Should I pay a deposit for a new boiler?

You have accepted a quote, and the installer has asked for money before anyone has lifted a spanner. Is that normal? Mostly, yes. Is it always fine? No. A deposit is the one part of a boiler job where the risk sits entirely with you: the installer has your money and you have a promise. So the questions that matter are how much, when, and how you pay it, because those three things decide whether a problem later is an inconvenience or a loss.

One thing to clear up first, because the word gets used two ways. This article is about paying a deposit to an installation firm. A deposit on a finance agreement, the amount you put down to reduce the borrowing, is a different animal with different rules, and we cover it separately.

Why installers ask for deposits at all

There are honest reasons. A firm fitting your boiler this week has usually ordered it, along with the flue kit, the filter and the controls, before arriving. A deposit covers materials the firm is buying on your behalf and confirms you are serious enough to hold a diary slot for. Small firms feel this hardest: one cancelled job with a boiler already on the van is a real cost to a two-person outfit in a way it is not to a national.

So a request for a deposit is not a red flag in itself. The size of the request is where judgement starts.

What a reasonable deposit looks like

Consumer guidance from the major trade platforms puts a normal deposit anywhere from roughly five to twenty percent of the job, and deposits well beyond that range are where they tell customers to start asking questions. For a boiler swap completed in a day or two, the case for a large deposit is weak: the firm is not funding months of materials and labour the way a builder on an extension might be.

The requests that should stop you are the extreme ones. Most of the money before any work starts, or all of it, moves the entire risk of the job onto you and is exactly the behaviour consumer bodies flag on rogue traders. A busy, competent firm does not need your money to function before it has done anything. If a firm says it cannot buy your boiler without full payment up front, that tells you something about the firm's finances, and none of it is reassuring.

Source: Checkatrade, deposit guidance for customers; Which? Trusted Traders, how to work with your trader

Pay some of it on a credit card, even a small part

This is the single most useful thing on this page. Under Section 75 of the Consumer Credit Act, when you buy something costing over £100 and up to £30,000 and pay any part of it on a credit card, the card provider is jointly liable with the seller if things go wrong. The whole contract is covered, not just the part you put on the card. Pay a modest deposit on a credit card and clear the balance however you like, and you have brought a second, much larger organisation into the deal on your side.

That protection bites in exactly the scenarios a deposit exposes you to: the firm takes your money and stops answering the phone, or ceases trading before the install date. Paying by debit card is second best. There is no Section 75 cover, but the chargeback scheme lets your bank attempt to reverse the payment, and while chargeback is a card industry arrangement rather than a legal right, it succeeds often enough to be well worth trying.

Source: Which?, Section 75 of the Consumer Credit Act; MoneyHelper, how you are protected when you pay by card

Never pay a deposit in cash

Cash leaves no trace. If the job goes wrong, you cannot prove the payment happened, your bank cannot help you, and no card protection exists. A discount for cash sounds friendly and costs you every protection you had. Whatever you pay and however you pay it, get the deposit stated on the written quote and get a receipt naming the company, not just a first name and a mobile number.

While you have the paperwork out, check the firm itself. Every gas boiler must be fitted by a Gas Safe registered engineer, and the register is searchable by business name for free. Thirty seconds there before any money moves is the cheapest insurance available.

Source: Gas Safe Register

What happens if the firm goes bust

This is the risk a deposit actually carries, so it deserves an honest paragraph. If a company stops trading while holding your deposit, you become one of its creditors, and an unsecured one, which puts you near the back of the queue behind the taxman and the banks. Citizens Advice is blunt about the odds: you register your claim with whoever is winding the company up, and you may get little or nothing back.

That is why the payment method section above matters more than any promise a firm makes. Section 75 and chargeback both survive the company's failure, because your claim is against the card provider or through your bank, not against the empty shell of the firm. Some firms also carry deposit protection insurance through trade membership schemes; if a firm asks for a genuinely large deposit, asking what protection sits behind it is a fair and revealing question.

Source: Citizens Advice, if a company stops trading or goes out of business

A sensible payment shape for a boiler job

For a typical one or two day installation: a modest deposit on a credit card when you accept the quote, nothing more until the work is done, and the balance when the job is complete and demonstrated. Complete means the system is running, the installer has walked you through the controls, and you have the Benchmark commissioning checklist filled in and the guarantee registration underway, not just a boiler on the wall.

An installer who objects to that shape is telling you how they handle problems generally. The good ones do not object, because it is how they already work.

The short version

A deposit request is normal. A small one, on a credit card, stated on a written quote from a Gas Safe registered firm, is a reasonable way to buy a boiler. A large one, in cash, from a firm in a hurry, is how deposit horror stories start. The difference is entirely within your control before any money moves.

If you would like quotes from vetted local installers around Northampton and Milton Keynes who put their terms in writing, tell us about the job and we will arrange them, with no obligation.