Mortgage Refinancing Calculator 2026

Should You Refinance Your Dutch Mortgage?

If you have been living in the Netherlands for a few years and already own a home, you may be wondering whether it makes sense to refinance your mortgage (hypotheek oversluiten). Perhaps interest rates have dropped since you took out your mortgage, or maybe your financial situation has changed, perhaps your 30% ruling has expired and you are looking for ways to optimize your housing costs. Refinancing can save you tens of thousands of euros over the remaining life of your mortgage, but it is not free, and it is not always the right move.

This guide is written specifically for expats and international workers who own property in the Netherlands. It explains the Dutch refinancing process, breaks down all the costs involved, shows you how to calculate whether refinancing is worth it, and offers strategies for negotiating with your current lender. By the end, you will have a clear picture of whether refinancing makes sense for your situation.

How Mortgage Refinancing Works in the Netherlands

Refinancing your mortgage means replacing your current mortgage with a new one, either at a different bank or (less commonly) restructuring with your current lender. The new mortgage pays off your old one, and you start making payments to the new lender at the new, hopefully lower, interest rate.

The process involves several steps and parties. Unlike in some countries where refinancing is a simple rate adjustment, the Dutch system requires a new notarial deed, a fresh property valuation, and often a new mortgage advisor engagement. Here is the typical timeline:

1. Orientation and calculation (week 1-2): you compare your current rate with available market rates and estimate whether the savings outweigh the costs. This is what the calculator above helps you do.
2. Engage a mortgage advisor (week 2-3): a qualified advisor compares offers from multiple lenders, handles the application, and guides you through the process. While you can refinance without an advisor, it is not recommended, especially for expats.
3. Request early repayment penalty quote (week 2-3): you ask your current bank for an official calculation of the early repayment penalty (boeterente). This is the single most important number in your refinancing decision.
4. Apply for the new mortgage (week 3-5): your advisor submits the application to the chosen new lender. The bank reviews your income, employment, and financial situation.
5. Property valuation (week 5-6): the new lender requires a current valuation of your property by a certified appraiser.
6. Mortgage offer and acceptance (week 6-7): you receive and accept the binding mortgage offer from the new lender.
7. Notary appointment (week 8-10): the notary prepares the new mortgage deed, pays off your old mortgage, and registers the new one. Your old mortgage is formally discharged.

Throughout this process, you continue paying your current mortgage as normal. The switch happens on the date of the notary appointment, after which your new mortgage, and its new rate, takes effect immediately.

Understanding the Early Repayment Penalty (Boeterente)

The early repayment penalty (boeterente, also called vergoedingsrente) is typically the largest and most variable cost of refinancing. It compensates your current bank for the interest income they lose when you pay off your mortgage ahead of schedule.

The penalty calculation is regulated by the AFM (Autoriteit Financiele Markten, the Dutch financial authority) and is based on three factors:

• The interest rate difference: the gap between your current mortgage rate and the current market rate for a comparable remaining period. The larger the difference, the higher the penalty.
• The remaining fixed-rate period: the longer you have left on your fixed-rate period, the more interest income the bank loses, and the higher the penalty.
• The outstanding balance: the penalty is proportional to the amount you are paying off early.

Example calculation: suppose you have a mortgage of €300,000 at 5.0% with 7 years remaining on the fixed period. The current market rate for a 7-year term is 3.8%. The rate difference is 1.2 percentage points. A simplified penalty estimate is:

€300,000 x 1.2% x 7 years = approximately €25,200

In practice, the actual calculation is more complex because banks use present value discounting, and the penalty decreases as the remaining period shortens. But this gives you a rough idea: on a large mortgage with a big rate difference and many years remaining, the penalty can be substantial.

When the penalty is zero or low: if your current rate is close to or below the current market rate, the penalty will be minimal or zero. This is the ideal scenario for refinancing. It also means that refinancing is particularly attractive during periods of rising rates if your current rate was already relatively low.

Other Costs of Refinancing

Beyond the early repayment penalty, expect the following fixed costs:

Notary Fees

A notary is required to prepare and register the new mortgage deed. Since you are only refinancing (not purchasing), you typically only need the mortgage deed, not a new deed of transfer. Notary fees for refinancing are approximately €1,200 to €1,500. Compare quotes from multiple notaries to find the best price.

Property Valuation

The new lender needs a current property valuation to confirm the property is sufficient collateral for the new mortgage. This costs approximately €500 to €700. If your property has increased in value since purchase, you may qualify for a lower interest rate due to a better loan-to-value ratio.

Mortgage Advisor Fees

An advisor helps you compare lenders, negotiate terms, and manage the application process. Fees range from €2,000 to €3,500. For expats, an advisor familiar with international income structures and 30% ruling implications is especially valuable when refinancing.

The Break-Even Calculation: When Does Refinancing Pay Off?

The break-even point is the critical metric that determines whether refinancing is worthwhile. It represents the number of months it takes for your cumulative savings (lower monthly payments) to equal the total switching costs. After the break-even point, every month of lower payments is pure savings.

Formula: Break-even (months) = Total switching costs / Monthly savings

Detailed example: consider an expat named Maria who has a €350,000 mortgage at 4.8% with 22 years remaining. She can refinance to 3.9%. Here are her numbers:

Break-even point: €12,900 / €180 = 72 months (6 years)

With 22 years remaining, Maria will save for 16 years after the break-even point. That translates to approximately 16 x 12 x €180 = €34,560 in net savings over the remaining mortgage term. Even accounting for the €12,900 in switching costs, the refinancing is clearly worthwhile.

