---
title: "Set up annual working-time modulation"
description: "Annualisation lets working hours flex above or below 35h depending on periods, respecting an annual average. Essential for seasonal businesses (tourism, food industry, retail). - **Reading time**6 min - **Level**Advanced - **Last updated**May 2026 - **Module**Time Management ## Step-by-step 1.…"
url: "https://illizeo.com/en/centre-aide/set-up-annual-working-time-modulation/"
updated: "2026-09-21"
category: Time Management
---

# Set up annual working-time modulation

Annualisation lets working hours flex above or below 35h depending on periods, respecting an annual average. Essential for seasonal businesses (tourism, food industry, retail).

- **Reading time**6 min
- **Level**Advanced
- **Last updated**May 2026
- **Module**Time Management

## Step-by-step

1. ### Check the collective agreement

   Annualisation requires a collective agreement. It sets the reference period, average duration, low/high bounds.
2. ### Configure the cycle

   4 to 12 months. Typical low bound: 0h, high bound: 48h weekly. Average: 35h over the period.
3. ### Enter the planned calendar

   Import the yearly calendar or let managers enter it team by team.
4. ### Track the counter

   The annualisation balance updates daily. Mid-period, check the gap to target.
5. ### Settle at period end

   If balance positive (hours owed): time off in lieu or overtime pay. If negative: settled by agreement or deducted per policy.

## Standard cycles

| Cycle | Best for |
| --- | --- |
| 4 months | Short seasons (summer only) |
| 6 months | Semestrial activity |
| 12 months | Multi-season (tourism + ski) |
| Rolling 52 weeks | Continuous with repeated peaks |

## FAQ

   Annualisation and overtime?

Within the high bound = no overtime. Above = overtime paid immediately.

   What if employee leaves mid-cycle?

The balance is settled on departure: overtime pay or deduction.

   Notice delay?

Often 7 working days per agreement. Illizeo enforces the delay and blocks late changes.

   What about onerous work?

Night or Sunday hours feed the onerous-work counter, separate from annualisation.

### See the FlexOffice module

Book desks and rooms with an interactive map.

[See all Modules](/en/centre-aide/?cat=modules)

### *Related*