Depression in Autistic Adults: Why It Can Look Different and Get Missed
Last reviewed: 10/17/2026
Reviewed by: Dr. Kiesa Kelly
Depression in autistic adults is common, and it can be easy to miss. The things that often signal depression, such as pulling away from people, sleeping differently or showing less on your face, can also be part of being autistic. Many autistic adults also find it hard to put a name to how they feel. So depression can settle in for months while you, your family and even your clinicians read it as "just how you are." If you want a quick check on your mood right now, the PHQ-9 depression screener takes a few minutes. It is a screener, not a diagnosis. If you mark anything other than "not at all" on the question about thoughts of self-harm, call or text 988, or call 911 if you are in immediate danger.
This article is for autistic adults, including people who were identified later in life, and for the people close to them. It explains how depression can look different, why it gets missed and how a careful evaluation sorts it out.
In this article, you'll learn:
How common depression is in autistic adults, and what the numbers can and cannot tell you
The ways depression can show up differently, including when low mood is hard to name
Why overlap with autism, masking and standard questionnaires can hide it
How a clinician tells depression apart from autism itself and from autistic burnout
What helps, and a rule of thumb for when to get evaluated
If you are having thoughts of suicide, you do not need to sort out the label first. Call or text 988, or chat at 988lifeline.org, to reach the 988 Suicide & Crisis Lifeline, or call 911 if you are in immediate danger [1][2].
The short answer: depression is common in autistic adults and often looks different
Depression is one of the most common mental health conditions in autistic adults [3]. A large review of studies of autistic adults estimated that about 23%, roughly 1 in 4, were experiencing depression when they were studied, counting both diagnosed depression and high scores on depression questionnaires. About 37% had experienced depression at some point [4]. Most of those studies drew on clinic samples, and the estimates varied a lot from study to study, so the true rate in the wider community is uncertain [4].
The diagnostic criteria for depression are the same for autistic adults as for anyone else. Depression means a low or empty mood, or a loss of interest or pleasure in most activities, most of the day, nearly every day, for at least two weeks, along with other symptoms [2]. What differs is how it can look from the outside, how hard it can be to describe from the inside, and how carefully the assessment needs to be done [5].
🧩 Key takeaway: Depression is common in autistic adults. The criteria are the same, but it can look different and be harder to name, which is why it gets missed.
Three misconceptions about depression in autistic adults
"The withdrawal and flatness are just my autism." In reality, social withdrawal, sleep and appetite changes, flat affect and reduced eye contact can be part of autism and also signs of depression [3][6]. Researchers describe this overlap as a source of diagnostic overshadowing, where depression is put down to autism [3]. In our clinical experience, the most useful question is not "is this autistic?" but "is this new or worse for me?"
"If I can't say I feel sad, it can't be depression." In reality, depression does not require you to describe sadness. Loss of interest or pleasure counts as a core symptom on its own [2]. Many autistic adults also have alexithymia, a difficulty identifying and describing feelings. In one analysis, about half of autistic participants scored in the alexithymia range on a common questionnaire, compared with about 5% of neurotypical comparison participants [7]. Our article on alexithymia and autism explains what that experience is like.
"A depression questionnaire will settle it." In reality, a screener is a starting point. The PHQ-9 total score held up in a large study of autistic adults, but its items grouped differently than in non-autistic adults [8]. Some items, such as trouble sleeping or moving slowly, may be more likely to be endorsed because of autistic traits, even without depression [3]. Depression is a clinical diagnosis made through an interview and history, not a score [9]. Our guide to PHQ-9 scoring and interpretation explains what each score range can and cannot tell you.
How depression can present in autistic adults
Changes in special interests and routines
Clinicians and researchers have described the loss of absorption in a special interest as a possible sign of depression in autistic adults [3]. That description comes from older clinical reports, not large studies, so treat it as a clue, not a rule. Depression can also go the other way. An older review noted that behaviors associated with autism, such as obsessionality and self-injury, may increase during an episode of depression [6]. Any new or increasing self-injury deserves prompt attention: call or text 988, or call 911 in an emergency [1][2]. In our clinical experience, the signal is a change from your own pattern: an interest that used to absorb you now feels flat, or routines that used to steady you start to fall apart or harden into something you cannot bend at all.
