Loan with an interest rate of 2.51% - Tips for financing

Hello everyone,
I have now received a new offer. It looks as follows:

2 KFW loans together 100,000 € (153 and 124) with 30 and 35 year terms with 182,- and 170,- repayment.
In addition, an annuity loan of 240,000 € with 3.07% and a 15 year term.

I repay the two KFW loans normally. With the annuity loan, only interest is paid for 15 years (no special repayments possible). At the same time, into a building savings contract which pays off after 15 years at an interest rate of 2.75% with a saving rate of 400 €.

Rate in the first 15 years 1,370 € (2x KFW plus 400 building savings contract plus remaining interest on annuity loan). Rate from the 16th year then 1,400 € for the building savings contract plus 170€ plus 182€ for KFW.
So a total of 1,585 € from the 16th year onwards.

With this, I will have paid off after 28 years and 5 months.

So the rate increases by over 200 euros, but I have interest rate security and fixed rates until the end.

Does such a financing make sense? I am not a fan of building savings contracts (Riester not at all). I would prefer to pay something via a KFW loan plus a fixed bank loan without any frills. The building saver also costs fees. But I believe this is a common approach for such long terms.

1. The annuity loan is not an annuity loan because it is not repaid continuously. It is a bullet loan combined with a savings building society contract. 2. The installments are only secure for the first 10 years; after that, there will be an adjustment of the KfW loans. Since (in my opinion) interest rates will rise sooner or later, the installment will also change accordingly. 3. Why take the detour via a building society contract? Why not directly an "actual" annuity loan as a full repayment loan over 25 or 30 years? Plus flexibility through special repayments or changes in repayment... 4. Have your offer calculated once for what it "costs" = interest + fees over the entire term and compare it with an annuity loan (KfW can be neglected as it is possible in both models) ===> then you can compare objectively 5. Currently, it is not a "usual" but a possible approach. You can also fix the interest rate for up to 30 years. This variant is popular because the bank can make good money from it again (conclusion of building society contract = commission/closing fee + earnings from the normal loan)

Regarding point 3, I can only say that a full repayment loan with a 30-year term costs us 3.8% interest. That is not negligible. With our planned monthly rate, that would be tight. That was the interest rate I was given by the independent advisor. Meanwhile, the Commerzbank has also responded and told us the loan interest rate for 15 years, 3.2% plus 0.1% if 5% special repayments per year are to be possible.

Oh, with the [Bausparvariante] we would be at around 3%.

Often topic: If it gets really tight with, for example, 100 euros more per month, then consider building / financing a smaller size.

We also pay only 3% for a 20-year full repayment loan, but can reduce the repayment rate if necessary (repayment change possible 3 times). Additionally, we can make special repayments and also have the statutory right to terminate after 10 years.

No, it won't get tight. It was just our self-imposed limit.

As an example: If I pay off with 3.8%, I pay €1,650 in the targeted period = €559,900.
In the last listed loan (with the building savings contract), I pay €1,370 at the beginning, then €1,585 = €501,845.

That is almost €60,000. It is worth calculating precisely.

The 3% depends on so many factors. For us, it would be something like 3.3...% over 20 years.

I do not pay off €1,650 per month. That is definitely too much for me. The Porsche still needs to be paid for (that was just a joke...).