Most jobs that go over budget don’t go over with one big shock. They go over with one phone call. The plumber rings on day three, says they have found something that wasn’t visible at the quote, and quietly mentions a number that is noticeably higher than what you signed off on. The customer feels the room get warm. They don’t want to be the difficult one. They also don’t want to write a cheque for an extra two grand without being sure it is fair. Most people freeze for a second and then say something they end up regretting.
Here’s how to handle it when a tradie comes back wanting more money mid-job, what to ask, what to insist on in writing, and how to tell whether the new number is fair.
Why mid-job price changes happen, and which ones are reasonable
Not every price change is dodgy. Walls hide things. Floor cavities hide more. The quote was based on what the tradie could see, and sometimes the truth is uglier. Real reasons for a mid-job change include rotted timber discovered when a kitchen comes out, a wiring problem that wasn’t listed in the original electrical fault, a slab that turned out to be thicker than expected. Less reasonable reasons include I forgot to include this in the quote, my supplier put their prices up last week, or the apprentice took longer than I budgeted. The first set is part of the work. The second set is the tradie’s risk to manage, not yours.
Stop the work, then have the conversation
Don’t let the conversation happen with the tools still running. As soon as a tradie raises a possible variation, ask them to stop the affected work. Not the whole job, just that piece. The reason is simple. If the work continues while you are discussing the new price, you have already accepted the variation by inaction. By the time you say no, the cost is already incurred and the argument gets messy. A quick pause to talk costs you nothing. Continuing the work without agreement costs you the negotiating position.
Ask what specifically changed, and when they knew
The first thing to ask is precisely what is different from the original quote. Not the rough story, the specific scope difference. When you opened the wall, you found three additional studs that needed replacing because they were rotted. Then ask when they realised. If the answer is this morning when we opened it up, that is reasonable. If the answer is actually we noticed it on day one but didn’t mention it, that is a different conversation. Late-flagged variations are a pattern worth noticing, especially if they keep happening on the same job.
Cross-check it against the original quote and exclusions
Pull out the original quote and look at the exclusions and allowances together. Sometimes the new work is actually inside the original scope, just framed as if it isn’t. Sometimes it falls into an allowance that has already been priced and only the difference is owed. If the new charge is additional plumbing work behind the wall, check whether the original quote included an allowance for any additional plumbing repairs found on disconnect, $400. If yes, you only owe the gap above that figure, not the full new number. Read the document, don’t argue from memory.
Get the new number in writing before the next tool comes out
Verbal agreements about extra money are how friendly jobs turn into resentful ones. Ask the tradie to send you a one-paragraph variation in writing, even just a text message, with the description of the new work, the new price, and any additional time it adds to the schedule. Reply in writing with your approval. That short trail prevents the most common dispute on Reviewey, which is two people remembering different versions of a phone call. It also makes the final invoice trivial to reconcile.
When the answer is “this is just how it goes”
Some tradies will respond to questions about a variation with a sort of defeated shrug. Mate, this is just how building goes, you find stuff, the price moves. That isn’t an answer. That is a vibe. The real answer is what specifically was found, what specifically was the original scope, and what the dollar gap actually represents. If the tradie can’t articulate that, you have a problem that is bigger than this variation. Keep the question gentle but keep asking. A good tradie will explain it without much fuss.
If they refuse to pause, that is your answer
If you ask the tradie to stop the affected work while you discuss a price change and they say no, refuse to send the new figure in writing, or push past the conversation and continue, that tells you a lot about the kind of operator they are. You are now dealing with someone who treats the variation as a fait accompli rather than something that needs your sign-off. Document the moment. Note the time, the figure they are claiming, and the request you made. You may need that record later. Reviewey works because the record exists.
Pay for what you agreed to, and not before
When a variation is fair and clearly explained, pay it without dragging your feet. That keeps the relationship clean and gives the tradie no excuse to slow down. When a variation isn’t fair, pay the original quoted amount and the parts of the variation you agree with, and write down clearly which parts are in dispute. The worst outcome is to either pay everything to avoid the awkwardness, or refuse to pay anything until it is resolved. Pay the agreed work. Disagree about the disputed work. Keep the two separate so the conversation stays narrow.
Mid-job price increases are not automatically a problem, but they are never a small thing either. Stop the affected work, ask exactly what changed and when they knew, cross-check against the original quote, and put the new number in writing before any more work happens. A tradie who is running an honest job will welcome the conversation. A tradie who isn’t will reveal themselves quickly. Either way, you’ll have the record you need.