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A Rent Increase Notice is an official communication from a landlord telling tenants about an upcoming rise in their rent. Under Belgian housing law, landlords must send this notice at least three months before applying any increase, giving tenants time to prepare or respond.

The notice must include the new rental amount, when it takes effect, and how the increase was calculated based on Belgium's health index (indexation). Landlords can only raise rent once per year, and the increase must follow strict calculation rules set by regional housing authorities in Brussels, Flanders, and Wallonia.

Use a Rent Increase Notice when you plan to adjust rent based on Belgium's health index calculations. As a landlord, you must send this notice exactly three months before the lease anniversary date - the timing is crucial for the increase to be legally valid. For example, if your tenant's lease started on September 1st, send the notice by June 1st for a September increase.

The notice becomes essential during periods of significant inflation, as Belgian law allows for annual rent adjustments to match cost-of-living changes. Many landlords time these notices to coincide with their annual property cost reviews, ensuring their rental income keeps pace with market conditions while staying within legal limits.

• Rent Increment Notice: The standard notice form for annual rent adjustments based on Belgium's health index. It includes mandatory sections for the current rent, calculation method, new amount, and effective date. The notice can be adapted for residential or commercial properties, with commercial versions typically including more detailed indexation calculations and specific lease reference clauses. Some landlords add optional sections for utility cost adjustments or building maintenance fee updates.

• Private Landlords: Most common users of Rent Increase Notices in Belgium, they must follow strict timing rules and calculation methods when issuing notices to their tenants.
• Property Management Companies: Handle rent increases for multiple properties, often using standardized notice templates that comply with regional housing regulations.
• Tenants: Primary recipients who have the right to verify the calculation accuracy and challenge improper increases within specific timeframes.
• Real Estate Agencies: Often assist landlords in preparing and sending notices, ensuring compliance with Belgian housing laws and proper indexation calculations.
• Housing Authorities: Monitor compliance and handle disputes related to rent increases across Belgium's regions.

• Original Lease Details: Gather the current rent amount, lease start date, and any previous indexation history.
• Health Index Calculation: Use Belgium's official health index calculator to determine the exact permitted increase amount.
• Timing Check: Confirm the lease anniversary date and count back three months for the notice deadline.
• Property Information: Include the complete property address and relevant lease reference numbers.
• Document Generation: Our platform automatically creates a legally compliant notice with all required elements, calculated increases, and proper formatting.
• Delivery Method: Prepare for registered mail delivery to ensure proper legal notification.

• Landlord Details: Full legal name and address of the property owner or authorized management company.
• Property Information: Complete address and description of the rental unit covered by the increase.
• Current Rent: Existing monthly rent amount and any included charges or utilities.
• New Rent Amount: Clearly stated increased rent figure calculated using the health index formula.
• Calculation Method: Detailed breakdown showing how the new amount was determined using official indices.
• Effective Date: Specific date when the increase takes effect, at least three months from notice delivery.
• Legal References: Citation of relevant Belgian housing law provisions supporting the increase.

A Rent Increase Notice differs significantly from a Notice to Pay in both purpose and timing. While both documents relate to rental payments, they serve distinct legal functions under Belgian housing law.

• Purpose: A Rent Increase Notice is a forward-looking document announcing a legal rent adjustment based on the health index, while a Notice to Pay addresses existing unpaid rent obligations.
• Timing Requirements: Rent increases require three months' advance notice and can only occur annually. A Notice to Pay is issued immediately when rent becomes overdue.
• Legal Implications: Rent increase notices modify existing lease terms through proper indexation. Payment notices are enforcement tools that can lead to legal proceedings if ignored.
• Required Content: Increase notices must include index calculations and future effective dates. Payment notices focus on outstanding amounts, payment deadlines, and potential consequences of non-payment.