Start here
Search engines may land users directly on individual tool pages. This homepage explains the project and provides a clean navigation hub.
Trust note: rates are versioned and linked to source-backed JSON (GOV.UK) with a fetched date.
I'm self-employed
Estimate Income Tax + NIC (and optional student loan/pension) from annual profit.
I'm a landlord
Estimate additional Income Tax due from rental profit (optional other income for marginal band).
I need to choose software
Generate a must-have checklist and decide DIY vs accountant. No brand ranking.
Tools
Grouped by situation so you can find the right tool quickly.
Self-employed
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CalculatorIncome Tax + Class 4 NIC (optional: Class 2, student loan, pension). Transparent breakdown and shareable link.
Landlord
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CalculatorEstimate the additional Income Tax due from rental profit (optional other income for marginal rate). No sign-in.
Self Assessment
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Decision helperGenerate a must-have feature list and a DIY vs accountant guide. No brand ranking.