To add a formula-based percentage to an employee's pension, you will first need to set the percentage. Follow the below steps to achieve this.

1. Go to Parameters > Pension schemes as shown here.

2. Tick the Formula Based box highlighted below.

3. You can now add percentage amounts to the Employee Portion and Employer Portion sections as shown here. Click OK to save.

Once the percentage is set, you will need to apply it to the relevant employee. Right-click on the employee and select the Pensions tab.

Note: If the employee is not set for a pension, you will need to fill in the details on the left first.

Tick the box beside Formula (Percentage) Based and select Default for the Formula Percentage as shown below.

Once done, click Apply and OK. Repeat the steps with all relevant employees.