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Background: Since oral health issues can have a negative influence on a person's physical functioning, social status, and wellbeing, oral health‐related quality of life (OHRQoL) becomes an indispensable part of overall health. Previous published studies report that periodontitis (PD) and psoriatic arthritis (PsA) have a significant negative impact on OHRQoL. Based on these findings, it would be reasonable to assume that patients with coexisting PsA and PD would see a comparable or maybe synergistic effect on their OHRQoL. Hence, the aim of the present study is to evaluate the OHRQoL and its impact among subjects with concurrent PsA and PD. Material and Methods: The present study was a comparative, cross‐sectional investigation. A total of 200 participants were categorized into four groups‐ PD‐PsA (n = 50), PsA (n = 50), PD (n = 50), and healthy controls (n = 50). Demographic data and periodontal parameters—plaque index, sites with gingival bleeding, probing pocket depth, gingival recession, and clinical attachment level were recorded for all the four groups. Number of mobile teeth due to periodontitis was recorded for the PSA‐PD and PD groups. OHIP‐14 questionnaire was administered to all the four groups. Collected data was then subjected to statistical analysis. Results: The severity of OHIP‐14 summary scores was highest in the PsA‐PD group (18.06 ± 11.22) followed by the PD group (17.02 ± 9.99) and lowest in the healthy group (6.32 ± 5.59) (p <.0001). The scores of all the domains‐ oral pain, oral function, orofacial appearance and psychological impact were highest among the PsA‐PD group followed by the PD group (p <.0001). The combined interaction of PsA and PD on the OHRQoL was statistically significant (F = 6.33, p =.012). Results of the multiple linear regression analysis indicated that there was a moderate collective significant effect between age, past dental visit, frequency of daily tooth brushing, use of other oral hygiene aids, and OHIP‐14 (F(3,196) = 13.08, p <.001, R2 = 0.17, adjusted R2 = 0.15). Conclusion: The negative impact on OHRQoL was highest in the patients with concurrent presence of PD with PsA followed by those with PD alone. While the summary scores and dimensional scores of OHIP‐14 were insignificant when patients with PsA‐PD and PD alone were compared, these scores were significantly higher in patients with PsA‐PD than patients with PsA alone. [ABSTRACT FROM AUTHOR]