Free retention calculator · Black Creek Solutions

Runs on your device. Information, not legal advice.Nothing you type is sent anywhere or stored, and there are no cookies. The Construction Contracts Act sets no retention rate: the rates and cap come from your contract.

Free to use, all of it. The online team version is coming, in a monthly plan.Free: Retention held to date and on this claim, and the next report date. Early access, in a plan: retention by claim and party, the release dates you enter, and what's still owed. Subcontractor plan: $49 a month, per business; Project plan: $99 a month per project, by contract value, plus GST if applicable. Early access: order now and we'll set up your project when the online team version opens. Order by email to hello@blackcreek.co.nz. There's no charge until your project is set up. Plans are billed monthly in advance: the invoice is dated the 1st and due on the 20th of the same month. Your monthly price is held for 12 months from your start date. Any rise after that comes with 30 days' notice. Cancel at the end of any month. Nothing here is locked. Build your project

Track it claim by claim with the free retention tracker (Excel).

What the Act asks of whoever holds retention money

These rules apply to retention under a commercial construction contract (where no party is a residential occupier), for contracts entered into, or renewed, from 31 March 2017. Read the retention money guide for more.

Construction Contracts Act 2002, subpart 2A (ss 18A to 18Q), s5 "commercial construction contract", s11A(3); legislation.govt.nz, version as at 5 October 2023, checked 1 Nov 2026.

Retention not paid when it's due?

Get the claim and the dates right first: Unpaid claim pack $295 (plus GST if applicable), invoiced after delivery, due on the 20th of the following month.

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Retention calculator

Your contract's retention

The claims

What the Act asks of whoever holds retention money

Retention not paid when it's due?