What is an NDA? A guide for small business owners

Published Thursday 23 July 2026

Table of contents

• What is an NDA?
• Why use an NDA?
• When does your business need an NDA?
• Types of NDAs
• Key elements of an NDA
• What information does an NDA protect?
• What it means when you sign an NDA
• How to enforce an NDA
• Limitations of NDAs
• Manage your business legal requirements with confidence using Xero
• FAQs on NDAs

Key takeaways

• A non-disclosure agreement (NDA) is a legally binding contract that prevents one or more parties from sharing confidential business information, and a significant majority of US firms use them.
• Small businesses should consider using NDAs when hiring employees, working with contractors, sharing financials with investors, and entering partnerships or acquisition discussions.
• NDAs come in 3 main types: unilateral (one-way), bilateral (mutual), and multilateral, each suited to different business relationships.
• While NDAs are a valuable tool for protecting sensitive information, they have limitations and can be difficult to enforce, so it's worth consulting a lawyer to make sure yours is solid.

What is an NDA?

A non-disclosure agreement (NDA) is one of the most common legal tools small businesses use to protect sensitive information. Understanding what an NDA covers and how it works can help you safeguard your business with confidence.

An NDA, also called a confidentiality agreement, is a legally binding contract between 2 or more parties. It establishes that certain information shared between them must be kept private and cannot be disclosed to outside parties without permission.

NDAs create a confidential relationship between the people who sign them. The party sharing sensitive information (the disclosing party) gains legal protection, while the party receiving the information (the receiving party) agrees to keep it secret. If the receiving party breaks the agreement, the disclosing party can take legal action.

Why use an NDA?

NDAs give small business owners a straightforward way to protect the information that makes their business valuable. Without one in place, you have limited legal recourse if someone shares your confidential data.

According to research published in the Washington and Lee University Law Review, approximately 88% of US firms use NDAs, covering around 57% of American workers, making them one of the most common legal tools for protecting business information.

Here are the key benefits of using an NDA for your business:

• Protects trade secrets, client lists, pricing strategies, and other proprietary information from being shared with competitors.
• Sets clear expectations with employees, contractors, and partners about what information is confidential from day 1.
• Gives you legal grounds to pursue damages or an injunction if someone breaches the agreement.
• Builds trust during sensitive business discussions, like fundraising or acquisition talks, because both sides know the boundaries.
• Helps protect your intellectual property, including product designs, marketing strategies, and technology.

When does your business need an NDA?

There are several situations where putting an NDA in place is a smart move. If you're sharing information that could harm your business if it became public, an NDA is worth considering.

Hiring employees

New employees often gain access to sensitive business information, from customer databases to internal processes. Having them sign an NDA as part of onboarding makes it clear which information is confidential and what the consequences are for sharing it.

Onboarding contractors and vendors

When you hire an independent contractor or bring on a new vendor, they may need access to your systems, financials, or client information. An NDA protects you if the relationship ends or if the contractor works with your competitors.

Sharing information with investors

Raising capital means opening your books and sharing your business plan, revenue figures, and growth strategy. Before you hand over detailed financial data, an NDA makes sure potential investors can't share your plans or pass them along to competing businesses.

Working with clients

Some client relationships involve sharing proprietary methods, pricing models, or strategic plans. A mutual NDA can protect both sides, keeping your trade secrets safe while assuring clients their information is equally secure.

Entering business partnerships

Joint ventures and partnerships often require both parties to share confidential operational details. An NDA, alongside other key documents like an LLC operating agreement, sets boundaries around what can and can't be disclosed outside the partnership.

Mergers and acquisitions

If you're buying a business or selling yours, the due diligence process involves sharing detailed financial records, contracts, and operational data. An NDA is standard practice before any of that information changes hands.

Types of NDAs

Not all NDAs work the same way. The type you need depends on the relationship and whether 1 or both parties are sharing confidential information.

Unilateral NDA (one-way)

A unilateral NDA is the most common type. Only 1 party shares confidential information, and the other party agrees not to disclose it. This is typical when you're sharing business details with a new employee, contractor, or potential investor.

Bilateral NDA (mutual)

A bilateral NDA, also called a mutual NDA, protects both parties. Each side shares confidential information and agrees to keep the other's information private. This is common in partnerships, joint ventures, and merger discussions where both businesses are sharing sensitive data.

Multilateral NDA

A multilateral NDA involves 3 or more parties, where at least 1 party will share information that the others must keep confidential. This simplifies things when multiple businesses are collaborating, because you only need 1 agreement instead of separate NDAs between each pair.

Key elements of an NDA

A well-drafted NDA should cover several essential components. Knowing what to include helps you make sure your agreement actually protects your business.

Parties to the agreement

The NDA should clearly identify who is involved. This includes the full legal names of all parties, whether they're individuals, companies, or both.

Definition of confidential information

This is the heart of the agreement. It spells out exactly what counts as confidential, whether that's financial records, customer lists, product formulas, or business strategies. The more specific this section is, the easier the NDA is to enforce.

Exclusions from confidentiality

Most NDAs list types of information that aren't covered. Common exclusions include information that's already publicly available, information the receiving party already knew, and information obtained independently from a third party.

Permitted uses

This section defines what the receiving party can actually do with the confidential information. It might limit use to a specific project, business evaluation, or working relationship.

