Contracts for UK Trade Businesses — What to Include in Your Terms and Conditions in 2026

Why written contracts matter — even when verbal ones are “legally binding”

Verbal contracts are legally binding in England and Wales. If you agree a price over the phone and do the work, the customer owes you the money. The problem is proving what was agreed. Without written evidence, a disputed job almost always turns on credibility — and judges see enough trade disputes to know that both parties genuinely remember things differently.

A signed quote, an email exchange, or even a WhatsApp thread showing the customer accepted your price is evidence. It shifts the burden: instead of you having to prove what you agreed, the customer has to explain why they accepted your quote in writing if the terms were wrong.

Written terms also protect you against scope creep, late payment, unfounded damage claims, and customers who disappear after work starts. Getting a contract in place before work begins is the single most cost-effective thing you can do for your business.

The essential clauses every trade contract must include

You don't need legal jargon. You need clarity. These are the clauses that matter:

1. Identity of parties

State both parties' full legal names and addresses. For sole traders that means your full name and business address, not just a mobile number. For limited companies, use the registered company name and number. For customers, get their full name and the property address. A contract addressed to “Dave at number 14” is almost unenforceable.

2. Scope of works — what's in and what's not

Be specific about what you will do. Then explicitly state what is not included. “Full bathroom renovation” means different things to different people. Your scope should list: strip out existing suite, supply and fit new bath, basin, WC, chrome mixer taps, and tiled shower enclosure. And then: does not include replastering walls, floor preparation below existing tiles, or decoration.

Provisional sums — where the exact cost cannot be known until work starts (e.g. “allowance for waste removal: £200 — subject to actual volume”) — should be labelled clearly as estimates that may change. If you don't flag this, the customer can argue the whole quote was a fixed price.

3. Price: fixed or estimate

Use the word “fixed price” or “estimate/quotation” explicitly. A fixed price means you carry the risk if the job takes longer or materials cost more. An estimate means the final price may vary — but only by a reasonable amount, and you must tell the customer if costs are going to increase significantly before you spend the money.

For larger jobs, break the price down by phase or trade. It makes variation orders clearer and gives the customer confidence in what they're paying for.

4. Payment terms

State exactly when payment is due: on completion, within 7 days of invoice, within 14 days, or by stage. For jobs over a few days, stage payments protect you — agree a deposit, a mid-job payment when first fix is complete, and a final payment on completion.

Include your late payment rights. Under the Late Payment of Commercial Debts (Interest) Act 1998, you can charge statutory interest of 8% above the Bank of England base rate on overdue commercial invoices, plus a fixed recovery fee (£40 for debts under £1,000, £70 for £1,000–£9,999, £100 for £10,000+). Domestic customers don't automatically get these terms, but you can include them contractually.

5. Variation procedure

This is the clause that saves most disputes. Write it clearly: any change to the agreed scope of works must be agreed in writing before the additional work is carried out. Verbal agreements to add work are not binding. Use a variation order form (even a simple one) or email/WhatsApp confirmation.

6. Materials

State who is supplying what. If you're supplying materials, state the specification — not just “tiles” but the specific product, or “tiles of equivalent quality if specified product is unavailable.” If the customer is supplying materials, make clear that delays caused by late or incorrect deliveries are not your problem and may affect the programme and cost.

7. Access and working hours

State your working hours and the access you need. If the customer isn't home during the day, get a key or code confirmed in writing. Include what happens if access is denied or delayed — you may need to charge for wasted time or reschedule at additional cost.

8. Defects liability period

A defects liability period (typically 12 months for domestic work) means you'll return to fix genuine defects that appear after completion at no extra charge. State clearly how defects are to be reported (in writing, within a reasonable time of discovery) and what counts as a defect versus fair wear and tear or damage caused by the customer.

9. Liability limitation

Limit your liability to the contract value, or a fixed amount equivalent to your public liability insurance excess. Exclude consequential losses — if your work causes a leak and the customer claims for damaged furniture, lost business, hotel costs, and emotional distress, you need this clause to cap your exposure. Note: you cannot limit liability for death or personal injury (Unfair Contract Terms Act 1977), and for consumer contracts this clause must be fair and transparent.

10. Dispute resolution

Include a tiered dispute resolution clause: informal resolution first (written notice of dispute, 14 days to resolve), then mediation if informal fails, then court. For commercial jobs, include adjudication under the Housing Grants, Construction and Regeneration Act 1996 (the Construction Act) — this gives either party the right to refer a dispute to an adjudicator within 28 days, with a binding decision in 28 days. It's faster and cheaper than court for commercial disputes.

Consumer contracts vs business contracts — the key differences

If your customer is a homeowner (a consumer), you have additional legal obligations under the Consumer Rights Act 2015 and the Consumer Contracts (Information, Cancellation and Additional Charges) Regulations 2013. These are not optional — they apply automatically, whether or not your contract mentions them.

These rights cannot be excluded in a consumer contract. Any term in your contract that tries to remove them is automatically void. You can still limit liability above and beyond these rights — but you cannot take them away.

For commercial customers (landlords, businesses, developers), the Consumer Rights Act does not apply. You have more flexibility to agree terms — but you still cannot exclude liability for negligence causing death or personal injury, and any exclusion clause must still satisfy the reasonableness test under UCTA 1977.

