Change Order in Ireland: Template and Key Clauses (2026)

A change order in Ireland is a document that records an agreed change to the scope, price or time of an existing contract, most often a construction or services contract. It is a controlled amendment to a live contract, not a new one. What makes the Irish version specific is the interaction with standard construction forms, the statutory payment and adjudication regime under the Construction Contracts Act 2013, and VAT. This guide explains how change orders work, the key clauses and a drafting skeleton. It is general information, not legal advice; confirm a live deal with a qualified local lawyer. ## Variations under the contract and standard forms Irish construction commonly uses standard forms such as the RIAI contracts (Royal Institute of the Architects of Ireland) for private work, or the Public Works Contracts for state projects. These contain variation clauses that set out who may instruct a change, how it is valued and how time is adjusted. A change order should follow the contract's own variation mechanism rather than operate outside it. On services contracts the same discipline applies: a signed, agreed amendment is safer than a verbal instruction. ## The Construction Contracts Act 2013 For construction contracts, the Construction Contracts Act 2013 sets statutory rules on payment, including payment claim notices and timelines, and gives a right to refer a payment dispute to adjudication. Because a change order changes the amount due, it feeds directly into these payment mechanisms, and a disputed variation can be taken to statutory adjudication. Draft change orders so the valuation and the payment position are clear, to reduce the risk of a payment dispute. ## VAT Irish VAT applies to construction and services, with reverse-charge rules relevant to many construction supplies between accountable persons, and a standard rate currently 23 percent administered by Revenue. A change order that increases the price increases the VAT base. State whether the change-order amount is inclusive or exclusive of VAT and address the reverse charge where it applies. Getting the VAT treatment right on the change order avoids a later correction to the payment claim and the invoice, which is exactly the kind of loose end that turns into a payment dispute. ## Key clauses in an Irish change order - Reference to the base contract: name the contract, date and parties, and confirm other terms continue.

• Instruction and authority: the variation instruction relied on and the authority to give it.
• Description of the change: a precise statement of the added, removed or altered scope.
• Valuation: the price adjustment and how it was valued.
• Time: any extension of time and effect on milestones.
• Payment and VAT: how the change feeds the payment claim, and the VAT treatment including any reverse charge.
• Reservation of rights: that agreeing this change does not waive other claims.
• Governing law: Irish law and the courts of Ireland. ## A simple drafting skeleton 1. Title, change-order number and date

2. Reference to the base contract and parties
3. Instruction and authority relied on
4. Description of the change
5. Valuation and price adjustment
6. VAT and reverse-charge treatment
7. Extension of time and milestones
8. Effect on the payment claim
9. Statement that other terms continue
10. Reservation of rights
11. Authorised signatures Give the most attention to valuation and the payment position, because a disputed variation can be taken to adjudication under the 2013 Act. ## Common mistakes to avoid - Doing the extra work on a verbal instruction, then disputing it later.

• Ignoring the payment-claim and adjudication framework of the Construction Contracts Act 2013.
• Missing VAT reverse-charge rules on construction supplies between accountable persons.
• Failing to state that the base contract otherwise continues.
• Leaving the valuation method vague. ## Keeping the payment trail clean Because the Construction Contracts Act 2013 runs on payment claims and short response windows, a change order should be drafted so it slots into that rhythm. Agree the variation and its value, then make sure the next payment claim reflects it with the backup attached. Where the value is still open, say so and reserve it, rather than leaving it silent and risking a dispute later. If a payment dispute does arise, either side can refer it to adjudication, and an adjudicator will look for clear records: the instruction, the agreed or claimed value, and any extension of time. The cleaner the change-order paper trail, the stronger the position in that forum. ## Services and IT contracts As in other countries, change orders in Ireland are not limited to building work. Outsourcing, software and professional-services contracts use a change-control procedure built on the same idea: a written, signed amendment that sets out revised scope, price and timelines and confirms the master agreement otherwise continues. Follow the contract's own change-control clause where it has one, number the change orders, and keep them with the base contract so the live scope is always clear. ## Keeping a contract portfolio under control One Irish change order is manageable by hand. A portfolio is not. The hard part is tracking which version is current, when each notice period runs, which clause carries risk, and which renewal is due. That work (drafting from a tuned template, flagging risky clauses, tracking dates, keeping versions straight) is what an AI contract workspace can hold in one place. Adira is built for this, with per-clause risk review, plain-English clause editing and a live activity timeline. It is India-first today, with other jurisdictions architected but not yet at the same depth, so verify local depth before relying on it for Irish law. More at Adira. The law above stands on its own. ## Bottom line An Irish change order is a controlled, signed amendment that records new scope, price, time and VAT, fitted to the contract's variation clause and to the payment and adjudication regime under the Construction Contracts Act 2013. Value the change clearly, handle VAT and the reverse charge, and get Irish construction advice for anything contentious.