What is an NDA? Non-disclosure agreements explained

Published Monday 22 June 2026

Table of contents

• What is a non-disclosure agreement (NDA)?
• When do businesses use NDAs?
• Types of NDAs
• What does an NDA include?
• How long does an NDA last in Australia?
• Are NDAs enforceable in Australia?
• Advantages and disadvantages of NDAs
• Keep your business information secure with Xero
• FAQs on NDAs

Key takeaways

• A non-disclosure agreement is a legally binding contract that protects confidential business information from being shared without permission. Australian small businesses commonly use them during partnerships, hiring, investor discussions, and mergers.
• NDAs come in 2 main types: one-way agreements where 1 party shares information, and mutual agreements where both parties exchange confidential details. Choosing the right type depends on who's sharing what.
• An effective NDA clearly defines what counts as confidential information, how long the agreement lasts, and what happens if someone breaches it. In Australia, NDAs typically last between 1 and 5 years, though trade secret protections can run indefinitely.
• NDAs are enforceable in Australia as long as they're reasonable in scope and duration. If you're entering any business arrangement that involves sharing sensitive information, an NDA can give you practical, low-cost protection.

What is a non-disclosure agreement (NDA)?

A non-disclosure agreement (NDA) is a legally binding contract that prevents 1 or more parties from sharing confidential information with anyone outside the agreement. It's 1 of the most common tools Australian businesses use to protect sensitive information during negotiations, partnerships, and day-to-day operations.

You might also hear NDAs called confidentiality agreements, confidential disclosure agreements, or secrecy agreements. They all serve the same purpose: setting clear boundaries around what information stays private and what happens if those boundaries are crossed.

For small business owners, NDAs don't need to be complicated. At their core, they're a practical way to share ideas, financial details, or business plans with others while keeping your competitive edge safe.

When do businesses use NDAs?

Any time you're sharing information that could hurt your business if it got into the wrong hands, an NDA is worth considering. Here are some of the most common scenarios where Australian small businesses use them.

• hiring employees or contractors who'll have access to customer data, pricing strategies, or proprietary processes
• pitching to investors or applying for funding where you need to share financial records and growth plans
• entering partnerships or joint ventures that require both parties to exchange business insights
• exploring a merger or acquisition where detailed financial and operational information gets shared during due diligence
• protecting intellectual property like product designs, software code, recipes, or manufacturing methods
• engaging suppliers or vendors who need access to your systems, customer lists, or internal processes

If you're unsure whether a situation calls for an NDA, ask yourself: would this information give a competitor an advantage if they had it? If the answer is yes, an NDA is likely a good idea.

Types of NDAs

Not every confidentiality situation looks the same, so NDAs come in different forms to match. The 2 most common types are one-way and mutual agreements.

One-way (unilateral) NDAs

A one-way NDA is used when only 1 party is sharing confidential information. The disclosing party shares the information, and the receiving party agrees not to share it further.

This is the type you'd typically use when hiring a new employee, bringing on a contractor, or pitching your business idea to a potential investor. You're the one sharing; they're the one agreeing to keep it confidential.

Mutual (bilateral) NDAs

A mutual NDA protects both parties equally. Each side agrees to keep the other's confidential information private.

This type is common in partnerships, joint ventures, and merger discussions where both businesses need to share sensitive details. If you're exploring a collaboration with another company and both of you are putting proprietary information on the table, a mutual NDA makes sure everyone's protected.

What does an NDA include?

A well-drafted NDA covers several key elements that define the scope of the agreement and what happens if it's breached. While the specifics can vary, most NDAs include the following components.

• parties involved: the full legal names and details of everyone entering the agreement
• definition of confidential information: a clear description of exactly what information is protected, whether that's financial records, customer lists, trade secrets, or business strategies
• exclusions from confidentiality: information that isn't covered, such as anything already publicly available or independently developed by the receiving party
• obligations of the receiving party: what the recipient can and can't do with the information, including who they're allowed to share it with (if anyone)
• duration: how long the confidentiality obligations last, from the signing date through to expiry or termination
• consequences of breach: the remedies available if someone breaks the agreement, which might include financial damages, injunctions, or both

The more specific your NDA is about what counts as confidential information, the easier it'll be to enforce if something goes wrong. Vague or overly broad definitions can weaken the agreement.

How long does an NDA last in Australia?

