawyer draft or review your Share Sale Agreement and check approvals, filings and process. For tax, loop in your accountant early.

Key Takeaways

• A private share purchase agreement sets clear terms for buying and selling shares in an Australian private company and helps manage risk for both sides.
• Start with your company rules: your Company Constitution and any Shareholders Agreement usually set pre‑emptive rights and approval steps that must be followed.
• Paperwork matters: tailor the SPA, get board/shareholder approvals, complete the mechanics of the transfer of shares, and lodge changes with ASIC within 28 days (e.g. via an ASIC Form 484 equivalent).
• Certificates are optional for many companies; check your constitution and consider electronic registers when handling share certificates.
• Be aware of landholder duty and industry‑specific approvals, and seek specialist tax advice-tax outcomes depend on your circumstances and Sprintlaw does not provide tax advice.
• Consider whether a share sale or an asset sale is the better structure for your goals; each has different risk and compliance implications, explored in our share sale vs asset sale guide.
• Getting legal help early to draft or review your agreement and process can prevent costly delays and disputes later on.

If you would like a consultation on navigating a private share purchase agreement or buying and selling shares in your Australian business, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no‑obligations chat.