Guide

Accounting for tradespeople: Tax, invoicing, and record-keeping

Learn how to manage tax, invoicing, and records as a self-employed tradesperson in the UK.

Written by Shaun Quarton—Accounting & Finance Content Writer and Growth Marketer. Read Shaun's full bio

Published Friday 21 August 2026

Key takeaways

As a self-employed tradesperson, you're responsible for registering with His Majesty's Revenue and Customs (HMRC), filing a Self Assessment tax return each year, and paying Income Tax and National Insurance on your profits.
Keeping accurate records of all income and expenses, including receipts, mileage logs, and bank statements, is a legal requirement and helps you claim every allowable expense to reduce your tax bill.
You can claim tax relief on common trade costs such as tools, materials, vehicle mileage, insurance, and protective clothing, so tracking these throughout the year is well worth the effort.
Making Tax Digital (MTD) is changing how self-employed people keep records. Since April 2026, those earning over £50,000 are required to use compatible software to submit quarterly digital updates to HMRC.

What does accounting for tradespeople involve?

Accounting for tradespeople covers the financial tasks you need to stay on top of as a self-employed sole trader. It covers two main areas: understanding your tax obligations and invoicing your clients properly. Equally important is keeping accurate records of your income and expenses.

If you're a plumber, electrician, or builder running your own business, you'll know that admin isn't the reason you picked up the tools. But getting the financial side right protects your income and keeps you on the right side of HMRC. It could also save you money at tax time.

Tradespeople face some unique challenges compared to other self-employed workers. Your income can vary from month to month, and you're often working across multiple job sites. You're also buying materials, fuel, and tools on the go, which makes tracking expenses harder. The upside is there are plenty of allowable expenses you can claim to lower your tax bill.

This guide walks you through each step: from registering as self-employed, to understanding what tax you owe, to setting up invoices and keeping the records HMRC expects.

How to register as a self-employed tradesperson

The first step when you start working for yourself is registering with HMRC for Self Assessment. This tells HMRC you're trading as a sole trader and need to file a tax return each year. If your gross self-employment income is £1,000 or less, it's covered by the trading allowance and you may not need to register. Follow these steps to get set up.

Register for Self Assessment with HMRC by 5 October after the end of the tax year in which you started trading. For example, if you began taking on jobs in July 2026, you'd need to register by 5 October 2027. The UK tax year runs from 6 April to 5 April.
Receive your Unique Taxpayer Reference (UTR) number from HMRC. Keep this safe because you'll need it every time you file your return or contact HMRC.
Set up a system for tracking your income and expenses from day one, so you're ready when it's time to file your Self Assessment return.

Sole trader vs limited company

Most tradespeople start out as sole traders. It's the simplest way to set up: you register with HMRC, keep records, and file a Self Assessment return once a year. You and your business are treated as one for tax purposes, which means you're personally responsible for any debts.

A limited company is a separate legal entity. It can offer tax advantages if your profits are higher, but it comes with more paperwork: annual accounts, Corporation Tax returns, and Companies House filings. For many tradespeople earning under £50,000, operating as a sole trader is the more straightforward option.

If you're unsure which structure suits you, it's worth speaking to a qualified accountant who can look at your specific situation.

Understanding your tax obligations

As a self-employed tradesperson, you'll pay Income Tax on your profits, which is your total income minus your allowable expenses. You'll also pay National Insurance contributions (NICs). The main taxes break down as follows for the 2026/27 tax year.

Your personal allowance is £12,570, meaning you don't pay Income Tax on the first £12,570 you earn. After that, the basic rate is 20% on income between £12,571 and £50,270. The higher rate is 40% on income between £50,271 and £125,140.

On top of Income Tax, you'll pay two types of National Insurance. Class 2 NICs are £3.65 per week, paid voluntarily – you only need to pay if your profits are below £7,105 and you want to protect your National Insurance record. Class 4 NICs are 6% on profits between £12,570 and £50,270, and 2% on profits above £50,270.

So if you're an electrician who made £40,000 in profit this year, you'd pay no tax on the first £12,570, then 20% on the remaining £27,430. You'd also pay Class 4 NICs on top. Claiming all your allowable expenses is one of the best ways to bring that tax bill down.

