There are two types of mutual fund plans for every fund. Direct and Regular plans. Everything is same between the two : Fund structure, objective, manager, investments. Just one big difference, Regular Plans pay commission to brokers, Banks,agents and distributors. Direct plans don't. This commissions are considered as regular fund expenses which hence are higher than Direct plans. So When NAV is calculated, expenses are taken into account. Hence Direct plan NAVs are always higher than Regular plan NAVs hence it's returns are higher too.
So how much are you losing out? Say you save Rs.10000 via a bank or a distributor in Regular Plan. The Distrubutor gets an upfront commission of anywhere between 0.5-1.5% commission. And they get a trail commission of 0.5-0.7% every year too till that 10000 remains invested and on what ever that amount grows too. So if next year your investments have grown to Rs.15000 they will get 0.7% of 15000 without having done any work!
With Piggy you pay a one time flat fee of Rs.30 per transaction and that's it. You're done. We don't take any commissions from fund houses and those returns all come back to you!