Cost invoices in an accounting firm: the answer with the right company
The system writes the client a question about the invoice and makes sure the answer reaches the right company. The accountant decides the posting.
Automation, paid once
from €3,000 net
Test on your process: €0
You pay 50% after acceptance
How much does cost invoice automation for an accounting firm cost, and when does it pay back?
Short answer
Cost invoice automation for an accounting firm costs from €3,000 net. In our scenario it pays back in 2 months. Today, handling 500 questions about cost invoices costs the firm €1,745 a month. With the system, the same work costs €267. The posting and the tax treatment stay the accountant's decision. The system makes sure each answer reaches the right client company. The test on your process is free.
Statistics
Accounting firms and AI statistics 2025
30.7%
According to Eurostat (2025), 30.7% of EU enterprises paid for cloud software for finance and accounting.
What clearing up invoices with clients costs you today
€1,745
a month for handling 500 questions about cost invoices
Today€1,745
With the system€267
Payback: 2 mo.
In your company
Firm of 2 to 5 people
250 questions · €873 a month
4.1 mo. payback
Firm of 6 to 10 people
500 questions · €1,745 a month
2 mo. payback
Firm of more than 10 people
1,500 questions · €5,235 a month
0.7 mo. payback
The team gets back about 42 hours of work a month, or 5 working days, and the company €17,736 a year. We count after the time a person spends checking and after the model cost.
500 × 6 min = 50 h × €34.90 = €1,745 a month. With the system, a person checks the output in 15% of the old time (€262) and the model costs €4.82. That leaves €267. The saving is €1,478 a month, so €3,000 pays back in 2 months.
Assumptions: 6 minutes to clear up one invoice with a client and checking in 15% of the old time are our assumptions. €34.90 an hour is the EU average hourly labour cost for 2025 according to Eurostat, for companies with 10 or more employees. Model cost: Claude Sonnet 5.5, about 3,000 + 500 tokens per question, at the ECB rate of 1.1205 USD per euro on 22 October 2026.
What changes with an invoice that has no description
Today
A client's invoice does not say what the cost is for
Team
The accountant emails a question
Team
The client replies from another address or in one batch
Client
The accountant works out which company it concerns
Team
Adds the explanation to the document
Team
With the system
Spots an invoice with no cost description
AI
Writes the client a question with the invoice number
AI
Files the answer with the right company
System
The accountant decides the posting
Person
The explanation stays with the document
System
What stays with people: The posting and the tax treatment stay the accountant's decision. The system makes sure each answer reaches the right client company.
foap.com customer service: 95% of replies are sent automatically.
Users from several countries write to foap.com, in several languages. The system reads the entire conversation and the terms of that person, and then sends a response in that person's language. Questions about money and exceptions go to the team with a ready draft, so they have to check and send them.
the system sends the answers itself, without human typing
95%
the system sends the answers itself, without human typing
time from the arrival of the e-mail to the ready response (median)
30 s
time from the arrival of the e-mail to the ready response (median)
e-mails that require a response receive a ready-made draft
100%
e-mails that require a response receive a ready-made draft
less work for every 1000 answers (estimate)
47 h
less work for every 1000 answers (estimate)
Data from foap.com production, October 20-21, 2026. Estimate: 3 minutes for handwritten response.
Our invoice coding system proposes the account and cost centre with its basis and holds an invoice it cannot describe, with a specific reason. In an accounting firm that reason becomes a question to the client. Demonstrator on synthetic data.
“We started with my own AI agent. During the training that followed, I learned to build new applications myself. Today I am bringing this way of working with AI into my business. Working with Syntalith gave me exactly the skills and tools I needed.”
A draft question to the client with the invoice number
Filing the answer with the right company
The explanation saved with the document
What happens to your data
You choose the test cases. We anonymise them on request.
They stay in the EU and we delete them after the test.
We sign the NDA and the data processing agreement before we receive anything.
After acceptance you keep the code, the test set and the documentation. You pay for licences and model usage directly to the provider. With several departments or companies, the engineer suggests a Process Audit from €600 net: a map of the flow and a fixed quote. We deduct the audit fee from a build signed within 3 months.
Questions
How much does a queue of invoice questions for an accounting firm cost?
From €3,000 net, paid once. After the 5-day test the build takes 2 to 6 weeks. You get a fixed price before the contract: 50% on signing and 50% after acceptance on your own invoices.
Does the system send questions to clients on its own?
The system prepares the question, and the accountant approves it before it goes out. Sending stays in the email program you use.
Would a client portal be enough?
If clients answer in the portal and name the company, the portal is enough. The system makes sense when answers come by email from different addresses and someone assigns them by hand.
When does it not pay off?
Below 85 questions a month the payback takes more than a year. Then it is better to start with ChatGPT or Claude for the team, with rules for working with client data, from €1,150 net.
What do we need to prepare?
A list of clients with their tax numbers and account managers, 20 to 100 questions from recent months and examples of the questions your accountants send most often.
What our OpenAI and Anthropic partnerships mean for you.
OpenAI makes ChatGPT and Anthropic makes Claude. We belong to the partnership programs of both companies, so we work with their tools every day and learn from the creators themselves.
Claude Partner Network
01We will select a tool for the task
We implement both ChatGPT and Claude. We check both on your documents, and you choose the one that makes fewer corrections and saves more time.
02Knowledge straight from the creators
We learn from official OpenAI and Anthropic courses and materials. Your team learns about the features and settings that work today.
03Licenses without our margin
You buy accounts directly from OpenAI or Anthropic and receive an invoice from them. We do not add anything to the license.
04Certified engineers
On the team, we have an AWS certification in machine learning and an Anthropic certification in systems architecture on Claude.
Participation in programs does not mean that OpenAI or Anthropic endorses our services.
customer service
