Are Oral Agreements Enforceable? Risks Of Handshake Deals

A handshake deal can feel like the simplest (and most “business-like”) way to get something done. You’ve found a supplier you like, you’ve agreed on a price, you trust each other, and you both want to move quickly. So you shake hands and get on with it.

The problem is that when things don’t go to plan, a handshake deal can quickly turn into a “he said, she said” dispute. You might be left chasing unpaid invoices, dealing with a supplier who changes the price, or losing a key customer because expectations were never properly written down.

In Australia, oral agreements can be enforceable in many situations - but that doesn’t mean they’re easy to enforce, or that they give you the protections your business actually needs.

Below, we’ll walk you through when a handshake deal is legally binding, the biggest risks for small businesses, and practical steps you can take to protect yourself (without making every negotiation feel heavy or awkward).

What Is A Handshake Deal (And Why Do Small Businesses Still Use Them)?

A “handshake deal” is essentially an agreement made verbally (or informally) where the parties rely on trust rather than a detailed written contract. In practice, it might be:

• a quick verbal agreement for supply or services;
• a price and scope agreed over the phone;
• a “we’ll send the paperwork later” arrangement that never becomes formal;
• a relationship-based deal where you’ve worked together for years.

Small businesses use handshake deals because they can feel efficient and respectful. They also help keep momentum, particularly when:

• you’re doing repeat work;
• your industry moves fast (and you don’t want a deal to stall);
• you’re dealing with local networks where reputation matters;
• the other party resists “legal paperwork”.

But the same informality that makes a handshake deal easy at the start can make it risky later - especially if the value of the deal grows, the relationship changes, or something unexpected happens (delays, quality issues, cash flow problems, staff turnover, or a change in management).

Are Handshake Deals Legally Binding In Australia?

Yes - a handshake deal (oral agreement) can be legally binding in Australia.

Australian contract law doesn’t require most contracts to be in writing. What matters is whether you actually formed a valid contract.

That said, there are important exceptions where the law requires certain agreements to be in writing (or evidenced in writing) to be enforceable. This can include some dealings involving interests in land, some credit-related arrangements, certain guarantees, and other situations depending on the circumstances and legislation in your State or Territory. If you’re unsure, it’s worth getting legal advice before you rely on a verbal “yes”.

What Makes An Oral Agreement Enforceable?

Generally, a contract exists if you can show:

• Offer: one party made a clear offer (e.g. “We’ll supply 500 units at $X per unit”).
• Acceptance: the other party accepted that offer (e.g. “Agreed”).
• Consideration: something of value is exchanged (usually money for goods/services).
• Intention to create legal relations: in business contexts, this is often assumed.
• Certainty: the key terms are sufficiently clear (price, scope, timing, what’s being delivered).

If these elements exist, an oral agreement can be enforceable - but proving those terms can be the hardest part.

When A “Handshake Deal” Might Not Be Enforceable

Even if everyone remembers shaking hands, you may have difficulties if:

• the “agreement” was too vague (e.g. no clear scope, no price, no timeframe);
• it was still “subject to” something (like “subject to contract” or “subject to finance”);
• there was no real agreement (one side thought it was a quote, the other side thought it was a fixed deal);
• there are legal requirements for writing (some arrangements must be in writing to be enforceable).

Also, if a dispute reaches court, evidence becomes everything - which is exactly where handshake deals can fall apart.

Why Handshake Deals Go Wrong: The Biggest Risks For Small Businesses

When we see disputes coming out of handshake deals, it’s rarely because one party planned to do the wrong thing. It’s usually because there was room for misunderstanding, or the business environment changed.

Here are the most common risks to watch out for.

1. You Can’t Prove What Was Agreed

If the other party denies key terms (or remembers them differently), you’re left relying on fragments of evidence: texts, emails, invoices, delivery dockets, witness accounts, and whatever notes someone took at the time.

That’s not impossible - but it’s slower, more expensive, and less predictable than having a signed agreement setting out the deal.

2. Scope Creep And “That Wasn’t Included” Arguments

Handshake deals often miss the practical details that keep projects on track, like:

• what’s included and excluded;
• how variations are approved;
• what happens if the customer changes their mind;
• handover and acceptance criteria.

