Both mortgages over time
Move the year slider to see how much principal you've paid, how much interest, and what's left.
Remaining balance over time
Balance of both mortgages, year by year.
Cumulative interest paid
How much you'll pay the bank in interest each year.
Cumulative principal paid
How much of the mortgage you've actually paid down (your future equity).
Comparing two Czech mortgage offers
When two banks offer you mortgages with different interest rates, fixation periods, or terms, the only way to know which is cheaper is to put them side by side. This calculator does that — for any property, any loan amount, any time horizon.
The "state after N years" view is especially useful when comparing offers with different fixation periods. Bank A might have a lower rate but only 3-year fix; Bank B has higher rate but 7-year fix. Set the horizon to 5 years and you see who comes out ahead under realistic assumptions.
What to compare beyond the rate
Beyond the headline interest rate, focus on RPSN (total annual cost) and the conditions attached to the rate. Many "best" rates require active accounts, life insurance, or guaranteed monthly income through the bank. If you don't meet a condition, the rate jumps 0.3–0.5 %. Always read the fine print.
Frequently asked questions
When is mortgage refinancing worth it?
The rule of thumb: refinancing pays off when the new rate is at least 0.5 percentage points lower than your current rate. Below that, refinancing costs (appraisal, registration, sometimes processing fees) eat most of the savings.
What fees come with refinancing?
Typically: property appraisal (3,000–5,000 Kč), mortgage registration (2,000 Kč), removal of original lien (200 Kč), processing fee (0–10,000 Kč — many banks waive it for refinancing). Total roughly 5,000–17,000 Kč. Outside the end-of-fixation window, the old bank can charge up to 1 % of the prepaid amount (capped at 50,000 Kč).
Can I refinance mid-fixation?
Yes, but the bank can charge a penalty up to 1 % of the prepaid amount (max. 50,000 Kč). It only makes sense with a large rate gap (1.5+ percentage points) or many remaining years.
What does "state after N years" mean?
It shows where each mortgage will be after a chosen horizon: how much principal you've paid, how much interest, and the outstanding balance. Useful when comparing offers with different fixation periods or terms.
Planning an extra payment?
Calculate exactly how much you'll save on interest.