How to Price a Job When Material Costs Keep Changing
How to price a job when material costs keep changing is one of the most practical challenges facing UK tradespeople in 2026. Copper prices track global commodity markets. Timber fluctuates with European supply. Specialist components like heat pump units and solar inverters carry their own price volatility. Get your approach wrong and you’re absorbing cost increases that should be passed on.
The Core Principle: Quote Current Costs, Not Last Month’s
The single most important rule when material costs are changing: price every job based on today’s material costs, not what you paid last month or what you charged on a similar job six months ago.
This requires a small discipline change in your quoting process: before building any significant quote, check current prices for the main material components. For electrical work, that means checking copper cable prices at CEF or Rexel. For plumbing, checking pipe and fitting prices. For heating, checking boiler trade prices with your merchant or manufacturer.
It takes 5-10 minutes and can save you hundreds of pounds on a single job.
Quote Validity Periods
Set a clear quote validity period and state it on every quote. The standard is 30 days – after which material prices may have changed sufficiently to affect your cost. A 30-day validity is fair to the customer while protecting you from committing to a price based on materials costs that may have moved.
For larger projects (full rewires, major central heating installations, solar installs), consider stating:
“This quotation is valid for 30 days from the date of issue. Material prices are subject to change. We will notify you of any material price changes exceeding 5% before ordering.”
Separate Materials From Labour in Your Quotes
Presenting materials and labour as separate line items in your quote has multiple advantages:
- Transparent for the customer – they can see what is labour and what is materials
- Easier to update if material prices change before the job starts
- Protects you if materials prices increase between quote and job start
- Makes your labour value visible – customers see what they’re paying for your expertise, not just a single number
If you quote a single lump sum and materials prices rise 8%, your only options are to absorb it or have an awkward conversation. If materials are itemised, a price change notification is routine and professional.
Include Provisional Sums for Uncertain Material Quantities
For jobs where material quantities aren’t fully known until work starts (rewires where cable runs aren’t accessible, plumbing work behind walls), include a provisional sum:
“Provisional sum for additional cable runs and containment where existing routes are not accessible: £150.”
This sets the customer’s expectation that not everything is known at quote stage and gives you a documented basis for any additional charge.
Free calculator by CoreQuote — the quoting app for trades
Frequently Asked Questions
How do I tell a customer that materials have gone up since I quoted?
Contact them before ordering, explain the specific cost change, and provide an updated price. Most customers accept a reasonable materials increase when communicated professionally and before work starts. Presenting a surprise cost increase at invoice stage is where disputes happen.
Should I stockpile materials when prices are low?
For high-volume standard materials (standard cable sizes, common pipe sizes, standard fittings), buying ahead when prices are favourable can make sense if you have the storage and cash flow. For project-specific materials, buy as needed for each job to avoid tying up working capital.
What does a good quote template look like for separating materials and labour?
A good quote includes: job scope, materials specification and cost, labour cost (hours and rate or fixed price), any provisional sums, total price, VAT, payment terms, and quote validity. CoreQuote provides tradespeople with a professional quote template that handles this cleanly.
CoreQuote helps tradespeople build transparent, itemised quotes with separate materials and labour – protecting your margin when costs change. Try free for 6 months at kwowta.com.
Related reading:
- How to Write a Quote That Wins the Job (With Free Template)
- How to Follow Up a Quote Without Being Pushy
- How to Ask for a Deposit Without Losing the Job
- How to Write Terms and Conditions for a Construction Quote
Want to quote faster? CoreQuote is a free quoting app built specifically for UK trades businesses — create professional quotes in seconds, get digital sign-off from customers, and convert to invoices with one tap.
