Your subscription invoice is designed to stay stable month over month. If it has changed, it is almost always because one of these has happened:
Salary change: always effective from the 1st of the next month.
Night differential: where a country sets a statutory night rate, the premium for an employee's fixed night hours appears on the subscription invoice as its own line. This applies to invoices raised from 1 September 2026 and restores how it was billed before the May 2026 billing migration.
A work schedule change: night differential is calculated from the employee's fixed hours, so changing those hours, or moving them on or off fixed hours, changes the amount from the next invoice.
Equipment added or removed.
Plan change: upgrade, downgrade, or add-on change.
Statutory rate change: for example, a government-mandated change to social security contribution rates.
Health insurance dependents added or removed, or a health insurance subscription updated to reflect the actual premium for the employee's age band.
A new hire: your first month for a new employee may include a Pro-rata Invoice covering the partial first month, before steady-state subscription billing begins.
If your subscription invoice has changed and none of these apply, please contact your dedicated HR Manager. We want to make sure everything is correct.