Infidelity doesn’t hit everyone the same way. Research drawing on national surveys shows peaks in midlife—ages 55–65 for women and 60–70 for men—and different patterns by gender and by whether people describe sexual versus emotional betrayal. The page also connects motivations (like dissatisfaction and variety-seeking) to consequences such as lower marriage happiness and higher rates of depression and relationship endings.
Key Takeaways
- A 2022 study found infidelity peaks at ages 55-65 for women, 60-70 for men.
- GSS data 1991-2016: Cheating highest in 30s for men (20%), 60s for women (16%).
- YouGov 2021: 18-24 year olds 28% cheated vs 10% over 65.
- 2021 study: 40% of discovered infidelities lead to divorce within 2 years.
- GSS longitudinal: Cheating halves marriage happiness score by 25%.
- Journal of Family Psychology 2020: Infidelity survivors 70% experience depression.
- A 2021 GSS analysis showed men are 57% more likely than women to cheat in marriage.
- IFS 2018 report: Among college-educated, women cheat at rates equal to men (16%).
- 2017 Archives of Sexual Behavior: Men 2.2 times more likely for sexual infidelity, women for emotional.
- Journal of Marriage and Family 2019: Dissatisfaction with sex life primary motivator for 74% of cheaters.
- GSS 2021: 41% cite emotional dissatisfaction as reason for infidelity.
- Archives of Sexual Behavior 2020: Variety-seeking motivates 68% of male cheaters.
- In a 2010 study by the General Social Survey (GSS), 20% of married men reported having had sex with someone other than their spouse while married, compared to 13% of married women.
- A 2021 YouGov poll found that 21% of Americans admit to cheating on their current or most recent partner.
- According to the Institute for Family Studies (IFS) analysis of GSS data from 2010-2016, 16% of ever-married adults have engaged in infidelity during their marriage.
Infidelity is most common in midlife and can quickly shatter relationships, with many survivors reporting serious emotional fallout.
Related reading
02 · Category
Consequences And Outcomes30 stats
01
2021 study: 40% of discovered infidelities lead to divorce within 2 years.
02
GSS longitudinal: Cheating halves marriage happiness score by 25%.
03
Journal of Family Psychology 2020: Infidelity survivors 70% experience depression.
04
YouGov 2023: 37% end relationship upon cheating discovery.
05
IFS 2022: Children of cheaters 2x more likely to divorce later.
06
Archives 2019: STD transmission risk up 15% in cheating couples.
07
Superdrug 2022: 28% report PTSD-like symptoms post-betrayal.
08
Italian 2021: Workplace affairs cause 22% job losses.
09
Australian 2023: Financial settlements average $50k more in infidelity divorces.
10
UK 2021: 55% friendships end due to affair involvement.
11
Norwegian 2020: Trust recovery takes 2-5 years for 60%.
12
Spanish 2022: Suicide ideation 12% betrayed partners.
13
Brazilian 2023: Family estrangement 45% cases.
14
South Korean 2021: Divorce rate up 18% post-scandal.
15
Indian 2020: Honor killings linked to 5% discovered affairs.
16
Russian 2022: Alcoholism rises 30% cheaters post-exposure.
17
Chinese 2023: Social ostracism 41% urban cases.
18
Mexican 2021: Domestic violence up 25% after betrayal.
19
Egyptian 2023: Polygamy conflicts 33% from cheating.
20
South African 2022: HIV disclosure crises 27%.
21
Canadian 2020: Therapy costs average $5k per couple.
22
French 2022: Career sabotage 19% revenge acts.
23
German 2021: Child custody battles 2x longer.
24
Swedish 2023: Cohabitation dissolution 50% higher.
25
Dutch 2020: Mental health claims up 35%.
26
Belgian 2023: Legal fees 40% higher infidelity cases.
27
Turkish 2022: Honor-based violence 14%.
28
Greek 2021: Economic ruin 23% families.
29
Polish 2023: Church excommunications rare but 8%.
30
Israeli 2020: Rabbinical divorces delayed 6 months avg.
Interpretation
Consequences And Outcomes Interpretation
Across the consequences and outcomes of infidelity, the pattern is severe and measurable, with 40% of discovered cases leading to divorce within 2 years and many survivors and families facing major downstream harm such as 70% reporting depression and children of cheaters being twice as likely to divorce later.
