Borderline personality disorder (BPD) has one of the highest suicide completion rates of any psychiatric diagnosis, with roughly 10% of people with the condition ultimately dying by suicide. But the answer depends on how you measure it. When researchers look at annual suicide rates per 100,000 people living with a diagnosis, major depression tops the list. And anorexia nervosa, bipolar disorder, and schizophrenia all carry dramatically elevated risk compared to the general population.
The short version: several mental illnesses cluster near the top, and the “highest” changes depending on whether you’re counting lifetime completions, annual rates, or how much higher the risk is compared to people without a diagnosis. Here’s what the data actually shows for each.
Borderline Personality Disorder
About 70% of people with BPD will attempt suicide at least once in their lifetime, and approximately 10% will die by suicide. That completion rate is often cited as the highest of any single psychiatric disorder. The gap between attempts and completions is notable here: BPD involves intense emotional crises that can trigger frequent, impulsive attempts, many of which are survived. But the sheer volume of attempts means a significant number are fatal over a lifetime.
BPD is sometimes underdiagnosed or misdiagnosed as depression or bipolar disorder, which can delay effective treatment. Dialectical behavior therapy (DBT) was originally developed specifically for people with BPD and remains the intervention with the strongest evidence base for reducing suicidal behavior, particularly among younger patients.
Major Depression
When measured as an annual rate, major depression carries the highest suicide rate of any serious mental illness: roughly 534 per 100,000 person-years, based on a systematic review and meta-analysis published in Psychological Medicine. For comparison, the general population suicide rate in the United States is about 14 per 100,000. That means people with major depression die by suicide at a rate roughly 38 times higher than average in any given year.
The wide confidence interval in that estimate (ranging from about 30 to 1,449 per 100,000) reflects how much the rate varies depending on the severity of depression, whether someone is hospitalized, and what other conditions are present. Still, even the low end of that range is double the general population rate, and the central estimate is striking. Depression’s risk comes partly from its prevalence. It’s far more common than schizophrenia or BPD, so even a smaller percentage translates into a large absolute number of deaths.
Schizophrenia
Nearly 5% of people with schizophrenia die by suicide, and between 25% and 50% attempt it at least once. The pooled annual rate is about 352 per 100,000 person-years, placing it between depression and bipolar disorder in annual risk.
Timing matters enormously with schizophrenia. The highest-risk window is the first ten years after illness onset, with many suicides concentrated in the first two years. Discharge from psychiatric hospitalization is another dangerous period. One study found a suicide rate of 178 per 100,000 within the first three months after leaving inpatient care. Another analysis of nearly 2,900 patients found that about 32% of suicides occurred within six months of hospitalization, rising to 48% within the first year.
Young men in the early phase of illness, particularly those who retain enough insight to understand their diagnosis and its implications, face the steepest risk. Hopelessness about the future, rather than active psychotic symptoms, is often the driver.
Bipolar Disorder
Between 4% and 19% of people with bipolar disorder die by suicide, and 20% to 60% attempt it at least once. The wide ranges reflect differences in study populations and how strictly bipolar subtypes are defined. The annual rate is around 237 per 100,000 person-years, and the standardized mortality ratio for suicide is 10 to 30 times higher than the general population.
Mixed episodes, where depressive and manic symptoms overlap, are considered particularly dangerous because they combine the despair of depression with the impulsivity and energy of mania. Depressive phases carry more risk than purely manic ones. Lithium, one of the oldest psychiatric medications still in regular use, has consistently shown a specific protective effect against suicide in bipolar disorder beyond its mood-stabilizing benefits.
Why Substance Use Disorder Compounds the Risk
Substance use disorders don’t typically top the rankings on their own, but they act as a powerful accelerant when combined with other diagnoses. A large study of nearly 3 million veterans found that having two or more mental health conditions increases suicide risk, though usually in a pattern researchers call “subadditive.” That means the combined risk is higher than either condition alone, but lower than you’d get by simply adding the two individual risks together. Your brain’s vulnerability doesn’t stack in a perfectly mathematical way.
The one exception: substance use disorder combined with an anxiety disorder showed truly additive risk, meaning the combined hazard (about 4.8 times the baseline) roughly equaled the sum of each disorder’s individual risk. Substance use disorder paired with depression also showed additive effects during the first year of follow-up. Alcohol and drug use lower inhibitions, worsen depressive episodes, and increase impulsivity, all of which make a suicidal crisis more likely to become fatal.
What Reduces Risk Across Diagnoses
Three therapeutic approaches have the strongest research support for reducing suicidal behavior across mental health conditions. Brief cognitive behavioral therapy (BCBT) reduced suicide attempts by 60% in a randomized trial of soldiers with suicidal ideation or recent attempts. DBT, originally designed for BPD, is the only intervention rated as having strong evidence for reducing suicidal behavior in young people. A third approach called Collaborative Assessment and Management of Suicidality (CAMS) has been shown across nine trials to significantly reduce suicidal ideation, hopelessness, and overall distress compared to standard care.
Safety planning, a structured set of written steps a person follows during moments of intense distress, is one of the simplest tools and has demonstrated real reductions in attempts and deaths. It typically involves identifying personal warning signs, listing coping strategies and people to contact, and removing access to lethal means. Two specific safety planning protocols have been validated in research: the Crisis Response Plan and the Safety Planning Intervention.
The overarching pattern across all high-risk diagnoses is that the period immediately following a crisis, whether that’s a hospitalization, a first psychotic episode, or a severe depressive episode, carries disproportionate danger. Most effective interventions focus on that window, building skills and support structures before the next crisis hits rather than reacting after the fact.