Retention Payments in New Zealand: Holding and Releasing Retentions Explained

If you run a trade, contracting, or construction-related business, you've probably come across retention payments (often just called "retentions"). They're common in the industry, but they can also be a major source of cashflow pressure, admin headaches, and disputes if they're not handled properly.

On top of that, New Zealand has specific legal rules around how retention money must be held. If you're the party holding retentions (for example, a head contractor), you need to get this right from day one. If you're the party owed retentions (for example, a subcontractor), you'll want to know what protections you have and what you can ask for.

Below, we'll break down how a retention payment typically works, what New Zealand law expects of businesses holding retentions, and the practical steps you can take to reduce risk and keep projects moving.

What Is A Retention Payment (And Why Do Construction Contracts Use It)?

A retention payment is money withheld from a contractor or subcontractor as a form of security. In practice, it's usually:

• a percentage deducted from each progress payment (often 5?10%);
• held until key milestones are met (for example, practical completion); and
• released at the end of a defects liability period (also called a defects notification period).

The basic idea is simple: retentions are meant to encourage the contractor to finish the job properly and return to fix defects, because there's money still "on the table".

From a small business perspective, though, retentions can create real pressure. If you're waiting on a big retention release across multiple jobs, it can tie up a significant chunk of your working capital. If you're holding retentions, you're taking on real compliance obligations and handling money that may not be yours to use as you please.

So, the first step is getting clarity on your contract terms:

• How much is being retained?
• When is the retention payment released? (And is it split into stages?)
• What conditions apply? (e.g. "all defects rectified", "all documents provided", "all claims resolved")
• What notice process applies? (e.g. you must request release in writing)

If those terms are vague, you can end up with disputes right when the project is meant to be wrapping up.

What Does NZ Law Say About Retentions?

In New Zealand, retentions in construction contracting are heavily influenced by the Construction Contracts Act 2002 (often called the CCA), including amendments that strengthened the retention money regime.

While the details can get technical, here's the key point for most small businesses:

If you're withholding retentions under a "construction contract", the CCA can require you to treat that retention money as being held on trust for the party it's owed to, and to keep proper accounting records so the retentions are identifiable.

In other words, retentions generally aren't meant to be treated like "free cash" by the party holding them. The law is designed to reduce the risk that, if the party holding the retentions becomes insolvent, the money disappears and contractors/subcontractors are left unpaid.

Why This Matters For Small Businesses

Retentions often become contentious at the worst time: when deadlines are tight, defects are being argued about, and cashflow is stretched. If you're holding retentions and you don't follow the rules, you can face:

• disputes and relationship breakdowns on current and future projects;
• claims that you've failed to properly hold retention money (including arguments that funds should have been preserved and accounted for);
• costly legal action (including urgent steps to recover funds); and
• reputational damage that can impact your ability to win tenders.

If you're unsure whether your contract is a "construction contract" or whether the retention regime applies to your arrangement, it's worth getting advice early. A quick review can be cheaper than dealing with a retention dispute months later.

How Should Businesses Hold Retention Money (Practically, Not Just "Legally")?

Even when you understand the concept, the day-to-day admin around retention compliance is where many businesses slip up.

As a practical baseline, if you are holding retentions, you should have systems that cover:

1) Clear Accounting And Record-Keeping

You'll want to be able to quickly answer questions like:

• How much retention have we withheld from each contractor/subcontractor?
• Which invoices did it come from?
• What project does it relate to?
• When is it due to be released (and in what stages)?

This isn't just "nice to have". If a relationship goes sour, your records are often what determines whether you can resolve it efficiently or whether it escalates into a formal dispute.

2) A Contract That Matches How You Actually Operate

A lot of retention issues come from using templates that don't reflect the reality of the job (or the payment processes the business is actually following).

