The commission on a Regular plan is quoted as "just 1%". But it's 1% of your entire balance, every year, forever — and it compounds against you exactly the way returns compound for you.
Fees are deducted from the fund's NAV daily — there's no bill, no SMS, no line item. Your statement just shows slightly lower returns, indistinguishable from a slightly worse market.
1% of ₹1 lakh is ₹1,000. But by year 20 your corpus might be ₹75 lakh — and the same "1%" is now ₹75,000 every year, whether the fund performs or not.
Every Regular plan has a Direct twin: identical portfolio, identical manager, minus the distributor commission. Buy Direct plans from the AMC's own site or apps like Kuvera, Zerodha Coin, or Groww (direct-plan mode). Switching existing Regular units to Direct is possible but is a taxable redemption — check your gains first.