What would be the fatwa for having a project for one of the big four audit companies Pricewater Coopers (PwC), Deloitte, Ernst and Young and KPMG? Basically, I run an IT and asset management company and we will be helping develop or maintain software and systems that help these companies or their partners do their business. As you know during audit, these companies also oversee interest based loans of companies they audit along with accounting, tax preparation, etc.
Basically I am providing these big four accounting companies with contracted employees who help them develop asset management and IT softwares. Is this haram income?