AI for trades and construction firms: what to automate first in 2026

Answer every missed call and web enquiry within minutes, then have AI draft the quote for a person to check. This guide found no independent UK survey of how many trade enquiries go unanswered, so estimate the value from your own call log.

What a missed call is worth

A worked example uses three assumptions. The firm misses 6 calls a week, 1 in 5 of those callers would have booked, and the average job earns £300 of gross profit. That is 6 × 0.2 × £300 = £360 a week, or £18,000 over 50 working weeks. Your phone provider's call log gives the first number and your job records give the other two.

A missed-call text-back is the simplest fix. The system texts the caller within minutes, asks what the job is, where it is and for two or three photos, then creates the enquiry in the job management tool. A voice agent that answers the call goes further, and the guide to AI receptionist costs in the UK compares the published prices.

Quotes and estimates

AI drafts the quote, and the estimator prices it. The draft pulls line items from the site notes, the measurements the estimator took and the firm's own price list, then attaches the customer's photos. Photos help the AI describe the job, but they are not a survey, so a person checks every quantity and price before the quote goes out. The saving is the typing, not the judgement.

Automate the chasing and the CIS preparation, and keep the filing and the judgement calls with a person. Both follow fixed rules, so they suit automation well.

Chasing invoices

An invoice chaser sends reminders on a schedule from Xero, QuickBooks or Sage and stops the moment the payment lands. UK law backs the final reminder. GOV.UK says a business can charge statutory interest of "8% plus the Bank of England base rate for business to business transactions", and it can claim fixed debt recovery costs.

The chaser can add the interest and the fixed sum to a final reminder once a person approves it.

CIS paperwork

The Construction Industry Scheme has fixed dates, fixed rates and fixed penalties, according to HMRC's guidance on GOV.UK.

• Contractors check with HMRC that subcontractors are registered, and usually deduct 20% for registered subcontractors, 30% for unregistered ones and 0% for those with gross payment status. On £2,000 subject to deduction, that is £400 at 20% or £600 at 30%.
• Payment and deduction statements go to subcontractors within 14 days of the end of each tax month. For the tax month of 6 May to 5 June, the deadline is 19 June.
• The monthly return is due by the 19th, and a month with no payments needs a nil return or an inactivity request.
• A late return costs £100 at one day late, £200 at two months, and the higher of £300 or 5% of the deductions at six months. Later still, HMRC can charge up to £3,000 or 100% of the deductions.

AI's job here is preparation. It matches each subcontractor invoice to the job, checks the verification status is on file, totals the month, drafts the statements and reminds the bookkeeper before the 19th. The return itself goes through the firm's accounting software, and Xero lists contractor CIS returns as a £5 a month add-on to its Ignite plan.

Keep anything that sets a price, decides who works for you or signs off safety with a named person.

• Prices and quotes. The estimator approves every quote before it goes out.
• Employment status. HMRC's CIS guidance tells contractors to check whether a worker should be an employee, and a penalty can follow if they should have been. That is a judgement for a person.
• Certificates and safety. The qualified engineer tests, signs and issues.
• Disputes, variations and payment plans. A person handles anything that changes the contract.
• Money. A person approves every payment out and every final demand.

Yarigai is a done-for-you AI agency in London. It builds lead capture and booking flows, invoice chasers, document reading and filing and AI agents inside a client's own accounts, which for a trades firm means its phone system, job management tool and accounting software. The firm owns the code, the data and the accounts from day one.

A project starts with a free 30-minute scope call on Google Meet, and the firm keeps the notes whether it hires Yarigai or not. A blueprint of about a week, credited to the build, sets out a written plan, a clickable prototype, the monthly running cost, a fixed price and the payback maths. The build takes 2 to 6 weeks with a demo of working software every week, and a single workflow, such as the missed-call reply, can go live in about two weeks.

A person approves anything that sends money, emails a customer or deletes data. AI and hosting bills are paid by the client at cost, and the running cost is on the quote. Yarigai's guarantee is one sentence: "If the build isn't profitable for you, we won't build it." Yarigai has no published case study with a trades or construction firm. Its finance and operations work is on the AI finance automation and AI for operations pages.