Tax & expense guides for UK sole traders

If you're a solo sole trader who just needs receipts and UK tax-ready records, you don't need a £30/month practice tool. PocketReceipt is free, with SA103F mapping, CIS, HMRC mileage and its own accountant dashboard.

• Dext — great OCR, but built for practices and feeds separate accounting software
• PocketReceipt — free, UK-native, works on its own
• When Dext still wins, and when it doesn't

QBSE is being retired and customers migrated to QuickBooks Sole Trader (~£10/month). If you only used it to keep receipts and file Self Assessment, you can switch to a free tool instead.

• Stay paid: QuickBooks Sole Trader, FreeAgent or Xero (full accounting)
• Go free: PocketReceipt for capture, mileage and UK tax records
• How to choose — and how to keep your data

If your bill is over £1,000, HMRC adds two 50% advance payments toward next year — so your first 31 January payment is around 150% of the year's tax, with another 50% due 31 July.

• It's not extra tax — it's credited against next year
• Dates: 31 January and 31 July
• Plan ahead: set aside your effective rate

CIS takes 20% from your labour pay as an advance on tax — before expenses and your £12,570 allowance. Once those apply, most subcontractors have overpaid and can reclaim the difference via Self Assessment.

• Why you're owed: it's deducted on gross pay, not profit
• Claim via Self Assessment — refund in about 4–8 weeks
• 4 years to claim, even if you've left construction

HMRC accepts a clear photo, scan or PDF as a valid record — you don't need the paper original. You just need a legible copy showing supplier, date, amount and VAT, kept for five years after the 31 January deadline.

• Photos count — legible digital copies are valid records
• Bin the paper once the copy is clear and backed up
• Keep 5 years after the 31 January filing deadline

If you earn a bit on the side, the trading allowance can keep you out of the tax system entirely — or it can be the wrong choice once costs add up.

• Under £1,000: trading income is usually tax-free and you may not need to register
• Over £1,000: you must register for Self Assessment
• Allowance vs expenses: claim whichever is larger — not both

The most common question sole traders ask — and the answer depends on your profit after expenses. Use our free calculator to get your exact breakdown.

• Income tax: Personal Allowance £12,570, then 20% basic / 40% higher / 45% additional rate
• National Insurance: Class 2 (£3.45/week) + Class 4 (6% on £12,570–£50,270, 2% above)
• Personal Allowance taper: Reduces by £1 for every £2 earned over £100,000
• Reduce your bill: Every £1 of allowable expenses saves you 20–40p in tax

Claiming every legitimate expense is the single biggest way to reduce your tax bill as a sole trader. Many people miss hundreds of pounds because they don’t know what qualifies.

• Office & equipment: Laptops, phones, software, stationery, tools
• Working from home: Flat rate £10–£26/month or proportional method
• Travel & vehicles: 55p/mile for first 10,000 miles, 25p thereafter (or actual costs)
• Professional fees: Accountant, insurance, trade memberships
• Stock & materials: Raw materials, goods for resale, packaging

HMRC lets you claim some costs using flat rates instead of working out the actual figures. Sometimes that saves money — sometimes it costs you. Here’s how to choose.

• Vehicles: flat-rate mileage vs actual running costs and capital allowances
• Working from home: the monthly flat rate vs a proportion of real bills
• Living at your premises: the flat-rate adjustment explained

Missing a deadline costs money. Here are every date you need to know for the 2026/27 tax year, including the new MTD quarterly submission dates.

• 5 October 2026: Register for Self Assessment (if new)
• 31 October 2026: Paper tax return deadline
• 31 January 2027: Online tax return + payment deadline
• MTD quarterly: 5 Aug, 5 Nov, 5 Feb, 5 May (if applicable)
• Late filing penalty: £100 immediately, then £10/day after 3 months

You don’t always need full accounting software. For many sole traders a receipt scanner plus a good export is all HMRC needs — here’s where the line sits.

• Receipt scanner: capture, categorise and export records — often enough for simple sole traders
• Accounting software: invoicing, bank feeds and full ledgers — when you’ve scaled up
• The honest comparison: where Dext, Xero and FreeAgent fit

If MTD for Income Tax applies to you, you’ll send four quarterly updates a year plus your final return. Here’s the checklist to stay penalty-free.

• Quarterly deadlines: 7 August, 7 November, 7 February and 7 May
• Each update: cumulative totals of income and categorised expenses for the tax year so far
• Soft landing: no late-submission penalty points for quarterly updates in year one

The first year of MTD for Income Tax has a soft landing on some penalties — but not all. Know which mistakes still cost you money.

• Soft landing: no points for late quarterly updates in the first 12 months
• Still penalised: late filing of the final return and inaccurate submissions
• Late payment: the late-payment interest and penalty regime applies in full from day one

From 6 April 2026, sole traders and landlords earning over £50,000 must keep digital records and submit quarterly updates to HMRC. This is the biggest change to self-employment tax in a generation.

• Who’s affected: Sole traders and landlords with qualifying income over £50,000 (from self-employment + property). PAYE income, dividends, and savings don’t count.
• What changes: 5 submissions per year instead of 1 — four quarterly updates plus your annual tax return.
• Software required: You must use HMRC-recognised software to keep digital records. Spreadsheets only work with bridging software.
• Penalty relief: No penalty points for late quarterly updates in the first 12 months (soft landing period).
• Coming next: £30,000 threshold from April 2027, £20,000 from April 2028.

If you use your personal vehicle for business, you can claim a mileage deduction on your tax return. Most sole traders leave money on the table because they don’t log their journeys.

• Cars & vans: 55p/mile for first 10,000 miles, 25p/mile after that
• Motorcycles: 24p/mile flat rate
• Bicycles: 20p/mile flat rate
• Passengers: Extra 5p/mile per business passenger (cars only)
• Example: 8,000 business miles = £3,600 deduction = £720 tax saved at 20%

Use our free mileage calculator for an instant calculation.

HMRC can ask to see your records for years after you file. Keeping receipts accountant-ready as you go saves a painful scramble later.

• Capture early: scan receipts before they fade or get lost
• Categorise to SA103F: map every expense to the right tax box
• Keep the detail: amount, VAT, date and supplier on every record

Not all receipt scanners are built for UK sole traders. We tested 7 apps on VAT extraction, HMRC categories, mileage tracking, and export quality.

• PocketReceipt: Free, UK-focused, SA103F mapping, mileage built-in, accountant dashboard
• Dext: Powerful but needs an accounting platform on top (£24+/month)
• FreeAgent: Great all-in-one but £15/month (free with NatWest)
• Xero: Full accounting suite, receipt scanning as one feature
• 1tap / SparkReceipt: Cheap basics but no UK tax features