Yes, you can run a UK trade or sole trader business on invoicing software alone, without an accountant, as long as you keep complete records and know the few deadlines HMRC actually sets. An accountant does not file anything you could not file yourself; what you give up is their review of your numbers and their handling of anything unusual.
- Nothing legally requires a UK sole trader to hire an accountant.
- Software can produce invoices, records and the figures a tax return needs.
- MTD for Income Tax from April 2026 pushes £50k+ earners onto digital records.
- An accountant earns their fee on tricky cases: VAT, CIS, property income.
- Start self-managed, and hand over records when it gets complex.
Can I use invoicing software without hiring an accountant?
There is no rule that says a sole trader or limited company must appoint an accountant. The legal requirements are about the records and the returns, not who produces them:
| Your obligation | What it actually needs | Can software do it? |
|---|---|---|
| Keep business records | Invoices, receipts, bank statements, kept long enough for HMRC | Yes, invoicing software holds the invoice half |
| File a self-assessment return | Total income, expenses, tax paid | You enter the totals yourself from your records |
| Pay tax and NIC on time | Know the 31 January payment deadline | Calendar and reminders handle it |
| Register for VAT at £90,000 turnover | Monitor your rolling 12-month total | Trackable in good invoicing software |
| Companies: file accounts and confirmation statement | Takes more form-filling than a sole trader | Partly: most companies still use an accountant here |
For a straightforward sole trader (one income stream, no employees, below the VAT threshold) invoicing software plus HMRC’s own online filing covers the whole obligation. The accountant’s fee buys convenience and a second pair of eyes, not compliance.
What software handles well without an accountant
The invoicing half is exactly what software does best, and it is where most small businesses lose money without noticing:
- Invoices that are legally valid. UK invoices for VAT-registered businesses need specific fields: see the required fields and worked examples before your first invoice.
- Payment tracking. You know who owes what without a spreadsheet.
- Chasing. Sendinvo sends payment reminders automatically, which is the job most people actually want an accountant’s admin help with.
- Year-end totals. A clean list of invoices issued and paid gives you, or an accountant you hire later, the turnover figure in minutes.
What you still have to do yourself
The software does not remove the filing duty: it removes the paperwork around it:
- File your own self-assessment. Register with HMRC, keep your UTR, and file online by 31 January each year.
- Add up your expenses. Software records invoices out; you record receipts, mileage and purchases in and label them properly.
- Watch the thresholds. The £90,000 VAT registration threshold and, from April 2026, Making Tax Digital for Income Tax for self-employed people and landlords with qualifying income over £50,000: that brings digital records and quarterly updates, so your invoicing records need to be digital and exportable.
- Keep the evidence. HMRC can ask for supporting records; retention runs for years after the tax year in question.
MTD for Income Tax is the real change: once it applies to you, invoices and records held in software stop being a convenience and become the compliance mechanism.
When an accountant earns their fee
Some situations pay for professional help many times over:
- CIS subcontractors with mixed income. Deductions, materials and year-end reconciliation get fiddly fast: the CIS record-keeping is simple to set up in software, but reviewing the reclaim is worth a second opinion.
- You cross the VAT threshold. Registration, scheme choice and reverse-charge treatment are decisions with lasting consequences.
- You run a limited company. Corporation tax, payroll, dividends and statutory filings stack up.
- You have several income streams, especially property or overseas work.
A middle path most trades use: run everything in software yourself for the routine work, and pay an accountant for a one-off year-end review or the complicated questions. That costs a fraction of full-service bookkeeping.
What it costs either way
Accountancy fees for a simple sole trader return typically run from a few hundred pounds a year, rising with complexity, software for invoicing runs cheaper per month than a single hour of an accountant’s time. The comparison is not really price against price; it is whether your records are clean enough that the year-end takes an evening. Software makes them clean by construction: every invoice is dated, numbered and stored when you send it.
Related questions
Can HMRC tell if I do not file my self-assessment?
Yes. If you are registered, non-filing triggers escalating penalties automatically: an initial fixed penalty, then daily penalties, then percentage-based ones. Missing registration is also penalised when found. The deadlines are public and strict; software cannot file the return for you, but it makes sure you never lose the records you would need.
Is invoicing software enough for a limited company?
Not entirely. A company needs statutory accounts, corporation tax returns and confirmation statements, which is specialised filing. Invoicing software still handles the customer-facing half perfectly well, most limited-company trades use both: software for invoices, an accountant for the filings.
Do I need an accountant to start a business?
No. A sole trader registers as self-employed with HMRC directly and can trade the same day. A limited company can be formed online without professional help. The choice to involve an accountant is about confidence and complexity, not permission.
FAQ
Can I use invoicing software without hiring an accountant?
Yes. Nothing in UK law requires a sole trader to hire an accountant. Invoicing software produces the invoices, records and totals you need to file your own self-assessment, as long as you keep complete expense records too.
What does Making Tax Digital mean for sole traders?
From April 2026, self-employed people and landlords with qualifying income over £50,000 must keep digital records and submit quarterly updates through compatible software, with lower thresholds phasing in afterwards. Good invoicing records are the foundation.
How much does an accountant cost a sole trader?
A straightforward sole trader self-assessment typically costs from around £150 to £500 a year depending on complexity, while invoicing software costs a fraction of that monthly. Complex cases (VAT, CIS, companies) cost more and justify the fee.
What records must a sole trader keep?
Invoices issued, sales and business expenses, and any other records supporting the figures in your return. Keep them long enough to cover HMRC’s enquiry window, in practice most keep at least five years after the relevant deadline.
Can I switch from doing it myself to an accountant later?
Yes, at any time. An accountant can pick up clean invoicing records mid-year. Which is exactly why keeping them organised in software from day one saves fees later.
Does invoicing software replace bookkeeping?
No. It replaces manual invoicing and tracks money owed to you. You still record purchases, receipts and expenses (the buying half of the business) though the best invoicing tools export everything your records need.
One last thing
The honest answer depends less on law than on arithmetic: if your year-end numbers take more than an evening to assemble, an accountant’s fee is cheaper than your own time. If your business is one trade, one income and clean invoices, invoicing software plus one filing deadline a year does the job.