Converting a mortgage loan into an income-generating loan

The key elements of the move are: financing, taxation, bank negotiations, and tax return corrections - to take advantage of the tax benefits of an income-generating loan.
Tips for landlords
21.02.2025

The tax deduction for interest on home loans has effectively disappeared. For many people who own their own home or use it for private housing, this restriction is a significant financial factor. This change can significantly reduce your taxable income if you own more than one home, are starting out in property investment or are a landlord.

When the purpose of the loan is changed to an income-generating loan, all interest expenses on the loan become fully tax deductible. This change allows for a full tax benefit, which reduces taxable income and significantly improves cash flow. Such a solution is particularly important for housing investors and landlords as it helps to optimise financing costs and increase the return on investment.

In this guide, we go through essential background information and basic concepts, such as the differences between a mortgage and an income-generating loan, the key elements of loan terms and financing (repayment period, instalments, Euribor rate, margin and collateral) and tax aspects. The guide also explains why the correct disclosure of the purpose of the loan on the tax return is crucial for achieving the full tax benefit.

1. Background and basic concepts

Mortgage loan vs. income-generating loan

Traditional mortgages have often been taken out for owner-occupation, thus eliminating their tax deductibility altogether. This means that interest costs on owner-occupied loans are no longer tax deductible, which limits the tax benefits and can reduce overall cash flow. In contrast, an income-generating loan is designed to generate taxable income - for example, renting an investment property - in which case all interest costs on the loan are tax deductible, allowing for full tax benefits. Therefore, declaring the correct purpose on the tax return is crucial to ensure that the full benefit of the interest on the loan is received for tax purposes.

Loan terms and financing

The terms of the loan include, among other things:

  • Loan term and instalments: how long the loan will be repaid and how the instalments will be spread.
  • Euribor rate and margin: the Euribor rate determines the reference rate for the loan, to which the bank adds its own customer-specific margin. The combined effect of the two is the nominal interest rate on the loan, which directly affects the total cost of the loan.
  • Collateral: Collateral plays an important role in the granting of a loan. Good collateral, such as a high level of ownership or other security arrangements, can lead to better loan terms and lower margins.

Taxation and tax deductions

For tax purposes, the decisive factor is the purpose for which the loan is used:

  • Tax deductibility: the deduction for interest on a loan used to finance your own home has been completely abolished, which means that there are no longer any tax benefits for financing your own home. In contrast, interest costs on loans for investment housing or other income-generating activities are 100% deductible, provided the loan is properly classified as an income-generating loan.
  • Interest deductions: a properly marked loan allows all interest expenses on the loan to be deducted from capital income, reducing taxable income and improving cash flow.
  • Correction requests: if the bank does not correctly indicate the purpose of the loan on the pre-completed tax return (for example, if the loan is incorrectly recorded as "other debt"), it is necessary to file a correction request. This will ensure that the tax deductions are fully realised.

2. Current tax changes and purpose of the loan

Recent tax updates have a direct impact on the tax benefits of converting a mortgage into an income-generating loan. In particular, these changes highlight the fact that the deductibility of interest on loans used for owner-occupied housing has been eliminated, and in order to receive the full tax benefit, the loan must be converted into an income-producing loan.

Abolition of the interest deduction for single-family houses

The interest deduction on loans for owner-occupied dwellings has been completely abolished from the beginning of 2023. This means that interest expenses on owner-occupied home loans will no longer be tax deductible. If the loan remains a conventional mortgage, the tax benefit will be very limited, which will significantly reduce cash flow. Changing the purpose of the loan to an income generating loan ensures that all interest costs are deductible.

Full tax deduction for interest on an income-generating loan

In the case of income-generating loans used to finance investment housing, all interest expenses are tax deductible. This means that the total cost of the loan is reduced for tax purposes when the loan is properly declared as an income loan on the tax return. Full deductibility offers a significant advantage over allowing deductions for only part of the interest costs.

Updates to pre-completed tax returns and reporting methods

Nowadays, the deadlines for tax returns have been brought forward and pre-completed tax returns are arriving earlier than before. This allows for faster detection and correction of incorrect information, such as misreporting of the purpose of the loan. Ensuring correct information is crucial to ensure that tax deductions are fully realised.

Changes to the limits of the household allowance

Under the new rules, the maximum amount of the household allowance has been lowered to €1,600 per person and the deductible has been raised to €150. These changes will have a particular impact on situations where you carry out renovations or other household services to support your rental business. The change in limits highlights the importance of allocating costs correctly to maximise the tax advantage in generating income.

