What's left of the job when the reading leaves it

01The number that sounds like a threat

Earlier this year we ran a quiet experiment at a UK accountancy firm. We took live jobs, the kind that sit on someone's desk every week, and ran them two ways at once. The firm's best accounts preparation people did them the normal way. The AI system I'd built did them alongside, with a person in the loop throughout.

The system did about 80% of the work in about a quarter of the time, and the figures matched.

I know how that sounds if your job is accounts preparation. So I've written a talk for the staff, and most of it is about the other 20%.

02What's in the 80

The 80% is the reading. Opening twelve bank statements. Typing out hundreds of transactions. Adding them up and checking the totals against the printed ones. Drafting the schedules.

I ask the room an honest question at this point: does anyone love that part? Nobody gets their professional letters for being fast at typing transactions. It's the part of the job that was always going to go to whatever could do it cheapest, and for years that was a person.

03What's in the 20

There's a payment of four grand coming in every month from a J. Smith. The system can see it. It can't know whether that's rent, or the director quietly repaying a loan, or something else. The accountant knows, because they met the client and they remember what was said in March.

The profession already has a word for that, which is judgement. It's what the qualification was about all along. It spent years buried under data entry.

04The firm already has the right shape

A job in a practice runs like this today. A junior does the legwork. A manager reviews it, sends the odd bits back, and takes the real questions upward. A partner makes the calls and signs. Nobody asks the partner to do the bookkeeping, because that would be a mad use of their time.

The system I build copies that structure in software. A cheaper model does the legwork. A more capable model routes the work, reviews it and escalates. The person sits where the partner sits: they hold the liability, supply the client knowledge, and sign.

For the people in the room, that means each of them gets a junior. It does the legwork fast and it doesn't get bored on statement nine. They become the reviewer. They look at what comes back, catch what looks off, and answer the questions only a person can answer. The talk is called "You're not being replaced, you're being promoted", and this is what the title means. Everyone moves up a level.

05The signature stays

Responsibility doesn't move. The rules of the profession are clear that a machine can't carry the responsibility for an engagement. A person signs, and a person answers for it.

I tell the staff that's their job security in one sentence. The signature has to mean something, so someone qualified has to stand behind it.

06The permanent file, read every time

This is the part most people haven't heard about, and it's the part I like most.

When the system asks about the four grand from J. Smith and the accountant says "that's the director's loan", it offers to write that down. The accountant approves the exact wording. It's saved with the date and where it came from. A later correction goes in as a new entry and the old one stays on the record. Next quarter, the system doesn't ask.

Accountants have kept this for decades and call it the permanent file: the folder of everything known about a client that doesn't change year to year. This version gets read on every job and doesn't get lost in a drawer.

It learns the accountant as well. How they like things presented. Whether they want the exceptions first. Two people's systems slowly stop being the same system, because each has been trained by a different professional.

That matters for the "will this make me replaceable" worry. Six months in, the system is good because of the corrections one person fed it. That training belongs to them and the firm. It doesn't belong to a software company and a competitor can't download it. They become the one person their system works best for.

07Why it doesn't run to 100

People ask why we stopped at 80. It's on purpose. If the system did everything, the reviewer would see twenty correct outputs in a row and stop really looking at the twenty-first. Leaving the person a real piece of work is what keeps the checking honest. I've written about that choice separately in Why we stopped at 80%.

08What the job asks for now

The talk ends on three habits. If you can brief a junior and review their work, you already have them. Nobody needs to learn to code.

Tell it things early. The stuff you'd tell a junior on day one: this client's a bit chaotic, the March invoices always land in April, watch out for the personal account. Every bit of that makes the output better and saves a question later.

Correct it like you'd correct a junior. When it gets a categorisation wrong, don't fix the number and move on. Tell it, and let it save the lesson. Two minutes now buys every future quarter.

Never rubber-stamp. Everything it produces is a draft, with every figure traced back to the document, page and line it came from, so checking is fast. The day people start waving things through is the day the whole model breaks. The reviewer's scepticism is part of how the system works.

09What I don't know yet

This is one firm and one benchmark, plus one full job recorded on the newest build. The system is the firm's own product and it hasn't been sold to anyone. I haven't given the talk yet, so I don't know how it lands with the people it's about.

The hard question is whether this cuts jobs. My honest answer is that it changes what the jobs are. The capacity it frees is the advisory work clients keep asking for and the firm keeps not having time for. I believe that, and I can't prove it from here. I also don't have a good answer yet for where new juniors learn the job if the system does the legwork they used to learn on.

10Every generation gets one of these

Calculators were going to replace accountants. Then spreadsheets were. Then cloud bookkeeping. Each time the mechanical part of the job shrank, the advisory part grew, and the accountants who leaned in ended up more valuable.

I think this is the same moment, only bigger. The reading and the typing are leaving the job. Knowing the client, spotting what's odd, making the call and signing for it are staying. The new junior starts whenever you're ready to start training it.