Refinancing Your Mortgage in Germany (Anschlussfinanzierung): Complete Guide

When your mortgage's fixed interest rate period (Zinsbindung) expires, you face one of the most important financial decisions of your homeownership journey. The remaining loan balance doesn't disappear — it needs new financing at a new interest rate. This process is called Anschlussfinanzierung (follow-up financing), and getting it right can save you tens of thousands of euros.

Many homeowners simply accept their existing bank's renewal offer without shopping around, leaving significant money on the table. This guide explains all your options, provides actionable strategies for securing the best rate, and helps you decide which refinancing approach is right for your situation.

Understanding Your Refinancing Situation

Before exploring your options, let's understand the key factors that determine your refinancing terms:

Remaining loan balance (Restschuld): How much you still owe
Current interest rate environment: What rates are available now
Your current financial situation: Has your income changed? SCHUFA improved?
Remaining property value: Has the property appreciated or depreciated?
Current LTV ratio: With principal repayment + appreciation, your LTV is likely much better
Time until expiry: This determines which Forward-Darlehen options are available

The good news: refinancing often puts you in a stronger position than your original mortgage. You've been making payments for years (proving reliability), your LTV has improved through repayment and property appreciation, and you've built a longer SCHUFA history. These factors typically qualify you for better rates.

Option 1: Prolongation — Stay With Your Bank

The simplest path: your current bank sends you a renewal offer (Prolongationsangebot), typically 3-6 months before your Zinsbindung expires. You agree to a new interest rate for another fixed period, sign some paperwork, and continue as before.

Advantages of Prolongation

Minimal paperwork — no new Grundschuld registration needed
No credit check in many cases (bank already knows your history)
Quick process — can be completed in days
No switching costs
Familiar banking relationship continues

Disadvantages of Prolongation

Rarely the cheapest option — banks count on customer inertia
Limited negotiation leverage if you don't have competing offers
You may miss better terms available elsewhere
Bank may not offer the most flexible terms (Sondertilgung, Tilgungswechsel)

Our recommendation: Always get your bank's Prolongation offer, but treat it as a starting point, not the final answer. Use it as a baseline for comparison with other options.

Option 2: Umschuldung — Switch to a Better Bank

Umschuldung means transferring your remaining mortgage balance to a different bank that offers better terms. This is more common than many homeowners realize, and the process is simpler than most people expect.

How Umschuldung Works

Compare refinancing offers from multiple banks (via broker or independently)
Choose the best offer and apply with the new bank
The new bank arranges for the Grundschuld to be transferred (Grundschuldabtretung)
Your old bank transfers the loan balance to the new bank
You begin making payments to the new bank under the new terms
Total switching time: 4-8 weeks

Costs of Switching

The main cost is the Grundschuldabtretung — transferring the existing Grundschuld to the new bank rather than deleting and re-registering it. This costs approximately €300-€500 through the Notar and Grundbuchamt. In rare cases, a new Grundschuld registration is needed, costing approximately €1,000-€1,500.

When Switching Pays Off

Even small rate differences justify switching. On a €200,000 remaining balance, a 0.3% rate reduction saves €600/year or €6,000 over a 10-year Zinsbindung — far exceeding the one-time switching cost of €300-€500. A 0.5% reduction saves €10,000 over 10 years.

Option 3: Forward-Darlehen — Lock in Rates Before Expiry

A Forward-Darlehen allows you to secure today's interest rates for a future refinancing — up to 60 months before your current Zinsbindung expires. It's essentially insurance against rising rates.

How Forward-Darlehen Pricing Works

The bank charges a premium (Aufschlag) for each month of the forward period. This premium compensates the bank for the interest rate risk they're taking on. Typical premiums:

6-month forward: 0.05-0.10% total premium
12-month forward: 0.10-0.20% total premium
24-month forward: 0.24-0.72% total premium
36-month forward: 0.36-1.08% total premium
60-month forward: 0.60-1.80% total premium

Decision Framework

A Forward-Darlehen makes sense when: you believe rates will rise more than the forward premium, you value payment certainty over potential savings, your risk tolerance is low, and your Zinsbindung ends within 12-36 months (the sweet spot for forward premiums).

