Cash Yield Calculator
Calculate returns on your cash investments
Calculation Results
How to Use This Tool
Enter your principal investment amount, the annual interest rate, and the time period you plan to keep the money invested. Select the compounding frequency that matches your investment product (daily for savings accounts, monthly for CDs, etc.). Input your expected tax rate to see after-tax returns.
Formula and Logic
This calculator uses the compound interest formula: A = P(1 + r/n)^(nt), where A is the final amount, P is principal, r is the annual interest rate (decimal), n is compounding periods per year, and t is time in years. The effective annual rate accounts for compounding effects, showing the true annual return.
Practical Notes
- Higher compounding frequency increases your effective yield, even with the same nominal rate.
- Tax implications vary by account type: taxable accounts are affected by ordinary income tax, while tax-advantaged accounts may defer or eliminate taxes.
- Interest rates on cash investments fluctuate with market conditions and Federal Reserve policy changes.
- For budgeting purposes, use conservative rate estimates to avoid overestimating future savings.
- Daily compounding is common in high-yield savings accounts, while CDs typically compound monthly or quarterly.
Why This Tool Is Useful
This calculator helps you make informed decisions about where to park your emergency fund, short-term savings, or idle cash. By comparing different banking products and their compounding frequencies, you can maximize your passive income from cash holdings.
Frequently Asked Questions
Does daily compounding make a big difference?
Daily compounding can increase your effective yield by 0.1-0.3% annually compared to annual compounding, depending on the interest rate. Over long periods, this difference compounds significantly.
How do I find my tax rate for this calculation?
Your tax rate depends on your income bracket and location. For most people, the marginal tax rate applies to interest income. Consult a tax professional for personalized advice.
Should I include inflation in my calculations?
Inflation reduces purchasing power over time. For long-term planning, consider using real rates of return (nominal rate minus inflation) to understand actual growth in buying power.
Additional Guidance
Consider laddering CDs or keeping portions in both savings and CDs to balance liquidity with yield. Review FDIC insurance limits ($250,000 per depositor per institution) when allocating large cash balances. Regular monitoring of rate changes can help you move money to higher-yielding options as they become available.