Input Data

Report new Case Changes

Master data vs. variable data

Every case field has a time type that decides how a value you report behaves over time:

• Period - master data. Valid from a start date onward until you change it again - no end needed. Example: address, IBAN, civil status.
• Moment - variable data. Tied to a single point in time - start and end are the same date. Example: hours worked on a day, a one-off bonus.
• Timeless - practically never changes (e.g. a fixed configuration value).

This is a property of the field, not of the case - both examples below report through the same case (EmployeeNewEntryData), and you only need to send the field(s) that actually changed, not the full onboarding set again.

Moment values are summed within a payrun period. If you report a CHF 500 bonus on May 2 and a CHF 380 bonus on May 16, both fall inside the May payrun period, so the value used for that period's calculation is CHF 880 - not the last value reported, the total of everything reported.

_

Report a Period field - the employee moves house

_

Report a Moment field - a one-off bonus

The same pattern applies to CH.Swissdec.EmployeeActivityWorkedHours (hours worked on a day) - any Moment field, not just bonuses.

Migrating historical data

Moving off another payroll system? Historical data is reported through the exact same case changes described above - there's no separate import mode. Two things are specific to migrating rather than reporting as-it-happens:

• Entry date - set an employee's entry date to their original hire date, not the date you migrated them into Ason
• Retroactive calculation - a start date in the past is fine; Ason calculates retroactively as needed, but won't re-trigger declarations already sent to authorities for periods before your go-live date

---

Employee Case Fields

Reference list of all case fields used to report an Employee Case Change - the same fields used in the "Enter salary & employee data" step of the Quickstart.

Employee Master Data

Period fields - valid from a start date onward until changed again (e.g. address, bank details).

Variable data for employees

Moment fields - tied to a single point in time, e.g. hours worked or a one-off bonus. See Report new Case Changes for a worked example of both.