When to register for VAT

You must register for Value Added Tax (VAT) if your taxable turnover exceeds £90,000 in any 12-month rolling period. It's worth keeping an eye on your turnover throughout the year so you don't miss this threshold.

If your turnover is below £90,000, you can still register voluntarily. This can make sense if most of your clients are VAT-registered businesses, because they can reclaim the VAT you charge. It also lets you reclaim VAT on materials and tools you buy for the business. For a builder regularly purchasing materials, this could add up. Xero's guide to VAT covers the basics of how it works.

Self Assessment deadlines and payment on account

Your Self Assessment tax return for the previous tax year is due by 31 January if you file online, or 31 October if you file on paper. Filing online gives you three extra months to get it sorted.

You'll also need to know about payments on account. If your tax bill is over £1,000, HMRC will ask you to make advance payments towards the following year's bill. These are due on 31 January and 31 July, and each one is half of the previous year's tax bill.

Missing these deadlines means penalties. A late filing attracts an immediate £100 fine, with further penalties for every month the return remains outstanding. Late payment triggers interest charges from day one. Filing on time, even if you can't pay straight away, avoids the late-filing penalty.

Invoicing for tradespeople

Every time you complete a job, you need to send your client an invoice. A proper invoice isn't just professional; it's how you track your income and provide the records HMRC expects.

For tradespeople, invoicing often happens on-site or straight after finishing a job. Whether you've just completed a bathroom refit or an emergency callout to fix a boiler, sending the invoice promptly helps you stay on top of your cash flow.

It's also worth understanding the difference between a quote and an invoice. A quote is an estimate you give before the work starts. An invoice is the request for payment after the work is done. Keep copies of both for your records.

What to include on your invoices

HMRC expects your invoices to include certain information. Make sure each invoice has the following details.

Your name (or business name) and contact details.
A unique invoice number.
The date you're issuing the invoice.
Your client's name and address.
A clear description of the work you've done.
The total amount due, including a breakdown of labour and materials.
Your payment terms, for example, "payment due within 30 days".

If you're VAT-registered, you'll also need to show your VAT registration number, the VAT rate charged, and the VAT amount. Xero's invoicing guide explains the full requirements for creating compliant invoices.

Using digital invoicing makes it easier to keep a consistent format, track which clients have paid, and chase up overdue invoices without shuffling through paper.

Record-keeping essentials

HMRC requires every self-employed person to keep accurate records of their business income and expenses. Good record-keeping isn't just a legal obligation; it makes your Self Assessment tax return much simpler and helps you spot where your money is going.

The key is finding a system that works for your day-to-day routine. If you're travelling between jobs all day, you need something you can update quickly rather than a system that requires hours at a desk each evening.

What records to keep

You need to hold onto records that show your income and your costs. These are the documents HMRC expects you to keep.

All sales and income records, including invoices and receipts you've given to customers
Records of all business expenses, including receipts for tools, materials, fuel, and any other costs
Bank statements for your business account
A mileage log if you're claiming vehicle expenses
Records of any personal items you use partly for business, such as your mobile phone

Separating your business and personal finances makes all of this easier. A dedicated business bank account means you can see at a glance what's coming in and going out of the business, without untangling personal spending.

How long to keep your records

You must keep your records for at least five years from 31 January following the relevant tax year. So records for the 2026/27 tax year (which you'd file by 31 January 2028) need to be kept until at least 31 January 2033.

This applies to digital and paper records alike. If HMRC opens an enquiry into your tax return, they can go back and ask to see these records, so it pays to keep them organised and accessible.

Allowable expenses for tradespeople

Allowable expenses are the costs you incur purely for business purposes. You deduct these from your income before calculating how much tax you owe, so claiming everything you're entitled to directly reduces your tax bill.

As a tradesperson, many of your day-to-day costs count as allowable expenses. The key rule is that the expense must be "wholly and exclusively" for business use.

Common allowable expenses

Tradespeople can typically claim a range of costs.

