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GuidesReal estateMortgageHow loan payments work

Loan installments — how they work and what they depend on

Calculate in 30 seconds

Use our calculator — result in seconds, no registration required.

Mortgage calculator — payment, down payment

Table of contents

  • Fixed (annuity) instalment
  • Decreasing instalment
  • What affects instalment size
  • Instalment vs total cost
  • Instalment vs rent
  • Common mistakes
  • Frequently asked questions (FAQ)

Loan instalments come in two main types: fixed (annuity) and decreasing. Below is a clear explanation, what affects the instalment size and why a lower instalment is not always a cheaper loan.

Fixed (annuity) instalment

The instalment amount is stable. Early payments are mostly interest, later more principal.

Decreasing instalment

The principal part is constant, interest decreases over time. Instalments gradually fall, but the first months are higher.

What affects instalment size

Not just the interest rate. It also depends on the margin, loan term, fees and insurance. Two loans with the same amount can have different instalments due to different conditions.

Instalment vs total cost

Lower instalment does not always mean cheaper. A longer term increases total interest paid. Compare total cost, not only the monthly instalment.

Instalment vs rent

If you compare renting with borrowing, use the instalment vs rent calculator. Remember: instalments build equity, rent does not.

Common mistakes

  • comparing only instalments without fees,
  • ignoring the effect of loan term,
  • skipping interest‑rate risk,
  • not comparing offers.

Try it in practice

Use our calculator — result in seconds, no registration required.

  • Mortgage calculator — payment, down payment
  • Loan calculator — instalment, APR, cost
  • Mortgage payment vs rent — calculator

Frequently asked questions (FAQ)

Czy rata stała oznacza zawsze niższy koszt?+
Nie. Stała rata daje przewidywalność, ale nie zawsze niższy koszt.
Co bardziej wpływa na ratę: okres czy oprocentowanie?+
Oba elementy są kluczowe — dłuższy okres zwykle obniża ratę, ale podnosi koszt całkowity.
Czy RRSO pokazuje realny koszt rat?+
RRSO uwzględnia część kosztów pozaodsetkowych, ale warto analizować też umowę i harmonogram.

Related guides

  • Mortgage instalment — how to calculate it and what it depends on
  • Rent or mortgage?

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Related calculators

  • Mortgage calculator — payment, down payment
  • Loan calculator — instalment, APR, cost
  • Mortgage payment vs rent — calculator

Related guides

  • Mortgage instalment — how to calculate it and what it depends on
  • Rent or mortgage?
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