Financing monthly installment €2500 with 40 years term

Now that it is clear that there is no financial problem, here is a tip when it comes to concrete implementation:
Look closely at the loan-to-value ratio you get with the loan amounts and the equity you bring in! There are the magical thresholds >100%, 90%, 80%, etc. With "approximately" 50-60k on a 630k requirement, 3-5k more equity could cross the 90% hurdle. Discuss this with your advisor. Maybe there is a lender in the family who could provide the money at short notice (and by the time such contracts are concluded, there will be 2 more months of equity available).
I haven’t read anything about KfW yet.

And why. We are financing for 25 years. However, I am 44. So also almost until 70.

Congratulations on that, at least 15 years shorter than what is advised to the OP.

Why?

Almost 70 means that you will be financing into your retirement age. That means that the pension must be sufficient for the installment. The older the house, the more you have to reinvest. Thus, the assumed special repayment goes towards some kind of repairs on the house. I am not even going to talk about the interest rate risk in the follow-up financing.

One should always choose a healthy repayment rate that one can stick to.

But that doesn’t mean you know anything about construction financing ;) . By the way, I do too – in fact, since last century in real estate financing.

I also wrote that from experience, the money from the special repayment is often used for other things. So the OP is warned.

And once again: Why is it madness to finance for 40 years? So far you haven’t given any argument, just thrown out your very personal opinion. You can do that, but why should anyone be interested if you just blurt it out without reasoning.

Since I myself come from construction financing and also finance myself. Here are the arguments why you should not set the repayment to 1%:

* Special repayments are usually misused
* The house gets older, investment backlog; people use the special repayment to carry out repairs
* Interest rate risk during follow-up financing. Securing it through building society savings etc. can also be put into the repayment
* 40 years means financing until retirement age with significantly less pension.

1% is nonsense, banks have always assumed 2% repayment in their assessments so that no customer goes bankrupt

If you can't afford the payment anymore, you just sell the house. However, the rent for an apartment half the size will probably be twice as high as the payment for the house.

Since I myself come from construction financing and also finance myself.

Oh really? I thought you were an IT specialist who only works at a bank. Please clarify what profession you have now. That helps to categorize your answers.

Congratulations on that, after all 15 years shorter than what is advised to the OP. Why? Almost 70 means you will be financing into your retirement age. That means the pension must be sufficient for the installment. The older the house, the more you have to reinvest. Thus, the assumed special repayment goes towards some repairs on the house. I won't even talk about the interest rate risk in the follow-up financing. One should always choose a healthy repayment rate that one follows through.

You forget that many companies offer occupational pensions. My wife and I have some. In the worst-case scenario, we will receive well over 100,000 euros. We can use this, in the worst case, to pay off the remaining debt. A second alternative would still be to sell and move into an apartment, which is also not the end of the world.