What Is an Annuitized Mortgage? Simply Explained for Property Investors

1200-euro monthly payment? Know what you are actually paying

An annuitized mortgage is a loan where your total monthly payment stays the same for a set period, while the interest portion shrinks and the repayment portion grows.

You will encounter this product on most German purchase finance offers because it gives payment certainty and predictable amortization.

• Fixed periodic payment (annuity) made of interest plus principal

• Interest calculated on remaining principal each period

• Principal repayment increases over time while total payment stays equal

Why this matters for investors

You can forecast cashflow precisely, which helps when assessing net rental yield after financing costs.

Banks price risk into the interest rate; a lower initial rate improves short-term yield but not long-term amortization speed.

Simple definition: rate, interest share, repayment share

Rate means the fixed periodic payment you transfer to the lender. It equals interest plus repayment in each period.

Interest share is the portion of the rate that remunerates the bank for lending money; it is calculated on the outstanding principal at the start of the period.

Repayment share (tilgung) is the remainder of the rate applied to reduce outstanding principal; statutory AfA rules are separate from loan repayment but matter for tax depreciation planning.

• Rate = interest + repayment

• Interest = outstanding principal x nominal rate / periods per year

• Repayment reduces the outstanding principal and raises the interest share next period

Worked example: buy-to-let apartment in a B city

Example: purchase price EUR 285,000; you finance EUR 228,000 (80%) with an annuitized mortgage; nominal interest 3.2% p.a.; initial repayment 2% p.a.; annual annuity = 5.2%.

Annual payment = EUR 228,000 x 5.2% = EUR 11,856; monthly rate = EUR 988. You will pay EUR 988 each month as long as the rate stays fixed.

Year 1 interest = EUR 228,000 x 3.2% = EUR 7,296; year 1 repayment = EUR 11,856 - EUR 7,296 = EUR 4,560; outstanding principal after year 1 = EUR 223,440.

• Monthly rate: EUR 988

• First-year interest: EUR 7,296; repayment: EUR 4,560

• Principal after year 1: EUR 223,440

How numbers change over time

In year 2 interest = EUR 223,440 x 3.2% = EUR 7,150; repayment = EUR 11,856 - EUR 7,150 = EUR 4,706. Repayment portion rises slowly each year.

If you increase initial repayment to 3% (annuity 6.2%), annual payment becomes EUR 14,136; principal falls faster and total interest paid over the loan term decreases.

What investors should check before signing

Look at the fixed-rate period length; a 10-year fix gives stability, but refinancing risk grows afterwards if market rates rise.

Compare effective cost after fees and Grunderwerbsteuer; remember purchase costs in Germany typically add 10-15% on top of purchase price depending on federal state.

• Fixed-rate period (Zinsbindung) and prepayment rules

• Initial repayment rate; higher tilgung shortens total interest paid

• Total acquisition costs including Grunderwerbsteuer, notary, and broker fees

Common mistakes investors make

A common mistake: choosing the lowest nominal rate but setting repayment too low; you end up paying long-term high interest and slow equity build-up.

A common mistake: ignoring the Spekulationsfrist and tax implications; hold periods and depreciation (AfA) interact with financing choices and rental yield projections.

Short comparison: annuitized mortgage vs. interest-only

Annuitized mortgage gives stable amortization and growing equity; monthly payment stays constant while principal portion increases.

Interest-only loans have lower initial payments because you pay only interest; principal remains unchanged unless you make extra payments.

• Annuitized: predictable amortization, better for long-term buy-and-hold

• Interest-only: better short-term cashflow but higher long-term risk

Which to use as an investor

If you target steady rental yield and equity accumulation, annuitized loans with a meaningful initial tilgung of 2-3% are often preferable.

If you plan quick resale within the Spekulationsfrist window or need temporary cashflow relief, interest-only can be considered but requires a clear exit strategy.

Tools and next steps

Use a mortgage calculator to test scenarios with different interest and repayment rates and to produce amortization schedules.

Check the glossary entries on annuity and repayment for quick refreshers when reviewing offers.

• Run numbers for several tilgung levels to see impact on monthly rate and total interest

• Factor in rental yield and ancillary costs when calculating post-finance cashflow

Useful links

Definition of annuity and how it splits into interest and repayment is available in the glossary: annuity.

For a focused explanation of repayment mechanics see repayment.

Try the interactive calculator to model your mortgage: mortgage calculator.

Frequently Asked Questions

How do I calculate the monthly rate of an annuitized mortgage?

Multiply the loan amount by the sum of the nominal interest rate and the agreed initial repayment rate to get the annual annuity, then divide by 12. Example: EUR 228,000 loan x 5.2% = EUR 11,856 per year, or EUR 988 per month.

What happens to the interest share over time?

The interest share declines because it is calculated on the outstanding principal, which falls each period as you repay. The repayment share correspondingly rises while the total payment stays constant.

Should I choose a higher initial repayment (tilgung)?

If your goal is faster equity build-up and lower total interest, raise the initial tilgung to 2.5-3% or more. Be aware that higher tilgung increases monthly cost; balance this with projected rental yield and tax considerations such as AfA.

Can I repay early and what are the costs?

Early repayment rules depend on your contract and the remaining fixed-rate period; banks commonly charge a reimbursement fee for prepayment during the Zinsbindung. Check contract terms before deciding.

Run your own scenarios now with the Investbud mortgage calculator: https://investbud.de/en/calculators/mortgage