Best Invoicing App for Sole Traders UK 2026: VAT, MTD and CIS Compared

A sole trader sending invoices from a Word document or generic template is leaving money on the table — late payments, missed VAT, and zero visibility on what is outstanding. Since April 2026, Making Tax Digital has made quarterly digital record-keeping mandatory for sole traders over £50,000. The right invoicing app handles VAT, formats invoices correctly for CIS, and keeps HMRC happy with minimal extra work. Here are the 6 best options for UK sole traders.

Whether you are a plumber, electrician, builder or general tradesperson working as a sole trader, the invoicing software you choose has real consequences for cash flow, compliance and how professional you look to customers. This comparison covers pricing, VAT support, MTD compatibility and CIS deduction handling so you can make the right call for your business.

What UK Sole Traders Need from Invoicing Software

• VAT at 20% auto-calculated on invoice lines
• VAT number displayed on invoices (mandatory if VAT-registered)
• CIS deduction line support for subcontractor invoicing
• MTD-compatible data export or direct HMRC submission
• Professional PDF invoice output
• Card payment collection link sent to customers
• Overdue invoice reminders and chasing
• Job and quote history per customer

6 Best Invoicing Apps for UK Sole Traders (Comparison Table)

1. Sleepless Tradesman

Purpose-built for UK tradespeople — invoices, quotes and job management in one app. The free tier has no time limit and no invoice cap, making it the only genuinely free option that is designed specifically for the trades. VAT-compliant invoices are generated automatically, and card payment links can be sent directly to customers so they can pay without phone calls or bank transfers.

CIS invoice format is supported, clearly separating labour and materials and showing the deduction line. The homeowner marketplace gives sole traders access to new local leads alongside the invoicing and job management tools.

Best for: tradespeople who want invoicing integrated with quoting and job management, without a separate accounting subscription.

MTD note: Sleepless Tradesman handles invoicing and job records. For quarterly MTD submissions to HMRC, pair it with FreeAgent, QuickBooks or Xero — or ask your accountant to handle submissions.

2. FreshBooks

Popular small-business invoicing and accounting platform. Plans run from £15 to £55 per month and are MTD-compatible for Income Tax Self Assessment. FreshBooks has professional invoice templates, time tracking, expense tracking and project management — solid features for sole traders with more complex accounting needs.

Best for: sole traders with multiple income streams, employees, or complex project billing who want invoicing and accounting in a single subscription.

Weakness: not built for trades — no job cards, no quoting tool, no marketplace. CIS is not natively supported, so subcontractors will need to manually format CIS deduction lines.

3. QuickBooks

The dominant UK small business accounting platform. Plans from £12 to £35 per month. Fully MTD-compatible with built-in VAT return submission to HMRC, payroll add-on, and a CIS module (at additional cost). Integrates with virtually every other business tool and is used by a large proportion of UK accountants.

Best for: sole traders who want full accounting and invoicing in one place, especially those working with an accountant who already uses QuickBooks.

Weakness: steeper learning curve than invoicing-only tools; not trade-specific so lacks job management, quoting workflows or a customer marketplace.

4. Xero

Strong competitor to QuickBooks with a cleaner invoice UI and a popular accountant network. Plans from £16 to £47 per month. MTD-compatible, clean invoice design, and a CIS module available as an add-on. Xero integrates natively with trade job management tools like Tradify and ServiceM8, making it a natural fit for sole traders already using those platforms.

Best for: sole traders whose accountant is on Xero, or who use Tradify or ServiceM8 and want accounting integration.

Weakness: CIS module costs extra; price rises steeply on higher plans; not trade-specific beyond integrations.

5. Wave

Completely free invoicing and accounting software. Good for very early-stage sole traders who need basic invoicing and cannot justify a monthly subscription. Card payments are supported but charged at 2.9% + 30p per transaction.

Best for: sole traders with simple invoicing needs and very low volume who cannot afford a monthly subscription.

Weakness: US-focused product with no MTD compatibility and no CIS support. VAT handling is manual. Not recommended for UK tradespeople who are VAT-registered, CIS-enrolled, or approaching the MTD threshold.

6. Zoho Invoice

Free for up to 1,000 invoices per year with VAT support and a clean, professional interface. A step up from Wave in terms of polish and UK VAT handling, without the monthly fee.

Best for: sole traders wanting free professional invoicing above Wave's quality level, with VAT support included.

Weakness: no MTD compatibility, no CIS support, and no trades-specific features. Exceeding 1,000 invoices per year requires a paid plan.

Making Tax Digital: What Sole Traders Must Do From April 2026

Making Tax Digital for Income Tax Self Assessment (MTD ITSA) is being rolled out in stages:

• April 2026: sole traders with income over £50,000 must keep digital records and submit quarterly updates to HMRC
• April 2027: threshold drops to £30,000 annual income
• April 2028: threshold drops further to £20,000 annual income

Under MTD, instead of one Self Assessment return per year, you submit four quarterly updates plus one final declaration. Your software must either submit directly to HMRC or export data to bridging software that does.

MTD-compatible apps from this list: QuickBooks, Xero, FreshBooks. All three submit directly to HMRC.

A common setup for tradespeople is Sleepless Tradesman for day-to-day invoicing, quoting and job management — then QuickBooks, Xero or FreeAgent to handle the quarterly MTD submissions. Your accountant can usually handle the MTD submissions if you export records from your invoicing tool at the end of each quarter.

CIS Invoice Format: What to Include

If you are a CIS-registered subcontractor invoicing a contractor, your invoice must clearly show the CIS deduction. Here is the correct format:

The key rule: CIS deductions apply to labour only, not materials. Always separate them clearly on the invoice. The standard deduction rate for verified subcontractors is 20%; unverified subcontractors are deducted at 30%.

Our Verdict

• Tradesperson wanting invoicing + job management + leads: Sleepless Tradesman — free tier, purpose-built for trades, no subscription required to get started
• Need full accounting + MTD submissions: QuickBooks or Xero — both MTD-compatible, widely supported by UK accountants, and cover VAT returns alongside invoicing
• Want clean invoicing only, no subscription: Zoho Invoice (up to 1,000 invoices/year) or Wave (with limitations on MTD and CIS)
• Working with an accountant: match whatever software they use — QuickBooks and Xero are the most common accountant platforms in the UK, and using the same tool eliminates data re-entry

Frequently Asked Questions