Mortgage Calculator (Value Added)
Calculate loan requirement incl. closing costs, monthly payment (annuity), remaining debt after fixed interest period, total term, interest and annual overview – incl. special repayments.
Inputs Adjust $ & %
Result Dashboard ready
| Year | Interest | Principal | Special Pmt. | Remaining Debt |
|---|---|---|---|---|
| No calculation yet. | ||||
Explanation: What this calculator really does for you
This mortgage calculator is designed not just to "spit out a payment", but to give you a realistic feel for the total financial burden. You start with the Property Price and add the Closing Costs as a percentage. Since property transfer tax, notary/land registry fees, and potential broker fees vary regionally and individually, the percentage value remains editable. Optionally, you can enter a Safety Buffer (e.g., for minor renovations or moving), so the loan requirement isn't calculated too tightly.
In the second step, you define the financing via Interest Rate and Initial Repayment. This results in the typical Annuity: a constant monthly payment where the ratio of interest to principal shifts over time. At the beginning, the interest portion is high; later it drops because the remaining debt falls. You see exactly this effect in the chart and in the annual overview. Additionally, you can set a Special Repayment per Year. This often significantly reduces the term – especially if you use it early in the loan period.
The Fixed Interest Period is the timeframe during which your interest rate is locked. The calculator therefore shows you not only the theoretical total time until "debt-free", but also the Remaining Debt at the end of the fixed period. This is the value decisive for follow-up financing. The smaller the remaining debt, the more relaxed the next negotiation will be – because you have to refinance a smaller amount and can change providers more easily if needed.
Important: The calculator works with your inputs and simplified assumptions (e.g., constant payment, special repayment once annually). It does not replace professional advice or a binding offer. However, it helps you compare scenarios in seconds: more equity vs. higher repayment, special repayment yes/no, or a different fixed period. Use the result as a basis for discussion with a bank or broker – and always ensure sufficient liquidity for daily life, reserves, and maintenance.
FAQ
How accurate are the results?
Very good for scenario comparisons. Exact bank offers may deviate (Fees, payment dates, rounding, repayment changes).
What are "Closing Costs" and why as a percentage?
These include tax, notary/land registry, and potentially broker fees. Since it varies by state/deal, you set the percentage yourself.
What does Initial Repayment mean?
This is the repayment portion relative to the initial debt in the first year. Higher repayment increases the monthly payment, but lowers remaining debt and interest costs.
Why is Remaining Debt after Fixed Period so important?
It determines how large your follow-up financing will be. A smaller remaining debt reduces interest rate risk and makes you more flexible when switching providers.
Is Special Repayment worth it?
Often yes: It shortens the term and saves interest. However, check if you retain enough reserves and if special repayment is allowed in the contract.
Can the monthly payment be adjusted later?
Many loans allow repayment rate changes. This calculator simulates the "constant" standard case – ideal for understanding the baseline.
What if the monthly payment is higher than my budget?
Play with the levers: more equity, lower purchase price, longer term via lower repayment (keeping an eye on remaining debt), or less buffer.
Can I use this calculator commercially on my website?
Yes.
Embed this Calculator on Your Website
You can integrate this calculator for free into your own website. Get the embed code on our overview page.