Here is a composite example, not a real client. Consider a 41-year-old woman who was identified as autistic two years ago. For as long as she can remember, she has spent her evenings deep in her collection of vintage maps, cataloging and researching them. Over the past two months she has stopped. The maps sit untouched, and when she tries to start, it feels pointless. She is sleeping later, skipping meals she used to plan carefully and canceling the one weekly call she enjoyed. When her sister asks how she is, she says "fine" and means it as far as she can tell. Her autistic traits have not changed, but her own pattern has, and that change is worth an evaluation.
Withdrawal, flat affect and shutdown: what is new
Withdrawal and a flat expression are classic overlap signs, because they can be lifelong features of how some autistic people relate and also signs of depression [3]. The distinction a clinician looks for is change. Pulling back from people you have always found draining is different from pulling back from the few people and activities that used to feel safe and good. A face that has always shown less is different from a sense that everything inside has gone gray. In our clinical experience, shutdowns that come more often, last longer or follow smaller demands than usual can also be part of a depressive picture, though this has not been studied directly.
Or consider another composite: a 28-year-old man who has always kept to himself outside work. Lately he leaves work and goes straight to bed. He has stopped the online game he played with two friends every Thursday for years, and he has not replied to them in weeks. He is not sure he feels sad. He describes feeling "heavy" and "like nothing matters." He assumed it was burnout, and he is not sure. What stands out is the change from his own baseline: the game he stopped, the friends he stopped answering, the sense that nothing matters. A change like this is worth an evaluation that looks at both burnout and depression.
Alexithymia: when low mood is hard to name
In our clinical experience, when feelings are hard to identify, depression can show up first as something else: tiredness, irritability, physical aches, sleep changes or just a sense that things are "off." In a study of 281 adults diagnosed with autism at an adult diagnostic clinic, difficulty identifying feelings was the strongest predictor of depressive symptoms, stronger than autistic traits, and the same pattern held in people who were not diagnosed autistic [10]. That study measured links at one point in time, so it cannot show that alexithymia causes depression [10]. It does suggest that asking only "do you feel sad?" can miss a lot.
🔍 Key takeaway: In our experience, the key is change from your own baseline. Fading interests, new withdrawal or more frequent shutdowns can be worth checking even if you cannot describe the feeling behind them.
Why depression gets missed in autistic adults
Symptom overlap with autism itself
The same features can belong to autism or to depression [3][6]. Communication differences can also mask the symptoms of depression [6]. Confusion can run in both directions. In one online survey, autistic and possibly autistic adults were more likely than others to disagree with mental health diagnoses they had received, often because they felt clinicians had confused autistic traits with a mental health condition [11]. That survey covered mental health diagnoses in general, not depression alone, but it shows how easily the two get tangled and why an autism-informed assessment matters.
Masking and "you seem fine"
Masking, or camouflaging, means using strategies to hide or compensate for autistic characteristics in social situations. In a study of 305 autistic adults, more camouflaging was linked with more symptoms of depression, though only slightly once autistic traits and age were taken into account, and more strongly with anxiety [12]. The study could not tell which came first [12]. In our clinical experience, a person who has spent years appearing to cope can also appear to cope with depression, which is one more reason for a clinician to ask directly and to ask people who know you well.
Screeners like the PHQ-9: useful, with caveats
The PHQ-9 asks about the core symptoms of depression over the past two weeks. In autistic adults, its items grouped into two clusters, physical symptoms and thoughts and feelings, instead of the single cluster seen in comparison adults. The total score was still supported [8]. A 2018 review found very little evidence about how well standard depression questionnaires work for autistic adults, and it noted that they could both overcount and undercount: sleep and movement items may pick up autistic traits, while literal wording and alexithymia can make items like "feeling down" hard to answer [3].
📋 Key takeaway: The PHQ-9 can be a reasonable starting point for autistic adults, but it is a screener. A clinician should read it alongside your history, not instead of it.
