How to Set Up Boiler Service Plans That Create Recurring Revenue

Here’s something that most heating engineers know but very few actually do anything about: the single biggest difference between a business that survives and a business that thrives is recurring revenue.

Think about it. Right now, your income probably looks like a series of peaks and valleys. Busy autumn and winter when the boilers start playing up. Quieter spring and summer when everyone forgets their heating exists. You’re constantly chasing the next job, the next quote, the next customer. It’s exhausting.

Now imagine starting every month knowing that £3,000, £5,000, or £10,000 is already coming in before you’ve even picked up the phone. That’s what a properly structured service plan does for your business. And it’s nowhere near as complicated to set up as you might think.

Why Recurring Revenue Changes Everything

I’ve worked with hundreds of plumbing and heating businesses, and the ones that sleep well at night all have one thing in common: predictable income. Service plans are the simplest way to build it.

Here’s what changes when you have recurring revenue in your business:

• Cash flow becomes predictable. You know what’s coming in each month. You can plan, invest, and make decisions with confidence instead of crossing your fingers.
• Seasonal dips disappear. Your service plan income lands every month regardless of whether it’s July or January.
• Customer retention skyrockets. A customer on a service plan doesn’t ring three companies for quotes when something goes wrong. They ring you.
• Your business becomes more valuable. If you ever want to sell your business, recurring revenue is the number one thing buyers look for. More on that in Planning Your Exit: Building a Business That Runs Without You.
• Marketing costs drop. It’s far cheaper to keep an existing customer on a plan than to find a new one.

Structuring Your Plans: The Bronze, Silver, Gold Model

The most effective approach is a tiered system. Three plans, three price points, three levels of cover. It works because it gives customers a choice (which people like), and the middle option naturally becomes the most popular (which is exactly what you want).

Bronze Plan — The Basics

This is your entry-level plan. It gets customers in the door and builds the habit of paying you monthly.

What’s included:

• Annual boiler service
• Boiler safety check and certificate
• Priority booking for repairs (within 24–48 hours)
• 10% discount on parts and labour for any repairs

Suggested pricing: £8–£12 per month (£96–£144 per year)

For context, a standalone annual boiler service typically costs £70–£100. So the customer is paying a small premium for the convenience of spreading the cost, getting priority booking, and getting a discount on repairs. Fair deal for them, steady income for you.

Silver Plan — The Sweet Spot

This is where you make your money. The Silver plan should be the one you actively recommend. It offers enough value that customers feel properly looked after, and the margins are excellent.

What’s included:

• Everything in Bronze, plus:
• Parts and labour cover for boiler repairs (with a reasonable annual cap, e.g. £250–£500)
• No callout charge for covered repairs
• Annual system health check (radiators, pressure, inhibitor levels)
• Priority booking within 24 hours

Suggested pricing: £15–£20 per month (£180–£240 per year)

The repair cover is what makes this plan attractive. Homeowners hate unexpected bills. Paying £17 a month for the peace of mind that their boiler repairs are covered? That’s an easy yes for most people.

Gold Plan — The Full Package

The Gold plan is for customers who want complete peace of mind. It’s your premium offering, and while fewer people will take it, those who do are your highest-value customers.

What’s included:

• Everything in Silver, plus:
• Higher parts and labour cap (e.g. £500–£1,000 per year)
• Central heating system cover (not just the boiler)
• Emergency callout cover (evenings and weekends)
• Annual full system flush or powerflush discount
• Boiler replacement discount when the time comes

Suggested pricing: £25–£35 per month (£300–£420 per year)

Pricing Your Plans: Getting the Numbers Right

The key to profitable service plans is understanding your average cost to serve each customer. Here’s a simple way to work it out.

For a Silver Plan at £17/month (£204/year):

Your costs:

• Annual service visit (your time): £40–£60 (30–45 minutes including travel)
• Average repair cost per customer per year: £30–£60 (remember, not every customer will need a repair every year — the average across all customers is what matters)
• Administration and management: £10–£15
• Total average cost per customer: £80–£135

Your profit per customer: £70–£125 per year

That might not sound like much on its own. But multiply it by 100 customers and you’re looking at £7,000–£12,500 in annual profit from service plans alone, with £20,400 in guaranteed annual revenue.

And that’s before you factor in the additional boiler replacements, upgrades, and referrals that come from having a loyal customer base.

Getting your pricing right on service plans is just as important as getting it right on installations and repairs. If you want a structured approach to pricing any job properly, The Quote Handbook gives you the frameworks and worked examples to make sure every price you set is profitable.

Technology for Managing Service Plans

You can’t manage 100+ service plan customers with a spreadsheet and a diary. Well, you can, but you’ll lose track of services, miss renewals, and create a mess that costs you customers.

