Margin Interest
James Chang
About this app
- Age 10
- Updated Mar 10, 2025
- OS IOS
Editor reviews
Margin Interest is a finance utility that helps traders and long-term investors estimate, track, and optimize brokerage margin borrowing costs. Use it as a margin interest calculator, rate tracker, and planning tool for stock and ETF portfolios.
Core features
- Margin interest calculator with daily accruals, compounding options, and what-if scenarios
- Broker rate tracking by balance tier with automatic updates and custom rates
- Projections and alerts to monitor utilization, interest drag, and break-even targets
Why it stands out
- Clear, fast calculations built for real trading workflows
- Flexible inputs, multi-account support, and CSV export for reports
- Privacy-first design without requiring brokerage linking
Keywords: margin interest calculator, finance app, brokerage interest, stock trading tool, portfolio cost analyzer, utilities
Screenshots
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How to use:
- Download and open the app, then set your currency and default broker.
- Sign in or continue as a guest and open the Quick Calculator.
- Enter your margin balance, borrowing rate, and holding period, then tap Calculate to see daily and monthly interest.
- Add brokers and rate tiers or input custom rates, run what-if scenarios, and save or export the report.
- Enable alerts to get notified about rate changes or when projected costs exceed your threshold.