Depression vs. autistic burnout
Autistic burnout is described as long-term exhaustion, loss of skills or function and lower tolerance for stimulation, typically lasting three months or more, linked to chronic stress and a mismatch between demands and support [13]. The researchers concluded that it appears to be distinct from clinical depression, though participants noted the two can occur together [13]. The two can be hard to tell apart, and the research on burnout is still developing. Our article on autistic burnout recovery covers the differences in depth, and the Autistic Burnout Construct (ABO) screener can help you put structure on what you are noticing. If you are unsure which one you are dealing with, an evaluation can look at both.
How an evaluation sorts it out
Depression is diagnosed through a clinical interview, not a questionnaire score. That interview covers your symptoms, medical history, family history, social history and substance use, and information from family or friends is an important part of it [9]. Under the DSM-5, the diagnosis requires five of nine symptoms, one of which must be depressed mood or loss of interest, with real impairment [9]. Medical causes, such as thyroid problems or medication effects, should be ruled out [2].
For autistic adults, a few things make the assessment more accurate. UK guidance for depression suggests asking the person about symptoms directly, using whatever way of communicating works best for them, and asking a family member or caregiver, when communication differences make symptoms hard to describe [5]. It also says assessment should not rely on a symptom count alone, but should consider severity, history, duration and how much the symptoms affect daily life [5]. UK autism guidance says a comprehensive autism assessment should check for co-occurring conditions, including depression, and assess the risk of self-harm [14]. If you are not sure whether you are autistic, the AQ-10 autism screener can help you decide whether a fuller psychological assessment makes sense.
Questions worth asking any evaluator:
Scope: "Will you assess depression, anxiety and autistic burnout together, and consider autism itself if I have not been assessed?"
Methodology: "How will you tell my lifelong autistic traits apart from new changes, and how do you account for masking?"
History: "Can someone who knows me well give input, and how do you gather history if I find it hard to describe my feelings?"
Output: "Will I leave with a clear answer, written recommendations and a treatment plan adapted for autistic adults?"
What helps: adapted therapy and supports
The good news is that depression is treatable [6]. Researchers recommend that autistic people get access to the same evidence-based mental health treatments available to non-autistic people, delivered in a person-centered way [15]. UK autism guidance says treatment for depression in autistic adults should follow the usual depression guidance, with adaptations [14]. Those adaptations include [14]:
A more concrete and structured approach, with more written and visual information
More focus on changing behavior, using behavior as the starting point
Making rules explicit and explaining their context
Plain language, with less metaphor and fewer hypothetical situations
Involving a family member, partner or support person, if you agree
Regular breaks, and using your special interests in therapy where possible
The research on outcomes is still limited. A meta-analysis found that cognitive behavioral therapy produced a small reduction in depressive symptoms in autistic adults [16]. A review of 71 trials found that all were at high risk of bias, and it concluded that some forms of CBT and mindfulness therapy may help but that more high-quality evidence is needed [15]. A UK pilot trial showed that a structured, behavior-focused guided self-help program could be adapted for autistic adults with depression and was well received, though it was not designed to test how well it worked [17]. For medication, UK guidance suggests following standard depression guidance while being aware that autistic people may be more sensitive to side effects, and considering a low starting dose [14]. Medication decisions belong with a prescriber.
🛠️ Key takeaway: Standard depression treatments are recommended for autistic adults, and UK guidance suggests making therapy more concrete, structured and literal. The research is still limited.
A rule of thumb
If something has changed from your own baseline for two weeks or more, such as an interest that has gone flat, new withdrawal from people or activities you enjoyed, or more frequent shutdowns, take it seriously and screen your mood. If you have felt low, flat or empty for so long that it feels like your normal, take that seriously too, and ask someone who knows you well what they have noticed.
If the change has lasted longer, is getting worse or is affecting work, relationships or self-care, ask for an evaluation from a clinician who understands autism.
If you are unsure whether it is burnout, depression or both, do not wait to sort it out alone. An evaluation can look at all of them together. If either comes with thoughts of suicide or self-harm, follow the next point now.
If you have thoughts of suicide or self-harm, reach out now. In a large Swedish registry study, autistic people without intellectual disability had a much higher risk of suicide than matched people in the general population [18], so these thoughts deserve a same-day response. Call or text 988, chat at 988lifeline.org, or call 911 in an emergency [1][2].
