Construction companies manage dozens of jobs, different projects, and demanding clients every day. When we add to that legal obligations, especially the fiscalization of invoices, administration often becomes a drag on business.
From 2025, fiscalization is even stricter, and errors in the account can mean rejection from the Tax Office, delay in collection and additional administrative burden.
In this guide we explain What fiscalization means specifically for construction companies, which rules most concern contractors, and how automation in the ERP system can reduce errors and speed up billing.
What is fiscalization – a simple explanation
Fiscalization is the legal obligation to send invoices to the Tax Administration in digital form, immediately at the time of issue.
In construction this means:
- Every invoice for work performed must be fiscalized.
- invoices are sent in a standardized electronic format
- Tax returns confirmation or error
- A rejected invoice must not be put into circulation.
Although it sounds simple, the construction industry has specificities that make the process often much more complex.
1. Why is fiscalization in construction particularly challenging?
Unlike a store or restaurant, construction companies have:
- multiple parallel projects
- several types of work
- a large number of work orders
- approval from supervision
- invoicing by stages
- complex items with KPD codes
- combination of B2B and B2C clients
- It's an account the last step in a chain that is already 10–50 activities long.
If the system does not automatically connect all these steps, fiscalization becomes manual work and a source of errors.
2. The most common problems of construction companies in fiscalization
I. Work is managed in multiple software tools
In most companies the situation looks like this:
- work orders → WhatsApp / Excel
- supervision → PDFs, papers
- work calculations → Excel spreadsheets
- invoices → accounting program
- fiscalization → special module or additional service
Result:
➡️ there is no unified flow of information
➡️ data is copied manually
➡️ every step carries the risk of error
➡️ invoices arrive late, fiscalization is monitored in a program that does not monitor the work process, and notification is through several different layers
This is the main reason why construction companies spend too much time on administration.
II. Copying items from the control to the account
Generic ERPs do not have a construction workflow.
This means that the accountant or construction site manager must:
- manually enter work items
- to transcribe m², pieces, hours
- re-enter the names of the works
- manually add KPD codes
- enter prices manually
Any error in this step can stop fiscalization.
In practice, it regularly happens:
- wrong amount
- wrongly added amounts
- net instead of gross
- wrong KPD code
- decline in fiscalization
- due to invalid XML
All because the system was not integrated from the beginning.
III. Manual selection of KPD codes
In construction, as in other industries, KPD codes are mandatory for each item.
Generic systems:
- do not offer pre-selected KPD codes
- they do not have validation before fiscalization
- do not link KPD to the type of construction work
Result:
➡️ manual selection
➡️ high chance of error
➡️ fiscalization is falling
➡️ the account must start from scratch
When ERP is fully functional, KPD is added automatically based on the type of work performed.
IV. No automatic transfer of actions from monitoring to account
In most tools, monitoring and invoicing are not linked.
This means:
Supervision approves 50 items → only 41 arrive on the account, because the rest are "forgotten".
The most common mistakes:
- items are missing
- changed unit of measure
- wrong amount of m²
- changed description of works
All this blocks fiscalization and creates additional work.
V. Manual monitoring of fiscalization status
In generic systems:
- the user does not know if the account is verified
- does not see status history
- doesn't know why the account was declined
- must manually check status
When the account goes down, the user finds out only when the investor or inspection says:
“Your bill is incorrect.”
Correct construction fiscalization workflow
When ERP is tailored specifically to the construction sector, the process looks like this:
Work orders → Supervision → Selection of approved works → Automatic invoice → Fiscalization → Confirmation
No rewriting.
No five tools.
No manual KPD codes.
No errors.
B2B and B2C – practical differences
A true construction ERP does everything automatically:
- generates an account number
- withdraws confirmed works from supervision
- validated by OIB
- adds KPD codes
- VAT account
- sends the invoice to fiscalization
- follow the status
- gives notifications if the account goes down
- It integrates this entire process through the work and work orders of the field workers who perform the work.
This is a big difference compared to generic systems.
Advantages of a complete ERP solution
1. Time savings (8–13 hours per month)
No rewriting of items, manual KPDs, or multiple tools.
2. Fewer errors (drops from 5% to <0.5%)
Automatic validation before fiscalization.
3. Faster payment (15–20 days earlier)
Because invoices are issued immediately after the inspection.
4. One platform (instead of 5–6 different ones)
Work orders, supervision, invoicing and fiscalization → all in one.
5. Complete control over projects
The director and construction site manager see everything in real time.
Construction companies that work in multiple tools have:
- scattered data
- manual processes
- more mistakes
- slower fiscalization
- slower payment
A complete ERP system eliminates all these problems.
It connects:
➡️ work orders
➡️ supervision
➡️ calculations
➡️ accounts
➡️ fiscalization
in one unified flow without manual work.
For more information about process automation and fiscalization, feel free to contact us.
