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Mortgage Installments: A Complete Guide to Calculating and Choosing the Best Home Loan

Article
14 Aug 2025

A mortgage is a popular solution to owning your dream home. This article covers the types of mortgages, how to calculate monthly installments, and tips for choosing the best loan based on your financial capacity and lifestyle.

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Owning a home is a dream for many people. However, with property prices continuing to rise, buying a house outright has become increasingly difficult. A Home Ownership Loan (KPR) has become a popular solution to help make home ownership a reality. But before applying for a mortgage, it’s important to understand how to calculate the installments and choose the type of mortgage that best suits your needs. The complete guide below will help you.

Key Takeaways:

  • A mortgage is a loan product from banks specifically designed for home purchases.
  • Before applying, understand the types of mortgage products available.
  • The mortgage formula considers the loan principal, interest rate, and loan term (tenor).

What Is a Mortgage (KPR)?

KPR or Home Ownership Loan is a bank loan product aimed at helping people purchase homes. With a KPR, you can own a home through installments over a specified period, generally between 5 to 25 years.

Types of Mortgages

Here are the various types of KPR commonly offered by banks in Indonesia:

  • Subsidized Mortgage: Intended for low-income individuals (MBR) offering low fixed interest rates and down payment assistance.
  • Non-Subsidized Mortgage: Not part of a government program, offering more flexibility in terms of home prices and location.
  • Sharia Mortgage: Uses Islamic principles with no interest (riba); monthly installments remain fixed throughout the loan term.
  • Take Over Mortgage: Allows you to transfer your existing mortgage from one bank to another, usually to get better rates or terms.
  • Refinancing Mortgage: A new loan using your owned property as collateral, often used for renovations or urgent needs.
  • Multipurpose Mortgage: A loan using your existing property as collateral for other needs outside of home purchase.
  • Pre-Construction Mortgage: For homes that are still under development; disbursement is done in stages according to construction progress.
  • Micro Mortgage: For purchasing or renovating modest homes, with a small loan ceiling and shorter term, targeted at informal income earners.

How to Calculate Mortgage Installments

Before applying for a mortgage, make sure the monthly installment suits your financial capacity. Here's how to calculate it:

  1. Use the Mortgage Formula:
    Monthly Installment = (P × r × (1 + r)^n) / ((1 + r)^n – 1)
    P = loan principal, r = monthly interest, n = number of months
    Example: A loan of IDR 500 million with 8% annual interest over 15 years results in a monthly installment of approximately IDR 4.78 million.
  2. Assess Your Financial Capacity:
    Ideally, mortgage installments should not exceed 30–35% of your monthly income. For example, if you earn IDR 15 million per month, the ideal installment is around IDR 4.5 million.
  3. Use Online Mortgage Calculators:
    You can use simulation tools from BTN’s official website to estimate your monthly payments easily.

Tips for Choosing the Best Mortgage

  • Choose the Right Interest Type:
    Fixed interest is great for stability at the start; floating interest can be lower after the fixed period ends.
  • Consider Additional Fees:
    These may include administration fees, notary fees, life and property insurance.
  • Compare Bank Offers:
    Each bank has different offers. Compare interest rates and loan terms to find the best deal.
  • Look for Mortgage Promotions:
    Many banks offer low-interest promos or discounted admin fees—these can reduce your overall costs.
  • Understand the Terms and Conditions:
    Including early repayment penalties, extension terms, and any restrictions.

Make Your Dream Home Come True with Bank BTN!

Are you looking for a trusted home financing solution? Bank BTN is here to help with a wide range of subsidized and non-subsidized mortgage options, competitive interest rates, easy processes, and professional services.

Find the mortgage that best fits your needs and enjoy the convenience of home ownership with Bank BTN. Visit btn.co.id and make your dream home a reality today!


Writen By

sekretaris

Ramon Armando

Corporate Secretary PT Bank Tabungan Negara Persero) Tbk | Csd@btn.co.id

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