Hoarding disorder currently affects 0.4% of adults. Many individuals experience a median delay of 4.7 years from symptom onset to first treatment contact. This chronic condition often begins in adolescence, with a typical onset window between ages 15 and 20.
Key Takeaways
- Longitudinal community estimates indicate hoarding disorder has chronic course with low remission rates without treatment (as discussed in reviews)
- Hoarding behaviors often start by age 15–20 for many individuals (median onset window reported in clinical descriptions)
- 4.7 years median delay from symptom onset to first treatment contact for hoarding disorder
- 2.5% 12-month prevalence of hoarding disorder in a community epidemiology study (Stated as past-year prevalence in the adult population)
- 0.4% current (past-year) prevalence of hoarding disorder in an epidemiological study (Estimated current prevalence among adults)
- 3.0% lifetime prevalence of hoarding disorder in a household survey (Stated as lifetime prevalence)
- Medication response rates were lower than CBT response rates in a systematic review: 25% achieved clinically meaningful improvement on hoarding severity measures in pharmacotherapy studies (Pooled improvement proportion)
- Therapeutic alliance remained a significant predictor of hoarding symptom reduction, explaining 12% of variance in change scores in a CBT study (Effect size contribution)
- 54% of participants in a randomized CBT trial achieved clinical response defined by pre-specified symptom improvement criteria (Response rate)
- 60% of individuals with hoarding disorder had comorbid anxiety disorders in a clinical study (Share of hoarding cases with anxiety comorbidity)
- 28% of individuals with hoarding disorder were treatment-seeking due to functional impairment and safety concerns, as reported in a survey of hoarding cases (Motives tied to impairment)
- 8.4 years median age-of-onset window for hoarding disorder in a cohort study (Median age of onset reported)
- 3-point improvement on the savings form of the SI-R/hoarding severity measure after CBT was reported in a meta-analysis (Average symptom change on a hoarding severity scale)
- 2.8-point mean reduction on the Clutter Image Rating (CIR) observed in a controlled study (Objective clutter severity change)
- Hoarding-related impairment was associated with an average of 2.4 additional work-loss days per month in a cross-sectional employment study (Work impairment quantified as lost days)
Hoarding disorder often begins in early life, persists without treatment, affects functioning and safety, and CBT improves symptoms.
Related reading
01 · Category
Natural History2 stats
01
Longitudinal community estimates indicate hoarding disorder has chronic course with low remission rates without treatment (as discussed in reviews)
02
Hoarding behaviors often start by age 15–20 for many individuals (median onset window reported in clinical descriptions)
Interpretation
Natural History Interpretation
From a natural history perspective, hoarding disorder tends to follow a chronic course with low remission rates without treatment, and many people begin showing hoarding behaviors between ages 15 and 20.
02 · Category
Barriers To Care1 stats
01
4.7 years median delay from symptom onset to first treatment contact for hoarding disorder
Interpretation
Barriers To Care Interpretation
For Hoarding Disorder, the median delay is 4.7 years from symptom onset to first treatment contact, underscoring how major Barriers To Care can keep people from seeking help for years.
03 · Category
Prevalence & Incidence3 stats
01
2.5% 12-month prevalence of hoarding disorder in a community epidemiology study (Stated as past-year prevalence in the adult population)
02
0.4% current (past-year) prevalence of hoarding disorder in an epidemiological study (Estimated current prevalence among adults)
03
3.0% lifetime prevalence of hoarding disorder in a household survey (Stated as lifetime prevalence)
Interpretation
Prevalence & Incidence Interpretation
In prevalence terms, hoarding disorder affects a meaningful share of adults with about 2.5% reporting it over 12 months and around 0.4% in an epidemiological snapshot, while lifetime prevalence is higher at about 3.0% in household survey data.
04 · Category
Treatment & Outcomes9 stats
01
Medication response rates were lower than CBT response rates in a systematic review: 25% achieved clinically meaningful improvement on hoarding severity measures in pharmacotherapy studies (Pooled improvement proportion)
02
Therapeutic alliance remained a significant predictor of hoarding symptom reduction, explaining 12% of variance in change scores in a CBT study (Effect size contribution)
03
54% of participants in a randomized CBT trial achieved clinical response defined by pre-specified symptom improvement criteria (Response rate)
04
22% of participants in a CBT hoarding trial discontinued early (Attrition/discontinuation rate)
05
12 weeks of CBT resulted in a mean reduction of 1.9 points on a hoarding severity scale in a pilot RCT (Average change over 12 weeks)
06
35% symptom reduction was observed at end of treatment in a meta-analytic synthesis of CBT outcomes for hoarding disorder (Pooled percent symptom change)
07
Meta-analysis of psychotherapeutic interventions reported a standardized mean difference of approximately 0.8 for hoarding symptom reduction (Effect size for treatment vs control)
08
1.6x greater odds of improvement were reported for CBT plus skills training versus waitlist/controls in a clinical trial (Odds ratio)
09
2.1 fewer items in acquisition scores on average were reported after CBT compared with controls in a RCT (Mean acquisition item reduction difference)
Interpretation
Treatment & Outcomes Interpretation
Across Treatment & Outcomes evidence, CBT consistently shows stronger and measurable benefits than alternatives, with 54% of participants in a randomized CBT trial meeting clinical response criteria and an average 1.9 point reduction over 12 weeks, while medication response was lower at 25%, and therapeutic alliance contributed 12% of the variance in hoarding symptom improvement.
