Extra work is not the problem. Extra work nobody priced is. The fix is a two-line note sent the same day, before the work starts, not an invoice argument at the end.
Scope creep rarely arrives as a demand. It arrives as “while you’re here”, “can you just”, and a small addition that takes forty minutes and is never billed. Do that twice a week and you have given away a day a month.
What counts as a variation
Anything that is not in the written scope: a different finish, a larger area, a second visit, a change of mind after materials are ordered, or work made necessary by something the client did not mention.
The test is not size, it is whether you would have priced the job differently had it been there at quoting. If yes, it is a variation, however small. The quote builder helps here because a quote with explicit exclusions turns “can you just” into a visible step over a line.
The same-day note
Two sentences, sent before you start the extra work, not after. It protects the relationship as much as the invoice, because it means the client chooses rather than discovers.
Include: what the addition is, what it costs, and when you can do it. Do not include: an explanation of why it was not in the original quote. That invites an argument about the quote instead of a decision about the work.
Write a same-day variation note for extra work a client has just asked for. DETAILS - Original scope: [one line] - What they have asked for: [describe] - Extra cost: [amount] or [amount + hours] - Effect on the schedule: [none / adds X days / needs a second visit] - Whether it needs materials ordering: [yes/no] Rules: two or three sentences. Confirm what it is, state the price, give the earliest date. No apology and no explanation of why the original quote excluded it. End with a yes/no question so the client has to reply.
Pricing extras without a fight
Extras cost more per hour than the original job, and that is fair rather than cheeky: they interrupt a schedule, they often need a second trip, and they carry the same admin as a job ten times the size. A minimum charge for extras is easier to defend than a per-hour rate that starts at twenty minutes.
Quote the extra as its own job. “The extra sockets are 180, and I can do them Thursday” is a decision. “It’ll be a bit more, I’ll add it on” is a future argument.
Help me price an addition fairly without overcharging. CONTEXT - The extra work: [describe] - Estimated time: [hours] - Materials: [cost] - Whether it needs another visit: [yes/no] - My normal rate: [amount per hour or day] - Minimum I charge for extras: [amount, or ask me to suggest one] Give me a single price with one sentence of justification a customer will accept, the reasoning behind it in three bullets, and the number below which I should decline the extra and finish the original job instead.
When to absorb it
Sometimes the right answer is to do it free: the error was yours, the client is a long-standing one and the addition is ten minutes, or the goodwill is worth more than the money. Absorb deliberately and say so out loud: “I’ll cover that one.” Unspoken generosity is invisible and sets a precedent you did not agree to.
What not to absorb: anything that becomes a pattern, anything that needs materials, and anything that makes the next client’s quote wrong because you have quietly redefined the standard.
Updating the original quote
Three variations on one job should produce a revised total, in writing, before the final invoice. Clients who receive a bill 40% above the quote dispute it, even when every extra was agreed verbally. Clients who receive a revised total in advance rarely do.
Produce a revised quote covering variations on a job already underway. INPUTS - Original quote total: [amount] - Variations agreed so far: [list each with its price] - Variations declined: [list, or none] - Revised total: [amount, or calculate it] Output: a short revised quote showing the original figure, the variations as separate lines with their prices, and the new total. Add one line confirming the completion date if it has moved. Keep it under 150 words so it can be pasted into an email.
The client who keeps adding
Three variations is a job going normally. Ten is a client who did not scope properly, and the tenth conversation should be about the rest of the job rather than the next small addition. Say it once, plainly: “We’re well past the original scope; shall we re-quote the remainder as a second phase?”
That sentence is easier to say when the first nine variations were priced and documented. It is also the moment the job profit calculator earns its keep: it shows what the job has actually made after all the additions, which is often less than it felt like at the time.
If the pattern is really about the client rather than the job, the answer may be a clearer line at the start, which is what onboarding is for. And when a variation needs refusing rather than pricing, the wording is in saying no.
Frequently asked questions
Should I charge for a quote revision?
Not for a small tweak. Yes when the brief has changed substantially or you are quoting a second time because the client never decided. Charge it as a design or consultation fee, stated up front.
What if the client says the extra was implied?
Then the original quote’s exclusions were too vague. Point at the scope line, offer to do it at the variation price, and add the exclusion to your template for next time.
Do I need a written variation for tiny extras?
Yes, and it can be one line in a message thread. Writing beats remembering, especially three weeks later when the invoice arrives.
Can I refuse to do the extra at all?
You can, and sometimes should. Finishing the agreed scope cleanly is a legitimate answer when the addition would wreck the schedule.
Last reviewed and updated on November 10, 2026.