There's no single answer to how long an NDA should last because it depends on the type of information you're protecting and the nature of the business relationship. In Australia, most NDAs fall into 1 of 3 categories.

Fixed-term NDAs

Most business NDAs run for a set period, typically between 1 and 5 years. This is common for employment agreements, contractor relationships, and partnership discussions where the information has a limited commercial lifespan. A 2-year NDA might suit a short-term project, while a 5-year term could make sense for a longer business relationship.

Indefinite NDAs

Some information, like trade secrets or proprietary formulas, doesn't lose its value over time. In these cases, confidentiality obligations can run indefinitely, meaning the receiving party must keep the information private forever. Australian courts generally accept indefinite terms for genuine trade secrets.

Hybrid approaches

Many NDAs combine both approaches. The general confidentiality obligations might expire after a set period, while protections for trade secrets continue indefinitely. This gives you flexibility to match the agreement to the sensitivity of the information.

Keep in mind that Australian courts consider reasonableness when assessing NDA terms. An NDA that's unreasonably long or broad may be harder to enforce, so it's worth getting the duration right from the start.

Are NDAs enforceable in Australia?

Yes, NDAs are enforceable in Australia, provided they meet the basic requirements of a valid contract. Like any contract, an NDA needs an offer, acceptance, consideration (something of value exchanged), and an intention to create legal relations.

If someone breaches your NDA, you can pursue several remedies through the Australian courts. These typically include damages (financial compensation for losses caused by the breach) and injunctions (court orders preventing the party from continuing to share your information).

However, several factors can affect enforceability. Courts may refuse to enforce an NDA if the scope of confidential information is too vague, the duration is unreasonably long, the restrictions go beyond what's necessary to protect legitimate business interests, or the agreement was signed under duress. To give your NDA the best chance of holding up, keep the terms clear, reasonable, and specific to the information you actually need to protect.

Advantages and disadvantages of NDAs

Like any business tool, NDAs have both benefits and drawbacks. Understanding both sides helps you decide when they're the right choice for your situation.

Advantages

NDAs offer several practical benefits for small businesses.

• Protect sensitive information like customer lists, pricing strategies, and trade secrets from being shared with competitors.
• Set clear expectations about what's confidential and what's not, reducing the risk of misunderstandings.
• Provide a legal pathway to seek damages or injunctions if a breach occurs.
• Cost relatively little to create compared to the potential losses from leaked information.
• Demonstrate professionalism to investors, partners, and clients by showing you take confidentiality seriously.

Disadvantages

There are also some limitations worth considering before putting an NDA in place.

• Can create an atmosphere of mistrust if introduced at the wrong time or without explanation.
• May discourage potential partners, employees, or freelancers who see them as overly restrictive.
• Require effort to enforce if a breach occurs, including potential legal costs.
• Offer limited protection if confidential information is shared with someone outside the agreement.
• Don't prevent breaches from happening; they only provide recourse after the fact.

Keep your business information secure with Xero

Protecting your confidential business information starts with knowing what you have and where it's stored. NDAs give you a legal framework for keeping sensitive details private, but staying organised with your financial records and business data matters just as much.

Xero's cloud accounting software helps you keep your financial information secure and well-organised. With automated bank reconciliation, real-time reporting, and secure cloud storage, you can stay on top of your numbers with less manual admin. Whether you're preparing for a partnership, an investor pitch, or a merger, having clean and accessible records makes the process smoother. Get one month free.

FAQs on NDAs

Here are some frequently asked questions about NDAs that Australian small business owners often have.

Can a verbal NDA be enforced in Australia?

Verbal confidentiality agreements are difficult to enforce because there's usually no evidence of what was agreed. To protect your business, always use a written NDA signed by all parties involved.

What is the difference between an NDA and a confidentiality agreement?

There's no practical difference. "NDA" and "confidentiality agreement" are 2 names for the same type of legal document. Some industries prefer 1 term over the other, but they serve the same purpose and carry the same legal weight.

Do I need a lawyer to create an NDA?

You don't legally need a lawyer, and there are many templates available online. However, if you're dealing with complex information, high-value relationships, or specific industry regulations, getting a lawyer to draft or review your NDA can help make sure it's enforceable.

Can I share NDA-protected information with my accountant?

It depends on what your NDA says. Many NDAs include carve-outs that allow sharing with professional advisers like accountants and lawyers, provided those advisers are also bound by confidentiality. Always check the specific terms of your agreement before sharing.