Indice de la Construction en Assurance (Indice FFB) : Understanding Its Impact

In summary

The construction index is a key element in the field of home insurance and ten-year guarantee. It allows for adjusting premiums and reevaluating compensations based on the evolution of building costs. This article explains how this essential index works and why it directly influences the price of your insurance.

📌 What Is the Construction Index?

The construction index is an economic indicator used to measure the evolution of construction costs and buildings. It plays a fundamental role in several areas, including home insurance, ten-year insurance, and rent indexation.

Insurance companies rely on this index to reevaluate insurance premiums and adjust compensation amounts in case of a claim. Likewise, building professionals and project owners use it to anticipate cost developments and adjust their budgets accordingly.

🏗️ Main Construction Indices

Several construction indices exist, each with a specific use in the insurance and real estate sectors.

Each of these indices allows contract adaptation and helps avoid a mismatch between the insured amount and the actual economic costs of construction.

🔍 Why Do We Use This Index?

The cost evolution in the construction sector directly impacts insurance, construction contracts, and property values.

🏗️ A Tool to Anticipate Inflation

The costs of construction materials, wages, and administrative expenses change every year based on several factors:

• 📈 Inflation, leading to a general increase in prices
• 🏗️ Material shortages (concrete, steel, wood, etc.) driving costs up
• 💰 Wage increases in the construction sector
• 🏠 Taxes and administrative fees related to construction

By using the construction index, insurers and construction companies can adjust their rates to prevent financial losses.

📊 Protection for Policyholders and Builders

The home and ten-year insurance is directly linked to the FFB index. In case of a claim, compensation must cover the actual reconstruction cost of the property. If material and labor prices increase, a contract without indexation may become insufficient, leaving the policyholder with less compensation than the real repair costs.

Example :
👉 A fire destroys a house in 2023. The FFB index was 1160.8 in 2023 and rises to 1171.8 in 2024. If the insurance is not indexed, the compensation will be based on the old cost, which may lead to a financial loss for the insured.

Thus, updating contracts via the construction index helps ensure effective protection against cost escalation.

🏗️ A Reference for Construction Contracts

The BT01 Index, used for construction contracts, is an essential tool for construction companies and individuals building a property. It helps avoid losses associated with rising project costs.

Example :
👉 A real estate developer signs a contract in 2022 with a builder for €500,000. In 2023, the BT01 index increases by 5%, meaning the actual project cost becomes €525,000. Without indexation, the builder might incur a loss or be forced to increase their price mid-project.

The BT01 Index thus allows automatic price adjustments to keep all parties protected from market fluctuations.

📈 The FFB Index: Insurance Reference

The FFB Index (French Building Federation) is a quarterly index that allows automatic adjustment of home and ten-year insurance premiums. It is used to evaluate the evolution of construction costs in France, based on a typical building in Paris. Unlike other indices, it does not include land value, but considers materials, labor, and related expenses.

Thanks to this reference index, insurers can adjust coverage and premiums to prevent a gap between the actual reconstruction cost and the insured amounts.

🏠 Impact on Home Insurance

The FFB Index plays a crucial role in calculating home insurance premiums. It helps track how construction costs evolve and prevents underestimation of property values in case of damage.

📊 How Does the FFB Index Influence Your Premium?

Home insurance is directly linked to this index, meaning:
✅ If the FFB index increases, your insurance premium increases as well.
✅ If the FFB index decreases, a reduction in premiums could be applied (though rare).

📌 Example of Premium Reevaluation

Let’s consider a contract signed in 2023 with an annual premium of €320.
If the FFB index moves from 1160.8 in 2023 to 1171.8 in 2024, the premium is adjusted as follows:

📊 €320 x (1171.8 / 1160.8) = €323.03

💡 Result : The insured must pay a premium of €323.03 in 2024, representing a slight increase due to the index rise.

🏚️ Impact in Case of Claim

The FFB Index also influences compensation values in case of damage.
If damage occurs, the insurer bases the calculation of the actual repair costs on this index.