If you regularly engage subcontractors, it's worth having a properly drafted Subcontractor Agreement that clearly sets out:

• the retention percentage and retention cap (if any);
• release triggers (practical completion, code compliance documentation, defects period expiry, etc.);
• how defects are notified and what timeframe applies to fix them;
• whether you can use retentions to cover genuine costs of rectifying defects (and how you calculate that); and
• any conditions precedent to release (for example, warranties, manuals, certificates, as-built documentation).

It's also important your contract aligns with the rest of your project documents, including scopes, variations processes, and payment claim procedures.

3) A Consistent Payment Claim And Approval Process

Retentions often go wrong because payment claims are processed inconsistently. For example, the business retains 10% for the first few claims, then "forgets" and pays 100% for later claims, then tries to "fix" it at the end.

That's when disputes start, because the other party may say the retention was waived or is being applied incorrectly.

If you need help tightening up the paperwork across your contracts generally, a Contract Review is often the simplest way to identify gaps and fix them before they turn into expensive problems.

When Do You Release A Retention Payment (And When Can You Withhold It)?

The million-dollar question (sometimes literally): when does a retention payment actually have to be released?

In most projects, retention release is staged, commonly like this:

• First release: a portion released at practical completion (for example, 50% of the retentions held);
• Final release: remaining balance released at the end of the defects liability period (assuming defects are rectified and conditions are met).

However, it always comes back to your specific contract terms. Retention clauses can differ significantly across industries and even across different clients in the same industry.

Common Reasons Retention Release Gets Delayed (And How To Reduce The Risk)

Delays usually happen because of one of these issues:

• Defects disputes: whether something is a defect, whether it was caused by another trade, and what the repair should cost.
• Documentation gaps: missing producer statements, manuals, certificates, as-builts, or warranties.
• Variations and claims not finalised: parties argue about final account reconciliation.
• No clear request process: one party assumes retentions will be paid automatically, while the other expects a formal written request.

To keep things smoother, your contract should include a clear "end-of-job" process. For example:

• how defects are listed and signed off (often via a defects list);
• timeframes for rectification;
• the process for assessing cost if the principal/head contractor says it needs to be fixed by someone else; and
• a specific date or mechanism for retention payment release once conditions are satisfied.

If you're drafting or updating documents for this, getting help with Contract Drafting is usually worth it, because small wording changes can make a big difference when a project is under pressure.

What If There's A Dispute About Retentions (Or The Party Holding Them Goes Insolvent)?

Retention disputes often feel personal, but they're usually caused by misaligned expectations and unclear documentation.

If there's a genuine disagreement about defects or final account items, you'll want to approach it in a structured way:

1) Check The Contract First

Before you fire off emails or threaten legal action, confirm:

• the retention release dates and conditions;
• the defects notification process;
• whether the party holding retentions can set-off amounts and under what conditions; and
• any dispute resolution clause (for example, negotiation then mediation, then adjudication).

2) Keep Your Evidence In One Place

In retention disputes, the party with organised records is usually in the strongest position. Useful evidence can include:

• payment claims and payment schedules;
• site instructions and variation approvals;
• photos and inspection reports;
• defects lists and sign-off documents; and
• emails confirming completion or acceptance.

3) Consider Your Recovery Options Early

If you're owed a retention payment and the other side is stalling, you may want to consider formal recovery pathways. Depending on the situation, that could involve:

• a formal letter of demand;
• using a contractual dispute resolution process;
• construction adjudication processes (where applicable); and/or
• debt recovery action if the retention is due and payable.

If your business is regularly chasing overdue payments (including retentions), it can help to have consistent recovery documents and processes in place, such as a Debt Collection Agreement (especially where you're outsourcing recovery).

4) Insolvency Risk: Don't Ignore This

One of the biggest real-world risks around retention payments is insolvency. If the party holding the retention money becomes insolvent, contractors and subcontractors can be left exposed.

