Mortgage in Brussels

Introduction: financing a property purchase in Brussels

Acquiring a property in Brussels involves, in the vast majority of cases, taking out a mortgage. In 2026, in a context of stabilised interest rates following the rises of 2022–2023, financing conditions play a decisive role in the purchasing capacity of Brussels households and in property market dynamics.

This guide details the mechanics of mortgage finance in Belgium, with a focus on the specificities applicable to acquisitions in the Brussels-Capital Region: no regional tax benefit, registration duties of 12.5%, the Brussels abatement, and loan-to-value norms imposed by the National Bank.

Mortgage fundamentals

What is a mortgage?

A mortgage loan is a loan granted by a financial institution for the financing of real estate, secured by a mortgage registered against that property. In the event of default by the borrower, the bank may have the property seized and sold to recover its claim.

In Belgium, mortgage lending is governed by Book VII of the Code of Economic Law, which imposes pre-contractual information obligations, a duty of advice on the lender, and transparency requirements regarding rates and fees.

Types of interest rate

Fixed rate: the rate remains unchanged for the full duration of the loan. This is the most common arrangement in Belgium, chosen by approximately 70% of borrowers. In 2026, fixed rates range from 3.0% to 3.8% depending on the term.

Variable rate: the rate is revised periodically (annually, every 3 years, or every 5 years) in line with the movement of a reference index. Variable rates start lower (2.5% to 3.0% in 2026) but carry a risk of increase. Belgian law imposes a variation cap: the rate cannot more than double compared with the initial rate.

Semi-fixed (or mixed) rate: fixed for an initial period (5, 10, or 15 years) then variable. This arrangement offers a compromise between security and flexibility.

Loan term

The most common terms in Belgium are 20 and 25 years. Some banks offer terms of up to 30 years, but conditions are generally less favourable (higher rate, reduced loan-to-value). The term directly influences the monthly repayment and the total cost of the loan:

• 20 years at 3.2% for €300,000: monthly repayment of approximately €1,700, total interest of approximately €108,000.
• 25 years at 3.5% for €300,000: monthly repayment of approximately €1,500, total interest of approximately €150,000.

Extending the term reduces the monthly repayment but significantly increases the total cost of the loan. The right balance between an affordable monthly repayment and a controlled total cost must be found.

Lending conditions in 2026

Loan-to-value (LTV) ratio

The loan-to-value ratio is the relationship between the amount borrowed and the value of the property. National Bank of Belgium (NBB) rules strictly govern maximum LTV ratios:

• Primary residence: maximum LTV of 90% of the property value. A derogation margin of 35% of files may go up to 100% (or even higher for first-time buyers under 35, within a limit of 20% of files).
• Buy-to-let investment: maximum LTV of 80% of the property value, with derogations limited to 10% of files.

Practical implication for Brussels: with a median apartment price of €265,000 and acquisition costs of 12 to 15%, a buyer must have a personal deposit of at least €50,000 to €70,000 (down payment + fees). The Brussels abatement reduces this burden by up to €25,000 for eligible first-time buyers.

Debt-to-income ratio

Banks apply a maximum debt-to-income ratio of 35 to 40% of net monthly income (all loans combined). The NBB recommends a ceiling of 50%, but banking practice is more conservative.

Example: for a household with net income of €4,500/month and a maximum debt-to-income ratio of 40%, the maximum monthly repayment is €1,800. At a rate of 3.2% over 25 years, this allows borrowing of approximately €345,000.

Income taken into account

Banks consider:

• Net salaries (open-ended contracts, generally after the probationary period)
• Self-employment income (average of the last 3 years)
• Existing rental income (often weighted at 70–80% to account for vacancy and charges)
• Family allowances (depending on the bank)
• Replacement income (pension, invalidity benefit) subject to conditions

Income from fixed-term contracts, temporary work, or short-term contracts is rarely taken fully into account.

Costs associated with the mortgage

Mortgage registration fees

The mortgage must be registered at the mortgage registry, which incurs costs proportional to the amount borrowed:

• Mortgage registration duty: 1% of the amount borrowed.
• Notary’s fees for the mortgage deed.
• Various charges (transcription, copies, VAT on fees).

Example: for a loan of €250,000, mortgage registration costs amount to approximately €6,000 to €8,000.

Alternative: the mortgage mandate

The mortgage mandate is a less costly alternative to a full mortgage. The owner grants the bank a mandate to register a mortgage if necessary (in the event of default), but registration does not take place immediately. Costs are reduced by approximately 50%, but the mandate offers less security to the bank, which may translate into a slightly higher rate.

Bank arrangement fees

Most banks charge arrangement fees (€500 to €1,000), sometimes negotiable. Some banks offer packages including insurance and a current account, which can reduce these fees.

Release fee

If you sell your property before the mortgage matures, the bank will require a release (mainlevée) of the mortgage, costing approximately 0.5 to 1% of the original loan amount. This cost should be factored into any resale plans.

Mortgage protection insurance

Obligation and operation

Mortgage protection insurance (assurance solde restant dû) is not legally compulsory in Belgium, but is required by virtually all banks as a condition of granting the loan. It guarantees the total or partial repayment of the outstanding loan balance in the event of the insured’s death.

The cost of the insurance depends on the insured’s age, their state of health (mandatory medical questionnaire), the insured capital, and the term. Premiums are generally paid as a single premium or monthly.

Tax specificities in the Brussels-Capital Region

Unlike the Flemish and Walloon Regions, the Brussels-Capital Region no longer grants any tax benefit for mortgage protection insurance premiums on loans taken out since 2017. Premiums are therefore only deductible under the federal long-term savings arrangement (within the shared ceiling with pension savings and supplementary pension contributions), representing a limited benefit.

