For housing, and for sums from a few hundred thousand koruna upwards, a mortgage is almost always cheaper than a personal (consumer) loan: the rate is lower, and on your own home the interest is tax-deductible. A consumer loan wins on speed, needs no collateral, and the law gives you 14 days after signing to withdraw from it. For smaller sums repaid quickly, it also spares you the valuation and the land registry fees.
What really decides, though, is how long you take to repay. A mortgage stretched over 15 years can cost more in interest than a dearer loan cleared in seven. Below are the differences the offers don't show, with the sums worked out for CZK 1,000,000.
Is a mortgage or a personal loan cheaper?
For housing and amounts from a few hundred thousand crowns upwards, a mortgage, that is a mortgage loan secured by a lien on property, comes out cheaper. A loan without collateral wins on speed and for small amounts repaid within a few years.
| Mortgage (housing loan with a lien) | Consumer loan | |
|---|---|---|
| Security | lien on the property, recorded in the land registry (katastr) | usually none |
| Rate in October 2026 | new mortgages average 5.00 % (ČBA, August) | considerably higher, depending on the bank and your credit profile |
| Typical repayment period | 5–30 years | up to 10 years |
| Processing | weeks: valuation, contracts, registration in the land registry | days |
| Before signing | 14 days to think it over; the bank may not change its offer | no such period |
| After signing | no right to withdraw without giving a reason | withdrawal within 14 days, no reason needed |
| Early repayment | free in the month before the anniversary up to 25 %, and at the end of the fixation; otherwise 0.25 % per year until the fixation ends, max. 1 % | at any time; compensation of at most 1 %, or 0.5 % if no more than a year of the loan remains |
| Interest tax deduction | yes, for your own home, up to CZK 150,000 a year | no |
Why does Czech law protect each loan differently?
The Consumer Credit Act puts the protection for a mortgage and for an ordinary loan at opposite ends. With a mortgage you get time before signing: 14 days to think it over, during which the bank may neither change nor withdraw its offer (§ 111). Once you have signed, you cannot simply walk away without a reason. With a consumer loan it works the other way round. You sign straight away, but within 14 days of concluding the contract you can withdraw without giving a reason and without penalty (§ 118).
One exception catches people out. An unsecured loan for a housing co-operative share or for alterations to a building (a larger renovation, say) counts as a housing loan under § 2 of the Consumer Credit Act, even though nobody calls it a mortgage, so there is no right to withdraw after signing.
Early repayment is simpler with a consumer loan. You can repay it at any time, and the lender may ask for no more than 1 % of the amount repaid, or 0.5 % if no more than a year of the loan remains. With a mortgage the fee is tied to the end of the fixation, with free windows in between. The details are in When to repay a mortgage early.
Is there a mortgage without collateral?
No. A mortgage is by definition a loan secured by a lien on property, entered in the land registry (katastr). Without the lien it is not a mortgage, whatever the product is called.
Banks do offer unsecured “housing loans” and “renovation loans”. They are usually personal (consumer) loans with a higher rate and a shorter term: you can withdraw within 14 days of signing without giving a reason, and repaying early costs at most 1 % of the amount, or 0.5 % if no more than a year of the loan is left. The exception, an unsecured loan for a co-operative share or for alterations to a building, is described in the previous section.
A million for a renovation, three ways
Running the numbers: renovating your own flat for CZK 1,000,000. The consumer loan rate of 8.50 % is an assumption; the mortgage is at the average 5.00 %. Annuity payments:
- Consumer loan over 7 years: payment CZK 15,836, total interest CZK 330,300.
- Mortgage over 7 years: payment CZK 14,134, interest CZK 187,200, plus around CZK 7,000 for the valuation and lien registration. At a 15 % tax rate the interest deduction gives back up to CZK 28,100, provided the interest fits within the annual cap.
- Mortgage over 15 years: payment CZK 7,908, but interest of CZK 423,400, more than with the dearer consumer loan.
Over the same period the mortgage saves more than CZK 140,000 in interest. Stretched to twice the length, it loses that advantage.
If you already have a mortgage, the simplest route is often to increase it with your current bank to cover the renovation, which saves time and some of the fees. The smaller the amount, the more a mortgage's fixed costs weigh. Where the break-even point lies is worked out in Small mortgage under CZK 1 million.
When a mortgage is the better choice
- You are buying, building or renovating your own home, and the sum runs to hundreds of thousands or more.
- The payment on a consumer loan would be too high for your budget, and a longer term brings it down.
- You have a property you can pledge and don't mind waiting a few weeks.
- You pay income tax and will use the interest deduction.
The lower rate comes at a price in risk. A mortgage is secured on your home, so if you stop paying for a long time the bank can sell the pledged property. A consumer lender has no such security and has to recover the debt in other ways. With a mortgage, therefore, set the term so that the payment stays manageable even at a rate 1 pp higher after the fixation ends, and keep a cushion for several payments. What the bank wants from you for a mortgage, from the deposit to documents, is set out in our first-time buyer guide.
When a consumer loan is the better choice
- You need a smaller sum and will repay it within a few years.
- The money has to arrive within a week, for an emergency repair or a tradesman's deposit, for example.
- You cannot or do not want to pledge property, perhaps because you rent or live in a co-operative flat.
- You expect to clear the debt soon from other money. Compensation for early repayment is capped, and arranging the loan costs nothing extra.
For a purpose unrelated to housing there is also the American mortgage, a non-purpose loan secured on property. When it makes sense is covered in American mortgage.
Sources
- Act No. 257/2016 Coll., on consumer credit, § 111 (reflection period), § 117 (early repayment), § 118 (withdrawal from a credit agreement other than for housing)
- Consumer Credit Act, Title III – early repayment and withdrawal (wording from 1 Sept 2024)
- Act No. 586/1992 Coll., on income taxes, § 15(3) (interest deduction, CZK 150,000 cap)
- ČBA Hypomonitor – average rate on new mortgages, August 2026