Plug in a monthly amount and your tax band. The figure on the right is what comes off your take-home pay after relief — the relief is automatic and lands in the same payslip.
National Insurance is not affected by Payroll Giving deductions.
Worked figures. National Insurance is calculated on the original gross pay and is unaffected by Payroll Giving deductions. For the full mechanics, see Payroll Giving tax relief in the UK.
Drop this iframe anywhere — internal SharePoint, intranet, charity microsite, an HR comms email. No tracking, no permission required. The only ask: keep the small "by workplacegiving.co.uk" attribution.
<iframe
src="https://workplacegiving.co.uk/embed/payroll-giving-calculator/"
width="100%"
height="640"
style="border: 1px solid #d8d2c5; max-width: 760px;"
loading="lazy"
title="Payroll Giving cost calculator — Workplace Giving"
></iframe>
Renders at 760px max width. Adjust height if your container affects layout. Works without cookies, JavaScript-only computation, no external requests beyond Google Fonts.