For · UK Sole Traders

An invoice app for UK sole traders.

Tradespeople, consultants, freelancers, contractors - if HMRC sees you as a sole trader and your customers see you as a one-person business, VioBusiness is built for you. UK-made. VAT-aware. Compatible with Self Assessment and MTD bridging software. £15.99 once.

Made for the realities of UK sole-trader life. Send a clean VAT or non-VAT invoice in three taps. Log expenses with receipt photos. Convert quotes to invoices. Year-end CSV that your accountant can drop straight into Self Assessment workings.

i.What sole traders actually need

You're a one-person business. You don't need accounting software designed for a 10-person agency. You need:

To send a professional invoice in under a minute
To capture receipts before you lose them
To know how much VAT (if any) you've collected and paid
To hand over clean records at year-end
To work whether you're at home, on a job site, or on a train

VioBusiness gives you all five. Without a £200-£500/year subscription.

ii.VAT-registered or not - it doesn't matter

Most UK sole traders start below the £90,000 VAT threshold and aren't registered. Some register voluntarily; others wait until they have to. Either way:

Not registered for VAT: Leave VAT at 0% on each invoice. The invoice prints cleanly with a clean total.
Registered for VAT: Set your VAT registration number in Business Profile. Set 20% (or 5%, or 0% for zero-rated) per invoice. The VAT line itemises automatically.
Reverse charge sales (services to overseas businesses, construction CIS): set 0% on the invoice and add the reverse charge note in the notes field. See our CIS guide and VAT guide.

iii.Self Assessment-ready records

HMRC requires sole traders to keep records of:

All business income
All business expenses with evidence
Receipts for items claimed as deductions
For at least 5 years after the 31 January submission deadline

VioBusiness stores invoices and expenses in a local database on your phone. Receipt photos attached to expenses give you the evidence HMRC expects. CSV export at year-end gives you (or your accountant) everything needed for the Self Assessment SA103.

iv.Pricing

£15.99 one-time, lifetime Pro

Unlimited invoices, quotes, contracts, expenses, customers. All future feature updates.

£2.49 /mo - Cloud backup (optional)

Encrypted backup stored in UK infrastructure. Sync between iPhone and iPad. Cancel anytime.

Free forever

5 invoices, 5 quotes, 10 expenses per month. 50 customers total. No signup.

v.UK-made, UK-friendly

VioBusiness is built by Vioscale Technologies Ltd, a UK company (Companies House № 14751646). Your data lives on your phone by default; if you opt into Cloud backup, it's stored in our UK infrastructure. GDPR compliance is the default, not an afterthought.

vi.Frequently asked

Is this MTD-compatible?

MTD is a submission process, not an invoice requirement. VioBusiness produces digital records that count toward MTD's "digital records" requirement. For VAT return submission, export CSV from VioBusiness and import into MTD bridging software like 123 Sheets, Vital Tax, or QuickFile bridging.

Does it work for CIS (construction) trades?

Yes. You can split labour and materials on invoices and add a CIS deduction line. See our CIS guide.

Can I bill EU clients in EUR?

Yes - and EU clients (B2B) typically reverse-charge the VAT, so you'd invoice at 0% VAT with the reverse charge note. See our VAT guide.

vii.Try it

Download on theApp Store Get it onGoogle Play

More UK content: UK overview · VAT guide · CIS guide · For small business