Calculate how an investment grows over time with compound interest and regular monthly contributions. Choose from annual, quarterly, monthly, or daily compounding to see how frequency affects returns. A year-by-year chart visualises the gap between what you invested and what compound growth adds on top.
Calculate your 2025 federal income tax by bracket. Enter gross income and filing status to see your taxable income, tax owed in each bracket, effective rate, and marginal rate. Free.
Calculate your take-home pay after federal income tax, state tax, Social Security, Medicare, 401(k), and health insurance deductions. Supports all pay frequencies. Free.
Compare the after-tax retirement value of a Roth IRA vs. a Traditional IRA based on your current and retirement tax rates, contribution amount, and years of growth. Free.
How to Calculate Your FIRE Number
The FIRE number is the portfolio size you need to retire and live off investment returns indefinitely. Here is how to calculate it and what affects it.
What Is Coast FIRE and How Do You Calculate It?
Coast FIRE means you have enough invested today that it will grow to your retirement number without another dollar of contributions. Here is how to find your coast number.
How Much Should You Have in an Emergency Fund?
The standard rule is three to six months of expenses, but the right amount depends on your income, job stability, and financial cushion.
How Investment Fees Quietly Drain Your Returns
A 1% expense ratio sounds trivial. Over 30 years, it can consume 20 percent or more of your final portfolio balance. Here is the math.
What Is the Rule of 72?
The Rule of 72 lets you estimate how long it takes to double your money with a single division. It also works in reverse, and for debt.
What Is a Required Minimum Distribution (RMD)?
RMDs are mandatory annual withdrawals from tax-deferred retirement accounts, starting at age 73. Here is how they are calculated and what happens if you miss one.
How a 529 College Savings Plan Works
A 529 plan lets your college savings grow tax-free. Here is how contributions, investment options, and withdrawals work.
