Hi,

This is expected in Odoo Payroll: the values you put in the Contract › Salary Structure › Advantages / Other Inputs are stored permanently in the contract, so they are reused each time you generate a payslip batch. That’s why they keep showing in August.

If those amounts are variable (like overtime, bonuses, commissions…), the best practice is not to keep them in the contract. Instead:

1. Go to Payroll › Configuration › Salary Structure › Input Types and create input types for those variables (e.g. “Bonus,” “Overtime”).
2. When you create the August payslip batch, Odoo will generate payslips with empty input lines. You can then fill only the amounts for that specific month.
3. This way, inputs reset automatically each period, and you don’t need to edit contracts again.

So in short: fixed values → keep them in the contract; variable values → use Input Types.

Hope this helps.