What this calculator shows you
- Flexible Projections
- Calculate with any contribution amount and frequency
- Realistic Returns
- Use historical averages or custom return rates
- Tax Considerations
- Factor in taxes on your investment gains
- Goal Planning
- Work backwards from your target to find needed contributions
Understanding Investment Returns
Investment returns come from two sources: capital appreciation (your investments increasing in value) and income (dividends, interest). Total return combines both. The S&P 500 has historically returned about 10% annually, including dividends, though individual years vary dramatically.
The Impact of Regular Contributions
Dollar-cost averaging—investing a fixed amount regularly regardless of market conditions—reduces the impact of volatility. By buying more shares when prices are low and fewer when high, you average out your cost basis over time. This strategy is especially effective for long-term investors.
Choosing the Right Expected Return
Use realistic return assumptions based on your asset allocation. Stocks historically return about 7% after inflation (about 10% before), bonds 2-4%, and cash 0-2%. A balanced portfolio might assume 6-7%. Being too optimistic can lead to under-saving; being too conservative might mean working longer than necessary.
The Role of Time in Investing
Time in the market beats timing the market. Historically, the US stock market (S&P 500, dividends reinvested) has not lost money over any 20-year period, though past results don't guarantee future ones. The longer your time horizon, the more you can afford to take calculated risks for higher expected returns. Start investing as early as possible to maximize time's compounding effect.
Questions people ask
What return should I assume for my investments?
For long-term stock investments, 7-10% before inflation is historically reasonable. After inflation, expect 5-7%. For a balanced portfolio with bonds, use 5-6%. Always consider your specific investments and time horizon.
How much should I invest each month?
Financial experts recommend saving 15-20% of income for retirement. The exact amount depends on your goals, timeline, and current savings. Our calculator helps you find the contribution needed to reach your specific goals.
Should I invest a lump sum or dollar-cost average?
Vanguard research (2012) found lump-sum investing beat dollar-cost averaging about two-thirds of the time, because markets tend to go up. However, DCA reduces regret risk and is easier psychologically. If you have money to invest, invest it; if you're investing from income, DCA naturally.
Education only, not personalized financial, tax or investment advice. Results are estimates based on the numbers you enter; real returns vary and losses happen.