Exclusion of first-time buyer benefits

The tax exemption for first-time buyers will be abolished between 2024 and 2025. This development makes it clear that the purpose of the loan must be clearly defined in order to obtain tax benefits. If the loan is converted into an income-generating loan, the interest deductibility of the loan will remain full - which is particularly important when first-time homebuyers' benefits no longer provide additional benefits.

The above tax changes have a direct impact on how a change in the purpose of a loan can bring full tax benefits, improve the profitability of the investment and strengthen cash flow. Properly implemented, the change will allow for a reduction in all interest costs on the loan, making it an attractive solution for home investors and landlords.

3. Practical advice on the change of use of the loan

Before the change - preparation and data collection

  • Check the current loan terms: go through all the loan documents and check the repayment period, instalments, Euribor rate, margin and collateral.
  • Gather the necessary information: find out what the loan was originally taken out for (for example, to buy your own home) and how it will be used (for example, for investment or rental purposes).

Bank negotiations - discussion and planning for change

  • Contact your bank: schedule a meeting and set out your plans clearly - explain that you intend to convert your home into a rental property and so the loan needs to be converted into an income-generating loan.
  • Present your plan: highlight the tax advantages and ask the bank to provide the necessary documents, such as a copy of the lease or other relevant documentation.
  • Ask for further guidance: find out what further clarification the bank requires to ensure that the purpose of the loan can be officially changed.

Reporting the change on the tax return

  • Check the bank's declarations: make sure that the bank correctly declares the purpose of your loan on your pre-completed tax return (under the heading "income-generating loan").
  • If necessary, make a claim for adjustment: if the purpose of the loan has been incorrectly stated, act quickly and make a claim for adjustment to the tax authorities either in MyTax or in writing.
  • Use the calculators on the tax card: make sure the tax rate and any deficit credits are correctly taken into account so that the tax benefits are fully realised.

4. Concrete examples and calculations

Case study - Conversion of a detached house into an investment dwelling

Let's imagine a situation where a homeowner who has been living in his own home decides to convert it into a rental investment property. In this case, the purpose of the loan must be changed to an income-generating loan so that all interest expenses on the loan are tax deductible.

Calculation before the change

Loan details:

  • Loan amount: €150 000
  • Loan period: 25 years
  • Nominal interest rate (Euribor + margin): 3.5%
  • Monthly instalment: approx. €750

Tax deduction before the change:
Since the deduction for interest on a loan used for your own home has been abolished, you will not receive a tax benefit on the interest on the loan.

  • Total annual interest: €150 000 * 3.5% = €5 250
  • Deductible amount: €0 per year

Calculation after change

The details of the loan remain the same, but the purpose is changed to an income-generating loan.

  • Tax deduction after the change: all interest expenses on a loan are now deductible, i.e. the annual deductible amount is €5 250.

Summary of calculations

  • Before the change: tax-deductible interest is €0 per year.
  • After the change: tax-deductible interest will be €5 250 per year, which will significantly improve the tax benefits and reduce the tax burden.

This example illustrates how the situation changes dramatically when the purpose of a loan is changed to an income-generating loan. This change has a full tax benefit as all interest expenses are deducted, improving the financial profitability and cash flow of the investment.

5. Technical details of the loan conditions

To understand the total cost of a mortgage, it is important to familiarise yourself with the technical details of the loan terms. In this section, we will go through the key terms that affect the price and instalments of the loan.

Loan margin

The loan margin is the bank's own mark-up added to the loan's reference rate. It is customer-specific and influenced by a number of factors, including:

  • Collateral: better collateral, such as a higher proportion of ownership compared to the value of the home, can lead to a lower margin.
  • Solvency and financial situation: good solvency and a strong financial situation negotiate a more favourable margin.
  • Quality of relationship: a long-term and reliable relationship can bring lower margins because the bank sees the customer's risk as lower.

For example, if the reference rate is 1.5% and the bank charges a margin of 0.6%, the real interest rate on a loan is 2.1%. Bank margins can vary significantly, so it is important to compete.

The role of reference rates

The reference rate is the base rate set by the market, to which the bank adds its margin. In Finland, the commonly used reference rate is the 12-month Euribor, but shorter options such as 3-month and 6-month Euribor are also available.

  • 12-month Euribor: offers predictability as the interest rate remains the same for a year, making budgeting easier.
  • Shorter reference periods (3 months, 6 months): respond more quickly to changes in market interest rates and can be lower, but their speed of fluctuation can cause larger changes in monthly instalments.

