how to handle price increases mid-job

You quoted the job in January. You started in March. Between then and now, timber went up 15%, your supplier changed their delivery charges, and the client decided they want underfloor heating after all. Your original number is now fiction.

This happens all the time. Here is how to deal with it without losing the client or losing money.

materials going up

Material prices move. Sometimes slowly, sometimes overnight. If you quoted three months ago and prices have shifted, you have a problem — but only if you did not plan for it.

The fix starts before the job begins. When you quote, ask yourself: how stable are these prices? If you are quoting a job that will not start for two months, material costs are not Certain. They are Medium at best. Mark them accordingly and the simulation will build in a buffer.

For long lead-time jobs, include a line in your quote: "Material prices valid for 30 days. After that, prices may be adjusted to reflect current supplier costs." Simple. Professional. Gives you a mechanism to revisit if things change.

scope creep

The client says "while you are here, could you also..." and suddenly the three-day job is a five-day job. This is the number one margin killer for contractors.

The answer is always the same: yes, but it is extra. Say it kindly, say it clearly, and say it before you do the work. Not after. Once you have done it, you have no leverage.

"Happy to do that. Let me price it up and send you a variation so we are both clear on the cost." That sentence protects you every time.

how to have the conversation

Most contractors hate this part. Telling a client the price has changed feels uncomfortable. But it does not have to be confrontational. Three rules:

1. Be specific. Do not say "costs have gone up." Say "the plywood I quoted at £42 a sheet is now £51 a sheet. That adds £270 to the materials bill." Numbers are harder to argue with than feelings.
2. Show your working. Forward the supplier invoice or price list. Let them see you are not making it up. Transparency builds trust.
3. Give them options. "We can use the same plywood at the new price, or I can source a similar product at £45 a sheet. Your call." Clients want to feel in control.

variation orders

A variation order is just a written record of a change to the original scope or price. It does not need to be complicated. A short email or message that says:

Get a "yes" in writing — even a text message reply — before you start the extra work. If it ever goes sideways, that message is your proof.

protecting yourself in the original quote

The best way to handle mid-job price increases is to not need to. That means building realistic risk into your quote from day one.

If a material price could change before you buy it, do not mark it as Certain. If a subcontractor has not given you a firm price, do not mark them as Low. Use the tier that reflects what you actually know right now.

A quote built on honest uncertainty tiers already has a buffer for normal price movement. You will not need to go back to the client for every small increase — only for the big ones or genuine scope changes. That makes you look professional and reliable, not like someone who cannot price a job.

real talk

Price increases mid-job are part of the trade. They are not going away. The contractors who handle them well are the ones who quoted honestly in the first place, communicate clearly when things change, and put it in writing every time.

Build your next quote with proper risk tiers and you will have less of these conversations. When you do need to have them, you will have the numbers to back you up.