Without those guardrails, you can end up delivering far more than you priced for, or battling over what “reasonable” means.

3. Payment Terms Get Messy

Many handshake disputes boil down to payment:

• When is payment due?
• Is it a deposit plus milestones, or payment on completion?
• Can you charge late fees?
• What happens if work is paused?

If you’re relying on informal arrangements, it can be harder to recover money quickly - especially if the other party claims they were “never told” about your payment expectations.

4. Liability, Warranties And Risk Allocation Are Unclear

A handshake deal rarely addresses who bears the risk if something goes wrong. For example:

• If goods are damaged in transit, who pays?
• If your service causes the customer loss, are you liable and to what extent?
• If a deadline is missed due to factors outside your control, what happens?

This is also where businesses get caught out on consumer-facing work, because even if your deal is informal, Australian Consumer Law (ACL) obligations can still apply in many scenarios.

If your business supplies goods or services to consumers, it helps to clearly manage customer expectations and handle consumer guarantees appropriately. Depending on what you sell, this might include having clear terms (and a compliant returns/refunds approach) and, where relevant, a Warranties Against Defects Policy - but this type of policy is generally only appropriate in specific situations and must meet ACL requirements.

5. Confidentiality And IP Protection Gets Overlooked

If you’re sharing pricing, supplier details, unique processes, or product ideas as part of a handshake deal, you might assume the other party won’t reuse it.

But unless confidentiality is properly documented, it can be difficult to stop someone from using your information - especially if they argue it was never “confidential” or that nothing was agreed.

6. You May Accidentally Create Commitments You Didn’t Mean To

Small business owners often try to be helpful and flexible. But statements like “Yes, we can do that” or “We’ll lock that in” can later be argued as a binding promise - particularly when the other party relies on it and starts making decisions based on what you said.

This risk increases when agreements happen quickly via phone calls and then performance starts immediately.

If you’re regularly accepting work or confirming terms verbally, it’s worth getting clarity on whether your quotation is legally binding in your situation, and how to structure your quoting process to avoid misunderstandings.

How Courts Look At Oral Agreements (And What Evidence Matters)

When an oral agreement ends up in a dispute, the key issue is usually not “can an oral contract exist?” but “what were the actual terms?”

If you need to enforce a handshake deal, evidence typically comes from the surrounding circumstances - what lawyers often call the “course of dealing” and “objective evidence”.

Helpful Evidence To Back Up A Handshake Deal

Even if you don’t have a signed contract, your business may have evidence such as:

• Emails and texts: confirming price, scope, timing, or deliverables.
• Purchase orders and invoices: showing what was supplied and at what rate.
• Statements of work or proposals: even if unsigned, they can indicate what was offered.
• Delivery dockets and acceptance records: showing the customer received the goods/services.
• Payment records: deposits, partial payments, or payment patterns consistent with certain terms.
• Witnesses: if staff were present for the agreement or involved in the delivery.
• Previous dealings: a history of similar transactions can help show what “normally” happens between you.

What Makes Oral Disputes Harder (And More Expensive)

Oral agreement disputes often become costly because:

• both sides have genuine (but different) recollections;
• key people leave the business and can’t confirm what happened;
• you spend time pulling together evidence after the fact;
• there’s uncertainty about what a court will accept as “the deal”.

That uncertainty can push businesses into settlements they don’t love, simply to end the distraction and financial drain.

How To Protect Your Business Without Killing The Relationship

We get it: you don’t want to send a 30-page contract for every small job. But protecting your business doesn’t have to be complicated - you just need a consistent process that turns handshake deals into clear written terms.

Here are practical ways to do that.

1. Confirm The Deal In Writing (Even If It’s Just A Follow-Up Email)

After the phone call or meeting, send a short confirmation message that covers the key terms. For example:

• what you’re delivering (scope);
• price (including whether GST applies);
• timeframes;
• payment terms;
• any assumptions (e.g. customer provides access, approvals, materials).

This doesn’t replace a proper contract, but it can significantly strengthen your position if there’s ever a dispute. (If you’re unsure about GST treatment for a particular supply, consider getting accounting or tax advice.)

