Compare money decisions
Lump Sum vs. Monthly Investing Calculator
Investment strategy details
Estimated strategy outcome
$0.00 difference
Under a steady 7% return assumption, investing the full amount immediately produces an estimated ending balance that is $0.00 higher in this model.
- Lump-sum ending balance
- $0.00
- Monthly-investing ending balance
- $0.00
- Estimated difference
- $0.00
- Monthly deployment period
- 12 months
- Lump-sum estimated growth
- $0.00
- Monthly-investing estimated growth
- $0.00
Estimated balance over time
For educational purposes only. This is not financial advice. Seek appropriate professional advice before making any financial decisions.
What this comparison shows
This calculator compares investing a fixed amount immediately, also called a lump sum, with spreading the same amount across monthly investments. Both options use the same total amount and example return.
Investing the full amount at once gives all the money more time in the market, where it can gain or lose value. Investing monthly spreads purchases across the year and leaves part of the money uninvested until later. It may also result in buying more shares when prices are lower and fewer when prices are higher.
The calculator uses the same assumed return each month to show how the timing of the investments changes the result. Real markets rise and fall, so actual results depend on when those changes happen. Neither approach removes market risk or guarantees a gain.
Key takeaway
Investing earlier may benefit from more time in the market. Investing monthly may benefit during a downturn because later contributions can buy more shares at lower prices. Neither approach is guaranteed to perform better.
Helpful terms
- Lump sum
- Investing all of the available money at one time.
- Monthly investing
- Spreading the same amount across regular monthly deposits.
- Downturn
- A period when investment prices are falling.
Sources: Investor.gov definition of dollar-cost averaging and Investor.gov definition of risk.