Construction costs are currently skyrocketing

I know, however, that with us they will also stay at 1.1% for 17 years. That is worth a lot to me ;-)

Yes, but if the offer had been 2%, you probably would have thought/decided differently at that time...

Dear interest-rate crystal ball owners, what would you advise someone who is currently trying to arrange financing :) Basically, I find at least 15 years reasonable, if only because after 10 years there are special termination rights and you then have about 5 years to organize additional financing. (If the interest rates look good, you do it already after 10... If not, then you have time to organize yourself so that hopefully not everything blows up in your face). But the surcharges from 10->15 are not insignificant either... And longer? Hmm... with today’s something like ~3.5% I do wonder, do I consider it realistic that they will rise so much in the long term that I currently feel I have to secure "cheap" interest rates?

Am I missing something or does the argument "No problem, inflation will also eat away the debts" only hold if salaries keep pace with inflation? My boss, bless his little heart, still refuses to provide inflation adjustment, and at the company where my husband works they are currently discussing 2% as a maximum because short-time work is also a possibility there. We are feeling the price increases quite heavily in our wallets.

I always think the same. I work in the public sector administration and so far there has only been the increase negotiated before the war of (I believe) 1.8% starting in April. Supposedly there will be negotiations again in the fall but I doubt much will come of it.

After moving in, try to save 10-20k€ annually (not a new car every 3 years), this makes the follow-up financing considerably easier.

don't save invest always invest.

Dear interest-rate crystal ball owners, what would you advise someone who is currently trying to arrange financing :) So, basically I find at least 15 years reasonable, mainly because after 10 years there are special termination rights and you then have about ~5 years to organize follow-up financing. (If the interest rates look good, you just do it after 10... If not, then you have time to organize yourself in a way that hopefully not everything blows up in your face). But the surcharge from 10 to 15 years is also not negligible... And longer? Hmm... at something like ~3.5% today, I wonder, do I consider it realistic that long-term rates will rise so much that I currently feel like I have to lock in "cheap" interest rates?

We signed our financing exactly 2 weeks ago. We got 10 years at (KfW and house bank combined) about 2.7%. We did not go for 15 years because we only borrowed just under 260k (without equity) and might be finished in 15 years anyway with special repayments. The amount for the follow-up financing will in any case no longer be high enough for higher interest rates to become a problem.

Dear interest-rate crystal ball owners, what would you advise someone who is currently trying to arrange financing :) So, basically I think at least 15 years makes sense, mainly because after 10 years there are special termination rights and you then have about 5 years to organize follow-up financing. (If the interest rates look good, you just do it after 10... If not, then you have the time to organize yourself so that hopefully not everything blows up in your face). But the surcharges from 10->15 years are also not insignificant... And longer? Hmm... with today’s something like ~3.5% I do wonder, do I consider it realistic that rates will rise that much in the long term, that I currently feel like I should secure “cheap” interest rates?

First, create a table. 10, 15, and 20 years... maybe also 20 and 25 years full amortization. To simplify comparability, use the monthly rate of 20 years for all other terms (and possibly the full amortization option). Then you have a table with interest, repayment, and remaining debt after the fixed interest period expires. Now you also derive the remaining debt after 10 years for the products with a 10-year fixed interest period. This gives you comparability at 10 years. Now you can diligently calculate how much you save with which product and how much interest you can afford at the end of the fixed interest period. Does a 10-year fixed interest period work with rates of 5, 6, 7, or 8%? In the end, you have a chance/risk calculation. If you want, you can also extrapolate your salary and what you might have more or less in x years. Finally, you can ask yourself whether you want to take more risk or more security. The current crystal ball results will hardly help you. Politically worldwide, it is especially hard to predict right now.