You need a BSN for a mortgage in the Netherlands, full stop. It is one of the first things a lender asks for, right alongside your passport and residence permit. Without it, you cannot even start the application process, let alone sign anything at the notary.
Lenders in the Netherlands treat your BSN (burgerservicenummer, or citizen service number) as a core piece of identification, on the same level as your passport. It is used to verify who you are and to link your file to the right person, which matters a lot when a bank is about to lend you several hundred thousand euros.
In practice this means your BSN sits right at the top of the document checklist, next to a valid passport or ID. If that number is missing from your file, the lender simply cannot move forward with the assessment, no matter how strong your income looks on paper.
This is not a special expat rule. Every mortgage applicant in the Netherlands, Dutch or not, needs a BSN in the file before a lender will issue a formal offer.
Your BSN is only one item on a longer list. Expats typically also need an employment contract, a recent employer statement, a handful of payslips, and proof of your residence permit. Some lenders also ask for evidence of your foreign credit history if you have only recently moved to the Netherlands.
The table below gives you a quick overview of what tends to come up most often.
| Document | Why it matters |
|---|---|
| Passport or ID with BSN | Basic identity check required by every lender |
| Employment contract and employer statement | Confirms your income and job security |
| Recent payslips | Backs up the figures in the employer statement |
| Residence permit | Shows you are legally allowed to live and work in the Netherlands |
Because this list differs slightly from lender to lender, it helps to have someone check your specific documents before you start bidding on a property. That is exactly the kind of thing the advisory team sorts out with clients every week.
No, you do not need Dutch citizenship or a permanent residence permit to get a mortgage here. The borrowing rules for expats are the same as for Dutch nationals, so there is no separate, less favourable set of terms just because your passport is foreign.
What lenders do check is how long you have been living in the Netherlands, and this minimum residence period varies by lender, ranging from as little as one month to six months or longer at others. Your salary generally needs to be paid in euros, since most lenders will not accept income in a foreign currency.
If you are buying with a partner, that partner also needs to be a resident of the Netherlands. This trips people up more often than you would expect, especially when one partner is still finishing up a job abroad.
A temporary contract does not automatically rule you out. If your employer is willing to provide a letter of intent, called an intentieverklaring, stating they plan to extend or make your position permanent, many lenders will accept that as sufficient proof of income stability.
This letter is often the difference between a lender saying yes and a lender asking you to wait another year. It is worth asking your HR department about this early on, well before you start viewing properties, so you are not scrambling for it once you have found the right home.
The 30% ruling lets qualifying highly skilled migrants receive 30 percent of their salary tax free for up to five years, and in 2026 that percentage is still 30 percent. From January 2027, this drops to 27 percent for people whose ruling first applied in 2024 or later, while those who already had the ruling before 2024 keep the 30 percent rate for the rest of their term.
Here is the part that surprises a lot of expats: most lenders calculate your borrowing capacity based on your full gross salary, as if the whole amount were taxable, rather than on the reduced amount you actually pay tax on. So the ruling mostly boosts your net income and monthly spending room, not the maximum mortgage figure itself. Some lenders do stress test what happens once the ruling ends, so it is worth asking about this specifically when comparing offers.
One more detail worth knowing: the 30% ruling only applies if you are employed, so a self-employed expat working as a sole trader cannot use it. If you run your own BV and are employed by it as a director, you may still qualify as long as the usual conditions around recruitment from abroad, salary threshold and scarce expertise are met.
Getting a BSN for a mortgage together with the rest of your paperwork can feel like a lot when you are also trying to settle into a new country. De Kredieter helps expats get everything lined up so nothing holds up the application.
If you want that same clarity, reach out via the contact page.
