About Clarpilot
Clarpilot helps sole traders, landlords and small businesses get through new tax rules calmly: are you affected, when, what to do — and which software really fits.
Why we built it
Official guidance is accurate but rarely tells you what to choose. Provider blogs recommend their own product. Many comparison sites are out of date or rank whoever pays. We wanted one place that does the checking for you, with every fact linked to its source and dated — and tools that give you a personal answer, not a generic article.
What you will find here
MTD threshold checker
Your start date, a dated plan for your calendar and the HMRC-recognised software that handles your income.
Self-employed tax calculator 2026/27
Income Tax, Class 4 National Insurance, payments on account and how much to put aside each month.
Every HMRC-recognised product compared
The full official list with filters: free version, final return, landlords, salary, dividends, VAT.
Dates, thresholds and penalties
Quarterly deadlines, penalty points, late payment rules and exemptions.
Guides
Free MTD software, MTD for landlords and sole traders, bridging software, product comparisons.
How we work
- Rules come from GOV.UK and are re-checked regularly; each page links to its sources.
- Software data comes from HMRC's official software finder and from providers' own websites — never from other comparison sites.
- Every page shows when its information was last checked.
- Our tools run in your browser: your answers are not sent to us.
- We never publish made-up reviews or star ratings.
Independence
Some links are affiliate links: if you sign up, the provider may pay us. This never changes the order of our tables, the answers of our tools or the data we show. Products with no affiliate programme are listed exactly like the others.
The deadlines we follow
- United Kingdom — Making Tax Digital for Income Tax: sole traders and landlords with qualifying income over £30,000 from 6 April 2027, over £20,000 from 6 April 2028 (over £50,000 since April 2026).
- Germany — e-invoicing: every business must be able to receive e-invoices since 1 January 2025; issuing becomes mandatory from 1 January 2027 above €800,000 of turnover and from 1 January 2028 for everyone else (small businesses under § 19 UStG excepted).
- France — e-invoicing: every business must be able to receive e-invoices since 1 September 2026; SMEs, very small businesses and micro-entrepreneurs must issue them and send e-reporting data from 1 September 2027.
We focus on the people these deadlines hit hardest: the self-employed and small businesses who have to change how they work, without a finance department to do it for them.
Who is behind Clarpilot
Clarpilot is built by a small independent team that makes data-driven comparison tools in several countries. The company that publishes the site is named in our legal notice. We are not a software provider, a bank or an accountancy firm. Legal notice.
Clarpilot in other countries
Questions, corrections or partnership requests: contact@clarpilot.com