5 accounting firm processes that no longer need a human

Published 12 November 2025 · 8 min read

I've spent the last couple of years working with small accounting firms on the Costa Blanca. The traditional kind: three or four people, a couple of hundred clients, the usual accounting software (A3, Sage, Holded, Contasol). And I keep seeing the same pattern: the good people in the firm spend half their day doing things a machine would handle without blinking.

I'm not talking about replacing the accountant. I'm talking about taking the repetitive admin off their plate so they can focus on what they actually get paid for: advising. These are the five processes that, in my experience, no longer need a human behind them. Or at least, not a full-time one.

1. Classifying and posting invoices into the accounting software

This is the classic. A client sends thirty PDF invoices by email, another one drops off a shopping bag full of paper, and someone in the firm spends the afternoon typing in account codes, taxable bases and VAT rates.

This is a solved problem today. A system with OCR (optical character recognition, which is basically reading text from an image) combined with an AI model can:

• Pull out tax ID, date, base, VAT, total and description
• Assign the right accounting code based on that client's history
• Detect duplicates
• Post the entry straight into A3 or Holded via API

A firm I work with in Alicante had one person spending four hours a day on this. Now it's twenty minutes of review in the morning. The system does the rest, and flags only the low-confidence invoices for human review (new supplier, odd amount, ambiguous description).

The point isn't that AI gets 100% right. The point is that it gets 90% right and honestly tells you when it's not sure about the other 10%.

2. Answering the same questions over and over

"When is payroll going out?". "Can you send me last quarter's VAT return?". "How much self-employed contribution do I owe this month?". "Did you get my electricity invoice?".

If you actually count them, 60-70% of the WhatsApps and emails coming into an accounting firm are variations of these four questions. An agent connected to the accounting software answers them by itself, 24/7, no waiting.

I wrote a post a few weeks ago about how exactly you build that (here it is), so I won't repeat myself. But the important bit: the agent doesn't make things up. If it doesn't have the data in the system, it says "let me pass this on to your accountant" and opens a ticket. No hallucinations, no half-answers.

3. Reminders and tax deadline alerts

This is one of the processes where automation is almost mandatory, and yet I'm still surprised how many firms do it by hand or, worse, don't do it at all.

The Spanish tax office deadlines are what they are. 20th of January, April, July and October, VAT return. 30th of each month, withholdings. And so on. What changes is which client has which obligation, and that lives in the accounting software.

An automated process that:

1. Reads each client's obligations from A3
2. Cross-references with the tax calendar
3. Sends a personalised WhatsApp or email seven days before ("Hi Pedro, just a reminder your Q3 VAT return is due on the 20th. I need any missing invoices before the 15th")
4. If no answer, follows up three days later
5. If still no answer, escalates to the human accountant

That eliminates the angry client calls about "nobody warned me". And it also eliminates the 8pm rush on the 19th.

4. Drafting tax returns and forms

Be careful with this one, because this is where it's easiest to sell snake oil. I'm not telling you AI files the VAT return by itself. I'm telling you it prepares the draft.

If the quarter's entries are correctly posted (and if you've applied point 1, they are), generating the draft of the 303, 130, 111 or 115 forms is just a calculation. No judgement required. Judgement comes in when there's something odd: a misclassified intra-EU transaction, a questionable deductible VAT, a provision.

What I do with my clients: the system generates the draft on the 1st of the filing month. The accountant opens the tool, sees the draft with a summary saying "there are three movements worth a look", reviews those three, signs and files. What used to be a full morning is now half an hour.

The human is still accountable. But they only work on the exceptions, not on the 95% that's mechanical.

5. New client onboarding

This one gets underestimated a lot. When a new client joins the firm there's a pile of admin: ask for ID copy, digital certificate, register the form 036, power of attorney, gather bank details, set them up in the software, configure their obligations calendar, send the engagement letter.

It's a process that repeats identically every time. And it's done by hand every time. Someone spends between two and four hours on each new client.

An automated flow can:

• Send the client a form covering every piece of data you need
• Validate the tax ID against the tax office
• Generate the engagement letter pre-filled and send it for signature (Signaturit, DocuSign, whatever you use)
• Create the client record in the accounting software
• Set up the obligations calendar based on their tax regime
• Send the client a welcome message with their upcoming deadlines

The accountant only steps in at the end, to check everything is right and sign off. From four hours to twenty minutes.

Where I would NOT remove the human

For the sake of honesty, because otherwise this sounds like I'm flogging something: there are things I don't automate, and I wouldn't even if asked.

• Tax inspections. Judgement, context and knowing the client are essential. AI can help prepare documentation, but not make the decisions.
• Complex tax advice. Corporate structures, planning, inheritance. That's what the client pays a good accountant for. Hands off.
• The difficult conversation. When you have to tell a client they owe more than expected, or that they've done something wrong. That call is made by a person. Always.

What to do if this sounds familiar

If you run an accounting firm and reading this you're thinking "yes, that's exactly what happens to us", the good news is you don't have to do everything at once. The normal thing is to start with one (I almost always start with 1 or 2, depending on where it hurts most) and, once that works, tackle the next.

Three months to have all five processes running is a realistic target for a mid-sized firm. And yes, I mean three months of actual implementation, not three months of meetings.

If you want to talk about how something like this would fit your specific firm, drop me a line. Thirty minutes, no commitment. I'll tell you what I see and, if it doesn't fit, I'll tell you that too.