You have seen the slide. Someone at a conference puts up "autistic employees are 140% more productive," the room nods, and everyone goes back to running the same 45-minute whiteboard interview that filtered those people out three years ago.
I went looking for the source of that number, and of the four or five others that circulate with it. Most of them do not survive contact with a search engine. That bothers me because the underlying problem is real and well documented, and propping it up with marketing statistics makes it trivially easy for a sceptical engineering manager to dismiss the whole conversation.
So: what actually holds up, and what should you change on Monday?
The numbers that fall apart
"Autistic employees are 140% more productive." This traces back to JPMorgan Chase's Autism at Work pilot in 2015. The pilot was a handful of people, four or five depending on which account you read, in one back-office role, measured over six months against colleagues who had been doing the same job for three to ten years. The headline figure from that cohort was 48% faster. The 90–140% range comes from internal claims about specific roles, reported second-hand, never published, never peer reviewed. Four or five people. One task type. No control for the fact that the pilot hires were screened for exactly that task.
It is still spreading. Pull up any "neurodivergent hiring in 2026" listicle, and the 90–140% claim is right there, sourced to nothing.
Quote it in a pitch to a CFO and the first person in the room who checks will win the argument, and they will win it against your entire point.
"3.7% of developers are autistic, versus 1% of the population. Four times overrepresented." The 3.7% comes from a US developer portal called Developer Pitstop, repeated by auticon, and then into everyone's slide deck. Stack Overflow's own 2020 survey put it at 2.3%. Both are self-selected samples of people who answer developer surveys, and as far as I can tell Stack Overflow has not published a neurodiversity breakdown since 2022.
The denominator is worse. The CDC's most recent ADDM data puts prevalence at 1 in 31 eight-year-olds, about 3.2%, up from 1 in 36 in the previous cycle (MMWR Surveillance Summaries, April 2025, using 2022 surveillance data). Diagnosis rates in adults are lower mainly because nobody was screening adults thirty years ago.
If you are hiring in Ireland, there is now a local denominator. The CSO's Irish Health Survey 2025, published in May 2026, found that 7.7% of males aged 15 to 24 have an autism diagnosis, against 4.5% of females, and that 38.2% of women in that age band report a diagnosed or suspected neurodivergent condition. Those are the people entering your graduate pipeline.
So the "four times" multiplier compares a self-reported developer figure against a general-population figure that has roughly tripled since the comparison was first written down. Drop the multiplier. It is doing no work for you.
"Only 22% of autistic adults in the UK are in paid work." Stale rather than fabricated: that was ONS data from 2021, and the House of Commons Library now puts it at 34.0% for 2024/25, against 55.3% for all disabled people and 82.0% for non-disabled people. Still the worst rate of any disability group, so the current number makes your case without you having to be five years out of date.
"Up to 85% of autistic people in Ireland are unemployed or underemployed." This one is closer to home, and it is the Irish version of the same problem. It appears in AsIAm campaign material, in the Insurance Ireland employer charter, and in the September 2025 coverage of the Ibec and AsIAm Roadmap for Autism and Employment, usually as "up to 85%" or "over 80%," attributed to "global research." I have not been able to find the study. What is on the record: Ireland's disability employment rate is 32.6%, roughly 20 points below the EU average, and CSO figures quoted in Irish coverage put 16% of autistic people in full-time work and 32% in some form of paid work. Different claims, different denominators. If you use the 16/32 split, link the CSO release rather than a press piece.
The numbers that survive
The employment gap is the finding, and it replicates. 34% employment against 82% for non-disabled adults, with the Buckland Review (February 2024) adding that autistic graduates are twice as likely to be unemployed 15 months after finishing as non-disabled graduates. Only 36% are in full-time work in that window, from the AGCAS What Happens Next? 2022 data. Graduates. People who already cleared a technical degree.
The pay gap survives too, and it is the number I would put next to the employment one: autistic employees earn around 27.9% less than non-disabled colleagues, the widest gap of any disability group in the UK data.
The desire to work is there: the National Autistic Society's figure of 77% of unemployed autistic people wanting a job has held up across surveys for a decade.
The interview is a measurable choke point. The number everyone reaches for here, 11% of applicants who disclosed on their application were offered any interview adjustment and 3% an alternative process, comes from the NAS surveys of 2016, restated in a 2025 editorial in Autism by NAS's Tim Nicholls. Say 2016 when you quote it. The current comparative work is Davies et al. (2023) in Autism 27(6), which compared autistic, other neurodivergent and neurotypical adults' experiences of UK hiring processes directly.
Better than either, there is an actual experiment. Maras et al. (2021), also in Autism, put 50 adults, 25 autistic and 25 not, through two mock interviews six months apart. Employment experts blind to diagnosis rated the answers. In the first round, the autistic candidates were rated less favourably. In the second round, with questions rewritten to ask explicitly for specific details and examples rather than expecting the candidate to infer what was wanted, ratings improved for everyone, improved most for the autistic candidates, and the gap narrowed. That is a controlled result about a change you can ship this week, and it beats any productivity anecdote.
The cost objection is dead, but check which edition of the JAN report you are quoting, because I got this wrong myself. JAN surveyed 26,028 employers who contacted it between 2019 and 2024 and received 5,406 responses. Of the 1,425 who gave cost data, 61% said the accommodation cost nothing, 33% had a one-time cost with a median of $300, and 6% had an ongoing cost with a median of $2,400 a year (report updated September 2025). The $3,750 annual figure in circulation is from the previous edition covering 2019 to 2022. Both were right for their vintage. Only one is current.