👉 A claim in 2024 will result in higher compensation than in 2023, because the FFB index has increased and reconstruction costs have risen.

🏗️ Impact on the Ten-Year Guarantee

The ten-year insurance, mandatory for construction professionals, is also indexed to the FFB index. This warranty protects against serious defects and flaws that could compromise the structural integrity of a building or make it unsuitable for use.

📊 Reevaluation of Ten-Year Insurance Premiums

The increase in the FFB index leads to a rise in ten-year premiums.

📌 Observed increase: In 2022, the FFB index rose by +6.8%. This directly caused an increase in ten-year insurance premiums for construction companies.

📌 Example of an Increase in a Ten-Year Policy

Imagine a construction company took out a ten-year insurance policy in 2023 with a premium of €2,500.

If the FFB index moves from 1160.8 to 1171.8, the new premium is recalculated as:
📊 €2,500 x (1171.8 / 1160.8) = €2,525.86

💡 Consequence : The premium increases by €25.86 due to the rise in the FFB index.

📌 Why Does the Rise in the FFB Index Affect Insurances?

📈 A Necessary Reevaluation

The evolution of the FFB index is directly related to the construction costs. If costs increase, insurers must adapt their contracts to prevent insufficient reimbursements in case of damages.

💡 Without this reevaluation, a claim in 2024 might be compensated based on 2023 prices, which would not fully cover reconstruction costs.

🏗️ An Indicator of Inflation in Construction

The increase in the FFB index is often caused by:
✅ General inflation (rise in raw material prices)
✅ Material shortages (concrete, wood, steel)
✅ The rise in labor costs

By considering these economic factors, insurers can adjust premiums and ensure optimal protection for policyholders and construction companies.

🔍 The BT01 Index: Contract Reevaluation

The BT01 index, published monthly by the INSEE, is an economic indicator that allows adjusting construction contracts based on the evolution of building costs. It is particularly useful for contractors and project owners to anticipate inflation and revise project prices in real time.

Unlike the FFB index, which is quarterly and mainly used for home and ten-year insurance, the BT01 index is monthly and adapts more quickly to economic fluctuations.

🏠 Difference Between the FFB and BT01 Indices

Although the FFB and BT01 indices are both major references in the construction sector, they do not serve the same function.

👉 Why this difference?
✅ The BT01 index is often more responsive because it reflects monthly changes in material costs and labor.
✅ The FFB index, on the other hand, provides a more long-term view, making it better suited for insurance contracts.

📌 Example of Increase on a Construction Contract

The BT01 index is often used in construction contracts to reevaluate the payment amounts over time.

👉 Concrete example :
A construction company signs a contract in January 2023 for an initial amount of €200,000.

If the BT01 index moves from 125.4 in January 2023 to 132.2 in January 2024, the new contract amount will be:

📊 €200,000 x (132.2 / 125.4) = €210,856

💡 Consequence : The client will need to pay €10,856 more to cover rising construction costs.

📌 Example of an Increase in a Ten-Year Contract

The ten-year insurance is also affected by index evolutions.

👉 A construction company took out a ten-year insurance policy in 2023 with a €2,500 premium, when the FFB index was 1160.8.
In 2024, the FFB index reaches 1171.8.

📊 €2,500 x (1171.8 / 1160.8) = €2,525.86

💡 Consequence : The premium automatically increases by €25.86 to follow the cost evolution.

📈 Why Track the BT01 Index?

The BT01 index is an essential tool for contractors and real estate investors, because it allows to:
✅ Anticipate inflation in construction costs
✅ Negotiate indexed contracts to prevent financial losses
✅ Adjust project budgets

💡 Tip: To avoid surprises, it is recommended to include an indexation clause based on the BT01 index in all construction contracts.

🛠️ How Is the Construction Index Calculated?

The construction index, whether FFB or BT01, relies on several economic factors related to cost evolution in the construction sector. These indices help to adjust home and ten-year insurances as well as construction contracts depending on material and overhead price fluctuations.

