Bookkeeping for UK Trade Businesses — How to Keep Your Accounts in Order Without an Accountant (2026)
Most tradespeople hate admin. That's understandable — you got into the trade to work with your hands, not stare at spreadsheets. But poor bookkeeping is quietly one of the most expensive mistakes a trade business can make. HMRC can investigate your records up to four years back for errors, and up to 20 years if they suspect deliberate fraud. Beyond the investigation risk, disorganised accounts mean higher tax bills, missed expense claims, and a nasty surprise every January when your self-assessment is due. This guide covers exactly what records you need to keep, how to keep them without spending hours on admin, and what software is actually worth paying for in 2026.
Why Bookkeeping Matters More Than You Think
There are three concrete reasons sloppy bookkeeping costs trade businesses money — not just stress.
1. HMRC investigations
HMRC can open an enquiry into any self-assessment return within 12 months of filing. For suspected errors, the window extends to four years. For careless errors, six years. For deliberate fraud — including undeclared income or inflated expenses — they can go back 20 years. You need records to defend yourself. "I can't find the receipt" is not a defence.
2. You pay tax on profit you didn't need to
If you can't evidence an expense, HMRC will disallow it. That means you pay 20% (or 40% if you're a higher-rate taxpayer) on income you should have been able to offset. A sole trader spending £5,000/year on tools, fuel and subscriptions who can't produce receipts is potentially overpaying £1,000–£2,000 per year in tax. Over a decade, that's a van.
3. Cash flow visibility
You can't manage what you can't see. Tradespeople with no real-time view of their numbers routinely undercharge, fail to chase unpaid invoices, and run out of cash in slow months. Good bookkeeping gives you the visibility to act before problems become crises.
What Records You Must Keep — and For How Long
HMRC sets minimum retention periods: five years after the 31 January submission deadline for self-employed sole traders, and six years for limited companies. In practice, keeping everything for seven years is the safe standard. Here's what counts as a record:
- ›Invoices issued — every job you invoiced, including the date, amount, VAT (if applicable), customer name and description of work.
- ›Invoices received — from suppliers, subcontractors, tool hire companies, anyone you paid for the business.
- ›Bank statements — both business and personal if you use a personal account for business (though you really shouldn't).
- ›Receipts for cash purchases — cash purchases without receipts cannot be claimed. Get the receipt, photograph it immediately.
- ›Mileage log — date, start and end location, purpose of journey, miles driven. HMRC will ask for this if you claim vehicle costs using the approved mileage allowance payment (AMAP) method.
- ›VAT records — if VAT-registered, you must keep VAT invoices (which show the supplier's VAT number), import/export records, and a VAT account showing the VAT you've charged and reclaimed. MTD for VAT is already mandatory.
- ›Payroll records — if you employ anyone, PAYE records including payslips, P60s, P45s and Real Time Information (RTI) submissions to HMRC.
- ›CIS records — if you operate under the Construction Industry Scheme, deduction statements from contractors, your monthly returns if you're a contractor, and verification numbers for subcontractors.
Important: Digital copies are accepted by HMRC provided they are legible and reproducible. A photo of a receipt on your phone counts — as long as it's backed up somewhere permanent. Shoebox of paper receipts that gets flooded or burned is not a defence.
Making Tax Digital for Income Tax — What Changes in 2026 and 2027
Making Tax Digital (MTD) for Income Tax Self Assessment (ITSA) is the biggest change to UK tax administration in decades. It replaces the annual self-assessment return with quarterly digital submissions for most self-employed people. Here is the rollout schedule:
| Date | Who is affected | What you must do |
|---|---|---|
| April 2026 | Self-employed with income over £50,000 | Submit quarterly updates to HMRC via MTD-compatible software. Annual end-of-period statement still required. |
| April 2027 | Self-employed with income over £30,000 | Same requirements. Also includes landlords with qualifying income above the threshold. |
| TBC (likely 2028+) | Self-employed with income £20,000–£30,000 | Date not yet confirmed by HMRC as of June 2026. |
What this means in practice: if your turnover is above £50,000 you can no longer do your books in a spreadsheet and hand them to an accountant in January. You need MTD-compatible software — Xero, QuickBooks, FreeAgent, Sage and a handful of others are all compliant. The quarterly submissions are not full tax returns; they're summaries of your income and expenses for the quarter. But they need to be based on accurate, up-to-date digital records. Leaving everything until the end of the year is no longer an option.
Accounting Software: Which One Should a Tradesperson Use?