When is it NOT worth it? If the break-even point is longer than your remaining mortgage term or remaining fixed-rate period, refinancing does not make financial sense. As a rule of thumb, if the break-even point is more than 7-8 years away, proceed with caution.

Fixed vs. Variable Rate Considerations When Refinancing

When refinancing, you have the opportunity to choose a new fixed-rate period. This decision depends on your outlook on interest rates and your personal risk tolerance:

• Short fixed period (1-5 years): lower initial rate, but more frequent rate resets. Suitable if you expect rates to remain stable or decrease, or if you plan to sell within a few years.
• Medium fixed period (10 years): the most popular choice in the Netherlands. Provides a good balance between rate certainty and cost. Recommended for most expats who plan to stay in their home long-term.
• Long fixed period (15-30 years): highest rate but maximum certainty. Protects against future rate increases. Consider this if you plan to stay in the property for a very long time and prefer predictability over optimization.

The 2026 rate environment: after the significant rate increases of 2022-2024, rates have stabilized in 2026 around 3.4-4.5% depending on the fixed period. If you locked in a rate above 5% during the peak, refinancing to current rates represents a meaningful savings opportunity.

For expats with uncertain long-term plans in the Netherlands, a 10-year fixed period is often the best compromise. It locks in a competitive rate while giving you flexibility if you decide to relocate before the period ends.

Alternatives to Full Refinancing

Before committing to a full refinancing (with all the associated costs), consider these alternatives that may achieve a similar result with less hassle:

Rate Averaging (Rentemiddeling)

With rate averaging, your current bank adjusts your rate to the average of your current rate and the new market rate. The key advantages are:

• No early repayment penalty
• No notary fees
• No valuation costs
• Quick and simple process

The disadvantage is that you do not get the lowest market rate; you get an average. Example: if your current rate is 5.0% and the market rate is 3.8%, rate averaging might give you approximately 4.3-4.4%. This is better than 5.0% but not as good as the 3.8% you could get by fully refinancing.

Retention Offer (Retentie-aanbod)

When you inform your bank that you are considering refinancing, they may make a retention offer: a reduced rate to keep you as a customer. This can be a good deal because you avoid switching costs entirely. The offered rate is typically between your current rate and the market rate. Some banks even match the market rate when faced with losing a customer.

Negotiation tip: when requesting a retention offer, have a concrete offer from another lender in hand. Banks are more likely to offer competitive retention rates when they know you have a real alternative. Even if you ultimately decide to stay with your current bank, the negotiation process can result in significant savings.

Wait for Rate Reset

If your fixed-rate period is ending within the next 6-12 months, you may be better off simply waiting for the natural rate reset. At the end of your fixed period, you can renegotiate your rate or switch to a different lender without an early repayment penalty. Many banks allow you to lock in a new rate up to 6 months before your current rate expires.

Step-by-Step Refinancing Process for Expats

1. Gather your current mortgage details: current rate, outstanding balance, remaining fixed-rate period, mortgage type, and original mortgage date. These are on your annual mortgage statement (jaaropgave).
2. Use the calculator above: input your details to get an initial estimate of whether refinancing is worthwhile.
3. Request the early repayment penalty: contact your current bank for an official penalty quote. This is usually free and provided within a few business days.
4. Consult a mortgage advisor: share your current mortgage details and penalty quote. The advisor will compare offers from multiple lenders and calculate the net benefit.
5. Apply for the new mortgage: provide income documentation, employment contract, and property details. Expats with the 30% ruling should prepare for additional questions about income sustainability.
6. Complete the property valuation: schedule the appraiser. A higher-than-expected valuation can qualify you for a better loan-to-value ratio and lower rate.
7. Review and sign the offer: carefully review the new mortgage terms, especially the fine print on early repayment conditions for the new mortgage.
8. Complete at the notary: the notary discharges your old mortgage and registers the new one. Bring valid identification and your BSN number.

Tax Implications of Refinancing

An important benefit of refinancing in the Netherlands is that several costs are tax-deductible:

• Early repayment penalty: fully tax-deductible as a financing cost. On a €10,000 penalty, you can reclaim up to €3,756 (at the 37.56% maximum deduction rate).
• Notary fees for the mortgage deed: tax-deductible.
• Valuation costs: tax-deductible if required for the new mortgage.

Example: if your total deductible refinancing costs are €12,000, the tax benefit at 37.56% is approximately €4,507. This effectively reduces your net switching costs to €7,493, which significantly improves the break-even calculation.

Your mortgage interest deduction rights are fully preserved when refinancing, as long as the new mortgage continues to meet the requirements: annuity or linear repayment, primary residence, and the original 30-year deduction period. You cannot restart the 30-year clock by refinancing.

Common Mistakes to Avoid When Refinancing

• Ignoring the penalty in your calculation: some expats focus only on the monthly savings without fully accounting for the early repayment penalty. Always request the actual penalty amount before making a decision.
• Extending the mortgage term: refinancing to a longer term lowers your monthly payment but increases total interest paid. Try to keep the same remaining term or shorten it.
• Forgetting about tax deductibility: the tax benefit on refinancing costs is significant. Factor it into your break-even calculation.
• Not negotiating with your current bank first: a retention offer or rate averaging might achieve 80% of the benefit at zero switching cost.
• Refinancing too close to rate expiry: if your fixed rate expires within 12-18 months, the early repayment penalty may be low, but you might save even more by simply waiting for the natural rate reset.
• Choosing the cheapest rate without considering the lender: some lenders have restrictive conditions on future early repayment, portability, or extra repayments. Read the fine print.

Frequently Asked Questions

Sources

• AFM: Mortgage Refinancing
• NIBUD - National Institute for Budget Information
• Belastingdienst (Dutch Tax Authority)
• Government of the Netherlands