The mutual fund cost stack

Saturday morning I am staring at an AMFI factsheet for an average regular-plan large-cap active equity scheme. The cover prints 1.65 percent TER like that is the whole story. The honest version sits closer to 178 bps a year. Pre-tax. Before LTCG even shows up at exit.

Here is the part nobody puts on slide one.

TER pays the AMC, the distributor commission, and the brand spend. Underneath that sits a second line. Portfolio churn. Every time the fund manager rotates the book, brokerage and STT come out of NAV before it ever lands on your statement. With industry turnover sitting around 30 percent a year, that quietly adds roughly 13 bps. Then a thin third line on top of that. Cash drag and the small gap between gross alpha and what arrives in your account.

Add the three. That is your real annual fee. The math says the brochure can be telling the truth and still leaving the second and third lines unsaid . rupeecase.com/compare .

The biggest fixable line in this stack is not the one most people argue about. It is whether you own the regular plan or the direct plan of the exact same fund. Same portfolio. Same manager. Direct strips out distributor commission and saves roughly 60 to 90 bps every single year. Open your CAS at rupeecase.com/learn/ , read the plan suffix on each scheme . that one check is worth more than most stock-picking calls you will read this week.

The question is not whether 178 bps is fair. Some funds earn it. Most do not. The question is whether you are paying it for a transparent rule book or a black box. Cost without clarity is the worst trade.

If you want to lay an MF next to a rules-based portfolio on one page, that is what rupeecase.com/compare is for. And if you have not figured out which kind of investor you actually are before picking, start at rupeecase.com/risk-profile . The strategy hub at rupeecase.com/strategies/ sits at the end of that path, not the start.

The brochure shows you 1.65 percent. The honest version is closer to 178 bps. Compound that for ten years and decide if it earned its keep.

How the expense ratio is built now

The 1.65 percent on that factsheet was printed under the old fee rules. SEBI has since rebuilt how the number is put together. At its board meeting of 17 Dec 2025 it decided that the fee cap, now called the base expense ratio, excludes every statutory levy. STT, GST, stamp duty, SEBI fees and exchange fees on the fund's trades are charged at actuals on top. The total expense ratio you see is the sum of four parts: the base expense ratio, brokerage, regulatory levies and statutory levies.

That matters for the second line of the stack. Some of the churn cost that used to hide inside NAV now has to sit inside the TER you read. The cap on the base part still falls as a scheme grows. Here is the revised ladder for open ended equity schemes.

A cap is a ceiling, not a price. A fund can charge less, and direct plans of the same scheme always charge less because they carry no distributor commission.

Rebuilding the stack on Rs 10 lakh

Here is the stack from the opening, rebuilt line by line so you can redo it on paper. The numbers are a worked example, not a named fund.

1. Expense ratio of the regular plan: 1.65 percent a year.
2. Churn. The fund turns over 30 percent of its book a year. Every rupee turned over is sold once and bought once. A delivery round trip pays STT of 0.1 percent on each side, stamp duty of 0.015 percent on the buy, NSE charges of about 0.003 percent each side and brokerage. With brokerage at 0.06 percent each side, the round trip comes to about 0.34 percent. Thirty percent of that is about 0.10 percent a year.
3. Cash drag. A fund keeps a little cash for redemptions. Say 1 percent of the book earns 5 points less than the stocks would have. That is 0.05 percent a year.

Add the three: 1.65 + 0.10 + 0.05 = 1.80 percent. That is within a few basis points of the 178 in the opening, and the exact figure moves with the fund's turnover and cash.

1. Gross returnWhat the stocks in the fund earned.
2. Expense ratioBase fee, brokerage and levies, taken daily from NAV.
3. ChurnSTT, stamp duty and charges on every rotation.
4. Cash dragMoney parked for redemptions, earning less.
5. Your NAVThe only return that reaches your statement.

Now put it in rupees. Rs 10 lakh for ten years at a 12 percent gross return grows to about Rs 31.06 lakh with no cost at all. Take away 1.80 percent a year and it ends near Rs 26.41 lakh. Move to the direct plan of the same fund, where the expense ratio is lower by the commission, and say the all in cost drops to 1.10 percent. The same money ends near Rs 28.14 lakh. That Rs 1.73 lakh gap between the two plans is the commission line alone, compounded.

The line you can read in rupees twice a year

You do not have to estimate the commission. SEBI's circular of 20 Sep 2016 made every half yearly Consolidated Account Statement, for the halves ending September and March, show two things for each scheme you hold: the average total expense ratio of your plan for the half year, and the gross commission the fund paid your distributor against your money, in rupees. A direct plan shows no commission line, because it pays none.

That is the check from the opening, done properly. Open the last half yearly CAS, find each scheme, and read the rupee figure. Direct plans themselves have existed since 1 Jan 2013, under SEBI's circular of 13 Sep 2012, with a separate NAV and a lower expense ratio because no commission is paid from them.

None of this says an expense ratio is too high. Some funds earn their fee after costs. The point is to know the full number before you judge it. The free Learn module on mutual fund structure and hidden costs goes through plans, categories and costs with a quiz, and the expense ratio calculator runs your own fund. The companion post on the true cost stack of a regular plan follows one statement line by line.