Early treatment of genital Chlamydia trachomatis can reduce complications and transmission. Guidelines have proposed standards for how soon people should be treated following a test. Data from an audit of Scottish genitourinary (GU) medicine clinics was analysed to identify factors associated with a short interval to treatment of chlamydia. A sample of 538 cases of chlamydia diagnosed at 12 Scottish GU medicine clinics between 1 April 2005 and 30 June 2005 was studied. Variables assessed included: age, sex, sexuality, whether a contact, symptoms, whether microscopy was performed, time to lab result and how the result was given. Earlier treatment was associated with: being a contact, having symptoms, being male, performing microscopy (male patients only) and giving the result at a follow-up appointment. Most of these variables (sex, symptoms, etc.) are without the influence of clinic policies and the ones which can be influenced (microscopy and follow-up appointments) are becoming less common. Time to treatment of genital chlamydia might therefore increase in the future.