Investment Growth Calculator
Project how an investment portfolio grows when you invest a fixed amount each month.
Portfolio value $512,214.08
Total invested $150,000.00
Investment growth $357,214.08
| Year | Start | Contributions | Growth | End |
|---|---|---|---|---|
| 1 | $5,000 | $6,000 | $640 | $11,640 |
| 2 | $11,640 | $6,000 | $1,191 | $18,831 |
| 3 | $18,831 | $6,000 | $1,788 | $26,619 |
| 4 | $26,619 | $6,000 | $2,434 | $35,053 |
| 5 | $35,053 | $6,000 | $3,134 | $44,188 |
| 6 | $44,188 | $6,000 | $3,893 | $54,080 |
| 7 | $54,080 | $6,000 | $4,714 | $64,794 |
| 8 | $64,794 | $6,000 | $5,603 | $76,397 |
| 9 | $76,397 | $6,000 | $6,566 | $88,962 |
| 10 | $88,962 | $6,000 | $7,609 | $102,571 |
| 11 | $102,571 | $6,000 | $8,738 | $117,310 |
| 12 | $117,310 | $6,000 | $9,962 | $133,271 |
| 13 | $133,271 | $6,000 | $11,286 | $150,558 |
| 14 | $150,558 | $6,000 | $12,721 | $169,279 |
| 15 | $169,279 | $6,000 | $14,275 | $189,554 |
| 16 | $189,554 | $6,000 | $15,958 | $211,512 |
| 17 | $211,512 | $6,000 | $17,780 | $235,292 |
| 18 | $235,292 | $6,000 | $19,754 | $261,046 |
| 19 | $261,046 | $6,000 | $21,892 | $288,938 |
| 20 | $288,938 | $6,000 | $24,207 | $319,144 |
| 21 | $319,144 | $6,000 | $26,714 | $351,858 |
| 22 | $351,858 | $6,000 | $29,429 | $387,287 |
| 23 | $387,287 | $6,000 | $32,370 | $425,657 |
| 24 | $425,657 | $6,000 | $35,554 | $467,211 |
| 25 | $467,211 | $6,000 | $39,003 | $512,214 |
How it's calculated
Investing a fixed amount monthly (dollar-cost averaging) buys more shares when prices are low and fewer when high. This models the balance compounding monthly at your expected return.
Assumptions
- Returns compound monthly; investments are made at month end (dollar-cost averaging).
Last updated: 2026-08-07
These assumptions follow our general methodology.
Frequently asked questions
Does this account for market volatility?
No — it uses a steady average return. For a range of outcomes based on volatility, use the Monte Carlo simulator (coming soon).
Related calculators
Compound Interest Calculator See how a starting balance plus regular contributions grows with compound interest over time. Retirement Calculator Enter your age, savings, and monthly contribution to see what your retirement balance could become, shown both in future dollars and in today’s purchasing power. Time to Reach a Savings Goal Find how long it takes to reach a target — like your first $1 million — at your current savings rate.