Dutch Mortgage Calculator Explained: How Banks Calculate Your Maximum

Ever wondered how Dutch banks actually calculate your maximum mortgage? Understanding the formulas and factors behind mortgage calculators in the Netherlands gives you a significant advantage when planning your home purchase.

The Core Formula: How Dutch Banks Calculate Your Maximum Mortgage

Dutch mortgage calculations are based on a standardized system regulated by the Dutch Financial Markets Authority (AFM). The calculation considers your income, existing debts, interest rates, and the property value to determine your maximum borrowing capacity.

At its simplest, the formula works like this: your gross annual income is multiplied by a factor (typically 4 to 5 times) to determine your maximum mortgage. However, this multiplier isn't fixed—it depends on current interest rates.

The Income Multiplier Explained

The income multiplier changes based on interest rates. Here's why: banks need to ensure you can afford your monthly payments. When interest rates are higher, your monthly payments are higher, so you can borrow less relative to your income.

• At 3.5% interest: Multiplier of approximately 5.0x your income
• At 4.0% interest: Multiplier of approximately 4.7x your income
• At 4.5% interest: Multiplier of approximately 4.4x your income
• At 5.0% interest: Multiplier of approximately 4.1x your income

Try our Dutch mortgage calculator to see how different interest rates affect your maximum mortgage.

What Income Counts Toward Your Mortgage?

Not all income is treated equally in Dutch mortgage calculations. Here's what banks consider:

Permanent Employment (Vast Contract)

If you have a permanent contract, banks count 100% of your gross annual income. This includes:

• Base salary
• Holiday allowance (vakantiegeld) – typically 8% of annual salary
• 13th month bonus (if contractually guaranteed)
• Regular, guaranteed bonuses (often counted at 50-100%)
• Overtime (if structural and documented over multiple years)

Temporary Contracts

Temporary contracts are treated more conservatively. Banks may apply a reduction of 10-20% to your income, or require additional documentation showing income stability. Some banks require at least 6 months remaining on your contract, while others focus on your sector and the likelihood of contract renewal.

Self-Employed (ZZP)

For self-employed individuals, banks typically calculate your income as the average profit over the last 3 years. Some lenders accept 2 years, and a few specialized lenders may accept 1 year for certain professions.

Partner Income: The 100% Rule

Good news for couples: in the Netherlands, both incomes count 100% toward your mortgage capacity. This is different from some countries where the second income is discounted.

Example: If you earn €60,000 and your partner earns €50,000, your combined income for mortgage purposes is €110,000—not €90,000 or some discounted amount.

Calculate your combined borrowing power with our Netherlands mortgage calculator.

The Loan-to-Value (LTV) Limit

In the Netherlands, the maximum Loan-to-Value is 100%. This means you can borrow up to the full purchase price of the property—but not more. The additional costs of buying (typically 4-6% of the property value) must come from your own savings.

Factors That Reduce Your Maximum Mortgage

Several factors can reduce your borrowing capacity:

• Student debt (DUO): Banks calculate 0.45% of your original loan amount as a monthly obligation, even if your actual payments are lower.
• Other loans: Car loans, personal loans, and credit card debts are deducted from your capacity at 2% of the outstanding balance per month.
• Alimony payments: Regular alimony you pay reduces your available income.
• Age: If you're over 50, the maximum loan term may be shorter, which can affect your capacity.

The NHG Factor in 2026

If your mortgage is under €450,000 (2026 limit), you may qualify for NHG (Nationale Hypotheek Garantie). NHG provides a government-backed guarantee that can reduce your interest rate by 0.15-0.3%—which, in turn, increases your maximum borrowing capacity. Learn more in ourNHG Guide.

How Accurate Are Online Calculators?

Online mortgage calculators for the Netherlands provide a solid estimate based on general lending criteria. Our calculator at Expat Mortgage Pro uses the same formulas Dutch banks apply, making it a reliable planning tool.

However, for a binding offer, you'll need to apply through a mortgage advisor or bank, who will assess your complete financial situation including factors that calculators can't capture.

Getting Professional Help

While calculators provide excellent estimates, complex situations benefit from professional advice. Our AFM-registered mortgage advisors can provide a personalized calculation and help you navigate the Dutch mortgage process.