A Forward-Darlehen may not make sense when: you believe rates will stay flat or fall, the forward premium is very high, you can tolerate rate uncertainty, or you have significant savings that allow early repayment.

The §489 BGB Advantage: Your Legal Right to Cancel

One of the most powerful borrower protections in German law is §489 BGB. After 10 years from the full disbursement of your loan, you have the unconditional legal right to cancel your mortgage with just 6 months' notice — regardless of the agreed Zinsbindung and without any Vorfälligkeitsentschädigung (prepayment penalty).

Why This Matters

If you have a 15-year or 20-year fixed rate mortgage and market rates drop significantly after year 10, you can exercise your §489 right to cancel and refinance at the lower rate. This is a valuable option that many homeowners don't know about.

Example: You have a 15-year fix at 4.0%. After 10 years, market rates are 2.5%. You cancel under §489, wait 6 months, and refinance at 2.5%. On a €200,000 remaining balance, this saves €3,000/year or €15,000 over the remaining 5 years.

Step-by-Step Refinancing Strategy

12-24 months before expiry: Start monitoring interest rates and your financial situation
12 months before: Request your SCHUFA Datenkopie and check for errors
9-12 months before: Contact an independent mortgage broker for rate comparisons
6-9 months before: Consider a Forward-Darlehen if rates are attractive and rising
3-6 months before: Your bank sends their Prolongation offer — compare it to alternatives
2-3 months before: Make your final decision and sign the refinancing contract
At expiry: New terms take effect automatically — no gap in financing

Special Refinancing Situations

Refinancing After Divorce

If both partners were on the original mortgage and one is buying out the other, the refinancing becomes more complex. The remaining partner needs to qualify for the full remaining balance on their income alone. A Grundschuldabtretung or new Grundschuld may be needed, and the exiting partner must be released from liability.

Refinancing After Job Change

If you've recently changed jobs, especially if you're still in the probation period, this can complicate refinancing. Some banks require you to have been in your position for at least 6 months. Your existing bank may be more flexible since they know your payment history.

Refinancing for Expats Who Have Left Germany

If you own property in Germany but have moved abroad, refinancing is still possible but more challenging. Fewer banks are willing to lend to non-residents, and documentation requirements increase. An experienced broker is essential in this situation.

Common Refinancing Mistakes

Accepting the first Prolongation offer without comparing — potential cost: €5,000-€15,000+
Waiting too long to start planning — rushing limits your options
Not checking your SCHUFA before refinancing — surprise negative entries can torpedo your application
Ignoring the Forward-Darlehen option in a rising rate environment
Forgetting to negotiate Sondertilgung rights in the new contract
Not considering changing your Tilgung rate to match your current income
Overlooking the §489 BGB cancellation right for existing long-term mortgages

Conclusion: Don't Leave Money on the Table

Anschlussfinanzierung is one of the best opportunities homeowners have to improve their mortgage terms and save significant money. The combination of reduced LTV (from years of repayment), improved SCHUFA history, and genuine competition between 400+ banks means you're almost certainly qualified for better terms than your current bank's default offer.

Start early, compare broadly, negotiate firmly, and don't hesitate to switch banks if the numbers make sense. The €300-€500 cost of a Grundschuldabtretung is typically recouped within the first few months of a lower interest rate.

Frequently Asked Questions

When should I start planning my Anschlussfinanzierung?

Start planning 12-24 months before your Zinsbindung expires. This gives you time to compare offers, potentially secure a Forward-Darlehen at favorable rates, and improve your financial profile if needed. Your current bank will typically send an offer 3-6 months before expiry — don't accept it without comparing.

Can I switch banks when refinancing my German mortgage?

Yes, you can switch banks (Umschuldung). The new bank handles most paperwork. The only cost is the Grundschuld transfer (Grundschuldabtretung, approximately €300-€500). Savings of 0.2-0.5% on interest rates often outweigh switching costs within the first year.

What is a Forward-Darlehen and how much does it cost?

A Forward-Darlehen lets you lock in today's rates for a future refinancing. The cost is a small premium per month of forward period — typically 0.01-0.03% per month. For a 24-month forward, that adds approximately 0.24-0.72% to your rate, but protects against rate increases.