™How to use this calculator
Translate a borrowed balance, annual rate and holding period into daily and total estimated interest. Change one assumption at a time, compare the result and consider what the formula leaves out.
Risk · Core
Margin Interest Calculator
Translate a borrowed balance, annual rate and holding period into daily and total estimated interest.
ILLUSTRATIVE RESULTS
Estimated interest$98.63
Estimated daily interest$3.29
Required return on borrowed amount0.99%
What this result meansEstimate the financing cost of borrowed trading capital. It translates only the assumptions entered above and cannot determine whether investments are substantially identical or provide tax advice.
Formula and assumptions
Interest = borrowed amount × annual rate × days ÷ 365. Results are simplified illustrations and may exclude taxes, changing rates, liquidity, spreads, market impact, assignment, broker rules or other real-world factors.
Common questions
Does this calculator use live market data?
No. Every value comes from the assumptions you enter. A ticker symbol, when shown, is only a label.
Can I make a trade based on this result?
The result is an educational illustration, not a recommendation or a complete analysis. Verify current facts, account rules, costs and risks independently.
Why might the actual result be different?
Real outcomes can be affected by execution price, spread, slippage, fees, taxes, liquidity, volatility, financing costs, corporate actions and changing market conditions.
Educational illustration only. This calculator does not use live market data and does not provide investment, trading, tax or legal advice. Verify formulas, rules, fees and product details with current primary sources and regulated providers before acting.