NBS mortgage rules will separate first homes from additional properties
From 1 January 2027, Slovakia’s National Bank will introduce phased changes to mortgage loan-to-value limits. The key distinction will be whether the loan finances a first home, a typical purchase, or a third and subsequent property.
What the NBS decision changes
The National Bank of Slovakia is changing the maximum share of a property’s value that may be financed through a mortgage—the loan-to-value, or LTV, limit. The new rules take effect on 1 January 2027, with a gradual rollout that gives banks time to implement processes such as checking how many properties a borrower owns. People aged up to 35 who are buying or building their first home may obtain financing of up to 90% of the property’s value.
For most other applicants, the basic LTV limit remains 80%, although banks may continue to provide part of their lending with financing of up to 90% of the property value. Financing for a third and subsequent property will be subject to a 70% limit. The change therefore does not create one universal mortgage limit.
The applicable framework depends partly on the purpose of the purchase and the borrower’s existing property ownership.
iNSTRID model calculation
Under a model assumption of a 150,000 EUR loan over 30 years, an annuity repayment and a hypothetical interest rate — which is neither a bank offer nor a current market rate — the payment works out as below. These are an iNSTRID calculation, not a figure from the source, and a change in the ECB policy rate does not translate one-to-one into a mortgage rate.
| Scenario | Model rate | Monthly payment | Δ vs. base / month | Δ vs. base / year | | --- | --- | --- | --- | --- | | Scenario A (favourable) | 3.50 % | 673.57 EUR | −42.55 EUR | −510.60 EUR | | Scenario B (base) | 4.00 % | 716.12 EUR | 0.00 EUR | 0.00 EUR | | Scenario C (stress) | 4.50 % | 760.03 EUR | +43.91 EUR | +526.92 EUR |
Model assumptions: loan 150,000 EUR, 30-year term, annuity repayment, hypothetical rate. The actual rate, fees and approval depend on the bank and the individual applicant.
Why the distinction matters for your own funds
The LTV limit directly affects how much of the property value must come from sources other than the mortgage. A lower permitted LTV means a larger equity requirement, all else being equal. For a first-home buyer under 35, the NBS announcement says financing may reach 90% of the property’s value.
For a third or subsequent property, the stated limit is 70%. That difference can materially change the amount of cash that must be available before the purchase can proceed. However, the NBS rule is a financing limit, not a promise that a bank will approve a particular loan.
The source does not establish an individual borrower’s income limit, affordability assessment, valuation, interest rate, fees or final lending decision. Those details must be checked separately with the lender.
The iNSTRID mortgage model: test the payment, not just the LTV
iNSTRID’s accompanying model illustrates how sensitive a long-term mortgage payment can be to the assumed interest rate. It uses a hypothetical loan amount and term, an annuity repayment structure and three hypothetical rate scenarios. The figures are iNSTRID calculations, not NBS data, a bank offer or a current market-rate forecast.
Use the inserted model table to compare the favourable, base and stress scenarios. The practical question is not only whether the planned loan fits the permitted LTV. It is also whether the household budget remains workable if the modelled rate is higher than the base assumption.
This is a model sensitivity test, not a prediction of future mortgage rates. A change in an official interest-rate environment would not automatically translate one-for-one into the rate offered on an individual mortgage.
What the two sources do—and do not—establish
The NBS source sets out a Slovak mortgage LTV change: first-home buyers under 35 may qualify for up to 90% financing, most other applicants remain under an 80% basic limit with some lending potentially reaching 90%, and third or later properties face a 70% limit from 2027. The ECB Working Paper supplied as additional context examines Austrian corporate loan moratoria, participation and investment effects—not Slovak residential mortgage LTV rules. Taken together, the sources support separating the Slovak regulatory event from unrelated evidence about corporate borrowing; the ECB paper does not show how Slovak banks will apply the NBS mortgage limits.
The NBS announcement says the change reflects developments in the housing market, including a rising share of buyers who already own property, and that every fifth mortgage currently goes to a client with at least two properties. It also states that the aim is to distinguish people arranging housing for themselves from those buying additional properties as investments. What does not follow from the announcement is that every first-home buyer will receive 90% financing, that every additional-property purchase will be refused above 70% LTV, or that property prices, rents or mortgage rates will move in a particular direction.
A practical preparation checklist
Before relying on the new limits, separate the regulatory question from the affordability question: 1. Classify the purchase. Establish whether it is your first home, another property, or a third or later property, and document the ownership position the bank will need to verify.
2. Calculate the required equity. Test the purchase under the relevant LTV limit and include a buffer for the possibility that the bank’s valuation differs from the agreed purchase price.
3. Stress-test the repayment. Use the iNSTRID model to compare the base and higher-rate scenarios rather than assessing the mortgage only at one assumed rate.
4. Ask the lender what is separately assessed. Confirm how income, existing debts, property valuation, ownership records and the bank’s available lending capacity affect the actual application.
5. For an investment purchase, model the full costs. Do not treat rent as a guaranteed offset to the mortgage payment; account separately for operating costs, maintenance, insurance, taxes, fees and vacancies where relevant.
The examples and calculations are illustrative and do not replace mortgage, financial or investment advice.
Key takeaways and FAQs
When do the new NBS mortgage rules start?
The NBS says the changes will start on 1 January 2027 and will be introduced gradually so banks can implement the required processes.
Can a first-home buyer under 35 get a 90% mortgage automatically?
No. The NBS announcement says such buyers may obtain financing of up to 90% of the property’s value. It does not guarantee approval for an individual borrower, because the bank’s full assessment still applies.
What LTV limit applies to a third property?
The NBS states that financing for a third and subsequent property will be subject to a 70% limit.
Are the iNSTRID repayment scenarios bank offers?
No. They are hypothetical iNSTRID calculations based on the stated model assumptions. They are intended for sensitivity analysis, not as current market rates or lending offers.
What to take away
The main practical effect of the NBS announcement is a clearer separation between financing a first home and financing additional properties. Buyers should identify which category applies, calculate the equity required under the relevant LTV framework and test repayment affordability under more than one rate assumption. The rule sets a regulatory ceiling; it does not determine the outcome of an individual mortgage application.
Recalculate this with your own numbers — real loan, rate and fixation — in the iNSTRID Purchase Time tool.
This article is informational and does not replace financial, investment or mortgage advice.
