Surcharges of 10% despite a fixed price contract

What exactly? That the clients usually put up with everything? We've come that far already. So why even sign contracts?

Yes, unfortunately. What do you want to do about it? Although I can partly understand the general contractors as well, they have their contracts terminated or not fulfilled just the same. And their hands are just as tied. If the supplier doesn't deliver at the agreed price, the general contractor is in the same situation.

Actually, the only help is to talk to each other and find a solution together.

Actually, the only thing that helps is to talk to each other and find a solution together.

After such a letter, I would have zero desire to do that. The entrepreneur could have talked to me too. But he didn’t.

What exactly? That clients usually accept everything? We're already that far. So why even conclude contracts?

Period. As if everyone just has a buffer for 50, 60, 70k. Fixed price is fixed price. The customer also doesn't want a discount when raw material prices fall... the contractor just has to forgo margin.

We'll talk when your project has its first problems. Whether you then go straight into confrontation with your developer (and maybe won't be allowed to enter the construction site until completion) or somehow try to keep the construction site running ;)

the contractor just has to give up the margin

With a 10-15% profit margin, the contractor would rather give up the business and leave you as the customer starving in the air. Contracts or not.

Then the contractor will HAVE TO pay penalties + penalties of the bank due to undrawn loans And that amounts to hundreds of thousands....