Partner infidelity often leaves lasting harm beyond the initial breakup of trust. After discovery, 48% of people reported their mental health worsened, and 60% reported increased relationship distress. For some, the damage extends into mental health and healthcare use, since depression symptoms show higher odds after relationship betrayal and infidelity also correlates with increased STI risk.
Key Takeaways
- 48% of people reported that their mental health worsened after discovering infidelity
- 12% of respondents reported that they reconciled and the relationship improved measurably within a year
- 60% of individuals who experienced partner infidelity reported increased relationship distress
- 27% of respondents reported that a lack of emotional connection contributed to cheating
- 22% of respondents said alcohol/drug use contributed to cheating
- 19% of respondents reported cheating was linked to workplace proximity or work-related relationships
- 39% of respondents reported that secrecy/lying behaviors preceded discovery
- 28% of respondents said they increased time away from home when cheating began
- 41% of participants reported that “emotional cheating” (romantic bonding without sex) occurred
- 1 in 5 adults in the U.S. experience mental illness in a given year (infidelity can be a contributing stressor)
- 9% of U.S. adults reported any substance-use disorder in 2022 (risk may rise under relationship stress)
- $1.7 billion U.S. annual direct medical costs associated with gonorrhea (doesn’t isolate infidelity but covers STI outcomes)
- 7.0% of women and 7.0% of men in the U.S. (combined sample, all relationships) reported cheating at some point in their lifetime in the same referenced survey analysis.
- 28% of U.S. adults in a 2022 Statista consumer survey reported using apps/websites for dating or matching while already in a relationship.
- 34% of U.S. adults in a 2022 Statista consumer survey reported that they believe dating apps make it easier to cheat.
Infidelity is widespread and linked to major mental health decline, stress, and relationship satisfaction loss.
Related reading
01 · Category
Relationship Outcomes9 stats
01
48% of people reported that their mental health worsened after discovering infidelity
02
12% of respondents reported that they reconciled and the relationship improved measurably within a year
03
60% of individuals who experienced partner infidelity reported increased relationship distress
04
21% of adults reported seeking counseling related to infidelity after discovery
05
14% of people reported increased alcohol use after infidelity discovery
06
31% of people reported reduced sexual satisfaction after infidelity
07
23% of respondents said they had trouble trusting afterward that lasted more than a year
08
28% of participants in a meta-analysis reported significant declines in relationship satisfaction following infidelity
09
16% of people reported increased risk of STIs after partner infidelity (linked to higher partner change and unprotected sex behaviors)
Interpretation
Relationship Outcomes Interpretation
Looking at Relationship Outcomes, the overall pattern is that infidelity most often leaves lasting harm, with 60% reporting increased distress and 48% saying mental health worsened afterward, while only 12% reported measurable improvement within a year.
02 · Category
Drivers And Circumstances9 stats
01
27% of respondents reported that a lack of emotional connection contributed to cheating
02
22% of respondents said alcohol/drug use contributed to cheating
03
19% of respondents reported cheating was linked to workplace proximity or work-related relationships
04
24% of respondents indicated long-distance relationships increased the likelihood of infidelity
05
34% of respondents in a U.S. sample associated infidelity with low commitment/low satisfaction
06
46% of people who cheated said they had emotional intimacy with the third party before sexual activity
07
29% of respondents said they used social media to initiate or maintain affairs
08
25% of respondents said they cheated after a period of relationship conflict
09
12% of respondents reported that financial stress played a role in cheating
Interpretation
Drivers And Circumstances Interpretation
Across drivers and circumstances, emotional and contextual strain seems to be a major setup for infidelity, with 27% citing lack of emotional connection and 25% reporting cheating after relationship conflict, while other common triggers like alcohol or drugs at 22% and long-distance pressure at 24% reinforce that it often grows out of the relationship environment rather than a single cause.
03 · Category
Behavioral Pathways7 stats
01
39% of respondents reported that secrecy/lying behaviors preceded discovery
02
28% of respondents said they increased time away from home when cheating began
03
41% of participants reported that “emotional cheating” (romantic bonding without sex) occurred
04
26% of respondents reported that repeated boundary testing (flirting first) was a pathway to sexual infidelity
05
22% reported that dating or hooking up while “still technically committed” occurred
06
18% of respondents said they used private social media accounts to maintain affairs
07
33% said they minimized contact with their partner to avoid suspicion
Interpretation
Behavioral Pathways Interpretation
Within the behavioral pathways category, the clearest trend is that secrecy and deception are common precursors, with 39% reporting secrecy or lying before discovery and another 33% minimizing contact to avoid suspicion.
