Pricing is one of the most emotionally charged aspects of running a trades business. Most business owners feel a persistent anxiety about their prices - a nagging worry that they are too expensive, that customers will go elsewhere, that they will lose work to cheaper competitors. This anxiety leads to undercharging, which leads to overwork, which leads to burnout and resentment.

The reality is that most UK plumbing and heating businesses undercharge. Not slightly - significantly. When you calculate your true cost of delivering a service, including all overheads, the picture is often sobering.

Calculating Your True Hourly Cost

Before you can set prices confidently, you need to know what it actually costs to put an engineer on the road for an hour. This calculation is more complex than most business owners realise, and the result is almost always higher than expected.

The components of your true hourly cost include:

  • Engineer salary or wages: Including employer's National Insurance and pension contributions.
  • Vehicle costs: Purchase or lease, insurance, fuel, servicing, and tyres. Divide the annual total by the number of billable hours per year.
  • Tools and equipment: Annual depreciation and replacement costs.
  • Insurance: Public liability, employer's liability, professional indemnity, and vehicle insurance.
  • Training and certification: Gas Safe registration, CPD, and any specialist training.
  • Overheads: Office costs, software, accountancy, marketing, and any other business costs not directly attributable to a specific job.
  • Non-billable time: Travel time, admin time, quote preparation, and any other time that is not directly billable to a customer. This is often 30-40% of total working time.

When you add all of this up and divide by your actual billable hours (not your total working hours), the result is your true cost per billable hour. For most UK plumbing and heating businesses with one or two engineers, this figure is typically between £45 and £70 per hour, before any profit margin.

Setting Your Prices

With your true hourly cost established, you can set prices that are both profitable and defensible. A reasonable profit margin for a trades business is 20-30% above cost. This gives you a buffer for unexpected costs, allows you to invest in growth, and provides a reasonable return for the risk and responsibility of running a business.

For a business with a true hourly cost of £55, a 25% margin gives a target billing rate of approximately £69 per hour. A standard boiler service taking 75 minutes would therefore be priced at approximately £86 - which is consistent with the market range of £80-£120 for this service.

The Myth of the Price-Sensitive Customer

The fear that drives most undercharging is the belief that customers will always choose the cheapest option. This is not true. Research on consumer behaviour consistently shows that price is rarely the primary decision factor for local service businesses - trust, availability, and reputation are all more important.

More importantly, the customers who do choose on price alone are typically the most difficult, least loyal, and most likely to leave negative reviews. They are the customers who will dispute your invoice, demand discounts, and recommend you to their friends only if you are the cheapest option. These are not the customers you want to build your business around.

"Raising prices by 10% and losing 5% of customers typically results in a net revenue increase of 4-5%. The customers you lose are almost always the ones you can afford to lose."

The customers who choose based on trust, reputation, and reliability are the ones who pay on time, recommend you enthusiastically, and come back year after year. These customers are not price-sensitive in the way the anxiety-driven narrative suggests. They are value-sensitive - they want to know that what they are paying is fair and that they are getting quality in return. Transparent, confident pricing is the most effective way to communicate that.

Communicating Price Increases

If you have been undercharging and need to raise your prices, the most important thing is to do it with confidence and without apology. A brief, professional communication to existing customers - "We are updating our pricing from [date] to reflect our current costs. Our new prices are [list]" - is all that is required. Most loyal customers will accept a reasonable price increase without complaint. Those who do not were probably not the customers you want to retain at any price.