How Much Does It Cost to Start a Heating & Plumbing Business in 2026?

In this article, we break down every cost, itemised. Two totalled scenarios at the end: one if you’re already qualified with a van, and one starting from scratch.

BREAKDOWN OF COSTS

What You’ll Actually Spend Setting Up Your Business

Qualifications & Registration

• Plumbing qualifications (NVQ Level 2/3) — £1,000–£3,000 if you still need to qualify. Many engineers already have these from their employed days. CSCS card: £36 plus £22 for the test.
• Gas Safe registration — £409 per year for a sole trader.
• CIPHE membership — £100–£150 per year. Not compulsory, but builds credibility when you’re new.
• Waste carrier registration — free (lower tier) if you’re only carrying waste from your own jobs. Required by law if you’re taking old boilers, pipes, or radiators to the tip.
• Qualifications total: £0 (already qualified) to ~£3,500 (from scratch, including Gas Safe)

Tools & Equipment

If you’ve been doing side jobs, you’ll own some of this already. Here’s what a full kit looks like:

• Basic plumbing toolkit (pipe cutters, wrenches, spanners, soldering gear) — £300–£500 to fill gaps
• Flue gas analyser (Kane, Anton, or Testo) — £500–£900.
• Pipe freezing kit — £100–£200
• Manometer for gas pressure testing — £80–£150
• SDS drill — £150–£300
• Multi-gas detector — £100–£200
• Inspection camera — £50–£150

Tools total: £400 (topping up) to £2,200 (buying everything)

Read more: List of essential tools and apps for gas engineers

Your Van

The biggest single cost for most engineers.

• Used van (Transit Custom, Vivaro, Partner-type) — £5,000–£12,000. Smaller options like a Berlingo or Combo start at £3,000–£5,000
• New van — £25,000+. Rarely makes sense as a startup cost
• Van racking (shelving, pipe storage) — £300–£800 basic, £1,000–£2,000 for modular systems (Sortimo, Bott)
• Signage (vinyl lettering or partial wrap) — £150–£400. Every job you park outside is a potential referral
• Running costs year one (fuel, servicing, tyres, MOT) — £2,000–£3,500

Van total: £5,500 (used, basic fitout) to £15,000+ (newer van, full racking, signage)

Insurance

You can’t skip this, and you shouldn’t cheap out on it. See our full guide to insurance for gas engineers here.

• Public liability — £150–£300/year for £2m cover. Most customers and letting agents expect it
• Commercial van insurance — £800–£1,500/year. Often the second biggest annual cost
• Tool and equipment insurance — £80–£200/year. Covers theft from the van
• Professional indemnity — £100–£200/year. Covers claims that your advice caused financial loss
• Employer’s liability — £80–£150/year. Only needed once you hire staff, but it’s a legal requirement when you do

Insurance total: £1,130–£2,200 per year

Software & Admin

The admin side is where new businesses leak time — and time is money when you’re a sole trader.

• Accounting software (Xero, QuickBooks, FreeAgent) — £12–£35/month. Keeps HMRC happy and makes tax returns painless – plus is required under the new MTD regulations.
• All-in-one certificates, job management & invoicing — Gas Engineer Software handles certificates, invoicing, scheduling, and customer records from £24.99/month. One app instead of cobbling together separate tools

Software total: £50–£90/month

Marketing & Getting Your First Customers

If you’ve been doing side jobs, word of mouth is already working for you. This is about making it official. Read our full gas engineer marketing guide here. 

• Google Business Profile — free. The single most important thing you’ll set up. Add photos, get early reviews
• Basic website (Wix, Squarespace) — £200–£600. Services, contact details, and a way to get in touch
• Trade directories — useful for filling your diary in the first year
• Business cards and flyers — £50–£100. A card left on the kitchen counter after a job still works

Marketing total: £300–£1,300 in year one

The Total — What It All Adds Up To

Scenario 1: Already qualified, have a van and basic tools

Scenario 2: Starting from scratch

Most engineers fall somewhere in between. The key is knowing which costs are non-negotiable (Gas Safe, insurance, a reliable van) and which can be phased in as work builds.

How Quickly Can You Earn It Back?

The average self-employed plumber and heating engineer charges £50–£60 per hour in 2026, with daily rates of £300–£400 depending on region. If you want to know whether your rates are competitive, we’ve broken down the numbers by region and job type.

Scenario 1’s £3,759 setup costs? Roughly 10–12 working days at average rates. Even Scenario 2’s £16,529 works out to around 6–8 weeks of full-time work.

If you’re ready for the full process, our guide to starting a heating and plumbing business covers everything from registrations to landing your first customers. And if you want the invoicing, certificates, and scheduling sorted from day one, try Gas Engineer Software for free — no commitment, no card required.