New KfW conditions from 04/2016

Do I understand this correctly?

I only get the 1.31% effective over 20 years if I set the repayment amount so that I am definitely finished within 20 years without special repayments?

Otherwise, it is 1.51% effective (fixed interest period 20 years but longer term)?

And how does it behave if I cannot draw the loan within the [Bereitstellungsfreien Zeit] and, for example, start repayment a few months later?
12 months [Bereitstellungsfrei] + possibly 3 months [Bereitstellungsprovision] + 1 year repayment-free would already be 27 months during which nothing is repaid. Then the originally set repayment amount would no longer be sufficient to be finished within 20 years.

12 months without provision fees means the money is reserved for you free of charge during this period, without any interest accruing. Of course, nothing is repaid during this time. After the 12 months, you must pay 0.25% interest (per month) on the loan amount not yet drawn. The starting point for the interest payments (which must already be paid during the repayment-free period) and the beginning of the repayment are contractually specified.

12 months without provisioning fees and 1 year without repayments do not add up.

But with 1.3 you can choose up to 3 years without repayments.

Additionally, KFW has a repayment calculator on their website. There you can see how nicely it works out.

What exactly do you mean by 3 months provision fee in connection with KFW 153?

- this refers to interest paid when the loan is not drawn within a certain period of time. (Currently 0.25% per month).

I need to elaborate a little.

We are currently looking for financing.
Let's say signing on 01.05.2016.

The house construction (prefabricated house) is planned with the manufacturer, but the house installation will only take place in March/April 2017 due to delivery times.

The plot of land is already being paid for at this moment with equity capital, as well as the first smaller invoices.
We assume that from about Jan/Feb 2017 we will need to draw the first partial amount from the loan.
For earthworks and the base slab.

After the house installation (April), the big invoice from the house company will come, followed by further invoices after completion of interior work and a final invoice; this will certainly continue together with materials for EL (floors, walls, ceilings) until about July/August 2017, until all invoices for the house are paid.
Moving in is planned for July; then we still have to do the outdoor facilities in EL where the material costing about €10,000 is also included in the loan amount. Let's say we will do that until September, after moving in.

Only then, i.e. in September 2017, would the loan amount (main loan & KfW) be fully disbursed and, to my knowledge, repayment can only begin then.

With a loan agreement signed on 01.05.2016, it would look roughly like this:

[*]01.05.2016 Signing of the loan agreement and start of the fixed interest period (20 years)
[*]Feb 2017 First partial amount drawn from the loan (earthworks, possibly base slab) and start of interest on the drawn amount

[*]Apr 2017 Large invoice for house installation, interest rises with the drawn amount
[*]01.05.2017 From here, the standby fee of 0.25% per month applies to the amount not yet drawn. Interest on drawn amounts must of course still be paid
[*]... further drawdowns. Standby fee becomes lower, interest higher
[*]01.09.2017 Last drawdown and start of repayment

It is definitely interesting to know that the 12-month standby-free period and the repayment-free year do not add up.
We also want to start repaying as early as possible.
In our scenario, however, we might only start repaying 16–17 months after loan signing, meaning we would have to pay this fee at least partially for 4–5 months.
Possibly also depending on which loan is paid out first—the one from the house bank or the one from KfW?

The actual question, however, was whether we only get the 1.31% at KfW if we have fully repaid the loan within 20 years from loan signing (i.e. by 01.05.2036) and whether the monthly repayment amount is set accordingly from the start.

This controls the amount of the rate with KfW and determines how much repayment we can still afford with the house bank to remain under our desired total monthly burden.

If we wanted to keep the monthly KfW burden lower to achieve, for example, over 3% repayment at the house bank (below which there is an interest surcharge), then I fear we will not manage to fully repay the KfW loan in 20 years and would receive only 1.51% from KfW for the entire period because the term >20 years.