- Annuity loan €480,000 20 years fixed interest 1.35% €932 repayment remaining debt €370,611.05 costs €113,359
You pay €932 initial repayment per month, I interpret, and that over a period of 20 years? Even without compound interest effect, I come to €223,680 being repaid. How can the remaining debt then be only €110k less than the initial amount?
And in variant 1, the interest-only loan... €250k at 0.6%, I come to €125 per month... why are you paying €625 then? Is something already being saved there?
In general... interest-only periods, or saving in a building savings contract, initially cause "losses," because in case one you do not repay, in case two you save and practically get no interest. At the same time, you pay interest on the full loan amount. That is why such variants are always initially more expensive than a classic annuity loan, where repayment starts from the beginning. The "consideration" is the security. You know how it will continue after the end of the fixed interest period. It is your very own risk tolerance that decides whether this security is worth the extra cost to you.
Generally, why are such complicated constructions being offered to you? I would not get involved in that. Plain "normal" annuity loan, combined with KfW, possibly (two?) modules with different terms (10/20 years), plus a special repayment option – then you can make use of it if you can afford a higher rate later. That's it.