How to Quote Trade Jobs Accurately: Avoid Underpricing and Win More Work (2026 UK)

Most tradespeople who struggle with cash flow don’t have a workload problem — they have a quoting problem. They price jobs too low, win plenty of work, and still finish the month wondering where the money went. If you’ve ever got to the end of a job and realised you’ve barely broken even, this guide is for you.

Accurate quoting isn’t about charging more. It’s about charging correctly — knowing exactly what a job costs you to deliver, adding a sustainable margin, and presenting that figure with enough confidence that customers say yes. Here’s how to do it.

1. Why Accurate Quoting Matters — The Cost of Getting It Wrong

Underpricing a job costs you more than simply not winning it. When you lose a job because your quote was too high, you’re out nothing except the time spent quoting. When you win a job because your quote was too low, you commit weeks of labour, materials, and overhead — and come out the other end with less money than if you’d stayed home.

UK tradespeople frequently underprice for three reasons: they forget overhead costs, they underestimate hours, and they feel uncomfortable charging what they’re worth. A sole-trader electrician working five days a week might quote £250 per day thinking that sounds reasonable — without accounting for the van, insurance, tools, slow periods, sick days, or any profit. Once all that lands, the real break-even rate is often closer to £380–£420 per day.

Systematic underquoting also attracts the wrong customers. Price-driven customers who chose you because you were cheapest will be the first to argue over extras, delay payment, and leave negative reviews when you raise your rates. Accurate, confident pricing filters them out and builds a book of clients who value quality over lowest cost.

2. The Cost-Build Method

The most reliable way to price any job is the cost-build method: add up every cost, apply appropriate markups, and sum to a net price before VAT. Break it into four lines:

Labour

Calculate labour as: (estimated hours ÷ 8) × day rate × 1.25. The 1.25 overhead factor covers non-billable time — driving to suppliers, quoting, admin, and the hours you spend on a job that take longer than expected but that you absorb without charging. If you use subcontractors or employees, their cost goes on a separate line.

Materials

Price materials at your trade cost × a markup of 1.20–1.35 (20–35%). This covers the time spent sourcing and collecting, handling, returns, breakages, and gives you a small margin on the supply side. Customers expect a markup; it’s standard practice and entirely legitimate.

Subcontractors

If you’re bringing in a sparky, plasterer, or groundworks crew, apply a 10–15% margin on top of their quoted price. You’re taking on the coordination risk and the liability for their output — that margin is the fee for doing so.

Summing to price

Add labour + materials + subcontractors = net price. If you’re VAT-registered (compulsory above £90,000 turnover in 2026), add 20% VAT and state both figures clearly. Always confirm the VAT position in your quote — customers hate VAT surprises.

3. Calculating Your True Day Rate

Your day rate is the foundation of every quote. Get it wrong and every job you win slowly bleeds you. Here’s how to calculate it properly:

• Fixed annual costs: van (finance, fuel, tax, MOT, servicing), public liability and van insurance, tool insurance, trade body memberships (Gas Safe, NICEIC, CIPHE etc.), phone, software, accountant — add these up.
• Working days: Start with 260 weekdays, subtract holidays (25 days), bank holidays (8), sick days (allow 5–10), and non-billable admin time (at least 1 day per week) — you land around 170–190 genuinely billable days per year.
• Fixed cost per day: Fixed annual costs ÷ billable days.
• Salary target per day: The gross take-home you need ÷ billable days.
• Profit margin: Add 15–20% on top of fixed costs + salary target. This funds growth, equipment replacement, and downturns.

A sole-trader plumber targeting £55,000 take-home, with £18,000 in fixed overheads, 180 billable days, and a 15% profit margin lands at roughly £470 per day. That’s the real number — not £250, and not the first number that felt comfortable to say out loud.

4. Scoping the Job Before Quoting

The fastest route to an inaccurate quote is guessing from a phone call. A site visit takes 20–30 minutes; the cost of getting the scope wrong can be hundreds of pounds.

Site visit vs desk quote

For any job over £500, always visit in person. Desk quotes (from photos or a customer description) are fine for small, straightforward tasks — a tap replacement, a single socket addition — but they carry risk. When you visit, you can spot hidden work: rotten floor joists behind a bath panel, undersized pipework that needs upgrading, a consumer unit that needs replacing before you can do the rewire.

Questions to ask on site

• What’s the customer’s timeline and are there any hard deadlines?
• Has any previous work been done — and by whom?
• Are there any known issues (damp, subsidence, old wiring, low pressure)?
• What spec are they expecting — budget, mid-range, or premium?
• Who is supplying fixtures and fittings — them or you?
• Is parking available? Is skip placement possible?

Take photos and measurements on site. This protects you if there’s a dispute later about what you saw when you quoted, and it speeds up writing the quote when you’re back at the desk.

5. Estimating Labour Hours

Labour hour estimation improves with experience, but having reference benchmarks speeds things up — especially for less familiar job types. Some starting points for common UK trade jobs:

• Full bathroom strip-out and refit (plumbing only): 5–7 days
• Standard boiler swap (like-for-like): 1 day
• Full house rewire (3-bed semi): 5–8 days for two electricians
• Consumer unit replacement: 0.5–1 day
• Kitchen installation (fitting only, units supplied): 3–5 days
• Loft conversion (structural shell): 4–6 weeks for a small crew
• Tiling a bathroom (walls and floor, ~10m²): 2–3 days
• Render a gable end: 1–2 days depending on prep

Always add a contingency on top of your base estimate: 10% for familiar work, 15–20% for jobs with unknowns (old properties, customer-supplied materials, listed buildings). You’ll rarely need it, but when you do, you’ll be very glad it’s there.

