Yes, using the overwaarde on your Dutch home to fund a Spanish purchase is a common and workable route, but it is not automatically the smartest one. You have two broad paths: release equity by raising your mortgage in the Netherlands, or take a mortgage from a Spanish bank. The two produce very different tax outcomes, and, this is the part almost no one explains, they can compete with each other. Release too much equity at home and the Spanish bank may decide it will not lend to you at all.
In short:
- What is overwaarde? The difference between your Dutch home’s market value and the mortgage still owed on it. Jump to section
- Dutch equity or a Spanish mortgage? Two routes, two tax results. Jump to section
- The tax cross-over: interest on equity you release for a Spanish home is not deductible* in the Netherlands; a Spanish mortgage is a Box 3 debt that does reduce your taxable base*. Jump to section
- The trap: release the equity first and the Spanish bank may refuse your mortgage. Jump to section
This is the spoke that sits underneath the full Spanish mortgage guide for Dutch buyers. In Upscore’s data, the Dutch applicant comes in with more of their own capital than buyers from other countries, and a large share of that capital comes from equity released on the home in the Netherlands. Below we put the two routes side by side, with the tax picture that most advisers leave out.
What is overwaarde, and how do you access it?
Overwaarde is the built-up equity in your Dutch home: the difference between its current market value and the mortgage debt still outstanding (the restschuld), minus any selling costs. If your home is worth 450,000 euros and you still owe 250,000 euros, you have roughly 200,000 euros of overwaarde.
A Dutch lender (geldverstrekker) assesses this against the WOZ value or, better, against a formal valuation (taxatie). On that market value the bank calculates the loan-to-value (LTV), the ratio between your mortgage debt and the value of the home. The lower that ratio, the more room you have in principle to release equity.
You do not have to sell the house to reach the equity. Through a valuation you can raise your existing mortgage (a higher registration, or hogere inschrijving) or take out a second charge on the property. That is how you free the equity without moving. The cash that comes out is then available as your own funds for the Spanish purchase.
Should you release Dutch equity or take a Spanish mortgage?
This is the real decision. You broadly finance the Spanish purchase one of two ways.
Route 1, release equity in the Netherlands. You raise your Dutch mortgage or take a second charge on your own home. The cash you free up goes into the Spanish purchase as your own capital. In Spain you then pay partly or fully in cash, and finance less or nothing locally.
Route 2, take a mortgage from a Spanish bank. You let the property in Spain be financed where it sits. Spanish banks typically lend non-residents 60% to 70% of the value, so you bring at least 30% to 40% of your own money, plus the buyer’s costs (in Spain commonly 10% to 14% of the price). The Bank of Spain sets the supervisory framework that shapes these limits.
The two routes are not independent. If you release a large amount of equity in the Netherlands, your monthly outgoings rise, and the Spanish bank may then conclude there is too little room left to grant you a mortgage on top. The paths compete. We come back to this below.
What does the Dutch bank require?
Releasing equity in the Netherlands comes with strict rules. The lender wants to see that your income can carry the higher payments, and looks at your total debt load. A rule of thumb advisers apply: keep your housing costs after the increase below roughly 35% of gross income (the debt-to-income ratio, or DTI). Go above that and the increase becomes difficult.
The lender will also almost always ask what the released money is for. This is where the catch sits: Dutch banks like to see equity go back into a stable investment, but for property abroad they are often cautious. Investing in a home as such is fine; financing a home in Spain, less so. Some lenders are open to a foreign purchase, so refinancing (oversluiten) to one of those parties can be a way through. Crucially, releasing equity is a Dutch process on a Dutch timeline, so start it early; it does not move at the pace of the Spanish purchase.
The right choice between releasing Dutch equity and taking a Spanish mortgage depends on your income, your existing Dutch mortgage, and the property itself. Upscore’s Finance Passport models both routes on a specific home, so you see your realistic Spanish borrowing range before you release any equity at home.
The tax cross-over almost everyone skips
This is the part that decides the choice, and exactly the part most comparisons leave out.
Interest on the equity you release is not deductible in the Netherlands.* Dutch mortgage interest relief applies only to the financing of your own primary home, which is taxed in Box 1*. If you raise your mortgage, or take a second charge, to buy a home in Spain, that debt does not fall under the primary-residence rules*. You pay interest, but you get nothing back for it at tax time.
A mortgage from a Spanish bank, by contrast, creates a debt that is deductible in Box 3.* Box 3 is the Dutch tax on assets (savings and investments). A second home in Spain is declared in the Netherlands as a Box 3 asset at its market value*, and the mortgage secured on that home can be deducted from your taxable wealth*, above the debt threshold of roughly 3,700 euros per person*. That lowers your Box 3 base and the wealth-return levy you pay on it*. Confirm your own position with the Belastingdienst, because the way you finance the property is what determines whether the debt counts for tax or not*.
