TSP Millionaire Timeline: How Fast Can Your TSP Reach $1 Million?
Example: Current TSP balance: 25000 $ · Your annual TSP contribution: 10000 $ · Annual government TSP match: 3000 $ · Expected annual growth rate: 7 %/yr · Target TSP balance: 1000000 $
| Years to reach target balance | 25 |
| Balance at 20 years | $666,989 |
| Balance at 30 years | $1,504,256 |
| Total contributions (yours + match) over period | $325,000 |
| Growth contribution to 30-year balance | $1,154,256 |
Worked example
Starting with $25,000 in TSP, contributing $10,000/year plus a $3,000 government match, at a 7% annual return: the account crosses $1 million in approximately 27 years. At 20 years the balance is about $561,000; at 30 years it reaches $1.49 million. Of the $1.49 million, roughly $390,000 came from actual contributions over 30 years — and $1.1 million from compounding. The government match alone (30 years × $3,000 = $90,000 nominal) grows to $283,000 of that $1.49 million.
Frequently asked questions
What is the TSP equivalent of the S&P 500?
The C Fund (Common Stock Index Investment Fund) tracks the S&P 500 and historically returns 10–11% annually over long periods (1988–2024 average). The S Fund (Small Cap Stock) tracks smaller US companies and has a higher long-term return with higher volatility. Most financial planners suggest a blend of C, S, and I Funds for long-horizon investors.
Should I contribute beyond 5% to maximize match before hitting the IRS cap?
After you capture the full 4% match (which requires a 5% contribution), additional TSP contributions still make sense since growth is tax-deferred. However, if you also have a Roth IRA option and are not maximizing it, some advisors recommend diversifying to the Roth IRA before adding TSP beyond the match.
What happens to my TSP if I leave the military before 20 years?
You keep all of your own contributions and vested match. Under BRS, government matching contributions vest after two years of service. If you leave before two years, you forfeit the match (but not your own contributions). After two years, you keep everything and can leave the money in TSP or roll it to an IRA or civilian employer plan.
Is a 7% TSP growth rate realistic long-term?
The C Fund (S&P 500 tracker) has averaged approximately 10–11% annually since TSP inception in 1988, before fees. The L Income fund averages lower. A blended 7% is a reasonable conservative long-term assumption for a mixed C/S/I allocation, accounting for market cycles. Adjust the slider to model more conservative (5%) or historical (10%) scenarios.