ČNB repo rate and Czech mortgages: how fixed and variable loans respond

The letter arrives a few months before the fixation ends. It names a new rate, a new payment and a date, and it is the first time in years the borrower has thought about the central bank. By then the decision that shaped the number was made long ago, and the bank's offer already reflects what it expects next. That is the borrower's side of a rate cycle, and it is different from the market's side.

This article follows the repo rate to a borrower's payment, on fixed and variable loans, with hypothetical arithmetic. The wider market story, including prices and supply, is in how interest rates reach the property market. None of the figures below is a quote or a forecast.

What the repo rate is, and is not

The two-week repo rate is the Czech National Bank's main policy rate. It sets the price of short-term money in the banking system. A mortgage is a long loan priced by the bank on its funding costs, margin and competition, so the policy rate is an input and not the answer. For the machinery, see the Czech National Bank and monetary policy.

The repo rate has other, quieter uses. In the law on late payments, the interest on a delayed payment is the repo rate on the first day of the half-year plus eight points, fixed for the whole delay, with a flat compensation of CZK 1,200 per claim (as of 2026; check Government Regulation No. 351/2013 Coll.). A change in the repo rate therefore changes what lateness costs, as well as what a mortgage costs. See late payment rules and debt recovery.

Fixed loans: nothing, then everything

Most Czech housing loans have a rate fixed for a set period, commonly between one and ten years. During that time the payment does not change when the central bank does. That is the product: the bank takes the rate risk for the period, and the borrower pays for the privilege through the rate.

When the fixation ends, the loan is re-priced at what the bank offers then. The borrower may accept, negotiate, move the loan to another bank or repay. The change can be large because it arrives all at once.

A hypothetical example. A borrower takes CZK 2,500,000 over 25 years at 4%, fixed for five years. The payment is about CZK 13,196 a month. After 60 payments about CZK 2,178,000 of the loan remains, with 20 years to run.

Two points follow. The reset hurts more when the original rate was low, which is why a long fixation at a low rate is valuable. And the effect does not depend on what the repo rate did over the fixation. It depends on where the bank's offer is on the day.

Our explainers on choosing between 1, 3, 5 and 10 years and on rates and fixation cover the choice.

Variable and short-fixation loans

A loan with no fixed rate, or a fixation of a year, passes market moves on quickly. Its rate or payment follows a reference rate or the bank's current pricing, and it may be reset often. The exact terms vary by bank: what is the reference, how large is the margin, how often does it change, and how is the change notified. They are in the contract, and they decide how fast a central bank decision reaches you. The advantage is that a falling market helps quickly, and that early repayment in a period without a fixed rate is free. The risk is the mirror image.

Most borrowers choose between the two on temperament as much as on arithmetic: do you prefer a known payment or a possible saving? There is no right answer in advance, and past decisions look good or bad with hindsight.

What the borrower can do

The mortgage calculator on Hypoteky.com lets you test the payment on a given balance, rate and remaining term, and its guide to refinancing a Czech mortgage lists the steps of a move. Our article on when refinancing pays off gives the cost side.

Early repayment: what is free

The rules on repaying early matter as soon as rates move. A borrower may repay at any time, and some repayments are free.

Free repayment also applies on the death, long-term illness or disability of a borrower where it reduces ability to repay, and, for loans agreed or refixed from 1 September 2024, when the property is sold at least two years after purchase and when joint marital property is settled after a divorce (check the consolidated text). For loans under the older regime, a charge on repayment after a sale was capped at 1% and CZK 50,000. Our guide to early repayment of a Czech mortgage covers the rules, and selling a flat with a mortgage covers the sale case.

One trap: some banks offer to book a future rate in advance, a forward rate, and in exchange ask the borrower to give up rights such as free repayment. Read what you sign, and take the question to a mortgage adviser if the terms are not clear.

When rates fall

A falling cycle raises a different question: should a borrower on a fixed rate act? The loan cannot be repaid for free at any moment, so the practical choices are limited to the windows the rules give. At the end of the fixation the borrower can refinance at no charge. Once a year, in the month before the contract anniversary, up to 25% of the loan can be repaid without a fee. Otherwise, early repayment may carry the lender's reasonable costs, within limits set by the Consumer Credit Act (as of 2026; check the consolidated text or ask the bank). Whether a refinancing pays depends on the difference in rate, the balance, the time left and the costs of moving, as our article on when refinancing pays off shows.

Reading the news with this in mind

When the central bank changes its rate, ask four questions in order.

1. Was it expected? If so, offers have probably moved already.
2. Is my rate fixed? If yes, nothing happens until my reset date.
3. When is my reset? That is the date my payment becomes a new number.
4. What is my bank offering today for the length I would choose? That is the real answer.

The disputes that follow a reset, such as misdescribed charges, go to the financial arbiter for out-of-court resolution, and lenders must give a standard information sheet and state the annual percentage rate of charge.

Frequently asked questions

Does my payment change when the ČNB changes the repo rate?

If your rate is fixed, no, until the fixation ends. On a loan with no fixed rate or a short one, it can change soon, according to your contract.

Can I leave my bank when my fixation ends?

Yes. Repayment at the end of a fixation is free, so you can refinance with another lender.

Can I repay part of my mortgage early?

Yes. A part of up to 25% of the loan can be repaid free once a year in the month before the contract anniversary. Other early repayments may carry the lender's reasonable costs, within limits set by the Consumer Credit Act (as of 2026; check the consolidated text or ask the bank).

Who handles disputes with my bank?

The financial arbiter handles out-of-court disputes between consumers and financial institutions.

A practical next step

Find the reset date on your loan and write down the balance that will be re-priced. Then calculate the payment at three rates: one lower, one equal, one higher. The result is your exposure, and the answer to the question "what does the central bank do to me?"

This is a general explainer, not legal, tax or mortgage advice.