Is an Emailed Quote a Contract? What One High Court Case Means for Getting a Trade Invoice Paid (2026)

By Daniel Sedgwick, founder and managing director of Checker and a former gas engineer. He writes practical guides for UK trade businesses on field workflows, paperwork and admin.

Updated 23 October 2026

TLDR: An emailed quote can become a binding contract when the parties agree sufficiently clear work and prices and intend to be bound. An email reply can record acceptance. A provisional costing awaiting further discussion is different. Keep the complete agreement behind your invoice, including later decisions and approved changes.

The work can be good, finished on time and still end in an argument about payment. That happened to an electrical contractor at Graven Hill in Bicester. Nobody alleged poor workmanship. The dispute reached the High Court because the parties disagreed about the contractual basis for some of the charges.

The first quote was emailed in June 2017. The appeal judgment arrived in November 2023. Six years separated those events. For a trade business, the useful lesson is to make the agreement easy to reconstruct before a disputed invoice turns into a file of old emails and half-remembered calls.

Can an emailed quote make a binding contract?

Yes. For ordinary trade work in England and Wales, an agreement needn’t arrive as a paper contract with two handwritten signatures. The Law Commission explains that most transactions require no particular execution method, and electronic signatures can be valid when the necessary intention and formalities are present.

What matters is whether the parties have reached an agreement they intend to honour, with sufficiently certain terms. A clear quote and an unqualified acceptance can establish that. A request for another price, a changed specification or an express requirement for a later signed contract needs closer attention.

Sending the quote isn’t the same as agreeing the job. Preserve the customer’s response and the version it refers to. Where a call settles an outstanding price, confirm that decision in writing. The High Court case shows why the later conversation can matter as much as the original email.

What happened between DMH Electrical and MK City?

DMH Electrical (UK) Limited carried out electrical work for MK City Group Limited on the Graven Hill development. Their directors were old school friends. MK City was a subcontractor to the main contractor, Sylva Group, and engaged DMH for electrical work. When the main contractor became insolvent, some invoices went unpaid.

In DMH Electrical (UK) Limited v MK City Group Limited [2023] EWHC 2960 (KB), Mr Justice Ritchie recorded that the work was good and completed on time. The appeal concerned two agreements, their scope and how DMH had described its claim to the court.

Did the June email exclude the ventilation units?

The court upheld the finding that the first agreement included installing the mechanical ventilation heat recovery units, despite their prices being absent from the original quote. The email was awaiting the wholesaler’s figures; those prices were supplied before the parties reached agreement.

The 21 June 2017 quote priced electrical installations by house type. Its wording about MVHR units was central to MK City’s argument that this work fell outside the pleaded contract. The judge read the email alongside the dealings between the parties, their evidence and the agreed pricing schedule. The judgment explains this at paragraphs 29 to 32 and 41 to 48.

An item genuinely excluded from the job and an item awaiting a supplier price need different wording. Give each an explicit status so the customer and the person raising the invoice can understand it later.

Why did provisional prices still become payable?

The second agreement became binding because later discussions turned provisional figures into agreed prices. The High Court expressly said that the February 2018 quote was not itself a binding offer in the circumstances. It was the starting point for a further agreement.

MK City had requested rough costings for electrical installations in different house sizes, plus optional upgrades. DMH supplied them. The directors then discussed the figures, DMH kept its prices and the parties agreed to proceed on that basis. Calling the earlier document provisional didn’t undo the agreement they subsequently made.

The court also rejected the uncertainty argument. The parties knew the site, the basic work for each house type, the products and unit prices, and how buyers would select upgrades. They performed the contract on that basis. Paragraphs 49 to 56 explain why the missing final house quantities didn’t defeat this particular bargain.

Keep the distinction clear on your own jobs: a provisional figure, the discussion that settles it, and the final instruction to proceed are separate pieces of the record. The case doesn’t establish that every estimate binds the customer to its first total.

Did the court award every pound claimed?

No. The original claim was £157,916. MK City paid £85,188 around the time the first trial date was vacated, leaving £72,728. The trial judge awarded £63,185. Some extra works were rejected because they hadn’t been properly pleaded, meaning included in the formal claim put before the court.

The appeal was dismissed on 21 November 2023, with £15,554 in appeal costs including VAT awarded to DMH. That is the court’s order; it doesn’t tell us whether the money was subsequently collected.