Tools, equipment, and repairs to tools you use for work
Materials and supplies you buy for jobs, such as pipes, wiring, timber, or fixings
Vehicle costs or mileage allowance for travelling between job sites
Insurance premiums, including public liability and professional indemnity cover
The business proportion of your phone and internet bills
Workwear and personal protective equipment (PPE), such as steel-toe boots, hard hats, or hi-vis jackets
Training and professional development courses related to your trade

If you're a self-employed builder, for example, the cost of site insurance, scaffolding hire, and building materials for a job would all count. An electrician could claim for testing equipment, certification course fees, and specialist tools.

Mileage and vehicle expenses

If you use your own vehicle for business travel, you have two options for claiming vehicle costs. You can either track your actual running costs (fuel, insurance, servicing, and road tax) and claim the business proportion, or you can use HMRC's simplified mileage rate.

The simplified mileage rate is 55p per mile for the first 10,000 business miles in the tax year, then 25p per mile after that. If you drive 12,000 business miles in a year, you'd claim £5,500 for the first 10,000 miles plus £500 for the remaining 2,000 miles, giving you a total deduction of £6,000.

Whichever method you choose, you'll need to keep a mileage log. Note the date, the start and end points of each journey, the purpose of the trip, and the distance covered. A quick note after each job is far easier than trying to recall your trips at the end of the year.

Making Tax Digital and what it means for your trade

Making Tax Digital (MTD) is the government's programme to move tax administration online. If you're VAT-registered, you're already required to keep digital records and file your VAT returns using MTD-compatible software.

Since April 2026, MTD has extended to Income Tax Self Assessment (MTD for ITSA) for self-employed individuals and landlords earning over £50,000. This means you'll need to keep digital records of your income and expenses and send quarterly updates to HMRC using compatible software, rather than filing a single annual return.

If your income is between £30,000 and £50,000, you'll be brought into MTD for ITSA from April 2027. From April 2028, the threshold drops further to include those with combined income above £20,000. Even if you're below these thresholds now, digital record-keeping is a good habit to build. It saves time, reduces errors, and means you'll be ready when the requirements reach you.

For tradespeople, MTD means the days of keeping a shoebox of receipts and sorting them out once a year are coming to an end – and for those earning over £50,000, that change is already here. Cloud accounting software that you can access from your phone makes it practical to log expenses and income as you go, even when you're on-site. Xero's Self Assessment guide explains how digital records fit into the Self Assessment process.

Simplify your trade finances with Xero

Managing your accounting doesn't have to eat into the time you spend on the tools. Xero is cloud accounting software built for small businesses like yours, designed to help simplify invoicing and expense tracking, while supporting tax compliance.

With Xero, you can create and send professional invoices from your phone straight after finishing a job. You can snap photos of receipts and store them digitally, so there's no more rummaging through pockets and glove boxes at year-end. Bank feeds connect your business account to Xero automatically, making it simple to reconcile transactions and keep your records up to date.

When Self Assessment season arrives, your records are already organised. And with MTD for ITSA now in effect for higher earners and expanding further in 2027, Xero is MTD-compatible software designed to help you stay compliant without adding extra admin.

FAQs on accounting for tradespeople

Here are answers to some common questions tradespeople have about managing their finances.

Do I need an accountant as a tradesperson?

You're not legally required to hire an accountant, but many sole traders find it helpful, especially for their first Self Assessment return or if their tax affairs become more complex. An accountant can also identify expenses you might have missed.

What happens if I don't submit my Self Assessment on time?

You'll receive an immediate £100 penalty, even if you don't owe any tax. After three months, daily penalties of £10 begin (up to a maximum of £900), and further charges apply at six and 12 months.

Can I use accounting software instead of a spreadsheet?

Yes. HMRC maintains a list of recognised MTD-compatible software on gov.uk, and many options offer free trials so you can find the right fit. Accounting software saves time and reduces the risk of errors compared to manual spreadsheets, regardless of your income level.

Is there a difference between a tradesman and a contractor for tax purposes?

In tax terms, what matters is whether you're self-employed or employed. A tradesperson working as a sole trader files Self Assessment and pays their own tax. If you work under the Construction Industry Scheme (CIS) as a subcontractor, the contractor deducts tax from your payments, but you still file Self Assessment to claim back any overpayment or pay any additional tax owed

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