In short
A mortgage (hypothèque / hypotheek) is a right over a building that guarantees the bank payment of a debt. A mortgage mandate (mandat hypothécaire / hypothecair mandaat) is an authorisation given to the bank to take that mortgage later, if it considers it necessary: it is “not yet a mortgage” (notaire.be). A mortgage costs duties of 1% (registration) and 0.30% (mortgage) on the capital and the ancillary amounts. The mandate avoids these duties at signing, but gives less security to the bank. If the bank uses it, you also pay the costs of the mortgage.
The mortgage
Notaire.be defines it as follows: “A mortgage is a right over a building that guarantees the creditor payment of a debt.” If you do not repay, the creditor can seize the property, have it sold and be paid first.
It is created by notarial deed, a contract between the creditor and you. The notary checks ownership and the absence of other mortgages, drafts the deed, pays the duties and arranges the registration.
What the mortgage covers
Beyond the capital, the mortgage guarantees ancillary amounts: fire or life insurance premiums advanced by the bank, enforcement and procedural costs, and an early repayment penalty. They are generally estimated at 10% of the capital borrowed.
There is also the all-sums mortgage (hypothèque pour toute somme), which covers other loans with the same bank (personal loan, car loan, overdraft, credit line). These debts must be determined or determinable in the deed. Advantages cited by notaire.be: reusing the security with the same bank, a sometimes more favourable rate, no costs of a new deed. Risk: the property secures all the debts with the bank, even those unrelated to the home. The home can be lost because of a default on another loan, even if the mortgage loan is being repaid properly.
Duration
The registration lasts 30 years, whatever the term of the loan, and then expires. Repayment does not erase it: a release (mainlevée, a notarial deed) is needed, especially in the event of a sale or a new mortgage.
The mortgage mandate
With a mandate, you authorise the bank to register a mortgage when it considers it necessary. It may never do so. The mandate must also be made by notarial deed (acte authentique), so before a notary.
Notaire.be specifies that the mandate “is therefore not yet a mortgage strictly speaking”. The bank only grants it to clients it trusts: it finds “less security” in it because, when it wants to register the mortgage, “it may already be too late”.
Costs, side by side
| Item | Mortgage | Mortgage mandate |
|---|---|---|
| Registration duty | 1% of the amount secured | no proportional duty; €50 registration duty |
| Mortgage duty | 0.30% of the capital and ancillary amounts | none |
| Mortgage registry fee | flat fee of €230 or €985 depending on the value | not mentioned |
| Notary’s fee | statutory fee for the deed | one quarter of the fee for the mortgage deed |
| Searches and drafting | administrative costs | €50 + VAT |
| If the bank uses the mandate | you also pay the costs of the mortgage deed |
Sources: notaire.be (pages on the mortgage, on mortgage loan costs and the November 2020 article). The pages do not describe every item in the same way: ask your notary for the statement of your file.
Worked example
Payotte’s calculation with the notaire.be rates, for a €200,000 loan:
- base = €200,000 + 10% ancillary amounts = €220,000;
- 1% registration duty = €2,200;
- 0.30% mortgage duty = €660;
- i.e. €2,860 in duties, before the registry fee (€230 or €985), the notary’s fee and the administrative costs.
With a mandate, these €2,860 in duties are not due at signing: you pay €50 in registration duty, €50 + VAT for searches and one quarter of the fee. If the bank then registers the mortgage, you bear its costs.
To estimate your purchase costs, use our tool to calculate your purchase costs. Notaire.be also offers a calculator for the deed costs of a mortgage mandate.
Why the bank prefers the mortgage
The mortgage gives the bank an immediate, registered right over the property. With the mandate, it depends on being able to register it later. It therefore grants the mandate to clients it trusts. Ask your bank before signing the sale agreement (see the guide on the sale agreement).
What to do in practice
- Ask your bank whether it offers a mandate or requires a mortgage.
- Ask the notary for the cost of each option, including the cost of a later registration if the bank uses the mandate.
- Check whether the mortgage is an “all-sums” mortgage and which debts it covers.
- Remember the release when you sell or refinance (see the guide refinancing a mortgage).
What it costs
For a €200,000 loan, the duties for a mortgage amount to €2,860 (excluding the registry fee, fees and costs), against €50 in duties and €50 + VAT for searches for a mandate, plus one quarter of the fee. For the other purchase costs, see the guide on the notary, fees and role and on registration duties. To find out how much you can borrow, see your borrowing capacity.
Which professional to consult
The notary handling your file drafts the deed, calculates the duties and arranges the registration. Your bank tells you whether it requires a mortgage or accepts a mandate. A credit broker can compare what several banks require (see mortgage broker).
Frequently asked questions
Is a mortgage mandate free?
No. It costs €50 in registration duty, €50 + VAT for searches and one quarter of the notary’s fee for the mortgage deed (notaire.be).
Can the bank use the mandate later?
Yes, when it considers it necessary. You then also pay the costs of the mortgage deed.
Does the mortgage disappear when I have finished repaying?
No, a release by notarial deed is needed (notaire.be). The registration expires in any case after 30 years.
What is an all-sums mortgage?
A mortgage that also secures other debts to the same bank, if they are determined or determinable in the deed.
Do the ancillary amounts increase my loan?
Not the amount you borrow: they serve as the basis for calculating the duties (capital + ancillary amounts) and cover costs the bank might advance (notaire.be).
General information drawn from the official sources cited and dated on this page. It is not legal, tax or financial advice: for your own situation, ask a licensed professional.
More guides on financing
- Bridging loan in Belgium: buying before you have sold
- Chèque habitat, housing bonus: tax relief on a home loan
- Deposit and loan-to-value: what Belgian banks expect
- Fixed or variable mortgage rate in Belgium
- Getting a mortgage in Belgium as an expat
- Mijn VerbouwLening: Flemish renovation loan, rates and terms
- Mortgage broker in Belgium: role, FSMA and cost
- Mortgage life insurance in Belgium: compulsory or not?
- Refinancing a mortgage in Belgium: reinvestment fee and costs
- Social mortgage loans: Wallonia and Brussels
Sources
- L'hypothèque et le mandat hypothécaire (notaire.be) (consulted 13 October 2026)
- Un prêt hypothécaire, une ouverture de crédit, une hypothèque, un mandat hypothécaire : quelles différences ? (notaire.be, 26 novembre 2020) (consulted 13 October 2026)
- Les frais liés au crédit hypothécaire (notaire.be) (consulted 13 October 2026)
- Quels sont les frais liés à un crédit hypothécaire ? (wikifin.be) (consulted 13 October 2026)