# Sole Sums: Self Assessment — UK self-employed tax 2026/27

> UK self-employed tax 2026/27 (iPhone/iPad app by DYLAN MARK POWELL.)

- Source: https://appshunter.io/ios/app/sole-sums-self-assessment/id6830608965 (this page in markdown: same URL + `.md`)
- Developer: [DYLAN MARK POWELL](https://appshunter.io/developer/6791094031)
- Category: Finance, Business
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.1 · 26 MB
- Languages: American English
- Released: 2026-11-12
- Data updated: 2026-11-13

## What is Sole Sums?

Sole Sums estimates your UK self assessment tax bill. It's for sole traders and the self-employed who want to know what they owe before 31 January.

Put in your income and expenses. Sole Sums estimates your income tax, Class 4 National Insurance and student loan repayments. Then it shows what to pay on 31 January 2027 and 31 July 2027.

WHAT IT WORKS OUT (FREE)
• Income tax for the 2025/26 and 2026/27 tax years
• Rates for England, Wales and Northern Ireland, and for Scotland
• Class 4 National Insurance, plus voluntary Class 2 if you choose
• Student loan: Plans 1, 2, 4 and 5, and the Postgraduate Loan
• A PAYE job alongside your self-employment
• The £1,000 trading allowance, if it suits you better than expenses
• Your 31 January 2027 bill: the 2025/26 balancing payment plus the first 2026/27 payment on account
• Your 31 July 2027 payment on account
• When payments on account don't apply (the £1,000 and 80% rules)
• How much of each pound to set aside for tax

KEEP ON TOP OF IT (FREE)
• Countdown to the 31 January deadline
• A ready-to-file checklist
• An income and expense log, using the expense categories from HMRC's self-employment pages (SA103). Up to 30 entries free.
• Mileage calculator: 55p a mile for the first 10,000 miles in 2026/27 (45p before 6 April 2026), then 25p. Motorcycles 24p.
• Use-of-home flat rate calculator: £10, £18 or £26 a month, based on the hours you work at home

SOLE SUMS PRO
A one-off purchase. No subscription.
• Unlimited income and expense entries
• Export your records as CSV
• Export your records and estimate summary as PDF
Restore Purchases is on the More tab (under Settings) and on the Pro screen.

PRIVATE BY DESIGN
• Works offline
• No account and no sign-in
• No bank link
• No ads and no analytics
• Your data is stored only on your device

WHAT IT DOESN'T DO
Sole Sums gives estimates, not tax advice. It doesn't file your tax return. You still file with HMRC yourself, or through an accountant or filing software.

It doesn't cover dividends, savings interest, property income, capital gains, pension tax relief or the High Income Child Benefit Charge. If any of these apply to you, your real bill will be different.

Sole Sums is not affiliated with, or endorsed by, HMRC or the UK government. Rates and thresholds come from GOV.UK and were checked on 3 November 2026:
https://www.gov.uk/income-tax-rates
https://www.gov.uk/self-employed-national-insurance-rates
https://www.gov.uk/understand-self-assessment-bill/payments-on-account

Privacy: https://solesums.impactlayer.workers.dev/privacy.html
Terms: https://solesums.impactlayer.workers.dev/terms.html
Support: https://solesums.impactlayer.workers.dev/support.html

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Sole Sums Pro | $4.99 | one-time |


## Is Sole Sums safe?

Not enough ratings yet to assess Sole Sums.

## Is Sole Sums legit?

Sole Sums: Self Assessment has limited verification signals. The AppsHunter Legitimacy Score for Sole Sums is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0.0 — 2026-11-13

No release notes.

## More apps by DYLAN MARK POWELL

- [Dragon Players](https://appshunter.io/ios/app/dragon-players/id6791094029)
- [GPT Chat: AI Builders Hub](https://appshunter.io/ios/app/gpt-chat-ai-builders-hub/id6830608693)

All apps by DYLAN MARK POWELL: https://appshunter.io/developer/6791094031

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-13.*