In other words, the financing route, not just the interest rate, decides whether your debt works for you at tax time. That is why this choice should not be made on the rate alone.
One caveat on the tax treaty. The Netherlands and Spain have agreed a new tax treaty, but as of mid-2026 its contents are not yet public, so exactly how double taxation will be avoided cannot be stated with certainty*. Do not bank on the current rules alone, and have your situation modelled before you choose. On the Spanish side, your obligations as a non-resident owner are set out by the Spanish Tax Agency (non-resident income tax* and the annual IBI property tax*).
The two routes side by side
| Route 1, release Dutch equity | Route 2, Spanish bank mortgage | |
|---|---|---|
| How it works | Raise the existing mortgage or take a second charge on your Dutch home; bring the cash into Spain as your own capital | Spanish bank finances 60 to 70% of the Spanish home; you bring 30 to 40% plus buyer’s costs |
| Tax treatment (NL) | Interest is not deductible* (the debt does not fall under Box 1 primary-residence relief*) | The debt on the Spanish home is deductible in Box 3*, above the threshold* |
| Effect on your Spanish mortgage | Higher Dutch outgoings, the Spanish bank may grant no mortgage at all | You keep your Dutch outgoings unchanged, leaving room for the Spanish loan |
| Timeline | About a month on average, faster if all documents are ready | Longer, plan for several months depending on the bank |
The trap: the two routes can rule each other out
This is the mistake worth saving Dutch buyers from. Suppose you release equity in the Netherlands first, to “have the cash ready”, and then apply for a Spanish mortgage anyway. The Spanish bank looks at your total cost picture, including that higher Dutch mortgage. On top of that, a Spanish bank treats released equity as borrowed money, not as genuine savings, and is wary of it.
The result: by releasing the equity, the room you have for a Spanish mortgage can shrink, or disappear entirely. If you can show that you also hold real savings alongside the released equity, Spanish banks will often accept 50% to 70% of your contribution coming from overwaarde. But do not assume they will be lenient.
The core point: choose your route deliberately and in the right order. If you want to combine both, have the full calculation run first, so you do not stall halfway through the Spanish application. Our explainer on how equity works when buying a second home covers the mechanics in more detail.
Most Dutch buyers release equity first and worry about the Spanish mortgage later, which is the wrong order. Use our Spanish mortgage calculator to see how much you can borrow in Spain and how much of your own money you need, so you can compare the two routes with real figures.
What we see in practice
Upscore Dutch applicant data: Dutch applicants request a median loan-to-value of around 70%, against 77 to 78% for American and British buyers. The Dutch buyer puts down relatively more of their own capital, and a large part of it comes from the equity built up in the home in the Netherlands.
That pattern shows up among buyers who have already been through it. On the VIVA forum, a Dutch buyer writes that they funded the purchase with the equity from their house in the Netherlands:
“We funded it with the equity from our house in the Netherlands… had the mortgage raised.” Brunette84, VIVA forum
And on spanjeforum, the advice many buyers are given runs the same way:
“We were advised to use the equity from our house in NL to finance the purchase.” spanjeforum (quote still to be verified against the source)
It explains why the Dutch buyer often arrives at the table with a substantial sum. The question is not whether you have equity, but how you deploy it without getting in the way of your Spanish mortgage. If you are still choosing a lender, see our guide to the best Spanish banks for foreign buyers, and for the full tax picture, our breakdown of Dutch Box 3 tax when buying property in Spain goes deeper than this spoke can.
Frequently asked questions
Can I use my overwaarde for a second home in Spain? Yes. You raise your Dutch mortgage or take a second charge, and bring that money into Spain as your own capital. Bear in mind that not every Dutch lender accepts a release for foreign property.
Is the interest on my released equity tax-deductible? No. If you use the equity for a home in Spain, the debt does not fall under Dutch primary-residence relief, so the interest is not deductible*. A mortgage from a Spanish bank, by contrast, is a debt you can deduct in Box 3*.
Will I still get a Spanish mortgage if I release equity first? Not necessarily. The higher Dutch outgoings, and the fact that a Spanish bank treats released equity as borrowed money, can shrink your borrowing room in Spain. Have the full calculation run before you act.
How much cash do I need alongside my equity? Spanish banks finance non-residents at roughly 60 to 70%, plus 10 to 14% in buyer’s costs that you pay yourself. Plan for 30 to 45% of your own capital in total. Banks like to see that part of it is genuine savings, not only released equity. Check the live Euribor rate before you assume a monthly payment.
Once you have identified a specific home, get a Finance Passport: a pre-check of your financing that shows whether your overwaarde route gets in the way of your Spanish mortgage, before you make an offer. In Upscore’s data, buyers who have already chosen a property are far further along than those still exploring.
* For informational purposes only. This is not tax advice. Please consult your tax adviser.
