The amount of time it takes to gain successful registration will vary with each organisation as no two businesses are the same.
A recent survey suggested that most businesses take between 3-18 months to prepare for ISO 9001 certification.
The cost to the businesses ranged from about $5,000 for a small well organised company to $50,000 for a multi-sited organization, starting from scratch, this is total cost for training, consultant, in-house man-hours, and registration body fees.
Often employing a consultant can save significant amounts of money and man-hours as the consultant will have had previous experience of introducing ISO 9001 registration and will be able to give you practical advise,know exactly what to do and when.
Before a registration body agrees to assess your organisation for ISO 9001 compliance it will usually require a minimum of 60-90 days of records as evidence that the systems are established and working before they perform their assessment. If you are successful in the registration of your organisation it usually takes about 6 weeks for the registration body to process the documentation and issue the certificate.