On the strengths side, be careful. The peer-reviewed work points the other way. Verma, Cruz and Liebel analysed the 2022 Stack Overflow survey, comparing professional engineers with autism (n=374), ADHD (n=1,305) and dyslexia (n=363) against neurotypical engineers, and found that neurodivergent engineers report more difficulty at work. Superhuman output does not show up in the data. The paper appeared as a preprint in June 2025 and was published at SEAA 2025 (Springer LNCS 16083), so you can now cite it as reviewed work rather than as an arXiv drop. Alongside it, Gama, Liebel and colleagues published a grounded-theory study at ICSE-SEIS 2025 on how cognitive dysfunctions affect the performance of developers with ADHD and autism, which is the closest thing we have to a mechanism rather than a vibe.
Interview studies with autistic software engineers do consistently surface pattern recognition, sustained focus and tolerance for detail work as real strengths. They also surface a finding people skip: communication difficulty extends into the code itself, into naming, abstraction boundaries and comments, and not only into standups.
The honest argument for hiring is that the process you use to reject people is broken. The productivity dividend framing turns a person into a line item, and it collapses the moment someone has an average quarter.
What to change in the loop
Everything below is free, and most of it improves your signal on every candidate you interview. That last part is not a hopeful aside: it is what Maras et al. found, since the adapted questions lifted the non-autistic candidates too.
- Send the questions in advance. The technical content of your interview is not a secret worth protecting. You are testing whether someone can build software, not whether they can recover from ambush.
- Ask for what you actually want. Instead of "tell me about a challenge you faced," ask for the situation, what you personally did, and what the measurable outcome was. This is the single adaptation with experimental support behind it.
- Offer a take-home or a pairing session as a stated alternative, on the job ad, before anyone has to ask for it. Asking for an adjustment costs the candidate a disclosure they may not want to make.
- Split a four-hour loop into two shorter sessions on different days. Sensory and social load compounds; hour four is measuring stamina.
- Kill the "culture fit" round, or define it against written behaviours. Unstructured chat over coffee is a similarity test with a job title.
- State the format up front: who is in the room, how long, what you will ask, whether cameras are expected.
Day to day, the changes that matter are boring: agendas before meetings, decisions written down after them, explicit deadlines instead of "when you get a chance", async by default, and a real quiet space or a genuine remote option rather than a hot desk beside the sales floor.
One artefact I would steal outright. Frank Ray, a UK engineer diagnosed at 40 after twenty years of contracts ending badly, published a "How we work" document for his clients and found it attracted better clients rather than fewer. Put one in your repo:
# How this team works
## Communication
- Slack is async. No reply expected within the hour.
- Anything decided in a call gets written into the ADR or the ticket. If it isn't written, it wasn't decided.
- @here is for production incidents.
## Meetings
- Agenda in the invite or the meeting is declined, no offence taken.
- Cameras optional. Always.
- No surprise attendees.
## Work
- "Urgent" means today. Say the date otherwise.
- Code review is about the code. Suggestions are prefixed `nit:` when optional.
- Deep work blocks in the calendar are load-bearing. Don't book over them.
None of that is an autism accommodation. It is how a functioning distributed team already operates, which is the point. The adjustments that get labelled special are mostly competent engineering management applied consistently.
The Irish and EU angle nobody puts on the slide
The research above is overwhelmingly American and frames everything around the ADA, which is useless to you if you are hiring in Dublin. Here the framework is section 16 of the Employment Equality Acts 1998–2015, and it is a positive duty: appropriate measures, unless they impose a disproportionate burden. It covers job applicants, not only employees. The governing authority is the Supreme Court in Nano Nagle School v Daly, which held that duties can be stripped out of a role as an accommodation, while also making clear that the duty is not infinite.
The WRC reads the disproportionate-burden defence narrowly, and the recent decisions are worth knowing:
- Mary Tracy v Smurfit Kappa Ireland (Edco), January 2025. €64,000 across two decisions, largely for never exploring or discussing accommodations at all. IHREC provided the legal representation. Tracy herself had pointed out to her employer that state funding was available.
- Paul Hill v Department of Social Protection, April 2026. €30,000, with discrimination found across a twelve-year period. The Department that lost is the one that administers the State's own workplace accommodation programme.
- Lukasz Swiercz v Lidl Ireland, ADJ-00059764, April 2026. €28,000 for refusing a return to work on light duties.
The exposure is real: compensation runs up to two years' remuneration or €40,000, whichever is greater.
And the Irish cost objection has a state answer that no American report can give you. Work and Access, which replaced the Reasonable Accommodation Fund and the Disability Awareness Support Scheme, funds a workplace needs assessment up to €2,500, workplace adaptation up to €25,000, and disability equality and inclusion training up to €20,000, with an equipment grant on top. Private sector only, and the public sector is excluded, which is its own conversation.
I wrote that up separately, because it deserves more than four paragraphs: Reasonable Accommodation in Irish Tech: What Section 16 Actually Requires.
The part senior engineers get wrong
There is a trap on the other side of hiring that the corporate programme pages never mention. Sustained focus produces output, output gets praised, and an autistic engineer can spend three years being the person who ships while quietly missing that promotion to staff runs on influence, disagreement handled well, and knowing which meeting to be in. Managers who benefit from the output rarely volunteer this. Burnout arrives before the title does.
If you manage someone like this, say the promotion criteria out loud, in writing, with examples. The implicit ones are the whole barrier.
What I actually want to know: has anyone reading this changed their interview loop and measured what happened to the pipeline? Or dropped the whiteboard round and found the signal got better? I have opinions about which of the changes above matter most, and almost no data on which ones teams actually keep after six months.
Bruno Souza
Senior Backend Engineer, Dublin
