Introduction: Smoking rates among low-socioeconomic status adults remain high and little is known about the modifiable factors associated with cessation for this group. This study aimed to assess factors associated with self-reported seven-day point prevalence abstinence at 2-months and 6-months prolonged abstinence biochemically verified. Method: Secondary analysis of a two-group parallel block randomised open-label smoking cessation trial with allocation concealment. Telephone-based quit support was delivered to 1,047 Australian low-SES smokers motivated to quit and randomised to either a Financial Education and Support Program plus nicotine replacement therapy (NRT) or usual care plus NRT. Data was collected for the Financial Intervention for Smoking Cessation Among Low-income Smokers (FISCALs) trial between April 2013 and September 2014. Measurements included: sociodemographic, smoker characteristics, mental health, substance use, and recruitment source were measured at baseline. Outcomes were self-reported seven-day point-prevalence abstinence at 2-months and 6-months prolonged abstinence biochemically verified using urine or saliva cotinine. Results: Twenty nine percent (95% CI 26.8, 32.3) of the sample reported seven-day point prevalence abstinence and 3% (95% CI 2.4, 4.6) reported verified 6-month prolonged abstinence. Reduced odds of seven-day point prevalence abstinence were associated with female? gender