Mortgage broker in Luxembourg: what they do and what it costs
Skimming?
We've prepared the shortcut for you.
What a mortgage broker actually does
A mortgage broker, also called a credit intermediary, is a professional who acts as the link between you and the banks to get your mortgage, meaning the loan that finances the purchase of your home. In practice, you explain your project once, they build your file, send it to several banks, compare what comes back, and present you the offers. You stay in control from start to finish: you choose, and you sign.
In Luxembourg, this job is regulated by law. A broker must be licensed by the CSSF, the Commission de surveillance du secteur financier, the authority that supervises the country's financial sector. To get this licence, they must prove their good standing, their skills in the mortgage field, and hold professional insurance. In other words, you don't just call yourself a broker.
There are two profiles to know. A tied broker works for a single bank or a small group of banks. An independent broker compares a wide range of institutions. This distinction matters, because it sets how broad the comparison you're offered will be.
How much a broker costs in Luxembourg
This is the point nobody explains clearly, partly because most content on the subject is written by brokers themselves. Here's how it really works.
In the vast majority of cases, the broker is free for you. Their pay comes from the bank that grants your loan: it pays them for the preparation work and because they bring in a file that's ready to process. So you don't get a bill from them.
That doesn't mean the service falls from the sky. Fees can exist in some cases: a separately billed advisory service, a particularly complex file, or the case where the broker also handles your outstanding balance insurance, the insurance that repays the loan to the bank in the event of death or disability. The rule to remember is simple: ask from the start, in writing, whether anything is charged to you. A serious broker will tell you plainly, and will never ask you to pay fees up front before your financing is secured.
Broker or bank directly: how to choose
Using a broker is in no way mandatory. You can perfectly well knock on the banks' doors yourself. The real question is what fits your situation.
When a broker really makes a difference
There are a few cases where the support genuinely changes things:
- First purchase: you don't yet know the ins and outs of credit, a broker saves you time and spares you beginner's mistakes.
- Atypical profile: self-employed, variable income, fixed-term contract, expat or cross-border worker. Knowing which bank accepts which profile is worth its weight in gold.
- Little time: preparing a file per bank, following up, comparing, it takes hours. The broker centralises everything.
- Moving rate market: in early 2026, fixed rates were around 3% to 4% depending on the term and profile, and they move regularly. A broker tracks these gaps daily.
When you can do without
If your file is simple, with stable employment and a solid down payment, and your bank already sees you favourably, going direct can be enough. Your bank already knows your accounts and can make you a decent offer without an intermediary. Nothing stops you from doing both either: get an offer from your bank, then have a broker challenge it to see if they can do better.
What a broker won't do for you
A broker isn't a magician, and it helps to know that before you contact one.
They don't guarantee the bank's approval. They put your file in the best possible shape, but the final decision always belongs to the bank.
They don't decide for you. The choice of rate, term and loan type stays yours. A good broker explains the options, they don't force you.
They don't replace the notary or tax advice. Schemes like the Bëllegen Akt (ouvre dans un nouvel onglet), the tax credit that cuts notary fees by up to 40,000 euros per buyer for your main home, or the deductibility of loan interest, follow precise rules. A broker can point you in the right direction, but for your exact situation, a tax advisor can help you see things more clearly.
How to spot a serious broker
A few simple reflexes before you hand over your project.
Check that they're licensed. Mortgage credit intermediaries authorised in Luxembourg are listed by the CSSF (ouvre dans un nouvel onglet), and you can consult this register online. If the name isn't there, be wary.
Look at their transparency on pay. A clear broker tells you who pays them and whether any fees concern you, without you having to push to find out.
Make sure they genuinely compare several banks. A broker tied to a single institution can be useful, but you'll then know the comparison is limited to their partner.
Avoid pressure. A serious professional doesn't rush you to sign, doesn't ask you to pay money up front, and is perfectly fine with you thinking it over or comparing elsewhere.
Frequently asked questions
In most cases, no. The broker is paid by the bank that grants the loan, not by you. Fees can exist for certain advisory services or complex files: ask in writing before you commit.
Sometimes yes, sometimes no. Their job is to make banks compete, which can improve your rate or your terms. But your own bank, which knows your accounts, can also make you a good offer. The safest route is to compare both.
Technically yes, but it's not always smart. Banks generally process a given file only once, whatever the entry point. Sending your request through several brokers in parallel can muddle your file. Better to pick one you trust.
Yes. If your current loan no longer fits, a broker can look into a buyout or a renegotiation with other banks. Watch out for possible fees, such as early repayment penalties: the gain has to cover these costs. Here again, an advisor can help you do the maths.