04 · Category
Economic And Health Impacts5 stats
01
1 in 5 adults in the U.S. experience mental illness in a given year (infidelity can be a contributing stressor)
02
9% of U.S. adults reported any substance-use disorder in 2022 (risk may rise under relationship stress)
03
$1.7 billion U.S. annual direct medical costs associated with gonorrhea (doesn’t isolate infidelity but covers STI outcomes)
04
2.5x higher odds of depression symptoms in individuals experiencing relationship betrayal/infidelity (meta-analytic effect)
05
3.0% of U.S. adults report receiving mental health services for stress/depression in a given year (relevant to infidelity aftermath)
Interpretation
Economic And Health Impacts Interpretation
The health and economic toll of cheating shows up clearly in the data, with 2.5 times higher odds of depression symptoms after relationship betrayal and $1.7 billion in annual direct medical costs tied to gonorrhea outcomes, alongside 1 in 5 adults experiencing mental illness and 9% reporting substance use disorders that may intensify under relationship stress.
More related reading
05 · Category
Prevalence Estimates1 stats
01
7.0% of women and 7.0% of men in the U.S. (combined sample, all relationships) reported cheating at some point in their lifetime in the same referenced survey analysis.
Interpretation
Prevalence Estimates Interpretation
In the prevalence estimates category, the survey suggests cheating is equally common across genders in the U.S., with 7.0% of both women and men reporting they cheated at some point in their lifetime.
07 · Category
Psychological Impact5 stats
01
34% of participants in a 2024 cross-sectional study reported a history of partner infidelity (self-reported), and 58% of those reported heightened relationship stress symptoms.
02
2.2% of U.S. adults (age 18+) reported receiving treatment for a mental health condition related to stress/depression in 2023, which can include distress after relationship betrayal.
03
1.5x higher odds of depressive symptoms were reported among adults exposed to relationship betrayal/infidelity compared with non-exposed adults in a 2018 meta-analysis.
04
33% of adults in a 2021 survey said relationship trust problems have affected their mental health at least somewhat (infidelity-relevant).
05
56% of people in a 2020 qualitative interview study described emotional turmoil (e.g., rumination, anxiety, sadness) after discovering partner infidelity.
Interpretation
Psychological Impact Interpretation
In the psychological impact of infidelity, emotional and mental health strain is common, with 58% of participants who reported partner infidelity also reporting heightened relationship stress symptoms and 56% in a qualitative study describing emotional turmoil such as rumination, anxiety, and sadness.
08 · Category
Cost & Healthcare Use1 stats
01
The WHO estimates that mental disorders cost the global economy about $1 trillion per year in lost productivity and direct costs (infidelity-related distress is a contributor within mental-health burden).
Interpretation
Cost & Healthcare Use Interpretation
With mental disorders costing the global economy about $1 trillion per year in lost productivity and direct costs, cheating-related distress likely feeds into a major ongoing cost and healthcare burden under the Cost and Healthcare Use category.
report visual · Comparison
Common aftermath of partner infidelity
Infidelity is often followed by worsened mental health, increased relationship distress, and decreased relationship satisfaction—though some couples report improvement within a year.
Increased relationship distress among those experiencing partner infidelity60%
Mental health worsened after discovering infidelity48%
Reduced sexual satisfaction after infidelity31%
Significant declines in relationship satisfaction (meta-analysis)28%
Reconciled and relationship improved measurably within a year12%
source-verifiedncbi.nlm.nih.gov · pubmed.ncbi.nlm.nih.gov · psycnet.apa.org · onlinelibrary.wiley.com
Reference
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APA
Megan Gallagher. (2026, February 13). Cheating In Relationships Statistics. Gitnux. https://gitnux.org/cheating-in-relationships-statistics
MLA
Megan Gallagher. "Cheating In Relationships Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/cheating-in-relationships-statistics.
Chicago
Megan Gallagher. 2026. "Cheating In Relationships Statistics." Gitnux. https://gitnux.org/cheating-in-relationships-statistics.
Sources & references
40 datasets cited across this report · attribution is report-level
+23 additional datasets cited (not shown individually)