remaining debt

Outstanding Balance - The outstanding balance is the amount of a mortgage loan that has not yet been repaid after the agreed fixed-rate period has expired and for which a follow-up loan is required.

How is the outstanding balance determined, and how is it calculated?

In most mortgage financing arrangements in Germany, the loan is not repaid in full within a single fixed-rate period. The monthly payment - known as the annuity - consists of an interest portion and a principal portion. Since the interest portion is calculated based on the remaining loan balance, it decreases with each payment, while the principal portion increases accordingly. This progression is reflected in the amortization schedule.

The amount of the remaining debt at the end of the fixed-rate period depends on several factors. The initial repayment rate is the most important factor: For a loan of 300,000 euros with a 2 percent interest rate and a 2 percent initial repayment rate, the remaining debt after ten years is still around 233,000 euros. If the initial repayment is increased to 3 percent, the remaining debt drops to about 199,000 euros-a difference of over 34,000 euros.

Another influencing factor is extra payments. Most loan agreements allow for annual extra payments of 5 to 10 percent of the original loan amount without incurring a prepayment penalty. Those who consistently take advantage of this option can significantly reduce the remaining debt. The interest rate itself also influences the remaining debt: With lower interest rates, a larger portion of the same monthly payment goes toward principal, so the remaining debt decreases more quickly.

The remaining debt can be precisely calculated using a repayment calculator. We recommend knowing the estimated remaining debt as soon as the financing is finalized and checking it regularly so you can plan your follow-up financing in a timely manner.

Risks Associated with High Remaining Debt

A high remaining debt carries an interest rate risk. If the general interest rate level rises significantly by the end of the fixed-rate period, the follow-up financing will become noticeably more expensive. With a remaining debt of 250,000 euros, an interest rate increase from 2 to 4 percent means an additional monthly burden of around 415 euros-just for the interest portion.

Another risk arises if the property’s value has fallen by the time refinancing is due. If the market value is below the remaining debt, refinancing becomes more difficult or is only available on less favorable terms-because the bank considers the loan-to-value ratio to be too high. In markets with strong price fluctuations, such as the Nuremberg metropolitan region after 2022, this risk became a tangible reality: Those who financed at peak prices in 2021 found themselves facing lower property valuations and higher interest rates in 2023-2024.

This risk can be mitigated through several strategies: Choose the highest possible initial principal repayment, consistently take full advantage of agreed-upon special repayment rights, and, if interest rates are expected to rise, secure a forward loan early on to lock in the follow-up interest rate. Full repayment within the fixed-rate period-with correspondingly high payments-also completely eliminates the residual debt risk.

Strategies for Reducing Residual Debt

In addition to higher regular repayments and special repayments, there are other ways to actively manage residual debt. Those who simultaneously build up a home savings loan systematically accumulate capital that can be used at the end of the fixed-rate period to partially pay off the remaining debt. This strategy is particularly worthwhile when interest on home savings balances is higher than the interest on the debt-which tends to be the case again in the current interest rate landscape (2025/2026).

A change in repayment terms during the fixed-rate period is possible once or multiple times under some loan agreements. If you receive a pay raise after a few years, you can increase your repayments and thus significantly reduce the remaining debt by the end of the term. Combining two loans with different fixed-rate periods-for example, 10 and 15 years-also allows for staggered refinancing and reduces interest rate risk.

Follow-up Financing: Planning Is Key

Follow-up financing should not be addressed only shortly before the fixed-rate period expires. Forward loans can be arranged up to 60 months in advance; the bank guarantees the current interest rate for the later start date in exchange for a small interest premium. In an environment of rising interest rates, a forward loan can help avoid significant additional costs.

We recommend obtaining at least three offers no later than twelve months before the fixed-rate period expires-from your primary bank, another branch bank, and an independent mortgage broker. The terms can vary significantly. Renewing with your current lender is often more convenient, but it is not always the most favorable offer.

Practical Tip for Nuremberg and Franconia

Real estate prices in the Nuremberg metropolitan region have risen significantly in recent years, leading to higher loan amounts for many financing arrangements and thus potentially higher remaining debt. We recommend that buyers in sought-after locations such as Erlenstegen, St. Johannis, or Nuremberg’s Südstadt agree to an initial repayment of at least 3 percent when securing their first mortgage and take full advantage of all available special repayment options.

In the slightly more affordable outlying areas and the surrounding Franconian region-such as Fürth, Erlangen, or the Nuremberg countryside-the remaining debt can be effectively managed with a moderate purchase price and consistent extra payments. Those who know their remaining debt, plan their follow-up financing in a timely manner, and use interest rate hedging instruments can avoid unpleasant surprises and protect the long-term sustainability of their financing.

Frequently Asked Questions

How can I calculate my remaining debt?

The simplest method is an online repayment calculator, into which you enter the loan amount, interest rate, initial repayment, and fixed-rate period. Alternatively, your bank’s repayment schedule will show the remaining debt for each year of the fixed-rate period. Extra payments are only taken into account if they have already been made or are already planned. We recommend updating the calculation annually.

What happens to the remaining debt after the fixed-rate period ends?

The remaining debt does not disappear-it must continue to be repaid. The borrower has three options: a renewal with the current bank, a refinancing with a more favorable provider, or full repayment using personal funds. If no follow-up financing is arranged, the bank’s variable interest rate applies, which is typically significantly higher.

Is it worth making higher principal payments to reduce the remaining debt?

Yes, in the vast majority of cases. A higher initial principal payment not only reduces the remaining debt but also significantly lowers the total interest burden over the term of the loan. For a loan of 300,000 euros at 2 percent interest, increasing the repayment rate from 2 to 3 percent over ten years saves around 15,000 euros in interest. The additional monthly payment amounts to only about 250 euros.

When should I start looking into refinancing?

We recommend taking action no later than 12-18 months before the fixed-rate period expires. During this time, you can obtain, compare, and review multiple offers. If you want to take out a forward loan, you have up to 60 months to prepare. The closer the end of the fixed-rate period gets, the weaker your negotiating position with the bank becomes-so act early. Forward-looking planning is crucial, especially when you have a high remaining debt and interest rates are rising.

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