BIK Proration Calculator

BIK Proration Calculator

Works out the monthly Benefit-in-Kind figure to report to payroll for a joiner or leaver mid-way through the group's policy year. Nothing is stored — refresh to reset.

Policy year
26/03/2026 – 25/03/2027

From employee's start date to the policy year end date — not a full annual figure

£

Employee's actual cover start date

Fill in the premium and start date to see the payroll schedule.

Provider rate reviews

Providers typically review base rates roughly twice a year. Make sure the premium is the figure quoted for this specific member and period.

Invoice check

This tool shows what should be charged. If the provider disagrees, the most likely cause is a stale rate, not a proration error.