Saving & growth calculator
See what a head start can become.
Compare two starting ages and see how extra years of contributions and compounding can shape the balance at age 65.
The head start
Starting at 25 produces $351,211 more by age 65 in this illustration.
Time lets more contributions earn returns—and lets those returns earn returns of their own.
At age 65
Compare the outcomes
- Start at age 25
- $656,203$120,000 contributed from age 25 to 65; $536,203 is modeled growth.
- Start at age 35
- $304,993$90,000 contributed from age 35 to 65; $214,993 is modeled growth.
- Difference at age 65
- $351,211The gap between the two modeled ending balances.
Time at work
Balance by age
At age 65, the age-25 scenario reaches $656,203 and the age-35 scenario reaches $304,993, assuming a steady 7% annual return.
View annual projection data
| Age | Start at 25 | Start at 35 |
|---|---|---|
| 25 | $0 | $0 |
| 26 | $3,098 | $0 |
| 27 | $6,420 | $0 |
| 28 | $9,983 | $0 |
| 29 | $13,802 | $0 |
| 30 | $17,898 | $0 |
| 31 | $22,290 | $0 |
| 32 | $27,000 | $0 |
| 33 | $32,050 | $0 |
| 34 | $37,465 | $0 |
| 35 | $43,271 | $0 |
| 36 | $49,497 | $3,098 |
| 37 | $56,174 | $6,420 |
| 38 | $63,333 | $9,983 |
| 39 | $71,009 | $13,802 |
| 40 | $79,241 | $17,898 |
| 41 | $88,067 | $22,290 |
| 42 | $97,532 | $27,000 |
| 43 | $107,680 | $32,050 |
| 44 | $118,563 | $37,465 |
| 45 | $130,232 | $43,271 |
| 46 | $142,744 | $49,497 |
| 47 | $156,161 | $56,174 |
| 48 | $170,548 | $63,333 |
| 49 | $185,976 | $71,009 |
| 50 | $202,518 | $79,241 |
| 51 | $220,256 | $88,067 |
| 52 | $239,277 | $97,532 |
| 53 | $259,672 | $107,680 |
| 54 | $281,542 | $118,563 |
| 55 | $304,993 | $130,232 |
| 56 | $330,139 | $142,744 |
| 57 | $357,103 | $156,161 |
| 58 | $386,016 | $170,548 |
| 59 | $417,019 | $185,976 |
| 60 | $450,264 | $202,518 |
| 61 | $485,911 | $220,256 |
| 62 | $524,136 | $239,277 |
| 63 | $565,124 | $259,672 |
| 64 | $609,075 | $281,542 |
| 65 | $656,203 | $304,993 |
How this was calculated
Both scenarios begin with $0. Contributions are added at the end of each compounding period. When contributions stop before age 65, the existing balance continues to compound with no new money added. Growth always stops at age 65.
- Expected annual return
- 7%
- Compounding
- Monthly
- Lower comparison
- 5%
- Higher comparison
- 9%
- Age-25 range at age 65
- $381,505–$1,170,330
- Age-35 range at age 65
- $208,065–$457,686
This uses a steady return for teaching purposes. Taxes, fees, inflation, and changing market returns are not included.