Mortgage Calculator
Fast, accurate and free online loan mieszkaniowego calculator tool running directly in your browser.
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1Enter data
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2Click the button
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3Get the result
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return "Result ready in 0.1s";
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How does the interest rate and loan period work?
Mortgage loan (housing) is usually a 20-30-year commitment. The formula used in the calculator counts the so-called equal (annual) installments, in which at the beginning of repayment most of the installment consists of interest and a small part of capital. Over time, this proportion reverses.
Extending the repayment period (e.g. from 20 to 30 years) allows you to reduce the monthly installment, but significantly increases the total interest cost of the loan. A higher annual interest rate drastically increases the total amount you have to pay to the bank.
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This is a practical tool for calculating your monthly mortgage payment. Just enter the loan amount in PLN, repayment period in years and annual interest rate in percent. After clicking the Calculate button, you will see the monthly installment calculated according to the annuity installment formula used by all banks. The tool makes it easier to plan your home budget and analyze various scenarios for financing the purchase of real estate.
Formulas and theory
What does the calculator count.A mortgage payment is a fixed monthly payment that includes repayment of a portion of the principal and interest. Its amount depends on three factors: loan amount, interest rate and length of the repayment period. You can change these parameters in the tool to see how they affect the result.
Mathematical formula.The monthly installment is calculated using the annuity formula: R = P × r / (1 − (1 + r)−N), where: P is the loan amount, r is the monthly interest rate (annual interest rate divided by 12 and 100), and N is the number of months (years × 12). This formula ensures that the installment amount remains constant throughout the entire term, even though the proportion of principal and interest changes every month.
Default parameters.Loan amount: PLN 600,000, period: 30 years, interest rate: 7 percent per annum. In this variant, the installment is approximately PLN 3,990. You can enter other values to adjust the result to your situation.
How to interpret the result.The installment expressed in PLN is the monthly budget charge. The longer the period, the lower the installment, but the higher the total interest cost. The higher the interest rate, the larger the installment for the same amount. It is worth checking several variants to find a balance between the installment amount and the total cost of the loan.
Example calculation flow.Enter amount 600000, 30 years, interest rate 7. Click Calculate. The calculator will calculate the monthly rate, count the number of installments (360) and display the result in PLN to two decimal places. This value corresponds to the actual market model of mortgage loans.
Practical notes.The installment does not include insurance, commissions and bank fees. The calculator shows the pure value of the principal and interest installment. A change in the interest rate by 1 percentage point can significantly affect the result, so it is worth testing different scenarios.
Usage tip.If you are planning a loan with decreasing installments, you can approximate the first month by dividing the principal by the number of installments and adding interest on the remaining balance. The calculator presents the variant of equal installments, which is the model most often used by banks.
Examples
Example 1: Standard loan 30 years
Loan amount PLN 600,000, 30 years, interest rate 7 percent. The resulting installment is approximately PLN 3,990. The total interest cost over the entire period is approximately PLN 840,000. A longer period means a lower monthly burden, but a higher total cost.
Example 2: Reduction of the period to 20 years
Amount: PLN 600,000, 20 years, 7 percent interest. Installment approximately PLN 4,650. Interest throughout the period approximately PLN 516,000. It can be seen that shortening the period by 10 years saves over PLN 300,000 in interest, despite the higher monthly installment.
Fast online tools for work, study and files. They run in your browser - no installation or registration required.
Fast online tools for work, study and files. They run in your browser - no installation or registration required.