I've been installing boilers for over a decade. I've quoted against engineers who were £800 cheaper than me and engineers who were £800 more expensive than me. I've won jobs where I was the most expensive quote. I've lost jobs where I was the cheapest.
Pricing is mostly about confidence and presentation, not just costs. But you do need to start with the numbers.
What a boiler installation actually costs in 2026
Let's be honest about the market first. Combi boiler installation prices across the UK in 2026 are roughly:
- —Budget market (new-build, simple swap): £1,800–£2,500
- —Mid-market (standard domestic, like-for-like swap): £2,500–£3,500
- —Premium (complex, system upgrades, extended runs): £3,500–£5,500+
These are full supply-and-fit prices. Regional variation is significant — London and the South East run 20–30% higher than the Midlands or North.
If you're regularly quoting below £2,000 for a standard combi swap in the South East in 2026, you're undercharging.
How to calculate your minimum price
Before you can charge confidently, you need to know your floor — the minimum you can charge and still make a living.
Your daily cost of being in business:
Work out your annual overheads: van finance/depreciation, insurance, Gas Safe registration, tools, phone, fuel, software, accounting. Divide by your working days (220 is a reasonable figure). This is your daily overhead rate.
For most sole traders, this is £80–£150/day.
Your labour:
What do you want to earn per day? £250/day is £55,000/year (220 days). £350/day is £77,000/year. Be honest with yourself about what you want and what the market in your area supports.
Materials:
Boiler cost (Worcester Bosch 4000 with 10-year warranty runs around £650–£750 trade). Flue, fittings, filter, inhibitor, sundries — add £150–£250 depending on the job.
A standard one-day combi swap floor price:
- —Materials: £850–£1,000
- —Labour (your target): £300–£400
- —Overheads: £100–£150
- —Total: £1,250–£1,550
That's your floor for a genuinely simple, one-day, like-for-like swap. Everything else — job complexity, second fix, system flush, distance, parking, access — adds to this.
Most engineers price from the floor. You should price from the value.
Price from value, not cost
The floor calculation tells you what you need. Pricing from value tells you what you can get.
A customer with a broken boiler in January is not price-sensitive. They're cold, they have no hot water, and they want it fixed by someone they trust today. The value of solving that problem is not £2,000. It's considerably more.
A landlord with a tenant complaining about heating is not price-sensitive — they're compliance-sensitive. Speed and paperwork matter. If you can be there tomorrow and have the Benchmark done and filed, that's worth a premium.
Stop quoting what you think the customer wants to hear. Quote what the job is worth.
Why your website affects what you can charge
This is the bit most engineers don't connect.
When a customer calls two plumbers and gets two quotes, the one with the better-looking, more credible website wins — even if it's slightly more expensive. The website signals quality before you've said a word.
I've tested this directly. Same job, same spec, same boiler brand — quoted £200 higher after I improved my website. Win rate went up, not down. The customers who dropped off were the ones I didn't want anyway.
A professional website doesn't just help you find more customers. It helps you charge more for the ones you do find.
How to quote without apologising for your price
The engineers who consistently charge in the top 30% of their market all do the same things:
Quote in writing, not verbally. A written quote looks more considered and professional. It also protects you.
Break it down. Itemise the boiler (with model number and warranty), labour, any additional work. Don't just say "£2,800 all in." Show them what they're getting.
Lead with the warranty. "This comes with a 10-year manufacturer warranty, which I register on installation" is worth a lot to a homeowner. Make sure they know it.
Don't discount. If a customer asks you to lower your price, ask what they'd like to remove from the scope. If the answer is nothing, the price stands. Most won't push back a second time.
Follow up. If you don't hear back within three days, send one message: "Just checking in on the quote I sent over — happy to answer any questions." A significant percentage of delayed jobs come back from that one follow-up.
The pricing mistake most engineers make
They price for the customer they think is in front of them, not the customer who actually chose to call them.
If someone found you through Google, saw your professional website, read your reviews, and then picked up the phone — they've already pre-qualified themselves. They're not on Checkatrade looking for the cheapest. They're looking for someone trustworthy who can do the job right.
Charge accordingly.
If you want a website that attracts customers who are pre-sold on quality rather than chasing the cheapest quote, book a 30-minute call. We'll talk about what that looks like for your business.