TL;DR: In the Netherlands, the mortgage payment is only one part of the buying budget. Plan separately for transfer tax, notary, valuation, mortgage advice, possible purchase support, inspection, insurance, moving costs and a cash buffer.

Editorial image of buyer-cost planning materials with a calculator, documents and a small model house.

Short answer

Buyer costs outside mortgage Netherlands usually means the cash and one-off costs around buying and financing a home. Some costs belong to the purchase, some belong to the mortgage, and some start after completion.

Rijksoverheid explains that buyers pay costs besides the mortgage, including possible estate-agent costs, building inspection and valuation costs. It also explains that existing homes are usually bought kosten koper, where the buyer pays transfer tax and the notarial transfer deed costs: Rijksoverheid on costs when buying a home.

For broader English guidance on the buying process around viewings, offers and documents, use Buy a house in the Netherlands.

The practical point is simple: own funds may first be needed for costs around the purchase. Only the cash left after those costs can reduce the loan amount in a simple calculator.

The three cost buckets

Purchase costs Typical items Transfer tax, notarial transfer deed, buyer agent, building inspection and sometimes valuation. Why it matters These costs affect the cash you need to complete the purchase.
Financing costs Typical items Mortgage advice, mortgage mediation, mortgage deed notary, valuation for the loan and NHG application if relevant. Why it matters Some may be deductible, but they still affect the cash plan.
Owner costs after completion Typical items Insurance, maintenance, OZB, homeowners association costs and sometimes erfpacht. Why it matters These can sit outside a mortgage calculator and still affect monthly comfort.

Why the calculator keeps buyer costs separate

Rijksoverheid says the maximum mortgage is usually limited to 100% of the home value, and a taxateur sets that value: Rijksoverheid on maximum mortgage basics.

If the property value or taxatie itself is the main uncertainty, use Property valuation in Eindhoven for the valuation-focused route.

That is the reason buyer costs can create a cash gap. If a home costs EUR 525,000 and your own funds are EUR 60,000, buyer costs of EUR 17,000 leave EUR 43,000 to reduce the mortgage amount in a simple estimate.

This cash gap matters even when the gross monthly payment looks acceptable. A buyer can have enough income for a payment estimate and still need more cash before the purchase can happen smoothly.

Transfer tax and starter exemption

Belastingdienst lists the transfer-tax rate as 2% for a home where the buyer will live for the longer term and where the starter exemption does not apply. From 2026, the rate for a home that is not used as the buyer’s main residence is 8%, while other real estate can be 10.4%: Belastingdienst on transfer-tax rates.

Belastingdienst says the starter exemption can apply when the buyer will live in the home, is older than 18 and younger than 35 at transfer, has not used the exemption before, and the home value is not above EUR 555,000: Belastingdienst on the starter exemption.

The homepage calculator uses a 2% default for an owner-occupied home where the starter exemption does not apply. Change the assumption in your own planning if your situation is different.

Deductible and non-deductible costs

Belastingdienst separates costs for getting the mortgage from costs for buying the home. It lists mortgage adviser and mediation costs, mortgage deed notary costs, valuation costs for getting the loan and NHG application costs as costs that may be deductible when they relate to the own-home debt: Belastingdienst on deductible and non-deductible home costs.

The same Belastingdienst page lists costs that are not deductible, including estate-agent purchase costs, transfer tax, VAT, notary and cadastral costs for the purchase deed, maintenance and renovation costs, repayment of the home debt and bank-guarantee costs.

Treat deductibility as a tax topic to check, not as cash you can ignore. A deductible cost still needs to be paid first.

Simple cash-gap example

Home price EUR 525,000
Own funds available EUR 60,000 before buyer costs.
Buyer costs assumption EUR 17,000 for transfer tax, notary, valuation and advice-cost planning.
Own funds after buyer costs EUR 43,000 left to reduce the estimated mortgage amount.
Indicative mortgage amount EUR 482,000, based on home price minus own funds left after buyer costs.

The exact cost mix can differ. Use the example to understand the logic, then ask for a check before you set a bid limit.

What to check before bidding

Whether the home is existing kosten koper or new-build vrij op naam.
Whether the 2% transfer-tax rate, 0% starter exemption, 8% non-main-residence rate or another rate may apply.
Whether purchase-deed notary costs and mortgage-deed notary costs are being mixed.
Whether a valuation or taxatie is needed for the mortgage.
Whether a building inspection is sensible for the property.
Whether advice and mediation costs are paid up front.
Whether your own funds still leave a cash buffer after buyer costs.
Whether monthly owner costs such as insurance, VvE, maintenance, OZB or erfpacht change comfort.

For monthly affordability, read calculate mortgage payment in the Netherlands. For borrowing range, read maximum mortgage in the Netherlands for expats. For calculator assumptions, read what a Dutch mortgage calculator can and cannot tell you. For the wider buying journey, use Buy a house in the Netherlands.

Next step

Use the calculator to see the first payment estimate, then request a mortgage/adviser check if buyer costs may change the amount you can safely bid.

Use the calculator Request a mortgage/adviser check

FAQ

Are buyer costs included in the monthly mortgage payment? Usually they are separate. A simple monthly payment estimate focuses on the mortgage amount, interest rate and term. Buyer costs affect the cash needed around the purchase.
Can I finance buyer costs inside the mortgage? The mortgage is usually limited to the value of the home. A higher loan may be possible for energy-saving measures, but buyer costs should be treated as a separate cash question.
Is transfer tax always 2%? No. The 2% rate is for a home where the buyer will live for the longer term and where the starter exemption does not apply. Other rates or the starter exemption may apply depending on the situation.
Are mortgage advice and valuation costs deductible? They may be deductible when they are costs for getting the mortgage and relate to the own-home debt. Check your own tax position before relying on this.
Why does the calculator subtract buyer costs from own funds first? Because those costs may need to be paid around the purchase. The cash left after buyer costs is the amount that can reduce the estimated mortgage in the calculator.
When should I request a check? Request a check when buyer costs may affect your bid limit, cash buffer, valuation timing, mortgage amount or decision to spend money on the buying process.