As data volumes grow and organizations become more complex, accounting processes in many places are still running in manual mode. This leads to backlogs in monthly closings, a high susceptibility to errors, and regular queries across departments.
In this case study, we show how an AI-based platform automates the account assignment of operational invoices—and why this brings significant efficiency gains, especially in logistics. At our company, this task is handled by Anna, our new virtual employee.
Why account assignment remains a bottleneck to this day
Many companies work with established structures, heterogeneous supplier landscapes, and changing invoice formats. Invoices arrive unsorted, posting logic varies depending on location, and even recurring documents have to be assigned manually time and again.
Added to this are fixed-price supplier relationships, different G/L account models, and rapidly changing cost center structures. Although most companies already have extensive posting histories, they are often not used systematically—neither as a basis for decision-making nor for automation.
The consequences are frequent queries, delays in approval, and unnecessary coordination efforts between accounting, controlling, and the specialist departments.
How automated account assignment works in practice
ExB’s AI-based solution handles the entire account assignment process, from document recognition to approval recommendations – without rigid rules or complex setup.
First, it automatically recognizes the type of document: workshop invoice, telecommunications service, leasing document, waste disposal, cleaning, or energy supply. Relevant fields are extracted, even if the layouts vary greatly depending on the supplier.
The platform then uses two sources of information that are already available in the company: historical postings and internal allocation tables.
From previous approvals, the AI learns which cost center was typically used, which G/L accounts match which suppliers, and how similar items were posted in the past.
At the same time, internal allocation logic is taken into account—for example, “Supplier A → G/L account Maintenance” or “Location X → Cost center Vehicle fleet.”
Both sources of information are used to create a robust model that reliably assigns accounts to invoices and generates a suggestion for a cost center, real account, or cost unit for each item. The platform clearly marks any unclear values so that only genuine special cases require manual review.
of noticeable effects in daily operations
The use of this solution changes the reality of work in accounting and controlling.
- 83% less manual account assignment work
Recurring invoices are processed automatically. - Faster monthly closings
Accounting no longer has backlogs. - Higher data quality in controlling and cost center accounting
Clean allocation → better budget planning → more controllability. - Stable processes despite staff shortages
Anna works 24/7 and scales without additional costs. - Automatic approvals
Only exceptions require attention.
Why CFOs and controlling departments benefit from automated account assignment
While the operational benefits of automated account assignment are evident in everyday work—less manual work, fewer queries, faster approvals—the strategic advantages are particularly strong in accounting, controlling, and finance processes. Here, the quality of account assignment has a decisive impact on the controllability of the company.
Lower risk through reliable allocations
In many companies, discrepancies in monthly financial statements are not caused by incorrect amounts, but by incorrectly assigned cost centers or inconsistent use of G/L accounts.
AI-based account assignment significantly reduces this risk because it consistently assigns accounts according to the same patterns, neatly incorporates historical postings, and minimizes error-prone manual decisions. This noticeably reduces the likelihood of incorrect postings and costly rework in the closing process.
Faster closing cycles
When invoices are automatically assigned to accounts and approved, there is less backlog at the end of the month. Approvals run parallel to day-to-day business instead of being concentrated in the last third of the month. This not only speeds up the accounting process, but also gives controlling and management an earlier and more stable view of running costs.
In many cases, the closing process is significantly shortened because media breaks, queries, and manual assignments are eliminated.
Higher data quality for reporting, BI, and planning
Clean, correctly allocated invoices form the basis for reliable analyses. When cost center logic is applied consistently, the quality of budget control, forecasting, and reporting automatically improves.
Typical improvements can be seen, for example, in:
- Uniform cost center logic across all locations
- Transparent account assignment decisions
- Clear separation of Opex and Capex items
- Clear, reliable cost trends over multiple periods
These effects can be achieved without additional effort, as the AI accesses existing booking histories and internal allocation tables.
More accurate cost center accounting – without extra work for the team
Reliable cost center accounting can only be achieved if each item is assigned correctly and consistently. This is precisely where finance teams benefit: automated account assignment creates structure in historically grown posting logics and makes assignments more traceable.
This not only reduces the workload for accounting, but also ensures that controlling no longer has to periodically clean up or reassign data. The cost center structure becomes more stable, transparent, and easier to manage in the long term.
from everyday logistics
A workshop invoice with regular maintenance items is automatically assigned to the vehicle fleet – including the real account for maintenance. A monthly telecom invoice is immediately assigned to the correct cost center for the respective location. Leasing invoices are assigned accounts based on known supplier logic, and facility services are assigned according to existing assignment tables.
The key advantage: the platform also recognizes new document variants or slightly modified layouts because it does not rely on rigid rules, but on real experience and semantic patterns.
Why AI-based account assignment is superior to traditional rules
Rule-based systems quickly reach their limits:
- new suppliers
- changed layouts
- deviating amounts
- multi-level items
Our artificial intelligence, on the other hand, combines:
- semantic document recognition
- historical booking patterns
- organization-specific assignment tables
This enables Anna—our virtual clerk—to make reliable decisions even with unfamiliar invoice formats and to continuously learn new things.
With Anna as an AI-supported account assignment tool, companies significantly reduce manual effort, speed up approvals, and stabilize their financial processes. At the same time, data quality improves noticeably—an advantage that is immediately apparent in controlling, budget management, and reporting.
In logistics in particular, where a large number of different operational invoices are generated, automated account assignment ensures that accounting teams have more time for tasks that really add value.
FAQ
about automated account assignment
Workshop invoices, telecommunications costs, leasing, facilities, energy, services, and much more.
Through historical bookings, supplier samples, and internal company assignment tables.
Yes – standard cases are approved automatically. Only exceptions require human review.
Immediately – no setup or prior training required.
