Observed arrival · 2026-08-30
Fullworkings: UK calculators that show their working
A set of four UK tax and finance calculators covering take-home pay, student loans, child benefit charges, and CIS deductions.
Field notes
Fullworkings organizes four calculators around UK pay, family charges, and construction deductions, with the page labeling the current tools for 2026–27. Its distinguishing mechanism is a source trail: figures come from dated files, retain the relevant gov.uk page, specify their applicability window, and record when a person last checked them. The construction tool also separates CIS deductions from materials. Two further tools—Section 24 property relief and salary sacrifice comparison—are marked as in progress.
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Editorial observations of this landing page, not a rating.
One card from the complete issue