Joint mortgages in Czechia: couples, spouses and co-borrowers

A couple applying for a mortgage together usually think of it as a sum: his income plus hers, one flat, one loan. The bank sees something else. It sees two people, each of whom can be asked to repay everything. That difference rarely matters while the instalments are paid. It matters a great deal when one borrower loses a job, moves abroad or leaves the relationship.

This guide explains how joint mortgages work in Czechia, who can borrow together and what each borrower takes on. It is general information. Each bank sets its own conditions, and the contract in front of you decides.

Who can borrow together

Banks accept several combinations. Spouses are the standard case. Unmarried partners can borrow together too, as can partners in a registered or converted partnership. Parents sometimes join a child's application to increase the income, and siblings or friends occasionally do the same. Each bank has a view on how many people it will put on one loan, and on whether it accepts co-borrowers who do not own the property.

The ownership and the loan are two separate questions. If you are buying together, the form of ownership (joint marital property or shares) comes first, as we explain in buying a flat with a partner. The bank then decides who must be a borrower. A bank will normally want every owner of the mortgaged flat to be involved in the loan, either as a borrower or in another capacity that binds them.

What joint and several liability means

A Czech joint mortgage is normally a debt of all co-borrowers together and each of them separately (solidární dluh). The bank may demand the whole amount from either borrower. It does not have to ask each for half. If one stops paying, the bank can turn to the other for the full instalment, and in the end for the full balance.

Between the two of you, the one who pays more has a claim on the other for the excess. That claim is a private matter between you, and the bank does not enforce it. A couple that agrees to split the instalment equally has not changed the bank's rights, only their own.

How banks assess two applicants

The bank adds the incomes of all borrowers and the obligations of all borrowers. It looks at each person's stability: how long they have worked in the current job, what type of contract they have, and whether any income is variable or foreign. A strong income does not entirely cover for a weak one, because the bank wants both borrowers to be able to repay in the event the other cannot, and sometimes puts less weight on income from a borrower with a short history.

The central bank's recommendation on loan-to-value (LTV) applies to the loan as a whole: a maximum of 80% of the property value, or 90% for applicants under 36, with the income-based limits (DTI and DSTI) switched off (as of 2026; check ČNB). Whether the higher limit applies when only one co-borrower is under 36 is something banks handle differently, so ask each lender in writing. Our guides to how much you can borrow and how much deposit you need explain the general framework. To get a rough range for two incomes, you can use the borrowing estimator on Hypoteky.com.

Existing debts count against the application. A credit card limit, a consumer loan, a car lease or a debt of one partner reduces the amount the bank will lend to both. Both borrowers' credit records are checked in the bank and non-bank credit registers, and a poor history for one partner affects the joint file.

Spouses: the extra layer

When the flat is bought into the joint marital property (SJM), the bank will usually require both spouses to be parties to the loan. Even when only one spouse earns the income and applies as the borrower, the other typically has to give consent or sign as a co-borrower, because the property and the debt may fall into the SJM. This is routine, not a sign of distrust. Spouses who have a marital property contract excluding the flat from the SJM should show it to the bank early, because it changes who needs to sign.

Foreign couples should say where they married and under what regime. The bank, or the notary, may ask for documents on the marriage and the property regime, and may ask for certified translations. See our guide to mortgages for foreigners.

One tax deduction for the whole household

Interest on a housing loan can be deducted from the income tax base, but the cap belongs to the household, not to each borrower. For housing acquired from 2021 the limit is CZK 150,000 of interest a year for all members of a shared household together, and CZK 300,000 where the housing was acquired earlier (as of 2026; check the Financial Administration). Where several adults are parties to the loan, the law splits the deduction between them in equal parts; spouses may instead let one of them claim the whole amount (as of 2026; check the Financial Administration). Each needs the lender's annual confirmation of interest paid. The deduction lowers the tax base, not the tax, so at the 15% rate the most it can save a household is about CZK 22,500 a year.

When something goes wrong

The scenarios worth thinking through before you sign are four.

Job loss or illness. One income falls and the other cannot carry the instalment alone. Talk to the bank before you miss a payment. Banks offer temporary arrangements such as a payment holiday or a longer term, at their discretion. Our article on mortgage insurance and life cover covers cover against these events.

Death or long-term disability of a borrower. The law gives the borrower a right to repay early without a charge on death, long-term illness or disability of a borrower or co-borrower, where the event reduces the ability to repay (as of 2026; check ČNB and the contract). The survivor is still liable for the loan.

Separation. Splitting up does not release anyone from the bank. If you want one borrower to leave the contract, the bank has to agree to the change, and it will test whether the remaining borrower can carry the loan alone. In practice that often means refinancing. For couples who divorce, since 1 September 2024 early repayment in connection with the settlement of the joint marital property is free (as of 2026; check the contract and ČNB). Our explainer on early repayment lists the rules, and refinancing covers the other route.

Sale. If both owners want to sell, the mortgage is repaid from the proceeds. Since September 2024, early repayment on a sale at least two years after purchase is free for loans agreed or refixed since then (as of 2026; check ČNB). Our guide to selling a flat with a mortgage explains the sequence.

Frequently asked questions

Frequently asked questions

Is each co-borrower responsible for half?

No. Each is liable to the bank for the whole debt. Any 50/50 arrangement exists only between you.

Can unmarried partners get a joint mortgage?

Yes. Banks accept unmarried partners as co-borrowers, usually if they are both owners of the flat.

Can my name be taken off the mortgage after a breakup?

Only with the bank's agreement. It will assess whether the other borrower can carry the loan alone, and may require refinancing.

Does a parent co-borrower help a first-time buyer?

It can raise the income the bank counts, but the parent becomes liable for the debt. Think about their retirement and their own borrowing.

A practical next step

Ask your bank or broker for a written list of what it requires from each borrower, and what happens to the loan if one of you leaves. For a broader orientation on a first loan, the first-mortgage guide on Hypoteky.com sets out the stages. Then keep your own paper: a one-page agreement on who pays what.

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