Here’s what you need:

Payment Collection

Set up Direct Debit collection through a provider like GoCardless. This is far more reliable than standing orders (which customers can cancel without telling you) and it’s professional. GoCardless charges around 1–2% per transaction, which is a small price for guaranteed, automated payment collection.

Job Management Software

Your job management system should track which customers are on plans, when their annual service is due, and what level of cover they have. Most modern platforms — Commusoft, Fergus, ServiceM8, Jobber — have features that can handle this. If you’re still running your business on paper or basic spreadsheets, read Choosing the Right Job Management Software for Your Plumbing & Heating Business to understand your options.

Automated Reminders

Set up automated emails or texts to remind customers when their annual service is coming up. This saves you time, reduces no-shows, and makes you look professional. Most job management platforms can handle this, or you can use a simple email marketing tool.

Reporting

Track your key metrics monthly: total plan customers, new sign-ups, cancellations, revenue, and average cost to serve. This tells you whether your plans are profitable and where you need to adjust.

Marketing Plans to Existing Customers

Your existing customer base is your goldmine. These are people who already know you, trust you, and have paid you money. Converting them to service plan customers is much easier than finding new ones.

At the Point of Installation

The best time to sell a service plan is when you’ve just installed a new boiler. The customer is already spending money, they’re thinking about protecting their investment, and you’re right there to explain the options.

Try something like: “Your new boiler comes with a [X]-year manufacturer warranty, but to keep that warranty valid, it needs an annual service. Our Silver plan covers that service plus any repairs for £17 a month. Most of our customers sign up because it gives them peace of mind and saves them money in the long run.”

During Existing Service Visits

If you’re already doing one-off annual services, every single one is an opportunity to convert that customer to a plan. After the service, mention: “By the way, we do offer a service plan that covers this annual service plus repair cover for £17 a month. It works out cheaper than paying for the service separately, and if anything goes wrong during the year, you’re covered.”

Email and Letter Campaigns

Write to your past customers. A simple letter or email explaining your service plans, with a clear comparison of costs (plan vs paying as you go), can generate a decent response. Include a QR code or link to sign up online.

Referral Incentives

Offer existing plan customers a month free (or a £25 credit) for every new customer they refer who signs up to a plan. Word of mouth is still the most powerful marketing tool in the trades.

Revenue Projections: What This Could Look Like

Let’s map out a realistic growth trajectory for your service plan business:

Year 1

• Sign up 50 customers at an average of £15/month
• Monthly recurring revenue: £750
• Annual revenue: £9,000

Year 2

• Grow to 120 customers (new sign-ups + existing customers converting)
• Monthly recurring revenue: £1,800
• Annual revenue: £21,600

Year 3

• Grow to 200 customers, average plan value increases to £18/month as more choose Silver and Gold
• Monthly recurring revenue: £3,600
• Annual revenue: £43,200

By year 3, you’ve got over £43,000 in guaranteed annual revenue before you’ve quoted a single installation or repair. That’s a game-changer. It covers your fixed costs, it smooths out the seasonal dips, and it gives you the financial stability to invest in growth.

And every single one of those plan customers is a future boiler replacement. When their boiler reaches end of life, who are they going to call? The company that’s been looking after them for the past 5 years. That’s a pipeline of high-value work that builds automatically.

Common Pitfalls to Avoid

• Underpricing your plans. Don’t race to the bottom to compete with British Gas HomeCare. You’re offering a personal, local service. Price accordingly.
• Not capping repair cover. Without an annual cap on parts and labour, one expensive repair can wipe out a year’s profit from that customer. Set clear limits.
• Forgetting the terms and conditions. Get proper T&Cs written up. What’s covered, what’s not, what happens if they cancel, age limits on boilers you’ll cover. This protects you and the customer.
• Not selling actively. Plans don’t sell themselves. Every engineer in your team should be trained to mention service plans at every customer interaction.
• Ignoring cancellations. If customers are leaving, find out why. A quick phone call to a cancelling customer can often save the relationship — and tells you if there’s a problem with your offering.

The Bigger Picture

Service plans aren’t just about the monthly income, though that’s transformative in itself. They’re about building a business that has stability, predictability, and genuine value. A heating business with 200+ service plan customers is worth significantly more than one without — because a buyer is buying guaranteed future revenue, not just a list of past customers.

Getting service plans right requires systems — payment collection, scheduling, customer management, and reporting. If your business systems need tightening up, The Systems Handbook walks you through building the operational foundations that make services like this run smoothly without you having to manage every detail personally.

And if you want someone in your corner helping you build recurring revenue, set up the right systems, and grow your business properly, that’s what we do at Together We Build. Whether it’s our Business in a Box membership or one-to-one coaching, we’ve helped hundreds of heating businesses make exactly this kind of shift.

Ready to start building recurring revenue? Get in touch and let’s talk about setting up service plans that work for your business.