Getting a yes in writing before the tool comes out: variation approval for small trades

Because from where they stand, it is. They see a switch that needs shifting half a metre. They do not see the wall coming off, the cable run, the make-good, or the hour lost from the next job. The gap is not dishonesty on either side. It is that nobody said the price out loud before the tool came out. The surprise tends to land at invoice time, not at the moment of the request. An electrician of two decades opened a thread on r/electricians this way: "Clients always seem surprised when they want an extra receptacle or a switch moved, and it’s not “just a five-minute job.”" The word variation does a lot of damage here. To a client it sounds like a contract clause designed to extract money. To a tradie it is just the honest name for work that was not in the quote. Used without a number attached, it sounds like lawyering. Used with a photo and a number attached, it sounds like being straight. Say the number at the moment of the request, not later. The same figure that feels reasonable standing in the hallway feels like a rort when it appears on a final invoice three weeks after the job finished.

Four fields. A photo of the site condition before you touched it. One line of scope, such as move switch 600mm left, patch and paint make-good. The added cost and any added time, which is the part that gets skipped and the part that gets litigated. And an explicit approval, where the client replies approved, because a reply beats a signature you cannot find. The whole trail can live in SMS or email. It does not need an app rollout, a portal login for the client, or a new subscription. Everything it needs is already on the phone. The same r/electricians poster, who goes on in that thread to recommend quoting software, sets out his own rule first: "I don’t touch a change until it’s in writing, even if it’s just a simple email or a signed note. Saves your butt if there are disputes later." The rule that makes it stick is sequencing. The approval has to arrive before the work becomes irreversible. Once the tiles are up, the client has lost the ability to say no, and they know it. That is when the relationship curdles, because now they are paying for something they were never actually given the chance to decline. Australian building regulation reinforces the same sequencing. Victoria's Domestic Building Contracts Act 1995 requires variations to be given in writing before the work is carried out for contracts above the regulated threshold. Check your own state's requirements, because they differ. The dispute infrastructure gives some sense of scale. Domestic Building Dispute Resolution Victoria handled an average of 5,780 cases a year between 2017-18 and 2022-23. Of Victorian domestic building disputes reaching conciliation, 52% were fully resolved, 7% partially and 41% not resolved, with 12% progressing to VCAT. A dispute that runs all the way through takes a median of 207 days at DBDRV plus a further 236 days at VCAT, so well over a year. In Queensland, the QBCC received 5,771 defective building work complaints in 2024-25 and conducted 427 contract compliance investigations, naming variations among the common breach types (QBCC Annual Report 2024-25). What no regulator publishes is the number you would most want: how many disputes are caused specifically by variations or verbal agreements. VAGO, Consumer Affairs Victoria and the QBCC were all checked and none break disputes down that way. The consequence documented in legislation is the part that should motivate you regardless of the count, and this is general information rather than legal advice.

Because the person who said yes leaves, and the company that pays does not remember them. From a subcontractor chasing a completion payment on r/AusLegal: "We got the verbal confirmation from the Project Manager (whom also advised me the client is happy with the product and they are happy to go ahead with the wax, Site Foreman also gave the go ahead to seal." Two people on site said yes. The head contractor's accounts payable process has no record of either. The subcontractor did the work correctly and is now the one carrying the risk. The fix is not distrust. It is a habit. When a verbal go-ahead is given, send a confirming message within the hour: confirming your go-ahead on site today to seal and wax, added cost as discussed, reply to confirm. If they never reply, you have still created a contemporaneous record that you raised it and they did not object. Send it to a company address, not a personal mobile. When the project manager leaves, their number leaves with them. The company inbox stays.

Not if it is your only copy and nobody can prove it was not altered. On r/AusLegal, a customer who queried a bill almost double the estimate was told: "They replied telling me they no longer had the original signed consent form and quote as they scanned it in on the day of the initial appointment and destroyed the paper document, but they had the scanned version so sent me that." A flat scan or a photo of a signature is weak evidence when the amount is in dispute. It does not show on its face when it was made, what changed, or that the figure on the page was the figure the client saw, and an image file can be edited by anyone with a phone. In that thread it was the file's metadata that exposed the alteration, which is not something you can rely on. What carries weight is a record with a timestamp neither party controls unilaterally: an email sitting in both parties' inboxes, an SMS thread, or a job record in a system with an audit log. If your job management software records quote acceptance with a timestamp, use that function rather than a photo of a signature, because the timestamp is the point. If you must use paper, keep the paper. Scanning and destroying gives you the worst of both.

The honest answer is that the writing part is not a technology problem. A tradie with a disciplined SMS habit beats a badly built workflow every time. What technology fixes is the forgetting. Nobody skips the variation message because they do not believe in it. They skip it because they are on their knees under a sink at 4pm with two more jobs booked. So the useful build is small, and it is a prompt rather than a portal. When a job's booked hours are exceeded, or a photo is added to a job mid-visit, fire a message to the tech asking whether this is a variation. Yes sends the client a pre-filled approval request with the photo, the line of scope, the cost and a reply-to-approve. The reply drops back onto the job record and into the invoice as an approved line item. That is a handful of steps sitting on top of a job management system and a messaging provider. It is well within reach of an office manager who has been taught to map the process and debug it, which is why we teach it that way rather than hosting it for you. The counter-argument deserves airtime. Automating a nudge to a tech who ignores nudges just creates a new notification to ignore. If your crew already treats the variation conversation as optional, fix the habit first and add the prompt second. The system enforces a decision that has already been made. It does not make it for you.

Does an SMS count as written variation approval in Australia? An SMS is a written record with a timestamp, which is the kind of thing you want on hand if the amount is queried later. Some domestic building contracts and state acts require a signed written variation for larger residential works. Check the requirements for your state and contract type, and keep the thread either way. What if the client refuses to approve a variation mid-job? Stop before the work becomes irreversible and put the choice back to them in writing: proceed at the added cost, or leave the original scope as quoted. Document the decision. A refusal on record is a better outcome than doing the work and arguing later. How do I raise a variation without sounding difficult? Lead with the photo and the reason, not the contract. Found this behind the wall, here is what it needs and what it adds. Give a number at the same moment. Clients react badly to the word variation on its own and reasonably well to a photo with a price. Should I use a job management app or just email? Email and SMS are enough if you are consistent. A job management system can add timestamped quote acceptance and a change history, which matters when the amount is disputed. Check what your own software actually records before you rely on it. Consistency beats the tool choice. Is a photo of a signed quote good enough evidence? Weak on its own. An image does not show on its face when it was made or what changed, and it can be edited. Keep the original paper, or use a system that records when the client accepted and what they accepted. Do not scan and destroy the only original.

Quotes are reproduced verbatim from public Reddit threads and attributed to the subreddit only. The two r/electricians quotes come from the same post by the same author. r/electricians: https://www.reddit.com/r/electricians/comments/1nq1r3u/hey_folks/. r/AusLegal: https://www.reddit.com/r/AusLegal/comments/1olfurq/construction_company_refusing_to_pay_completion/. r/AusLegal: https://www.reddit.com/r/AusLegal/comments/1p8ho73/vet_clinic_has_altered_a_consent_form_quote_a/. Legislation referenced: Domestic Building Contracts Act 1995 (Vic), https://www.legislation.vic.gov.au/in-force/acts/domestic-building-contracts-act-1995.