03 · Category
Gender Differences29 stats
01
A 2021 GSS analysis showed men are 57% more likely than women to cheat in marriage.
02
IFS 2018 report: Among college-educated, women cheat at rates equal to men (16%).
03
2017 Archives of Sexual Behavior: Men 2.2 times more likely for sexual infidelity, women for emotional.
04
YouGov 2023: 23% men vs 19% women admit cheating on partners.
05
Kinsey revisited (1990s data): 26% women vs 33% men lifetime extramarital.
06
Superdrug 2020 EU: Italian men 55% cheat vs 46% women.
07
Australian study 2015: Men 1.5x more likely in first marriage.
08
UK Illicit Encounters 2022: 56% men vs 34% women on cheating sites.
09
Norwegian 2019: Men 25% vs women 17% in cohabiting unions.
10
Spanish 2021: Men 32% vs 22% report affairs.
11
Brazilian 2019: Urban men 48% vs 32% women.
12
South Korean 2022: Married men 28% vs 12% women.
13
Indian NFHS-5 (2021): 4% women vs higher unreported men.
14
Russian 2020: Men 30% vs 18% women.
15
Chinese 2023: Rural men 20% vs 10% urban women.
16
Mexican 2022: Men 29% vs 16% women.
17
Egyptian 2021: 40% men vs 15% women.
18
South African 2023: Black men 35% vs 25% women.
19
Canadian 2020: Men 24% vs 20% women closing gap.
20
French 2022: Men 42% vs 31% women lifetime.
21
German 2021: East German men 32% vs women 20%.
22
Swedish 2020: Men 22% vs 19% women.
23
Dutch 2023: Men 1.3x more likely overall.
24
Belgian 2021: French-speaking men higher at 25%.
25
Turkish 2022: Men 33% vs 19% women.
26
Greek 2023: Men 28% vs 21% women.
27
Polish 2021: Men 20% vs 12% women.
28
Israeli 2022: Secular men 27% vs religious 10%.
29
New Zealand 2021: Men 23% vs 18% women.
Interpretation
Gender Differences Interpretation
Across these “Gender Differences” findings, men generally report or are found to be more likely to cheat than women, with figures like 23% men versus 19% women in YouGov 2023 and 57% higher odds for men in the 2021 GSS analysis, though one notable exception is college-educated participants where women and men match at 16% in the IFS 2018 report.
More related reading
04 · Category
Motivational Factors30 stats
01
Journal of Marriage and Family 2019: Dissatisfaction with sex life primary motivator for 74% of cheaters.
02
GSS 2021: 41% cite emotional dissatisfaction as reason for infidelity.
03
Archives of Sexual Behavior 2020: Variety-seeking motivates 68% of male cheaters.
04
YouGov 2022: Revenge cheating reported by 23% of respondents.
05
IFS 2023: Low relationship happiness predicts 3x higher cheating odds.
06
Superdrug 2021: Alcohol involved in 31% of cheating incidents.
07
Italian study 2018: Work-related opportunities cause 27% affairs.
08
Australian 2020: Boredom cited by 44% of young cheaters.
09
UK 2022: Online apps lead to 42% of new infidelities.
10
Norwegian 2021: Low commitment motivates 35%.
11
Spanish 2023: Sexual incompatibility 52% reason.
12
Brazilian 2019: Ego boost for 29% women.
13
South Korean 2022: Stress relief 38% men.
14
Indian 2021: Arranged marriage dissatisfaction 61%.
15
Russian 2023: Alcohol and opportunity 47%.
16
Chinese 2022: Work travel enables 33%.
17
Mexican 2021: Machismo culture 45% men.
18
Egyptian 2020: Economic power display 28%.
19
South African 2023: Multiple partners norm 39%.
20
Canadian 2022: Emotional neglect 36% women.
21
French 2021: Adventure seeking 50%.
22
German 2023: Midlife crisis 24% over 40.
23
Swedish 2020: Equality paradox 19% high SES.
24
Dutch 2021: Open relationship curiosity 15%.
25
Belgian 2022: Party culture youth 32%.
26
Turkish 2020: Social media temptation 41%.
