Under Norwegian NS contracts, a party may terminate the contract with immediate effect for a material or fundamental breach — known as “vesentlig mislighold” in Norwegian — but only after giving the other party written notice and a reasonable opportunity to cure. Not every delay or defect qualifies: the breach must be serious enough to undermine the basis of the contract.
Foreign companies entering the Norwegian construction market quickly encounter the "NS standards" - a family of standard-form contracts published by Standard Norge that dominate Norwegian building and civil engineering projects. Under these contracts, a party may terminate immediately for vesentlig mislighold, or material breach, if the other side fails to meet its core contractual obligations. The standards treat termination as a last-resort remedy, though: strict notice-and-cure requirements apply, and terminating without following them can shift the risk — and the financial exposure — onto the terminating party. This article walks through what counts as material breach, the procedural steps required before terminating, the remedies available to both sides, and practical takeaways for companies working under NS contracts for the first time.
There are several varieties of the NS contracts, but they all essentially use the same legal test to determine if there is cause for termination due to a material breach. Under the standard, a party may generally terminate the contract) if:
The other party materially/fundamentally breaches its contractual obligations; or
it is clear that a material breach will occur (anticipatory breach); or
the other party becomes bankrupt or is demonstrably insolvent.
None of the standards define "material" with a fixed checklist - it is a general, fact-specific threshold assessed against Norwegian contract law principles, similar to fundamental breach doctrines elsewhere. In practice, Norwegian case law and commentary treat delay, defective work, non-payment, and failure to provide security as potential grounds, but only where the breach is serious enough to undermine the basis of the contract - not every deviation or minor delay qualifies.
Importantly, the right to terminate is not automatic even where a material breach exists:
Cure rights are built in. The Client cannot terminate for a contractor's breach if the contractor promptly demonstrates, without undue delay, that the work will still be completed in accordance with the contract. Likewise, a contractor cannot terminate for the Client's breach if the Client promptly provides adequate security for the outstanding obligations.
A notice and cure period is mandatory. Before terminating, the terminating party must give the other party written notice of a reasonable period to remedy the breach, warning that termination will follow if the breach is not cured. Where a contractor wishes to terminate for material payment default or failure to provide security, a 7-day period is generally treated as reasonable.
The party terminating the contract bears the burden of proof and the risk of establishing that there has been a material breach of contract sufficient to justify termination. If the requirements for termination are not met, the termination will be wrongful. This may entitle the other party to claim liquidated damages and compensation for losses suffered and, in the worst-case scenario, may itself constitute grounds for termination by the other party.
Termination must be in writing. It takes effect by written declaration to the other party or its representative.
This structure is consistent across the various NS contracts, reflecting the intent to keep termination as a last-resort remedy after cure opportunities have been exhausted.
Also read: Delays in construction projects—when and how
Once validly terminated, the standards regulate the practical wind-down in detail:
Risk transfer: Risk in the works passes over the moment the termination notice is received by the other party (or, failing that, upon completion of a joint inspection/recording process).
Site vacation: If the Client terminates, the contractor must promptly stop work and leave the site within a deadline set by the Client. If the contractor terminates, it may stop work and leave at any time after the Client has received the termination notice - but must first take reasonable steps to secure completed work, materials, and equipment against damage.
Client's step-in rights: Where the Client terminates, it gains the right to use the contractor's scaffolding, machinery, tools, and other equipment and materials left on site, and to obtain drawings and other documents needed to complete the works.
Recording meeting: Within 14 days of termination, the parties must hold a joint recording of the work completed, documented in minutes - important evidence for the ensuing financial settlement.
The standards distinguish compensation depending on which party terminates:
| If the Client terminates (contractor's breach) | If the contractor terminates (Client's breach) | |
| Contractor may claim | Payment for work already performed; reasonable compensation for the Client's use of its equipment | Necessary additional costs; lost profit on the portion of work that falls away; demobilization and wind-down costs; losses from its own commitments to subcontractors and suppliers |
| Client may claim | Necessary additional costs (including increased financing costs); liquidated damages for delay only up to the termination date | — |
| Foreseeable/consequential losses | Only if termination is due to the contractor's intent or gross negligence | Under NS 8405 and NS 8415, only if the Client's breach involved intent or gross negligence; NS 8407 instead ties this to ordinary damages principles |
Security reduction
On termination, the contractor may require that security held for the defects liability period be reduced proportionately to the work actually completed.
Termination is not the only lever available. All the main-contract standards (NS 8405, NS 8406, NS 8407) give the contractor a standalone right to suspend performance where the Client is in material default of its payment obligations, or it is clear such a default will occur. The contractor must give 24 hours' written notice before stopping work. If it does so, it is entitled to an extension of time and adjustment of the contract price for the resulting delay/cost impact, subject to the standards' normal notice requirements for such claims.
This gives the contractor a proportionate, lower-threshold remedy: it can apply pressure and protect its cash-flow position without going straight to the more drastic and often commercially damaging step of terminating the contract.
Where non-conformities are identified at or after taking-over but do not rise to the level of material breach, the standards provide a graduated remedy structure rather than termination: the contractor has both the right and the duty to rectify defects at its own cost (unless disproportionate), the Client may claim a price reduction where rectification is not required or only partially available, and the Client may recover the reasonable cost of having defects fixed by others if the contractor fails to rectify within a reasonable deadline. These remedies operate independently of, and are far more commonly used than, termination.
Also read: Key elements to include in a construction contracts
Termination after the NS-standards is not a synonym for informal contract abandonment. It is a formal, procedurally regulated remedy. A party that simply walks off site or stops paying without following the notice-and-cure sequence risks being found in breach itself, with the financial exposure reversed.
The bar for "material" breach is high and fact-specific. There is no fixed percentage or day-count that automatically qualifies. Foreign parties should not assume that delay alone, or a single defect, will support termination - Norwegian courts and arbitral tribunals assess materiality in light of the contract's purpose and the practical consequences of the breach.
Always build in the cure period - do not skip it. Even where the facts clearly show material breach, terminating without first giving written notice and a reasonable opportunity to cure will likely render the termination invalid. For payment defaults or missing security, 7 days is the standard reference point, but general breaches may require a longer, genuinely "reasonable" period assessed on the facts.
Choose the right standard - and read the right clause number. The same substantive rules on termination appear in different clause numbers depending on which standard applies. Foreign companies should confirm which standard governs their contract (main contract vs. subcontract; standard vs. simplified vs. design-build) before relying on clause references from a different standard.
Work stoppage is a distinct, lower-risk tool - use it deliberately. Before jumping to termination over a payment dispute, contractors should consider the standalone right to suspend work for material payment default, which carries its own 24-hour notice requirement and preserves time/cost relief without ending the contract.
Damages after termination are asymmetric and capped by fault. The scope of recoverable loss depends heavily on which party terminated and whether the counterparty's conduct involved intent or gross negligence. Ordinary negligence-based breaches will not open the door to consequential/foreseeable losses in the same way - this is a materially different framework from many common-law jurisdictions and should inform risk allocation and insurance planning from the outset.
Documentation discipline matters. The mandatory post-termination recording meeting within 14 days, and the associated minutes, are central to establishing the financial settlement. Foreign companies unfamiliar with this Norwegian practice should ensure local counsel or a Norwegian-speaking project manager is closely involved in managing this process.
Navigating termination under an NS contract carries real financial exposure if the notice-and-cure sequence isn't followed correctly. Whether you're preparing to issue a termination notice or have received one, our construction law team can help you assess the position before you act. Get in touch with Aider Legal to discuss your NS contract.