Cost estimate and final invoice

  • Erstellt am 2019-11-23 20:22:15

Hexe3000

2019-11-23 20:22:15
  • #1
Good day,
The following happened to our homeowners' association:
The roof and the facade had to be renovated. An engineering office was commissioned. They created a bill of quantities [LV], on which 3 companies submitted an offer. (May 14, 2018)
The cheapest was invited 10 days later (May 25, 2018) after submission for a bid negotiation. The company was granted a 19% surcharge on the price. Reason according to the engineer: price increases over the last 3 years. Since the construction was only supposed to take place in March 2019, the company demanded a 5% price increase in September 2018. Unfortunately, the contract was signed in December 2018 on this basis.

Now regarding the final invoice.
According to the contract, billing was to be based on measurements. Now some square meters or meters were omitted. Also, some positions from the [LV] were not applied.
Prices were recalculated for each position but not uniformly. Sometimes more than the 24%, sometimes less, based on the cost offer from May 2018. At the end of the company's invoice is the sum X without the 19 and 5% being shown.
I have now recalculated the invoice differently: I took the price from the [LV] of May 2018 and added the 19 and 5% at the end. With this calculation, I am even below the company's final price. The engineer said you can’t calculate like that; we would be below the offered total price ([LV] + 19 + 5%) and only that counts.
Am I wrong with my calculation?
The next question would be: I understand that possibly an adjustment for the future can be made. Order today, build 8 months later. Is there a guideline for something like that?
Thank you for your answers
 

seat88

2019-11-23 20:30:17
  • #2


Yep...
 

Hexe3000

2019-11-23 20:31:40
  • #3
OK, for what reason?
 

Hexe3000

2019-11-23 20:53:25
  • #4
Example
Offer 200 sqm at 10 € = 2000 €
Renegotiation 20 % more so = 2400 €
Invoice from the company after measurement 184 sqm at 13.00 € = 2392 €
My calculation:
183 x 10 = 1830 € + 20 % = 2196 €
This is only a fictitious example. What is wrong with my thinking? Contracts were concluded in the same way. I have read that discounts, for example, are always deducted at the end and not that individual items are calculated differently from time to time.
But perhaps you could tell me the correct method of invoicing.
Thank you very much
 

Tassimat

2019-11-23 20:53:49
  • #5


How am I supposed to understand that, does the contract state that the purchase price is raised by 19%? What does the passage in the contract about this look like?

Yes, because the old "fixed price" is nonsense, as billing is done by m and m² etc. Are the newly calculated quantity details correct? The price per m and m² can then increase by 24%, which can sum up to significantly more than the old offer price plus 24%. You also received more services than were stated in the offer.
 

kbt09

2019-11-23 20:57:26
  • #6

Why do you only add 10% when 20% was renegotiated?
 

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