Financing a single-family house with 170 sqm

Without special repayment, this is also the case with 23 years if you assume 1800 euros per month (just roughly calculated the worse interest rate with the repayment of 1800).

I don’t understand that. To repay a 522k loan at 1.02% interest within 23 years, you’re easily looking at a rate of 2100-2200. In doing so, you are assuming that after 10 or 20 years the interest rate is still at 1.02%.

With an 1800 rate (which is already higher than you plan), you would roughly have 160k remaining debt after 20 years. If interest rates were then at 5%, you would continue to pay off for another 10 years with that rate.

I don't understand that. To pay off a 522k loan at 1.02% interest within 23 years, you would easily have a rate of 2100-2200. You are assuming that after 10 or 20 years the interest rate will still be at 1.02%.

With an 1800 rate (which is already higher than you plan) you would have roughly 160k remaining debt after 20 years. If the interest rates then were at 5%, you would pay off for another 10 years with the rate.

We will not need 522, the advisor has calculated very generously everywhere. We are currently calculating with 487. And that is 23 years at 1800 euros at constant interest. We will certainly pay off part through special repayments after 20 years.

The consultant calculates generously because it is the rule that what doesn't fit becomes more expensive. He sells it to you as a buffer.

The consultant calculates generously because it is the rule that what does not fit becomes more expensive. He sells it to you as a buffer.

No, because we wanted to calculate higher once, at the beginning it was significantly less. We just wanted to know before the house offer where it is going, and he himself says we will not take the loan like that.

I don't understand. Which numbers did you use then?

The repayment should be finished after 22 years.

We are currently calculating with 487. And that is 23 years at 1800 euros with constant interest.

No, that is 25.5 years at 1% interest. Unless you put in a 50,000€ special repayment.
(And it might be extended by the time of readiness, meaning the length of the construction phase.)

Since you gradually plan further own contributions like paving, garden, etc., I assume that it will come down to the normal case, that no special repayment will be made, at least in the first years. That has happened to all of us :)