Follow-up Financing Calculator
Extend or switch lenders? From balance, two rate offers, repayment rate and switching costs, see payment, interest, remaining debt and the cheaper option.
Prolongation
Refinancing
Recommendation: Refinancing
Savings: €10,040.00
over 10 years fixed rate (incl. refinancing costs of €500.00)
Note: These calculations are for informational purposes only and do not replace professional tax or financial advice. All information without guarantee.
FAQ
Frequently Asked Questions
What is follow-up financing?
Follow-up financing is needed when the fixed-rate period of your mortgage ends but the loan is not fully repaid. You can negotiate new terms with your current bank (prolongation) or switch to another lender.
When should I start planning follow-up financing?
Start 12-36 months before your fixed-rate period ends. This gives you time to compare offers and possibly secure favorable rates via a forward loan if rates are attractive.
Are my entered amounts stored anywhere?
No. All calculations happen exclusively in your browser. Your inputs are never sent to our server or stored. You can safely enter sensitive financial data.
Guide
What is the Follow-up Financing Calculator?
The follow-on financing calculator compares prolongation, refinancing and forward loans for continuing a mortgage after the fixed-rate period ends.
How does the Follow-up Financing Calculator work?
Enter the remaining balance, current rate and new fixed-rate preferences. The calculator compares the total costs of the three options and shows which is cheapest.
Key Data and Facts
Prolongation: extension with the same lender, low effort. Refinancing: switch to another bank, often better conditions. Forward loan: lock in rates up to 60 months ahead.
Step-by-Step Guide
Step 1: Enter your remaining debt after the end of the fixed-interest period (e.g. EUR 180,000). Step 2: Enter the current interest rate of your loan (e.g. 1.8 %). Step 3: Enter the new interest rate for prolongation (your bank's offer) and the market rate for refinancing. Step 4: Choose the desired new fixed-interest period (e.g. 10 years). The calculator compares the monthly installments and total costs of all three options. Example: With EUR 180,000 in remaining debt, prolongation at 3.2 % and refinancing at 2.9 %, you save approx. EUR 5,400 in interest over 10 years through refinancing. However, take into account notary costs and the assignment of the land charge (Grundschuldabtretung) when refinancing.
Calculation Example
For EUR 180,000 remaining debt: prolongation 3.2% = EUR 870/month, refinancing 2.9% = EUR 825/month. Savings from refinancing: approx. EUR 5,400 over 10 years (less ~EUR 1,000 in notary fees).
Sources
Official sources
Calculations are based on applicable German laws and official data:
- Deutsche Bundesbank
- Bundesanstalt für Finanzdienstleistungsaufsicht (BaFin)
- Statistisches Bundesamt (Destatis)
Full methodology at Methodology.
Reviewed by Konstantin Iakovlev · Last updated:
Finance
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