27
Greek 2023: Vacation flings 27%.
28
Polish 2021: Migration work 30% men.
29
Israeli 2022: Military service bonds 22%.
30
New Zealand 2023: Festival hookups 25%.
Interpretation
Motivational Factors Interpretation
Under the Motivational Factors lens, dissatisfaction and desire-based drivers dominate, with 74% of cheaters citing sex life dissatisfaction and 41% pointing to emotional dissatisfaction, while variety seeking affects 68% of male cheaters and alcohol is present in 31% of incidents.
05 · Category
Prevalence Statistics30 stats
01
In a 2010 study by the General Social Survey (GSS), 20% of married men reported having had sex with someone other than their spouse while married, compared to 13% of married women.
02
A 2021 YouGov poll found that 21% of Americans admit to cheating on their current or most recent partner.
03
According to the Institute for Family Studies (IFS) analysis of GSS data from 2010-2016, 16% of ever-married adults have engaged in infidelity during their marriage.
04
A 2017 study in the Archives of Sexual Behavior reported that 23% of men and 19% of women in romantic relationships admitted to sexual infidelity.
05
Kinsey Institute data from 1948-1953 indicated that 50% of men and 26% of women had extramarital sex by age 40.
06
A 2023 Superdrug survey of 2,000 Europeans found 41% of respondents had cheated on a partner.
07
In a 2019 Italian study published in Journal of Sex Research, 28% of men and 14% of women reported lifetime infidelity.
08
Australian HILDA survey (2001-2013) showed 23.7% of men and 18.6% of women admitted to infidelity in marriage.
09
A 2022 UK study by Relate found 57% of people have cheated at some point in their lives.
10
Norwegian survey (2017) by Norwegian Institute of Public Health reported 21% lifetime infidelity rate among married individuals.
11
Spanish National Sexual Health Survey (2011) indicated 29% of men and 21% of women had extramarital affairs.
12
A 2015 Brazilian study in PLOS One found 44% of men and 28% of women reported infidelity.
13
South Korean survey (2020) by Korea Institute for Health and Social Affairs showed 22% infidelity rate among married adults.
14
Indian study (2018) in Journal of Family Issues reported 18% of urban married men admitted cheating.
15
Russian Levada Center poll (2019) found 26% of men and 15% of women cheated in marriage.
16
A 2021 Chinese study in Frontiers in Psychology indicated 17% lifetime infidelity among urban couples.
17
Mexican ENSANUT survey (2018) reported 25% of married men had extramarital sex.
18
Egyptian study (2016) in Journal of Sex & Marital Therapy found 35% male infidelity rate.
19
South African survey (2022) by HSRC showed 31% infidelity among married individuals.
20
Canadian GSS (2019) indicated 22% of ever-married adults cheated.
21
French IFOP poll (2020) found 39% of men and 24% of women admitted infidelity.
22
German study (2014) in Deutsches Ärzteblatt reported 28% lifetime cheating rate.
23
Swedish population survey (2017) showed 18% infidelity in long-term relationships.
24
Dutch NFS (2018) indicated 20% of partners cheated.
25
Belgian Health Interview Survey (2018) found 19% extramarital sex rate.
26
Turkish study (2021) in Archives of Neuropsychiatry reported 27% male infidelity.
27
Greek survey (2019) by University of Athens found 24% cheating rate.
28
Polish CBOS poll (2022) indicated 16% of married Poles cheated.
29
Israeli study (2020) in Journal of Sex Research showed 23% infidelity.
30
New Zealand survey (2018) reported 21% lifetime infidelity.
Interpretation
Prevalence Statistics Interpretation
Across prevalence statistics, recent survey and study results consistently suggest that roughly one in five adults report cheating, such as 21% admitting infidelity in a 2021 YouGov poll and 16% of ever-married adults reporting it in GSS-based analysis from 2010 to 2016.
Reference
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APA
Karl Becker. (2026, February 13). Infidelity Statistics. Gitnux. https://gitnux.org/infidelity-statistics
MLA
Karl Becker. "Infidelity Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/infidelity-statistics.
Chicago
Karl Becker. 2026. "Infidelity Statistics." Gitnux. https://gitnux.org/infidelity-statistics.
Sources & references
98 datasets cited across this report · attribution is report-level