Trade Business Bookkeeping Guide UK — How to Keep Your Accounts in Order (2026)

Why bookkeeping matters for tradespeople

Good bookkeeping is not just about satisfying HMRC — though that alone is reason enough. It also means you know whether each job type is actually profitable, you can spot cash flow problems before they become crises, and you have clean financial records if you ever need a business loan, lease a van on finance, or sell the business.

HMRC requires you to keep business records for at least 5 years after the 31 January submission deadline for the relevant tax year — in practice, this means keeping records for around 6 years from the end of the tax year they relate to. For VAT-registered businesses, the requirement is 6 years from the date of the document. Failing to keep adequate records can result in penalties of up to £3,000 per tax year on top of any tax owed.

• Accurate tax returns: under-reporting income is a serious risk; over-paying tax because you can't evidence your expenses wastes money.
• Knowing your profit: turnover is vanity, profit is sanity — you need to know what you keep after all costs.
• Spotting problems early: chasing unpaid invoices, identifying months where costs spiked, seeing whether fuel and materials are eating into margin.
• Getting finance: lenders and leasing companies ask for accounts; a business with clean records gets better terms.

Recording income and expenses

The two core bookkeeping tasks are recording what comes in and what goes out. For a trade business, income means sales invoices raised to clients and any payments received. Expenses cover everything spent running the business.

Income to record:

• Sales invoices issued to domestic or commercial clients
• Receipts from clients (especially where payment comes before the invoice, such as deposits)
• Any other business income such as grant payments or sale of old equipment

Expenses to record:

• Material receipts and supplier invoices
• Subcontractor invoices (and CIS deductions withheld)
• Fuel and vehicle running costs
• Tool and equipment purchases
• Insurance premiums (public liability, van, tools, professional indemnity)
• Phone, broadband and software subscriptions used for the business
• Protective clothing and workwear
• Accountancy and bookkeeping fees
• Advertising and marketing spend

Keeping business and personal finances in separate bank accounts is not a legal requirement for sole traders, but it is critical in practice. Mixing personal and business transactions makes reconciliation slow, increases the chance of missing legitimate expenses, and gives HMRC a harder picture to unpick if you are ever investigated. Open a dedicated business current account — many banks now offer free or low-cost accounts specifically for sole traders and small businesses.

Cash basis vs accruals basis

There are two ways to recognise income and expenses in your books, and the one you use affects when your tax liability falls due.

Cash basis means you record income when you actually receive payment and expenses when you actually pay them. If you raise an invoice in March but the client pays in May, the income appears in May. This is simpler and matches your bank account more closely, which is why HMRC introduced it for small businesses.

Accruals basis (also called traditional accounting) means you record income when the invoice is issued and expenses when they are incurred, regardless of when cash moves. A March invoice counts as March income even if the client pays in May.

For self-assessment, self-employed tradespeople with trading income below £300,000can use the cash basis. Most sole traders benefit from it: fewer timing adjustments, no need to track debtors and creditors separately, and the accounts more naturally reflect what is in the bank. The cash basis does restrict some interest deductions and the treatment of certain assets, so talk to your accountant if your business is growing quickly or you have significant borrowing.

Limited companies cannot use the cash basis for corporation tax — they must use accruals. This is one reason good bookkeeping matters more as you grow.

Bank reconciliation

Bank reconciliation means matching every transaction in your bookkeeping records to a corresponding line on your bank statement. Done regularly — weekly or monthly — it is the single most effective way to keep your books accurate.

It matters because:

• It catches errors, such as an expense entered twice or a client payment posted to the wrong invoice.
• It flags missed transactions — a direct debit for insurance that never made it into your books.
• It can catch theft or fraud if someone else has access to your accounts.
• It ensures your profit and loss figures are based on real data, not guesswork.

To reconcile: export your bank statement for the period, then go through your bookkeeping records and match each entry. Most cloud software does this automatically by pulling in your bank feed and suggesting matches. For transactions that appear on the bank statement but not in your records, create the missing entry. For entries in your records that have no matching bank transaction, investigate — either the payment hasn't cleared yet (fine, it will appear next time) or there is an error that needs correcting.

Making Tax Digital

Making Tax Digital (MTD) is HMRC's programme to move tax record-keeping and submission to digital systems. For trade businesses it affects two taxes.

MTD for VAT has been mandatory for all VAT-registered businesses since April 2022. You must keep digital VAT records and submit returns through MTD-compatible software. The old manual submission portal is gone. If you are VAT-registered and not yet using MTD-compatible software, you are already non-compliant.

MTD for Income Tax (MTD for ITSA) is the bigger change for most tradespeople:

• From April 2026: mandatory for self-employed individuals and landlords with qualifying income over £50,000 per year.
• From April 2027: mandatory for those with qualifying income over £30,000.
• Further thresholds for lower income levels are still under consultation.

Under MTD for ITSA, you must keep digital income and expense records throughout the year and make quarterly submissions to HMRC summarising your income and expenses — plus a final end-of-year declaration. Your annual self-assessment tax return as it currently exists will be replaced by this quarterly + final submission process.

HMRC-approved software for MTD includes Xero, QuickBooks, FreeAgent, and Sage. Spreadsheets alone are not sufficient unless used with a bridging solution approved by HMRC.

