I have a clause like this:
For the agreed services, a lump sum fixed price of xxx including the statutory value-added tax (VAT), currently 19%, is agreed. The client receives a fixed price guarantee for 12 months. If the tax rate changes, the price changes accordingly.
So if the VAT decreases, the fixed price would also decrease.
Unfortunately, I don't believe the work will be completed by 12/31 (completely up to interior plaster). The building application has just been submitted.
I would need to talk to the general contractor to see if we can change the contract from lump sum to individual services, since I might potentially remove windows anyway, that might be the more sensible way. But then there is a risk that it will become more expensive.
Well, first we have to wait for the building permit.
The cool thing is, the demolition will probably fall exactly into that phase, which is already a few hundred euros.
Small amounts also add up.