Investment Calculator
Is this investment worth it?
The most powerful force in personal finance isn't a high income or a clever strategy — it's compound interest applied consistently over time. The investment calculator makes this visible: enter what you have, what you'll add each month, and your expected return, and see what you'll have in 10, 20, or 30 years. The numbers are often surprising. $10,000 invested today with $500/month at 7% annual return becomes over $680,000 in 30 years. Your total contributions were $190,000. Compounding created the other $490,000 — money that required no work, just patience. This calculator also shows the impact of return rate assumptions. The difference between 6% and 8% over 30 years isn't proportional — it's dramatic. That's why choosing low-cost index funds over high-fee alternatives isn't a minor optimization; over a career, it's often six figures. The inflation adjustment shows what your final balance is worth in today's purchasing power — because $600,000 in 30 years is not the same as $600,000 today. The "real value" figure keeps the projection honest.
- →Starting an investment account — see what consistent contributions grow to
- →Comparing the long-term impact of different monthly contribution amounts
- →Evaluating whether a higher-return but higher-fee investment is worth it
- →Projecting retirement savings alongside your 401(k) or IRA calculator
- →Understanding how inflation erodes the real value of your future balance
- →Motivating yourself to start investing — the early-start advantage is stark
Priya is 28 and opens a brokerage account with $5,000. She commits to $400/month and expects 7% average annual returns. The calculator shows her balance at 65: $1.08M. Her total contributions: $183,000. The other $900,000 came from compounding. She runs the scenario again at age 35 to see what waiting 7 years costs: $580,000 at 65 — a $500,000 difference from not starting for 7 years. She opens the account that evening.
Results are estimates only and do not constitute financial, tax, or legal advice. Always consult a qualified professional before making financial decisions.
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