Margin Trading Funding (MTF) Interest Calculator

Margin Fund:
Interest Rate:	% Annual % Daily
Holding Duration Tenure:	days

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Margin Trading Funding (MTF) Interest Calculator

A Margin Trading Funding (MTF) interest calculator helps you estimate the daily funding cost when you buy shares or ETFs using broker funding. Enter the funded amount, annual MTF interest rate, and holding duration in days. The calculator automatically converts the annual rate into a daily rate by dividing it by 365, then shows estimated daily interest, total interest, daily charts, and a day-by-day interest table.

How this MTF interest calculator works

The calculator treats the margin fund as the amount borrowed from the broker. Interest is calculated on a daily basis as margin fund x annual rate / 365. The default example uses a Rs. 5,00,000 margin fund, 15% annual interest, and 45 days holding duration. The daily rate field is non-editable because it is automatically calculated from the annual rate.

The pie chart compares the funded amount with estimated interest cost. The outstanding fund graph shows the funded amount on each day, and the interest graph shows daily interest charged during the holding period. The daily table shows every day separately, including opening funded amount, daily interest rate, interest charged, cumulative interest, and outstanding funded amount.

MTF funding limits and eligible stocks

MTF is usually available only on selected liquid stocks and ETFs. A common structure is around 4x buying power, where you bring one part of the trade value and the broker funds the remaining amount. Limits vary by broker and by security. Some stocks or ETFs may get 3x, some may get 5x, and many small-cap shares may have MTF while micro-cap shares typically do not. Eligibility, margin requirement, and haircut can change at any time.

Daily interest debit and margin shortfall risk

MTF interest is normally charged daily on the funded amount. The debit may be adjusted from your linked trading account, ledger balance, or added funds depending on broker rules. Keep sufficient balance because unpaid interest, falling stock prices, or margin shortfall can trigger broker action. If the stock or ETF price falls, you may need to add additional funds or collateral to avoid square off.

Even if you try to manage the position carefully, a sharp price crash can still lead to forced square off. A stock can also be removed from the broker's MTF-approved list, and that can trigger square off or a demand for additional margin. Shares or ETFs bought through MTF are pledged in favour of the broker, so the broker has contractual rights to take required risk-control action.

MTF is flexible but risky

You can usually square off an MTF position anytime. You may buy today and sell the same day, sell tomorrow, or carry the position for longer, subject to broker and exchange rules. This calculator restricts the holding duration to 365 days because MTF positions cannot be carried beyond one year in this calculator's planning model. After that, you have to square off, or the broker may square off on your behalf.

MTF is a double-edged product. It can increase profit when your stock selection and timing are right because you control a larger position with less upfront capital. It can also increase losses if the position moves against you. Unlike futures and options, MTF is normally a buy-side delivery-style facility; it does not allow short selling through the MTF position. It behaves like delivery bought with borrowed money, but with broker-level risk controls that can act like a forced stop loss.

MTF interest rates at large brokers

Broker rates change, so always verify the live rate on the broker site before trading. Public broker pages checked while preparing this article show these examples: Zerodha publishes 0.04% per day on the funded amount, approximately 14.6% annually. ICICI Direct says MTF interest can go as low as 9.85% p.a. depending on brokerage plan, with higher plan/default rates also listed on its FAQ. Groww publishes 14.95% p.a., around 0.041% per day, on its MTF page. SBI Securities advertises E-Margin / MTF interest rates as low as 0.04% per day and has also promoted limited-period 0% interest offers for eligible campaigns.

How to use MTF responsibly

Use MTF only when the trade is backed by fundamental analysis, technical levels, and a clear exit plan.
Check the funded amount, daily interest, brokerage, pledge charges, and square-off charges before placing the trade.
Track margin requirement daily, especially when the stock falls or volatility increases.
Keep extra funds ready so a temporary fall does not force an avoidable square off.
Do not assume all stocks have the same leverage, eligibility, or holding rules.

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Sources

This MTF calculator is for planning and education only. Actual interest, leverage, eligible securities, pledge process, square-off rules, brokerage, taxes, exchange rules, and funding limits can vary by broker and can change without notice. Confirm all terms with your broker before using MTF.

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