Six Steps to Getting a Variation Order Approved and Paid
Variation orders protect construction contractors from unpaid extra work - but only when the process is followed. This six-step checklist covers notice periods, pricing, written approval, and how to make sure approved variations reach your payment application.
# Six Steps to Getting a Variation Order Approved and Paid
Every construction contractor has faced this situation: extra work gets instructed on site, the job moves forward, and by the time the final account arrives, the client disputes the cost or denies the instruction happened at all. Variation orders exist to protect contractors from exactly this problem - but only when the process is followed correctly. This checklist sets out the six steps that turn a scope change into a paid invoice rather than a write-off.
Why Verbal Instructions Leave You Exposed
UK construction contracts - whether JCT, NEC, or a bespoke agreement - require variations to be formally instructed and agreed in writing. Verbal instructions are the most common source of end-of-project disputes. A client or site manager says "while you're there, can you also..." and work proceeds without documentation. When the invoice follows, the client disputes the scope, contests the price, or simply cannot recall the conversation.
Even when a client genuinely intends to pay, a verbal instruction gives you nothing to point to if their project manager changes, the QS challenges the cost, or the company delays payment. Written records are your only protection.
Never proceed on a verbal instruction alone
Issue your own written record of the instruction within 24 hours - a brief email to the site manager or contract administrator confirming what was agreed is better than nothing. Your contract will specify who is authorized to instruct variations; make sure the right person has approved it.
The Six-Step Process
Getting a variation order approved and paid follows a consistent sequence, regardless of project size.
1. Identify the scope change and flag it immediately. As soon as work falls outside the original contract scope, note it and raise it. Do not absorb it into your costs or assume it will be settled at the end. Early flagging reduces disputes, because both parties still have clear memory of what was agreed.
2. Issue formal notice within the contract timeframe. Most construction contracts require notice within a specific window after a variation is instructed or becomes apparent - typically 7 to 14 days. Missing this deadline can forfeit your right to claim. Check your contract and issue notice in writing to the named contract administrator, architect, or client representative.
3. Price the variation properly. Your submission should include labour at current market rates (UK trade labour runs at £40 to £60 per hour in 2026 for electrical and similar skilled trades), materials at current cost rather than historic contract rates where prices have moved, extended site overhead if the variation adds time to the programme (site overheads on a UK construction project commonly run at £500 to £1,000 per day), and a contingency of 5-10% on the variation value. A transparent, itemized cost breakdown gives the client less to contest and moves approval faster.
Check your contract's valuation rules first
Many contracts require variations to be valued at rates from the original contract documents before moving to fair market rates. Know the hierarchy before you submit pricing - it affects how much you can claim.
4. Get written approval before starting. Where the situation allows, wait for written sign-off before the variation work begins. If urgency forces an immediate start, issue a written record that work is proceeding under protest pending formal approval. Keep a copy on the job file.
5. Update your job record. Log the variation against the job: instruction date, notice date, pricing submission date, approval date, and approved value. A clean audit trail is what settles disputes quickly when the final account is challenged.
6. Include the variation in your next payment application. Do not hold variations over until the final account. Submit approved variations as separate line items in your next interim payment application, referencing the variation number and instruction date. Getting variations into the payment cycle early improves cash flow and reduces the risk of a contested final account.
Maintain a variation register for every job
A single log tracking each variation by number, description, submitted value, approved value, and status takes minutes to maintain and saves hours at the final account stage. Even a shared spreadsheet is better than relying on email threads.
Turning Process Into Habit
The contractors who rarely lose money on variations are not necessarily the ones who write better claims - they are the ones who treat the process as a standing discipline on every job, not a reactive effort when disputes arise. Issue notices promptly, price transparently, and get sign-off in writing. Zigaflow's job management and eForm tools let site teams capture variation instructions and updates directly against the job record, so nothing falls through the gap between site and office.
- Variation Orders in Construction - How to Price and Claim Them ProperlyRapidQS UK · accessed 2026-06-14
- How do Variation Orders affect me?Subcontractor Hub · accessed 2026-06-14
- What are variation orders in construction?Procore UK · accessed 2026-06-14
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