While the line between the two professions can be slightly fluid, there is a difference between Chartered Accountancy and Cost Accountancy.  The former focuses more on financial accounts, preparation of balance sheets, treasury, payables and receivables, funding, taxation, tax audits, direct taxes, and compliance.  On the other hand, Cost Accountancy is focused on pricing decisions, variance analysis, inventory, product costing, budgets, MIS, and ERP.