All of the major platforms are MTD-compliant. The differences come down to price, mobile experience, payroll features and how well they handle the specific things tradespeople care about — mileage tracking, CIS, subcontractor payments and purchase invoices. Here's the honest comparison:
| Software | Monthly cost | Best for | Key strengths | Weaknesses |
|---|---|---|---|---|
| Xero | £15–£47 | Growing businesses with employees | Bank feeds, invoicing, payroll add-on, strong accountant integration, huge app ecosystem | Payroll costs extra; mobile app less intuitive than QuickBooks |
| QuickBooks | £12–£35 | Sole traders and small teams | Excellent mobile app, mileage tracking built-in, strong self-employed plan, easy to use | Can feel clunky at the higher tiers; CIS handling less polished than Xero |
| FreeAgent | £19 (free with NatWest / RBS / Mettle) | Sole traders who bank with NatWest group | Free if you use a qualifying business account, great self-assessment dashboard, MTD-ready | Not as feature-rich for limited companies; payroll is basic |
| Sage | £13–£33 | Businesses needing strong payroll | Payroll is the best-in-class at this price point; strong compliance tools; CIS support | UI feels dated; bank feeds less reliable than Xero; mobile app is basic |
| Spreadsheets | Free | Very simple sole traders below £30k turnover | Flexible, familiar, zero cost | Not MTD-compliant on their own; no bank feeds; error-prone; no real-time visibility |
Our recommendation: if you're a sole trader with a NatWest, RBS or Mettle business account, start with FreeAgent — it's free and does everything you need. If you're a limited company or have employees, Xero is worth the monthly cost. If you're on your phone constantly and want the smoothest mobile experience, QuickBooks is marginally ahead. If payroll is your biggest headache, look at Sage.
The Chart of Accounts for a Trade Business
When you set up accounting software, it asks you to categorise your income and expenses. Most default templates are built for retail or office businesses. Here's how a trade business's chart of accounts should actually look:
Sales (Income)
- › Labour income — what you charge for your time
- › Materials income — if you invoice materials separately at a margin
- › Call-out / emergency fees
- › Service contract income (if recurring)
Cost of Sales (Direct Costs)
- › Materials purchased for jobs
- › Subcontractor costs (labour-only)
- › Plant and equipment hire for specific jobs
- › Skip hire and waste disposal (job-specific)
Overheads (Indirect Costs)
- › Van: finance payments or depreciation, road tax, MOT, servicing
- › Fuel (or mileage allowance if using AMAP rates)
- › Tools and equipment (not job-specific)
- › Insurance — public liability, tools, van, professional indemnity
- › Phone (business proportion)
- › Software — accounting, job management, marketing
- › Advertising and marketing
- › Trade subscriptions (Gas Safe, NICEIC, NAPIT, CHAS etc.)
- › Training and CPD
- › Accountant and bookkeeper fees
- › Workwear and PPE
- › Home office (if applicable)
- › Bank charges
Keeping cost of sales separate from overheads matters because it lets you calculate your gross margin (sales minus direct costs), which tells you whether your job pricing is actually profitable before you factor in running costs. Many tradespeople only look at net profit and miss the fact that certain types of job — often heavy materials jobs — are being done at a poor margin.
Allowable Expenses for Tradespeople — The Full List
HMRC allows expenses that are "wholly and exclusively" for business purposes. For tradespeople, the list is substantial. Here is what you can claim and the rules around each:
| Expense | Claimable? | Rules and notes |
|---|---|---|
| Tools and equipment | Yes | Hand tools, power tools, test equipment. Can claim full cost in the year of purchase via Annual Investment Allowance (AIA) for items used exclusively for business. |
| Van — actual costs | Yes | If the van is used solely for business, you can claim 100% of running costs: fuel, insurance, servicing, road tax, MOT, plus capital allowances on purchase price. If there is private use you must apportion. |
| Fuel / mileage (AMAP) | Yes | If using AMAP (approved mileage allowance payments), claim 45p/mile for the first 10,000 business miles per tax year, 25p/mile after that. You cannot claim actual fuel costs and AMAP — choose one method and stick to it. |
| Workwear and PPE | Yes | Safety boots, hi-vis, hard hats, overalls, gloves. Must be protective or have a logo making it unsuitable for everyday use. Ordinary clothing — even if worn only for work — is not allowable. |
| Phone | Partial | If you have a dedicated business phone, claim 100%. If you use a personal phone for work, claim the business-use proportion. A separate business SIM is cleaner for HMRC purposes. |
| Trade subscriptions | Yes | Gas Safe registration, NICEIC/NAPIT approval, CHAS/Constructionline, CIPHE, JIB, FMB membership fees. Must be on HMRC's approved list of professional organisations. |
| Training and CPD | Yes | Courses that update or maintain existing skills. First Aid, PASMA, IPAF, CSCS revision. Note: costs to acquire a brand new trade qualification are not allowable as a business expense (they are capital). |
| Insurance | Yes | Public liability, employers' liability, professional indemnity, tools, commercial vehicle insurance. Not life insurance or private health cover (though some income protection policies are partially deductible). |
| Marketing spend | Yes | Google Ads, Facebook/Meta Ads, Checkatrade/Rated People fees, van signage, leaflets, website costs, software subscriptions for marketing tools. All allowable provided wholly for business. |
| Accounting software | Yes | Xero, QuickBooks, FreeAgent, Sage subscriptions. Fully allowable. |
| Accountant fees | Yes | Bookkeeper and accountant fees for business accounts and tax returns. Fully allowable. |
| Home office | Small amount | HMRC flat rate of £6/week if you work from home, or a proportion of actual costs. Most tradespeople use the flat rate as their home office use is genuinely minimal. |
| Client entertainment | No | Taking a client for lunch or a round of golf is not an allowable expense. HMRC does not consider entertaining clients to be wholly for business purposes. |
| Fines and penalties | No | Parking fines, speeding fines, HMRC penalties. Not allowable under any circumstances. |
Mileage Logging — The Right Way to Claim Your Van Costs
Vehicle costs are typically the second-biggest claimable expense for tradespeople (after labour). Getting the method right — and keeping the evidence — is worth real money.
