With CAMS or Karvy, there are no charges as such if you invest in direct plan mutual funds. If you do not invest in ‘Direct Plan’ funds you lose upto 40% of your total investment to broker commissions over the long run.
One limitation though: you are limited to the funds that CAMS services only. So you may not get access to the best of funds available across the mutual fund industry.
You won’t also get any advisory services if you need in selecting, tracking funds to ensure optimal portfolio growth.