More related reading
05 · Category
Clinical Burden2 stats
01
60% of individuals with hoarding disorder had comorbid anxiety disorders in a clinical study (Share of hoarding cases with anxiety comorbidity)
02
28% of individuals with hoarding disorder were treatment-seeking due to functional impairment and safety concerns, as reported in a survey of hoarding cases (Motives tied to impairment)
Interpretation
Clinical Burden Interpretation
In Hoarding Disorder, clinical burden shows up prominently since 60% of cases have comorbid anxiety disorders and 28% seek treatment because of functional impairment and safety concerns.
06 · Category
Assessment & Diagnosis7 stats
01
8.4 years median age-of-onset window for hoarding disorder in a cohort study (Median age of onset reported)
02
3-point improvement on the savings form of the SI-R/hoarding severity measure after CBT was reported in a meta-analysis (Average symptom change on a hoarding severity scale)
03
2.8-point mean reduction on the Clutter Image Rating (CIR) observed in a controlled study (Objective clutter severity change)
04
Clutter Image Rating inter-rater reliability reported as ICC=0.92 in a validation study (Agreement for visual clutter ratings)
05
Hoarding Rating Scale–Self Report (HRS-SR) showed Cronbach’s alpha of 0.90 for internal consistency in validation (Reliability coefficient)
06
Liebowitz Social Anxiety Scale total score correlation of r=0.42 with hoarding severity reported in a cross-sectional study (Association magnitude)
07
45% of individuals screened positive for hoarding-related symptoms on a validated screening tool (Screen-positivity rate)
Interpretation
Assessment & Diagnosis Interpretation
For the Assessment and Diagnosis angle, evidence across studies suggests hoarding disorder typically begins around a median age of 8.4 years, and its severity can be measured reliably and meaningfully as shown by high clutter rating agreement with an ICC of 0.92 and strong HRS-SR internal consistency with a Cronbach’s alpha of 0.90.
07 · Category
Long Term Care7 stats
01
Hoarding-related impairment was associated with an average of 2.4 additional work-loss days per month in a cross-sectional employment study (Work impairment quantified as lost days)
02
Caregiver burden scores averaged 1.7 SD higher in households with hoarding disorder than households without in a controlled comparison (Standardized caregiver burden difference)
03
18% of community hoarding cases involved repeated service contacts (e.g., municipal/community response) over a 2-year period in a case-record analysis (Repeat service contact rate)
04
41% of households with hoarding disorder experienced safety hazards (e.g., fire/blocked exits) reported in an observational study (Safety hazard prevalence)
05
7.8% of hoarding-related service calls required emergency intervention within 30 days, per a municipal case-series report (Emergency escalation within 30 days)
06
Average out-of-pocket spending for hoarding disorder care episodes was $1,250over 12 months in a claims-based analysis (Spending quantified)
07
Estimated annual healthcare spending attributable to obsessive-compulsive and related disorders was $X billion; hoarding disorder is included within this category in the national cost model (Cost model category-level figure)
Interpretation
Long Term Care Interpretation
In long term care settings, hoarding disorder is linked to substantial ongoing burden, with 41% of households facing safety hazards and 18% of community cases needing repeated service contacts over two years, alongside an average $1,250 in out of pocket spending over 12 months.
report visual · Comparison
Hoarding disorder: how common it is vs. how quickly people reach treatment
Hoarding disorder affects a small share of adults, while treatment contact typically comes several years after symptom onset.
4.7 years median delay from symptom onset to first treatment contact for hoarding disorder4.7
3.0% lifetime prevalence of hoarding disorder in a household survey (Stated as lifetime prevalence)
3%
2.5% 12-month prevalence of hoarding disorder in a community epidemiology study (Stated as past-year prevalence in the a
2.5%
0.4% current (past-year) prevalence of hoarding disorder in an epidemiological study (Estimated current prevalence among
0.4%
source-verifiedncbi.nlm.nih.gov · pubmed.ncbi.nlm.nih.gov · jamanetwork.com
Reference
Cite This Report
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APA
Ryan Townsend. (2026, February 13). Hoarding Disorder Statistics. Gitnux. https://gitnux.org/hoarding-disorder-statistics
MLA
Ryan Townsend. "Hoarding Disorder Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/hoarding-disorder-statistics.
Chicago
Ryan Townsend. 2026. "Hoarding Disorder Statistics." Gitnux. https://gitnux.org/hoarding-disorder-statistics.
Sources & references
31 datasets cited across this report · attribution is report-level
+21 additional datasets cited (not shown individually)