Duration and time period

Every NDA should state how long the confidentiality obligation lasts. Some NDAs expire after a set period (commonly 2 to 5 years), while others remain in effect indefinitely for certain types of information like trade secrets.

Remedies and dispute resolution

This section outlines what happens if someone breaches the agreement. It may include provisions for monetary damages, injunctive relief (a court order to stop the disclosure), and the method for resolving disputes, such as mediation or arbitration.

What information does an NDA protect?

NDAs can cover a wide range of business information. The specific types of data protected depend on what's defined in the agreement, but here are the most common categories.

• Customer information: client lists, contact details, purchasing history, and contract terms.
• Financial data: revenue figures, profit margins, pricing strategies, and financial projections. Once an NDA is in place, tools like Xero can help you share accurate financial reports with confidence.
• Intellectual property: product designs, patents, proprietary software, formulas, and creative works.
• Marketing strategies: campaign plans, target market research, advertising budgets, and upcoming product launches.
• Operational information: internal processes, supplier relationships, manufacturing methods, and business plans.

What it means when you sign an NDA

Signing an NDA is a serious commitment. Before you put your name on one, it's important to understand exactly what you're agreeing to.

When you sign an NDA, you're legally obligated to keep the specified information confidential. This means you can't share it with friends, family, other businesses, or on social media, unless the agreement specifically allows it.

Breaking an NDA can have real consequences. The disclosing party can sue for breach of contract and seek monetary damages to cover any losses caused by the disclosure. In some cases, they can also get a court order (injunction) to prevent further sharing of the information.

Before signing, read the agreement carefully. Pay attention to what's defined as confidential, how long the obligations last, and what the penalties are for a breach. If anything is unclear or seems overly broad, consider having a lawyer review it before you sign.

How to enforce an NDA

Having an NDA in place is only useful if you're prepared to enforce it. If you suspect someone has breached your agreement, here are the steps to take.

Identify the breach

Gather evidence that confidential information was disclosed without authorization. This might include emails, documents, screenshots, or testimony from other parties. The stronger your evidence, the better your position.

Send a cease and desist letter

A formal cease and desist letter from a lawyer puts the breaching party on notice. It demands they stop sharing the information immediately and can often resolve the situation without going to court.

Seek injunctive relief

If the breach is ongoing and causing immediate harm, you can ask a court for an injunction. This is a court order that forces the breaching party to stop disclosing the information right away, even before the full case is decided.

Pursue damages

If the breach caused financial harm to your business, you can sue for monetary damages. This could include lost revenue, lost business opportunities, or other measurable losses tied to the unauthorized disclosure.

Limitations of NDAs

NDAs are a valuable tool, but they're not a perfect shield. Understanding their limitations helps you set realistic expectations and use them more effectively.

• Can't protect public information: if the information is already publicly available or becomes public through no fault of the receiving party, the NDA won't cover it.
• Enforcement challenges: proving a breach can be difficult and expensive. You'll need clear evidence that the specific person disclosed the specific information covered by the agreement.
• Time limits: most NDAs have expiration dates. Once the agreement expires, the receiving party is no longer bound by it, unless the NDA includes indefinite protection for certain categories like trade secrets.
• Can't prevent reporting illegal activity: an NDA can't stop someone from reporting illegal behavior to law enforcement or regulatory agencies. Whistleblower protections override confidentiality agreements.
• Jurisdiction issues: if the parties are in different states or countries, enforcing an NDA can be more complex. Laws vary by jurisdiction, and you may need to pursue legal action in a specific court.

For added protection, consider pairing your NDAs with other safeguards, like small business insurance, to cover potential losses from data breaches or disputes.

Manage your business legal requirements with confidence using Xero

NDAs are just 1 piece of running a protected, well-organized business. Once you've secured your confidential information, keeping your financial records accurate and accessible makes every partnership, investment, and contractor relationship smoother.

Xero's cloud accounting software helps you stay on top of invoicing, expense tracking, and financial reporting, so you're always ready when it's time to share data under an NDA. Get one month free.

FAQs on NDAs

Here are some frequently asked questions about NDAs to help you understand the basics.

What happens if you break an NDA?

The disclosing party can sue you for breach of contract and seek monetary damages to cover their losses. In serious cases, a court may also issue an injunction to stop further disclosure.

Are NDAs legally binding?

Yes, NDAs are legally binding contracts when properly drafted and signed by all parties. Like any contract, they must include consideration (something of value exchanged) and be reasonable in scope to hold up in court.

How long does an NDA last?

Most NDAs last between 2 and 5 years, though the duration depends on the type of information being protected. Some NDAs include indefinite protection for trade secrets.

How much does an NDA cost?

Simple template NDAs can cost little to nothing, while a lawyer-drafted custom NDA typically ranges from $200 to $1,500 or more depending on complexity. For critical agreements, investing in legal review is worth it.

Can you refuse to sign an NDA?

Yes, you can refuse to sign an NDA, but the other party may then choose not to share confidential information with you or not to move forward with the business relationship. It's worth negotiating specific terms rather than refusing outright.

Is a confidentiality agreement the same as an NDA?

Yes, a confidentiality agreement and an NDA are the same thing. Both terms refer to a legal contract that prevents parties from sharing specified confidential information.