This is exactly why New Zealand tightened retention obligations (including trust-style protections and record-keeping requirements). From a practical standpoint, if you're owed retentions, you should consider:

• asking early (and in writing) how retentions are being held and accounted for;
• keeping a clear ledger of retention amounts owed to you on each job; and
• getting advice on whether you should protect your position in other ways.

For some businesses, it may also be worth exploring whether other security is appropriate on a particular project (for example, guarantees, bonds, or other contractual security). A PPSR registration can be relevant in some supply/credit arrangements, but it won't automatically "secure" a retention entitlement in every case, so it's important to get advice on the right strategy for your contract structure. Where appropriate, Register A Security Interest advice may be relevant.

How Do You Set Up Retention Clauses That Protect Your Business From Day One?

The best time to sort out retention issues is before you start work (or before you start withholding money). Once a project is near completion, leverage shifts and emotions can run high.

Here are practical ways to strengthen your retention approach:

Use Clear, Specific Retention Clauses

A good retention clause usually covers:

• How retentions are calculated (percentage, cap, and how the retained amount is applied to progress claims)
• When retentions are withheld (each progress payment, milestone claims, etc.)
• When retentions are released (dates and/or events, staged release)
• What can delay release (defects not rectified, missing documents)
• How disputes are handled (notice requirements, dispute resolution steps)

If you're working in construction, the retention clause also needs to "play nicely" with your broader payment claim process and any CCA requirements that apply to the project.

Align Retentions With Your Variation And Defects Processes

Retentions often become a battleground because they're used to negotiate unrelated issues, like variations, delays, or incomplete paperwork.

You can reduce that risk by making sure your agreements clearly address:

• how variations are quoted, approved, and invoiced;
• how delays are handled and what notices are required;
• how defects are identified, notified, rectified, and signed off.

If your business provides a mix of goods and services (or you're doing installation work), a tailored agreement like a supply/install contract can help clarify responsibilities. Depending on your project type, you might also need documents like a Supply And Install Agreement.

Don't Treat Retentions As Working Capital

This is a big one. If you're holding retentions, it can be tempting to treat that money as part of your normal cashflow. But in many cases, retentions are required to be preserved and traceable for the benefit of the party who earned them.

From a risk perspective, mixing retention funds with everyday operating money increases the chance of:

• accidental non-compliance with retention obligations;
• inability to pay retentions when they fall due; and
• major issues if the business hits financial stress.

Even if your intentions are good, the practical consequences can still be serious. Building a system that ring-fences retentions (and makes them clearly identifiable in your accounts) can save you a lot of pain later.

Get The Right Advice Early

If you're regularly negotiating retention terms with principals, head contractors, or clients, it's worth having a lawyer help you set a consistent contracting position. This is especially important if you're growing quickly, taking on larger jobs, or engaging multiple subcontractors.

Many businesses find it useful to get a set of "core" documents in place (and keep them updated), rather than renegotiating retention terms from scratch on every job.

If you're operating in the construction space and want industry-specific support, a Construction Lawyer can help you set up contracts and processes that match how your projects actually run.

Key Takeaways

• A retention payment is money withheld as security, usually released in stages (for example, at practical completion and after the defects liability period).
• In New Zealand, retention money on construction contracts can be subject to specific requirements under the Construction Contracts Act 2002, including obligations that can treat retentions as held on trust and require proper records so the money is identifiable.
• If you're holding retentions, you should have strong systems for record-keeping, consistent payment processing, and clear retention clauses that match your operations.
• If you're owed retentions, keep your own retention ledger and make sure the release triggers, dates, and documentation requirements are clear from the start.
• Most retention disputes come down to unclear contract wording, poor documentation, defects disagreements, or "final account" issues that weren't properly managed during the job.
• Getting your contracts reviewed or drafted properly is one of the simplest ways to reduce retention disputes and protect your cashflow.

If you'd like help reviewing your retention clauses, setting up your contractor/subcontractor agreements, or dealing with a retention dispute, you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.