Cloud bookkeeping software: a comparison

Paper records and spreadsheets can get a sole trader through the early years, but cloud software makes reconciliation, VAT returns, and MTD compliance significantly easier. Here are the main options used by UK trade businesses:

• Xero (£16–£52/month): the most popular platform among UK accountants. Strong bank feed integration, invoicing, payroll, CIS support, and a large ecosystem of add-ons. Best for growing trade businesses or those working with an accountant, as most accountants can access your Xero file directly.
• QuickBooks Self-Employed (from £8/month for sole traders): simple income and expense tracking with automatic mileage logging. Designed for sole traders who want something very lightweight. Limited functionality compared to the full QuickBooks Online product, but low cost and easy to use.
• FreeAgent (from around £19/month, but included free with NatWest, Royal Bank of Scotland, Ulster Bank, and Mettle business accounts): excellent for sole traders and small limited companies. Clean interface, good invoicing, automatic VAT returns, self-assessment support, and MTD-compatible. Worth checking your bank account eligibility before paying for it elsewhere.
• Sage Accounting (£16–£39/month): a long-established accounting brand, popular with more traditional businesses. Solid invoicing and VAT handling, CIS support in higher tiers. Interface is less modern than Xero or FreeAgent but well supported by accountants.

All four are HMRC-recognised for MTD for VAT submissions. When MTD for Income Tax becomes mandatory, all are expected to support it. Choose based on your accountant's preference, your budget, and whether your bank offers free access to one of them.

Tracking CIS deductions

If you work as a subcontractor under the Construction Industry Scheme (CIS), the main contractor deducts tax from your payments before they reach you — 20% if you are registered under CIS, 30% if you are not. These deductions are not a final tax liability; they are payments on account of your income tax and National Insurance.

To ensure you are not paying tax twice, you need to:

• Record every CIS deduction suffered — note the gross amount, the deduction, and the net amount paid on each payment received from a main contractor.
• Keep all CIS payment and deduction statements — contractors are required to provide these monthly. They are your evidence when claiming the deductions back.
• Use deductions to reduce your tax bill — at year end, your accountant offsets total CIS deductions suffered against your income tax and Class 4 NIC liability. If deductions exceed what you owe, you get a repayment.

Most cloud accounting software has a dedicated CIS module. In Xero and QuickBooks, you can record CIS suffered on each transaction and run reports showing the total for the year. If you also act as a main contractor and deduct CIS from your subbies, there are separate filing obligations — monthly CIS returns to HMRC.

Receipts and evidence

HMRC requires evidence for every business expense you claim. Without it, the expense can be disallowed on investigation — even if you genuinely incurred it.

Acceptable evidence includes: supplier invoices, VAT receipts, bank or credit card statements showing the transaction, and till receipts. A bank statement alone is generally not sufficient for HMRC — it shows money left your account, but not what you bought or whether it was for business purposes.

Photographing receipts is fully acceptable. HMRC allows digital copies. Apps like Dext (formerly Receipt Bank), Hubdoc, andAutoEntry let you photograph receipts on your phone; they extract the key data (supplier, date, amount, VAT) and push it directly into your accounting software. This eliminates the box of crumpled paper receipts and means every expense is recorded at the moment of purchase rather than weeks later.

For vehicle costs, HMRC requires a mileage log if you are claiming business mileage at the approved rate (currently 45p per mile for the first 10,000 business miles, 25p thereafter for cars and vans). The log should record the date, start and end points, purpose of the journey, and miles driven. Many mileage tracking apps (MileIQ, TripLog, or the mileage feature built into QuickBooks Self-Employed) automate this from your phone's GPS.

Quarterly accounts review

Even if you are not yet subject to MTD for Income Tax, reviewing your accounts quarterly is one of the highest-value habits a trade business owner can build. It turns bookkeeping from a compliance exercise into a management tool.

Every quarter, look at:

• Gross margin by job type: are bathroom installations more profitable than kitchens? Is commercial work making you more per day than domestic? You need the numbers to know.
• Biggest expense categories: which costs are growing fastest? Materials creep, fuel increases, or subcontractor spend rising without matching revenue growth are warning signs.
• Outstanding invoices: how much is owed to you and how old is it? Anything over 60 days needs active chasing; anything over 90 days may need a formal letter before action.
• Bank balance trend: is the ending balance each month trending up, flat, or down? A downward trend in a busy period means costs are growing faster than income — worth understanding why.

Spotting a problem in October is manageable. Discovering it in January when you are completing your tax return is not.

Bookkeeper vs accountant: when to use each

Many tradespeople conflate the two roles, but they are distinct. Using both correctly keeps costs down and ensures nothing falls through the gaps.

A bookkeeper handles day-to-day financial administration: coding transactions, reconciling the bank, chasing purchase invoices, running payroll, and producing monthly or quarterly management accounts. For a typical one-to-five person trade business, a part-time bookkeeper costs £20–£50 per hour, or£100–£400 per month on a fixed retainer depending on the volume of transactions. They keep your records current throughout the year so year-end is not a fire drill.

An accountant handles year-end accounts preparation, the formal tax return submission, tax planning advice, and dealing with HMRC if anything goes wrong. For a sole trader, a year-end self-assessment and accounts package typically costs£500–£1,500. For a limited company (corporation tax return, statutory accounts, director self-assessments), expect £1,000–£3,000 per year depending on complexity.

The two work best together: your bookkeeper keeps your records clean and up-to-date; your accountant uses those records to file accurate returns and advise on tax efficiency. If your accountant is spending a significant portion of your fee tidying up messy records, you are paying accountant rates for bookkeeper work. Getting a bookkeeper in — even a few hours a month — typically pays for itself in lower accountancy fees and fewer errors.