In 2001 we opted for ISO9001 accreditation for our business. A very helpful chap from a respected auditing firm helped us set-up our quality manual and procedures. Once a year someone from said firm would show up for a scheduled inspection, which I am glad to say we have always past. In 2008 we became the proud owners of the most recent ISO9001:2008 certification. The main reason for us seeking ISO9001 accreditation in the first place was to improve the way we deliver our services, and that has been successfully achieved. But also, at the time it was said that in future non-ISO9000/ISO9001 contractors would not be able to provide goods and services to ISO9000/ISO9001 accredited companies, meaning that large section of the corporate and public sector market will be closed to us. Wikipedia say the following: '...a number of studies have identified significant financial benefits for organizations certified to ISO 9001, with a 2011 survey from the British Assessment Bureau showing 44% of their certified clients had won new business'. However, over the past ten years my own experience was that ISO9000/ISO9001 have been marginalised. None of our current clients ever asked ask about it, i.e. they do not seem to be interested in whether we have it or not (in fact, many of them are not even certified themselves, though the bigger ones naturally are). Some of the tenders we bid for did ask about ISO9000/ISO9001, but none specified it as a mandatory requirement. On balance, I am somewhat appointed that we went into the expense of securing this accreditation, while the benefits somehow failed to materialise. It should have bought us a commercial advantage over our competitors who are not certified, but this does not seem to be the case. Just to clarify, I am very happy with the quality procedures we implemented, and they work well for us - it is the cost of the external auditing (required for the official certification) which does not seem to provide any return. I am now considering to stop the external auditing, and drop the ISO9001:2008 logo. We will keep applying the same quality procedures, but it seems that there is no commercial sense in paying for the official accreditation and logo. I was just wondering what others' experiences were? Is it just our line of business that is thus affected? Are you in a market where your customers prefer - or even demand - ISO9000/ISO9001 certification?