Supplementary cover

Beyond death cover, it is advisable to take out incapacity-to-work (or “disability”) cover, which covers the monthly repayments in the event of prolonged incapacity. The additional cost is generally modest and provides valuable security.

Mortgage tax treatment in the Brussels-Capital Region

Abolition of the housing bonus

Since 1 January 2017, the Brussels-Capital Region has abolished all regional tax benefits for mortgage loans (housing bonus, long-term savings). This decision was offset by an increase in the registration duty abatement (raised to €200,000).

Transitional regime: loans taken out before 1 January 2017 continue to benefit from the tax advantage applicable at the time of their conclusion (Brussels housing bonus or long-term savings), subject to the original conditions.

Comparison with other Belgian regions

This comparison shows that the choice of region of acquisition has a significant fiscal impact. For the same property, a Brussels buyer pays higher duties than in Flanders but benefits from the abatement. The absence of mortgage tax deductibility in Brussels increases the true cost of financing compared with the other two regions.

Residual federal deductibility

At federal level, mortgage interest on a loan for a property other than the owner’s own home (buy-to-let investment) remains deductible against property income, within certain limits. This partial deductibility can reduce the tax payable on the cadastral income of a rented property.

Property expertise and the mortgage

Why the bank requires an expertise

The bank lends an amount based on the value of the property — this is the basis for calculating the LTV ratio. It therefore needs a reliable assessment of that value. In the majority of cases, the bank requires a property expertise carried out by a certified expert, independent of both seller and buyer.

Situations where an expertise is almost invariably required:

• LTV ratio exceeding 80%
• Amount borrowed exceeding €300,000
• Atypical property (investment property, prestige property, property requiring renovation)
• Significant discrepancy between the purchase price and market benchmarks

What the expert assesses

The expert appointed for a mortgage valuation assesses:

• The fair market value of the property (current market value)
• The forced sale value (value in the event of forced sale, generally 70–80% of fair market value)
• The general condition of the property and the works anticipated
• Planning compliance
• The EPC rating and its impact on value

Our property expertise practice carries out mortgage valuations across the entire Brussels-Capital Region. Our reports are accepted by all major banking institutions. Contact us to find out more.

Steps in a mortgage application

1. Simulation and pre-qualification

Before even viewing properties, it is advisable to obtain a mortgage simulation from your bank or a broker. This simulation indicates your maximum borrowing capacity and the corresponding monthly repayment. Some banks issue a letter of agreement in principle (pre-qualification) that strengthens your position in negotiations.

2. Assembling the file

The application file comprises:

• Identity documents and proof of address
• Pay slips for the last 3 months and employment contract
• Tax assessment notices for the last 2 years
• Bank statements for the last 3 months
• Evidence of the personal deposit
• Signed sale agreement (compromis de vente)
• EPC certificate and property description

3. Analysis and decision

The bank analyses the file, commissions an expertise of the property if necessary, and gives its decision within 2 to 4 weeks on average. The decision takes the form of a credit offer detailing the amount, rate, term, conditions, and fees.

4. Credit offer and reflection period

The borrower has a mandatory reflection period of 14 days from receipt of the offer (European Mortgage Credit Directive). During this period, the offer cannot be modified and the borrower may compare it with other proposals.

5. Signing the mortgage deed

The mortgage deed (and the property purchase deed) is signed before a notary, generally at the same time as the purchase deed. Funds are released on this occasion.

Practical tips for optimising your mortgage

Compare offers

Rates and conditions vary significantly from one bank to another. It is advisable to approach at least 3 institutions or to use a mortgage broker who will compare offers on your behalf. A 0.3% difference on a €250,000 loan over 25 years represents an additional cost of over €10,000 over the life of the loan.

Negotiate the rate

The advertised rate is not always the best rate achievable. The margin for negotiation depends on your profile (income, stability, deposit), the amount borrowed, and the relationship with the bank. A strong application can obtain 0.1 to 0.3% better than the catalogue rate.

Optimise the LTV ratio

The lower the LTV ratio (i.e. the higher the deposit), the better the rate offered will be. If possible, aim for a ratio below 80% to access the best conditions. Each LTV band (< 60%, 60–80%, 80–90%, > 90%) corresponds to a different pricing grid.

Anticipate acquisition costs

In Brussels, acquisition costs (registration duties + notary’s fees) represent 12 to 15% of the purchase price (8–11% with the abatement). These costs are generally not financed by the mortgage loan (banks exclude them from the LTV calculation). They must therefore be covered by the personal deposit.

Consider early repayment

Early repayment of a mortgage loan incurs an early repayment charge capped at 3 months’ interest on the outstanding balance. This charge is lower than in many other European countries, which offers some flexibility in the event of a resale or refinancing.

Mortgage finance for energy renovation

Financing energy renovation is a growing issue in Brussels, where many properties carry an unfavourable EPC rating (E to G). Several financing options are available:

• Supplementary mortgage loan: secured against the existing property, it finances works at rates close to a standard property loan.
• Brussels green loan: the Brussels-Capital Region offers a preferential-rate loan (0 to 2%) for energy renovation works, subject to income conditions and a target energy performance level.
• Renolution grants: cumulative with bank financing, these grants cover part of the cost of insulation works, boiler replacement, and solar panel installation.

For a complete overview of support and grants, see our Brussels construction and renovation guide.

Summary

The mortgage is the primary financing tool for property acquisition in Brussels. In 2026, fixed rates range from 3.0% to 3.8%, LTV norms require a substantial deposit, and the absence of a regional tax benefit for new loans increases the true cost of acquisition compared with the other two Belgian regions. The Brussels abatement (maximum €25,000) partially offsets this burden.

Need an expertise for your mortgage application? Our practice is accredited by all major banks for mortgage valuations. Contact us for tailored support.