The choice of the length of the reference rate depends on the borrower's risk tolerance and the importance of predictability compared to the potential savings.

Interest rate hedging options

Interest rate hedging aims to ensure that the interest cost of a loan remains under control, even if market interest rates rise. The main forms of interest rate hedging are:

  • Fixed rate: fixes the interest rate for a certain period of time, so that the loan instalments remain predictable. A fixed rate is usually slightly higher than a variable rate, but it protects against interest rate rises.
  • Interest rate cap: defines the maximum and minimum interest rate on a loan for a given period. This provides both an upper and lower limit within which the reference rate can vary.
  • Interest rate cap: limits the maximum interest rate on a loan, even if market interest rates rise. The advantage of an interest rate cap is that the monthly repayment does not exceed a certain limit, which provides financial security.

The cost of interest rate hedging is often added to the margin of the loan and therefore affects the annual percentage rate of the loan. It is therefore important to assess when it makes economic sense to use interest rate hedging.

Total cost of the loan and annual percentage rate of charge

The Annual Percentage Rate (APR) of a loan consists of the reference rate, the margin and other loan-related charges such as origination fees and loan servicing fees. The APR gives a comprehensive picture of the cost of the loan and is the best point of comparison between different loan offers.

For example, if the loan is tied to a 12-month Euribor rate of 1.5% and the bank's margin is 0.6%, the nominal interest rate on the loan is 2.1%. Additional charges, such as opening and account management fees, increase this percentage slightly, and the final annual percentage rate could be, for example, 2.3-2.5%.

Summary of technical loan conditions

By understanding the impact of the loan margin, reference rates and interest rate hedging, you can better assess which loan offer is most advantageous for you. It is advisable to compare offers from several banks and negotiate favourable terms to keep the overall cost as low as possible.

6. FAQ - Frequently asked questions

  1. Why and when should the purpose of the loan be changed?
    The purpose of the loan should be changed when the use of the dwelling changes, for example, from an owner-occupied dwelling to a rental investment dwelling. This change allows for a full deduction of interest expenses and improves tax advantages.
  2. How do bank negotiations work in practice?
    First, you contact your bank and set out your plans clearly. Discuss your current loan terms, the documents you need (e.g. a lease) and the implications of the change. This will allow the bank to make the necessary changes to the purpose of the loan.
  3. What to do if the purpose of the loan is incorrectly indicated on the tax return
    If the purpose of the loan is incorrectly indicated on the pre-completed tax return, it is important to submit a correction request to the tax authorities either in MyTax or in writing to ensure that the correct deductibility is taken into account.
  4. How do tax deductions affect the total cost of ownership?
    When a loan is converted into an income-generating loan, all interest costs are tax deductible, reducing taxable capital gains and improving cash flow. This has a direct impact on the total cost of the loan and the return on investment.
  5. What are the risks and challenges in implementing the change?
    Challenges can include requests for further clarification from the bank, incorrect information on the pre-completed tax return and delays in the adjustment claim process. With careful preparation and documentation, these risks can be minimised.
  6. Does a change in the purpose of the loan affect the terms of the loan, such as interest rates or the duration of the loan?
    In general, a change in the purpose of the loan does not directly change the terms of the loan, such as interest rates or the duration of the loan, but primarily improves the tax benefits. However, additional clarifications may arise during bank negotiations and should be taken into account.

7. Summary and recommendations for action

In summary, the conversion of a mortgage loan into an income-generating loan offers significant tax advantages when the loan is used for investment or rental purposes. The conversion makes all interest expenses on the loan tax deductible, which improves the economic viability of the investment and enhances cash flow. In addition, reporting the correct use on the tax return will ensure that the tax benefits are fully realised.

Policy recommendations:

  • Check your current loan terms: make sure you have all the information you need about your current loan, such as repayment period, repayment instalments, Euribor rate, margin and collateral.
  • Contact your bank: present your plans for the change of purpose of the loan and explain what steps and documents are needed to make the change.
  • Make sure your tax return is correctly reported: check that the bank correctly marks your loan on your pre-completed tax return (under the heading "income-generating loan") and, if necessary, make a correction request to correct the incorrect information.
  • Take advantage of expert advice: use the calculators on the tax card and talk to experts to optimise your tax deductions and get the full benefit of the interest costs of the loan.

Now is the time to take action! First, review your situation, talk to your bank and make sure all the steps are in place - so you can take full advantage of the benefits of turning your mortgage into an income-generating loan.

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