📊 Elements Considered in the Index Calculation

The FFB and BT01 indices are based on several essential criteria:

📌 Note : The land price is not included in these indices calculation as it varies by location and has no direct impact on construction costs.

📈 Calculation Based on Actual Building Costs

The FFB and BT01 indices are regularly updated based on market data.

Calculation process :
✅ Building companies declare their costs: material prices, wages, and charges are analyzed.
✅ Variations are studied: surges or drops are considered each quarter (FFB) or month (BT01).
✅ The index is published: by the French Building Federation (FFB) or the INSEE for BT01.

📌 Examples of Criteria Impact on the Index

👉 Increase in steel and concrete costs → 📈 Rise in BT01 and FFB indices
👉 Labor shortages in construction → 📈 Higher wages, index increases
👉 Tax hikes on building permits → 📈 Impact on the index

💡 Why Track the Index?’

Monitoring the construction index allows:
✅ Anticipating increases in home and ten-year insurance premiums
✅ Adjusting budgets for projects and construction
✅ Preventing financial surprises on indexed contracts

💡 Advice: Insurers and construction companies should monitor these indices to adjust their rates and plan future costs. 🚀

📜 Can You Cancel an Insurance Contract Due to the FFB Index?

The FFB index is often used by insurers to reevaluate home and ten-year insurance premiums. However, if your premium increase exceeds the index evolution, you can contest the increase and request cancellation for tariff hike.

📌 Conditions for Cancellation

To cancel your insurance contract, certain conditions must be met:

✅ Premium increase must be higher than the index rise 📈
👉 If the FFB index rises by 5%, but your insurance premium increases by 8%, you can contest this increase.

✅ Send a request within 15 to 30 days of receiving the premium call 📬
👉 You must act quickly upon being informed of the increase.

✅ Make the request by registered mail with acknowledgment of receipt 📩
👉 This ensures a legal proof of your request with the insurer.

💡 Tip: Before canceling, compare offers to find a cheaper insurance with similar coverage.

📊 Example of Cancellation Based on the Index

Consider the example of the BT01 index, which evolves regularly:

👉 Variation of the BT01 index:
📈 +7.8% increase

✅ If your insurance premium increased by +7.8%, the insurer is within their rights.
❌ If your premium increased by +10% or more, you can request cancellation due to excessive increase.

📌 How to Write a Cancellation Letter?

✉️ Sample letter to send by registered mail

[Name & Surname]
[Full address]
[Postal code, City]
[Email & phone]
📅 [Date]

📍 Subject: Cancellation of my insurance contract due to tariff increase

Dear Sir or Madam,

I am the holder of the insurance contract [Contract reference] contracted with your company.

I have noticed an increase in my insurance premium for the year [Year] by [X] %, while the reference index FFB (or BT01) only increased by [X] %.

In accordance with Articles L.113-4 and L.121-10 of the Insurance Code, I inform you of my decision to cancel my contract for unjustified tariff increase.

I kindly ask you to consider my request and confirm the effective termination of my contract within 30 days.

I look forward to your response. Sincerely,

[Signature]

💡 Advice: Remember to attach a copy of your latest statement of due showing the premium increase.

🏠 What Alternatives After Cancellation?

Once your contract is canceled, you need to find new insurance quickly. Here are some steps to follow:

✅ Compare offers 💰 – Use an insurance comparator to get a better price.
✅ Check coverage 🔍 – Make sure the proposed guarantees match your needs.
✅ Subscribe to new insurance before the effective cancellation 📝 – You must avoid coverage gaps, especially in home and ten-year insurance.

💡 Good to know: Some insurance companies agree to handle the cancellation of your old contract if you subscribe with them.

🏁 Conclusion

The construction index is a key element in home and ten-year insurance, allowing premium adjustments based on actual building costs. Several indices, including FFB and BT01, influence insurance and construction contracts.

💡 Advice: Check the evolution of the FFB index each year and compare insurance offers to avoid overpaying! 🚀

For further information