A written contract is the single best protection a tradesperson has against unpaid invoices, scope creep, and disputes. It does not need to be a long legal document – a clear written record of the work, the price, and when payment is due is enough for most jobs, and it takes minutes to put in place. This guide explains why contracts matter, the types you can use, and the easiest way to create one.
Why do you need a contract with a customer?
You need a contract because it protects your payment, fixes the scope of the work, and removes the ambiguity that causes most disputes between tradespeople and customers. Specifically, a contract:
- Protects your payment. It records the agreed price and when instalments are due, so there is no argument about what the customer owes or when.
- Stops scope creep. When the work is written down, "could you just…" requests become visible extras to be priced, not free additions to the job.
- Settles disputes quickly. If a disagreement does arise, the written record usually resolves it before it escalates – and if it goes further, it is your evidence.
- Wins you work. Offering a written agreement signals professionalism, and customers are more comfortable saying yes to larger jobs when the terms are clear.
Is a verbal agreement legally binding in the UK?
Yes – a verbal agreement is legally binding in the UK, but it is very hard to prove. If a customer refuses to pay, a court will want evidence of what was agreed, and with a handshake deal it is your word against theirs. Text messages, emails, and bank transfers can help piece an agreement together after the fact, but they rarely capture the full scope and price. Your legal obligations to the customer – such as carrying out work with reasonable care and skill under the Consumer Rights Act 2015 – apply either way, so working verbally only ever removes your protection, not your responsibilities. Put the agreement in writing before you start.
What types of contract can tradespeople use?
Tradespeople can use anything from a written quote accepted by message to a formal industry-standard contract – the right choice depends on the size and complexity of the job.
A verbal agreement
A spoken agreement is a real contract, but as covered above it is the riskiest option because nothing is provable. Avoid relying on one for anything beyond trivial work.
A written quote accepted in writing
A written quote that the customer accepts by email or message forms a binding contract, and for many small and medium jobs it is all you need. Make sure the quote states the work, the price, and payment terms – a one-line "supply and fit kitchen, £4,500" leaves too much open.
A simple written contract
A short document – often one or two pages – signed by both sides, covering scope, price, payment schedule, and start date. It is a step up from a quote because both parties actively agree the same terms in one place, including how changes and problems will be handled.
An industry-standard contract
For large projects such as extensions or full renovations, formal contracts like the JCT Home Owner range set out detailed terms covering delays, insurance, and dispute resolution. They offer the strongest protection but involve more admin and cost, so they are rarely proportionate for everyday jobs.
What should a contract with a customer include?
At a minimum, a contract should name both parties and set out the scope of work, the price, and when payment is due. A good agreement covers:
- The parties – your business name and the customer's name and address.
- Scope of work – what you will do, in enough detail that an extra is obviously an extra.
- Price – the total, whether it includes VAT, and what is excluded.
- Payment schedule – deposits and staged payments tied to milestones, not just a single bill at the end.
- Dates – when work starts and the estimated completion.
- Variations – how changes to the work are agreed and priced.
- Materials – who supplies them and who pays.
- Cancellation – note that for contracts agreed in the customer's home, consumers normally have a 14-day cancellation right under the Consumer Contracts Regulations 2013.
How does Renofy help?
Renofy gives you a digital job agreement – scope, quotes, milestones, and payment records in one place – without any paperwork. You send a quote broken into milestones, the customer accepts it in the app, and that acceptance creates a clear written record of exactly what was agreed. Payments can be tied to individual milestones, so there is also a record of whether the customer has paid and exactly what each payment was for. Changes along the way are agreed and recorded the same way, and your messages with the customer stay attached to the job. It has the protection of a contract with the ease of a handshake, and it is free to use.
Create a free Renofy account to put a written agreement behind your next job, or read more about how it works in our FAQ.