6. Materials Pricing

Getting materials pricing right is just as important as getting labour right — on large jobs, materials can represent 40–60% of the total cost.

Trade vs retail

Always price materials at what you’ll actually pay — your trade account price at Screwfix, Wolseley, Travis Perkins, or your local merchant. Don’t use retail prices; they’ll often be 20–40% higher than what you pay, and quoting on that basis gives a distorted picture.

Wastage and contingency

Add 5–10% to your materials cost estimate for wastage and breakages. Tiles crack, pipes get cut wrong, a box of fixings runs short. Building this in means you won’t find yourself absorbing a £40 top-up trip out of your margin.

Customer-supplied materials

If the customer is supplying fixtures (a bathroom suite they’ve ordered online, for example), make this explicit in your quote. State that you’re fitting items supplied by the client, that you’re not responsible for defects in those items, and that any additional labour required to deal with incorrect or damaged supplies will be charged as a variation. This one clause saves significant headaches.

7. How to Present a Professional Quote

A professional quote does two things: it gives the customer everything they need to make a decision, and it protects you legally if the job goes sideways. A scrawled number on the back of a business card does neither.

The exclusions list is particularly important. Customers often assume “bathroom renovation” includes making good, tiling, and painting — unless you say otherwise. Spelling out what you won’t be doing sets expectations and prevents the dreaded “I thought that was included” conversation on the last day of the job.

Send the quote as a PDF, not a WhatsApp message or email with a number in the body. A PDF looks professional, is harder to alter or dispute, and gives you a clear record of what was agreed.

8. Handling the “Can You Do It Cheaper?” Conversation

Almost every tradesperson faces this. A customer likes you, wants to use you, but pushes back on the price. How you respond determines whether you win the job at a fair rate or cave and work for less than you need to.

The first rule: never simply drop the price without changing the scope. If you reduce your quote without taking anything out, you’re signalling that your original number was inflated — and you’re teaching the customer that pushing back works.

Instead, offer options that adjust what they get for a lower price:

• Scope reduction: “I can do the bathroom refit without the heated towel rail and leave the decoration to you — that brings it to £X.”
• Different specification: “If you’re happy with a mid-range basin rather than the one we discussed, I can save around £180 on materials.”
• Payment terms: “The price stays the same, but if cash flow is the issue, I can split it into three equal payments at start, mid-point, and completion.”
• Phased works: “We could do the priority items now and come back for the secondary work in a few months.”

If the customer still won’t budge and you’re already at your minimum viable margin, it’s better to walk away than to take the job and resent every day you’re on it. The jobs you lose to undercutters are usually the jobs you didn’t want anyway.

9. Variations and Change Orders

Even the most thorough quote will sometimes need to change once the job starts. A wall is opened up and rotten timbers are found. The customer changes their mind about the layout. An old pipe run needs replacing before you can continue. These are variations — and handling them correctly is the difference between a profitable job and a dispute.

How to raise a variation

Stop work as soon as you identify something outside scope. Explain to the customer what you’ve found and why it needs addressing. Give them a written variation note — even a brief email or WhatsApp message works — stating what the additional work is, what it will cost, and that you need their written approval before proceeding.

This last point is critical: never proceed with additional chargeable work on a verbal nod. Customers’ memories are selective, especially when it comes to money they didn’t expect to spend. Written approval before proceeding is your protection.

Avoiding common disputes

• Include a clause in your original quote that states work identified on site as outside the agreed scope will be quoted separately and won’t proceed without written approval.
• Take photos before and during works — particularly of anything hidden (behind walls, under floors) that you’re not responsible for.
• Keep a variation log — a running record of every change, its cost, and when approval was given — so the final invoice is never a surprise.
• Issue interim invoices on longer jobs. Don’t let variation costs accumulate for weeks and then hit the customer with a large final invoice uplift.

10. Tracking Quote Conversion Rates

Your quote conversion rate — the percentage of quotes that turn into won jobs — is one of the most useful numbers in your business. It tells you whether your pricing is right, your presentation is strong, and whether you’re quoting to the right types of customers.

What a healthy conversion rate looks like

For domestic trade work in the UK, a conversion rate of 25–40% is broadly healthy. If you’re winning more than 60% of everything you quote, you’re almost certainly underpriced — customers shouldn’t be saying yes to almost everything you send. If you’re winning fewer than 20%, something’s wrong: your price may be too high for your target market, your quote presentation may be putting people off, or you’re quoting jobs that aren’t a good fit.

What low conversion tells you

• If you’re losing jobs consistently on price, consider whether your quoting area is price-sensitive relative to your rate — or whether your quote presentation needs strengthening to justify the number.
• If customers go quiet and don’t respond, your quote may be hard to read or missing key information they need to decide.
• If you’re losing to one specific competitor repeatedly, it’s worth understanding whether they’re genuinely cheaper or just presenting differently.

Track every quote you send — date, customer, job type, value, and outcome. After three months, you’ll have enough data to see patterns. Trade2Base does this automatically, logging each quote you send, flagging ones that haven’t had a response, and showing you your conversion rate over time so you can spot trends early.