Variation orders: the single biggest cause of trade disputes

You start a bathroom fit-out. The customer asks if you can move the radiator while you're at it. You say yes, fine. You do it. At the end, you add £180 to the invoice. The customer says “you never mentioned a charge — I thought it was included.” You have a dispute.

This scenario plays out thousands of times a week across UK trade businesses. The fix is simple but requires discipline:

1. When a customer asks for additional work, stop. Don't say “yeah, no problem” and carry on.
2. Explain the cost. Give a number — even a rough one — verbally.
3. Send a written variation order by email or WhatsApp. It doesn't need to be formal: “Just to confirm, moving the radiator as requested will be an additional £180 + VAT. Please reply to confirm you're happy for us to proceed.”
4. Wait for their reply before doing the work.
5. Keep a variation log — a running list of all agreed changes, dates, and prices.

Both WhatsApp messages and emails count as written agreements under English law. A customer who replies “yes fine” to your WhatsApp variation order cannot later claim they didn't agree to it.

Deposit terms and the 14-day cancellation right

Under the Consumer Contracts Regulations 2013, if you visit a domestic customer's home and they sign a contract (or agree verbally, or by email) during or after that visit, they have 14 days to cancel — for any reason, with no penalty. This is the “cooling off” period.

There is one important exception: if the customer explicitly requests that work starts within the 14-day cancellation period, they waive their right to a full refund if they then cancel — but they may still be entitled to a partial refund for any work not yet done.

On deposits: state clearly in your terms that deposits are non-refundable if the customer cancels after materials have been ordered or after the cancellation period has expired. If a customer disputes a retained deposit, you'll need to show the deposit was proportionate to your actual costs and losses — so keep receipts for any materials ordered.

For jobs arranged entirely by phone or email (not visited in person), the Consumer Contracts Regulations still apply — this is a “distance contract” and the 14-day right applies. Send a written cancellation rights notice with every quote to a domestic customer.

Getting acceptance: what counts as a binding agreement

You don't need a signature on a formal document to have a binding contract. Under English law, a contract is formed when there is offer, acceptance, consideration (payment) and intention to create legal relations. All of these can be established in writing, verbally, or by conduct.

Best practice: send every quote by email, attach your standard terms, and ask the customer to reply to confirm acceptance. If they call you to accept, follow up immediately with: “As discussed, just confirming you're happy for us to proceed with the quote dated [date] — please reply to confirm.” Most customers reply within minutes, and you now have a written record.

Dispute resolution: what to do when a customer won't pay

Even with a solid contract, some customers refuse to pay. Here's the process to follow before going to court:

Step 1: Send a final invoice with a clear deadline

Send the invoice by email (so you have proof of delivery) and give a specific deadline — typically 7 or 14 days. Keep the tone professional. Most disputes resolve here.

Step 2: Send a Letter Before Claim

A Letter Before Claim (LBC) is a formal notice stating the amount owed, the basis of your claim, and that you intend to start court proceedings if the debt is not paid within 14 days. Courts expect you to send one before filing a claim — skipping it can affect cost recovery. Keep it factual and brief. You can write it yourself.

Step 3: Small Claims Court (up to £10,000)

For debts up to £10,000 in England and Wales, the Small Claims Court (a track within the County Court) is designed to be accessible without a solicitor. Filing fees range from £35 (for claims up to £300) to £455 (for claims of £5,000–£10,000). The process is online via Money Claim Online (MCOL) and takes 4–6 months on average.

If the customer doesn't respond to the claim, you can apply for a default judgment in as little as 14 days. With a judgment in hand, you can use a High Court Enforcement Officer (HCEO) to enforce payment — they can seize goods or take money from bank accounts.

Step 4: Adjudication (commercial jobs under the Construction Act)

For commercial construction contracts (not domestic homeowners), the Housing Grants, Construction and Regeneration Act 1996 gives you the right to refer a payment dispute to adjudication at any time. An adjudicator is appointed, makes a decision within 28 days, and the decision is immediately binding — the other party must pay even if they intend to challenge it in court later. Adjudication is faster than court and often used for disputes of £20,000+.

Template vs bespoke contract: what to use

For most domestic trade jobs, a well-drafted template works fine. Several industry bodies publish free or low-cost standard terms:

For jobs over £10,000, it's worth having a solicitor review your standard terms once — not for every job, but to check that your liability limitations, payment terms, and variation clauses are enforceable. A one-off review typically costs £200–£500 and applies to every job you do thereafter.

Once you have a set of standard terms you're happy with, make them part of every quote. Put them on the back of your quote document, link to them from your email footer, or attach the PDF to every quote email. The key is that the customer has a reasonable opportunity to read them before accepting.

For commercial work — particularly multi-trade refurbishments, new builds, or contracts with developers — consider using a formal construction contract such as JCT Minor Works or NEC4 Short Form. These are designed for the industry, include adjudication provisions, and are familiar to most commercial clients.

Quick checklist: before you start any job

The bottom line

A good contract doesn't prevent disputes — but it determines who wins them. The tradespeople who get paid consistently are not necessarily doing better work than those who don't. They're just better at creating a paper trail that removes any ambiguity about what was agreed.

Start with a template from your trade body. Get your standard terms reviewed once by a solicitor. Make them part of every quote you send. Follow up every verbal agreement with a message. Handle variations in writing before you do the work.

That's it. It takes five minutes per job and can save you thousands.