HMRC Approved Mileage Allowance Payment (AMAP) rates
- › 45p per mile — first 10,000 business miles in the tax year
- › 25p per mile — every business mile after 10,000
- › Motorcycles: 24p/mile (all miles). Bicycles: 20p/mile.
For a tradesperson doing 15,000 business miles a year, that's 10,000 × £0.45 + 5,000 × £0.25 = £4,500 + £1,250 = £5,750 off your taxable income. At the basic rate that's £1,150 less tax. Worth tracking.
Your mileage log must record: the date, start location, end location, purpose of the journey, and number of miles. Commuting from home to a fixed regular workplace is not allowable. Driving to different customer sites each day almost always is.
Apps that make this easy:
- ›MileIQ — auto-detects trips using GPS, swipe to classify as business or personal. About £4/month. Integrates with most accounting software.
- ›TripLog — similar auto-logging with more reporting options. Good for teams with multiple vehicles.
- ›Google Timeline — free, already on your phone. Not specifically a mileage log but provides a GPS record you can retrospectively use to produce a log. HMRC accepts this as supporting evidence provided it's accurate.
- ›QuickBooks built-in mileage tracker — if you already use QuickBooks Self-Employed or Simple Start, the mileage tracking is included in the app.
Bookkeeper vs Accountant — When to Hire Each
These are different roles and different costs. Knowing which one you need (or whether you need both) saves money.
Bookkeeper
Handles day-to-day recording: reconciling your bank account, categorising transactions, chasing invoices, running payroll, preparing VAT returns. Does not typically give tax advice or prepare your full accounts.
Typical cost:
- › £20–£50/hour for ad hoc work
- › £100–£300/month for basic monthly bookkeeping package
Accountant
Prepares your annual accounts and tax return, gives tax planning advice, handles HMRC correspondence, advises on business structure (sole trader vs limited company). Not needed for month-to-month admin.
Typical cost:
- › £300–£1,000/year for a sole trader
- › £800–£2,500/year for a limited company
The typical setup for a sole trader doing £60k–£150k turnover: do your own bookkeeping using software, pay a bookkeeper £150–£250/month to check it and handle VAT returns, and pay an accountant £600–£900/year for the self-assessment return and any tax planning. This costs roughly £2,400–£4,000/year but saves that much again in correctly claimed expenses and avoided errors.
Limited companies always need an accountant to prepare statutory accounts and file with Companies House. There is no way around this.
Monthly Bookkeeping Habits — A Practical Checklist
The tradespeople with the cleanest accounts are not the ones who spend hours on admin. They are the ones who do ten minutes at the end of each week and one hour at the end of each month. Here's what the monthly routine looks like:
Bank reconciliation
Match every transaction in your accounting software to your bank statement. Flag anything that doesn't match and investigate it. This catches errors, missed invoices and fraud early.
Receipt capture
Upload and categorise all receipts from the month. Use Dext (formerly Receipt Bank) or AutoEntry to photograph receipts and have them automatically read and pushed into your accounting software. Don't wait until year-end to do this — receipts fade and get lost.
Invoices sent and outstanding
Check which invoices are unpaid. Anything over 14 days should get a follow-up. Anything over 30 days needs a formal chase. Your software should show your aged debtors report at a glance.
Payroll run (if applicable)
Process payroll, submit RTI to HMRC, ensure pension contributions are paid across to your provider on time. Late pension contributions can trigger auto-enrolment penalties.
Mileage log update
If you use an app, review and confirm all trips for the month are categorised correctly. If you log manually, transfer the month's log to your records now rather than trying to remember it in April.
Profit and loss review
Look at your P&L for the month. Is your gross margin where it should be? Are overheads creeping up? Are you on track for your annual revenue target? Five minutes of review monthly beats one nasty surprise in January.
Your marketing spend is a claimable business expense
Trade2Base tracks every pound of marketing spend — Google Ads, Meta, Checkatrade, lead sites — so you have a clean, categorised record ready for your bookkeeper or accountant. Fully documented and claimable come tax time.
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