2. Use Proper Terms For Customers (Especially If You Sell Online)

If you provide goods or services to customers regularly, it’s usually worth having standard terms you can attach to quotes, invoices, or proposals.

Depending on your business model, that might be:

• a services agreement for project work;
• a set of terms and conditions for repeat work;
• an online checkout flow with terms acceptance.

For online sales and platforms, having Website Terms and Conditions can help set expectations around orders, delivery, returns, acceptable use, and liability settings.

3. Make Payment Terms Non-Negotiable (Or At Least Consistent)

One of the fastest ways handshake deals cause cash flow pain is unclear payment timing. Consider setting a simple internal rule, such as:

• “No work starts without a deposit,” or
• “Milestone payments for projects over $X,” or
• “Net 7 days for regular customers, upfront for new customers.”

It’s not about being strict for the sake of it - it’s about reducing risk and keeping your business stable.

4. Lock In Confidentiality Before Sharing Sensitive Information

If you’re discussing pricing models, your supplier list, product formulas, marketing strategies, or system designs, you should consider using a confidentiality agreement before you share details.

This is particularly useful when you’re negotiating a partnership, exploring a joint venture, or onboarding a contractor who will see behind-the-scenes parts of your business.

5. Get The Right Documents In Place For Co-Founders And Investors

Handshake deals aren’t just for sales - they also happen between founders.

If you’re starting a business with someone (or bringing in an investor), relying on “we trust each other” can become risky as soon as:

• one person contributes more time or money;
• you disagree on decisions;
• someone wants to exit;
• someone stops pulling their weight.

In those situations, a tailored Shareholders Agreement can help document ownership, decision-making, roles, and exit arrangements (so you’re not trying to negotiate those terms during a conflict).

Similarly, if your company needs rules around governance, share issues, and director powers, a Company Constitution can give you a clearer framework than relying solely on assumptions or informal discussions.

6. Protect Customer Data And Marketing Practices Early

If your handshake deal involves collecting customer information (names, emails, phone numbers, delivery addresses, or even behavioural data through a website), you should make sure you’re handling it properly.

Having a clear Privacy Policy helps you explain what information you collect, how you use it, and how customers can contact you about their data.

This becomes even more important if you’re running email campaigns, promotions, or newsletters, because marketing and privacy compliance often overlap in practice.

When A Handshake Deal Isn’t Enough (And You Should Use A Written Contract)

Not every transaction needs a heavily negotiated agreement, but there are certain situations where moving from a handshake deal to a proper written contract is a smart risk-management decision.

You should strongly consider a written contract when:

• The value is significant: higher dollar amounts justify more protection.
• The work is complex: more steps = more room for disputes.
• You’re relying on strict timeframes: deadlines, events, or supply chain commitments.
• You’re investing upfront: you’re ordering stock, booking contractors, or turning away other customers.
• You’re dealing with a new counterparty: trust is still being built.
• There’s reputational risk: if the project goes wrong, it could damage your brand.
• You need clear risk allocation: liability caps, indemnities, insurance requirements, and dispute resolution steps.

A good written contract doesn’t just protect you if something goes wrong - it can also prevent things from going wrong in the first place, because everyone understands what success looks like and what happens if issues arise.

Key Takeaways

• A handshake deal (oral agreement) can be legally enforceable in Australia, but enforceability often depends on whether you can prove the contract terms clearly - and some types of agreements may need to be in writing to be enforceable.
• The biggest risks of a handshake deal are uncertainty, scope creep, payment disputes, and a lack of clarity around liability, confidentiality, and what happens when things change.
• Even if you keep things informal, a follow-up email confirming the key terms can make disputes much easier to resolve.
• Standard customer terms, clear payment processes, and confidentiality protection can help you keep deals moving while still protecting your business.
• If you have co-founders or investors, relying on informal promises is risky - it’s usually worth documenting ownership and decision-making properly.
• When a deal is high-value, complex, time-sensitive, or involves upfront investment, a written contract is often the safest way to protect cash flow and reduce disputes.

If you’d like help turning handshake deals into clear, practical contracts that protect your business, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.