Lump Sum Contract Template for New Zealand

A lump sum contract is a fixed-price construction agreement that provides certainty for both principals and contractors in New Zealand building projects. Under this arrangement, you pay a predetermined amount for the complete scope of works, regardless of the actual costs incurred by the contractor. This contract type is particularly valuable when you need predictable project costs and want to transfer price risk to the contractor.

When do you need this document?

You need a lump sum contract when undertaking construction projects with well-defined scope and specifications. This includes residential building projects, commercial fit-outs, infrastructure works, and renovation projects where the work can be clearly measured and specified. The contract is ideal when you require budget certainty and want to avoid cost overruns that can occur with other contract types like cost-plus arrangements. It's particularly suitable for projects where the design is complete and unlikely to change significantly during construction.

Key legal considerations

Your lump sum contract must clearly define the contract sum, scope of works, and payment schedule to avoid disputes. Include comprehensive variation clauses that specify how changes to the scope will be valued and approved. Time-related provisions are crucial, covering completion dates, liquidated damages, and extension of time procedures. Risk allocation clauses should address weather delays, unforeseen ground conditions, and design changes. Payment security provisions, including retention money and performance bonds, protect your interests. The contract should also address defects liability periods, typically 12 months for building work, and maintenance obligations post-completion.

Legal requirements in New Zealand

Your contract must comply with the Construction Contracts Act 2002, which mandates payment claim procedures, dispute resolution processes, and prohibits pay-when-paid clauses. Under this Act, you cannot withhold payment beyond 20 working days without following prescribed notice procedures. The Building Act 2004 requires compliance with building consent processes and building code requirements. Health and Safety at Work Act 2015 obligations must be clearly allocated, typically making the contractor responsible for on-site safety management. Your contract should reference relevant New Zealand Standards and specify that all work must achieve practical completion and code compliance certification. GST obligations under the Goods and Services Tax Act 1985 must be clearly stated, and the contract should comply with Fair Trading Act 1986 requirements for fair dealing and accurate representations.