Next step: getting support
Depression can be quiet in autistic adults, especially when it hides behind traits you have always had or feelings that are hard to name. Noticing a change is a real and useful first step. If you would like to talk it through with us, you can contact our team directly.
Not sure whether it's depression?
If something has shifted and you cannot tell why, therapy with a clinician who understands autism can help you sort out whether depression is part of the picture and what kind of support would fit how you think and communicate.
Frequently Asked Questions
Is depression more common in autistic adults?
Yes. A large review of studies of autistic adults estimated that about 23%, roughly 1 in 4, were experiencing depression when they were studied, counting both diagnoses and high questionnaire scores, and about 37% had experienced it at some point. Most of those studies drew on clinic samples and the estimates varied widely, so the exact community rate is uncertain, but the authors found rates higher than would be expected.
Can the PHQ-9 be used if you're autistic?
Yes, as a starting point. In a study of autistic adults, the PHQ-9 total score held up, although its items grouped differently than in non-autistic adults. Some items, like sleep changes or moving slowly, can reflect autistic traits rather than depression, and literal wording can make mood items hard to answer. A clinician should read your score alongside your history and any change from your usual baseline. If you have any thoughts of self-harm, whatever your total score, call or text 988, or call 911 in an emergency.
How do I know if it's depression or autistic burnout?
You may not be able to tell on your own, and the two can overlap. Autistic burnout is described as long-term exhaustion, loss of skills and lower tolerance for stimulation, typically lasting months, tied to demands that outstrip support. Depression centers on low mood or loss of interest most of the day, nearly every day, for at least two weeks. Because burnout and depression can occur together and recovery from burnout can take months, it is worth getting an evaluation that looks at both rather than waiting to see whether rest helps.
Does therapy for depression work for autistic adults?
It can. Reviews have found that cognitive behavioral therapy can reduce depressive symptoms in autistic adults, though the effect is small and most trials had a moderate or high risk of bias. UK guidance recommends standard depression treatments delivered with adaptations, such as a more concrete and structured approach, written and visual materials, plain language and involving a support person if you agree.
Why is depression hard to spot when I can't name my feelings?
Because many depression questions ask you to describe your mood. In one analysis, about half of autistic participants scored high on a measure of alexithymia, a difficulty identifying and describing feelings. Clinicians often find that depression then shows up first as fatigue, irritability, aches, sleep changes or loss of interest, which counts as a core symptom on its own. Telling a clinician what has changed in your days is often more useful than naming the feeling.
About the Author
Dr. Kiesa Kelly is a clinical psychologist and the founder of ScienceWorks Behavioral Healthcare. She earned her PhD in clinical psychology, with a concentration in neuropsychology, from Rosalind Franklin University of Medicine and Science, and completed practica, internship and an NIH-funded postdoctoral fellowship at the University of Chicago, the University of Wisconsin, the University of Florida and Vanderbilt University. As a neuropsychologist by training, she has more than 20 years of experience with psychological assessment.
Her recent training includes neurodiversity-affirming ADHD and autism assessment for previously undiagnosed adults, including individual consultation with Dr. Paige Victorine. Her earlier clinical training included interpersonal and cognitive behavioral therapy for adults with major depression and generalized anxiety disorder, along with intake evaluations that ended in diagnoses and treatment recommendations.