The practical consequence goes beyond keeping emails. Your legal claim must explain the agreement and the money sought. Practice Direction 16, paragraphs 7.3 to 7.5, addresses written agreements, oral agreements and agreements by conduct. Give an adviser the whole trail, including variations and calls, rather than an invoice total alone.

What changes when your customer is a homeowner?

A domestic consumer has protections beyond whether a contract was formed. DMH was a dispute between businesses. An accepted quote for a homeowner doesn’t remove your duty to perform a service with reasonable care and skill under the Consumer Rights Act 2015, or settle a genuine complaint about the work.

• Cancellation rights: covered distance and off-premises contracts have cancellation rules. For services, the usual period ends 14 days after the contract day; contracts involving goods can have different timing. Check regulation 30 against the actual contract.
• Starting early: where those rules apply, get the required express request before starting within the cancellation period. An off-premises request must be on a durable medium. Regulation 36 also sets conditions for payment on cancellation and loss of the cancellation right after full performance.
• Urgent repairs: regulation 28 exempts specifically requested urgent repair visits, but doesn’t automatically exempt additional work or goods beyond the necessary replacement parts.

An email alone doesn’t determine which category the contract falls into. Check how it was made. Keep consumer terms clear and fair too: the CMA’s customer-contract guidance, updated in July 2026, explains why an unfair term cannot be relied upon. Have your domestic-work terms checked before a dispute exposes a gap.

Which five records should sit behind your next invoice?

Keep the accepted scope, unresolved exclusions, acceptance, later changes and invoice connection together. The aim is to show how the parties reached the amount now being requested, including any decision made after the first quote.

1. Define the scope. Identify the contracting customer, property and work. Link the specification or drawing version used for pricing. State what each price covers, whether VAT applies, and any agreed timing or payment terms.
2. Separate exclusions from pending prices. Name work you won’t supply. Label supplier-dependent prices and provisional allowances separately, with the decision still needed. Don’t leave the office to guess whether an omitted figure means excluded work.
3. Keep written acceptance. Preserve the reply against the exact quote version. Record who accepted and for whom. After a phone agreement, send a written confirmation of the scope and settled prices and ask the customer to confirm it.
4. Confirm variations in writing. Keep the original agreement intact. Record the change, price effect, approval and any timing change. Make the customer’s decision retrievable before the extra charge reaches the invoice.
5. Tie the invoice to the agreement. Reference the accepted work and approved variations, show payments already received and explain the balance. Check the required invoice details, including the unique number, customer details, description, dates and tax information.

We keep quotes, jobs, signed paperwork and invoices together in Checker, with quote and invoice chasers and an invoice payment link. That helps the office find the commercial record and follow up. A stored signature still needs to relate to the right document; software can’t decide whether the disputed sum is legally due or guarantee payment.

Use our quote-to-job-to-invoice workflow for the handoff and the complete job-record guide for supporting paperwork. Retain personal information for justified purposes, including relevant potential claims, rather than indefinitely. The ICO’s storage-limitation guidance explains that balance.

What should you do when an invoice is disputed?

Identify the precise disputed item and match it to the agreement before sending another chase. If the argument concerns an exclusion or a provisional sum, retrieve the later instruction that resolved it. A solicitor should assess a contested contractual claim; a payment app can’t settle that question.

Our overdue-invoice guide covers follow-up once the position is clear. For unresolved debts in England and Wales, GOV.UK explains money claims and mediation. Scotland has its own court-claim process; Northern Ireland has separate debt-recovery procedures. The English appeal doesn’t replace advice on the law and route governing your job.

For a spoken walkthrough of the same dispute, watch Tradesmen Getting Paid: One Quote Email, Six Years, One High Court Appeal.

Frequently asked questions

Authoritative sources

1. National Archives: DMH Electrical v MK City, official judgment.
2. Law Commission: electronic execution and signature formalities.
3. Justice: Practice Direction 16, contractual claims.
4. Consumer Rights Act 2015: reasonable care and skill.
5. Consumer Contracts Regulations: cancellation periods.
6. Consumer Contracts Regulations: starting services during cancellation periods.
7. Consumer Contracts Regulations: urgent repair exceptions.
8. CMA: writing a fair consumer contract.
9. GOV.UK: required invoice details.
10. GOV.UK: money claims in England and Wales.
11. mygov.scot: Scottish court claims.
12. nidirect: Northern Ireland debt recovery.
13. ICO: retaining personal data for justified purposes.
14. Video: Tradesmen Getting Paid: One Quote Email, Six Years, One High Court Appeal, Schmitdy Trades, YouTube.