References
1. 988 Suicide & Crisis Lifeline. Accessed October 17, 2026. https://988lifeline.org/
2. National Institute of Mental Health. Depression. NIH Publication No. 24-MH-8079. Revised 2024. Accessed October 17, 2026. https://www.nimh.nih.gov/health/publications/depression
3. Cassidy SA, Bradley L, Bowen E, Wigham S, Rodgers J. Measurement properties of tools used to assess depression in adults with and without autism spectrum conditions: a systematic review. Autism Res. 2018;11(5):738-754. https://doi.org/10.1002/aur.1922
4. Hollocks MJ, Lerh JW, Magiati I, Meiser-Stedman R, Brugha TS. Anxiety and depression in adults with autism spectrum disorder: a systematic review and meta-analysis. Psychol Med. 2019;49(4):559-572. https://doi.org/10.1017/S0033291718002283
5. National Institute for Health and Care Excellence. Depression in adults: treatment and management [NG222]. Published June 29, 2022. Accessed October 17, 2026. https://www.nice.org.uk/guidance/ng222/chapter/Recommendations
6. Stewart ME, Barnard L, Pearson J, Hasan R, O'Brien G. Presentation of depression in autism and Asperger syndrome: a review. Autism. 2006;10(1):103-116. https://doi.org/10.1177/1362361306062013
7. Kinnaird E, Stewart C, Tchanturia K. Investigating alexithymia in autism: a systematic review and meta-analysis. Eur Psychiatry. 2019;55:80-89. https://doi.org/10.1016/j.eurpsy.2018.09.004
8. Arnold SRC, Uljarević M, Hwang YI, Richdale AL, Trollor JN, Lawson LP. Brief report: psychometric properties of the Patient Health Questionaire-9 (PHQ-9) in autistic adults. J Autism Dev Disord. 2020;50(6):2217-2225. https://doi.org/10.1007/s10803-019-03947-9
9. Bains N, Abdijadid S. Major depressive disorder. In: StatPearls. Treasure Island (FL): StatPearls Publishing; 2023. https://europepmc.org/article/MED/32644504
10. Bloch C, Burghof L, Lehnhardt FG, Vogeley K, Falter-Wagner C. Alexithymia traits outweigh autism traits in the explanation of depression in adults with autism. Sci Rep. 2021;11(1):2258. https://doi.org/10.1038/s41598-021-81696-5
11. Au-Yeung SK, Bradley L, Robertson AE, Shaw R, Baron-Cohen S, Cassidy S. Experience of mental health diagnosis and perceived misdiagnosis in autistic, possibly autistic and non-autistic adults. Autism. 2019;23(6):1508-1518. https://doi.org/10.1177/1362361318818167
12. Hull L, Levy L, Lai MC, Petrides KV, Baron-Cohen S, Allison C, et al. Is social camouflaging associated with anxiety and depression in autistic adults? Mol Autism. 2021;12(1):13. https://doi.org/10.1186/s13229-021-00421-1
13. Raymaker DM, Teo AR, Steckler NA, Lentz B, Scharer M, Delos Santos A, et al. "Having all of your internal resources exhausted beyond measure and being left with no clean-up crew": defining autistic burnout. Autism Adulthood. 2020;2(2):132-143. https://doi.org/10.1089/aut.2019.0079
14. National Institute for Health and Care Excellence. Autism spectrum disorder in adults: diagnosis and management [CG142]. Published June 27, 2012; last updated June 14, 2021. Accessed October 17, 2026. https://www.nice.org.uk/guidance/cg142/chapter/Recommendations
15. Linden A, Best L, Elise F, Roberts D, Branagan A, Tay YBE, et al. Benefits and harms of interventions to improve anxiety, depression, and other mental health outcomes for autistic people: a systematic review and network meta-analysis of randomised controlled trials. Autism. 2023;27(1):7-30. https://doi.org/10.1177/13623613221117931
16. Wichers RH, van der Wouw LC, Brouwer ME, Lok A, Bockting CLH. Psychotherapy for co-occurring symptoms of depression, anxiety and obsessive-compulsive disorder in children and adults with autism spectrum disorder: a systematic review and meta-analysis. Psychol Med. 2023;53(1):17-33. https://doi.org/10.1017/S0033291722003415
17. Russell A, Gaunt DM, Cooper K, Barton S, Horwood J, Kessler D, et al. The feasibility of low-intensity psychological therapy for depression co-occurring with autism in adults: The Autism Depression Trial (ADEPT) - a pilot randomised controlled trial. Autism. 2020;24(6):1360-1372. https://doi.org/10.1177/1362361319889272
18. Hirvikoski T, Mittendorfer-Rutz E, Boman M, Larsson H, Lichtenstein P, Bölte S. Premature mortality in autism spectrum disorder. Br J Psychiatry. 2016;208(3):232-238. https://doi.org/10.1192/bjp.bp.114.160192
Disclaimer
This article is for informational and educational purposes only and is not a substitute for professional medical or mental health advice, diagnosis, or treatment. Questionnaires such as the PHQ-9 cannot diagnose depression on their own. If you are in crisis or thinking about harming yourself, call or text 988, or call 911 in an emergency.