For informational purposes only. Not financial, investment, or tax advice. Results are estimates based on the inputs provided. Consult a qualified financial professional before making financial decisions.
Calculator tool
How this calculator works
Use the explanation to understand the formula, assumptions, and practical limits behind the calculator result.
What This Calculator Projects
This calculator estimates how a current retirement balance and steady monthly contributions may grow under one fixed annual return assumption. It is a future-value projection, not a retirement-income or withdrawal plan.
Formula Logic
The tool compounds the starting balance and then adds the future value of monthly contributions. The result panel separates:
- Total contributions - current savings plus all future deposits
- Projected growth - the amount produced by the return assumption
- Projected retirement savings - contributions plus growth
Worked Example
| Item | Value |
|---|---|
| Current savings | 25,000 USD |
| Monthly contribution | 500 USD |
| Annual return | 6.00% |
| Time | 25 years |
The chart shows why time matters: early in the plan, contributions dominate; later, projected growth becomes a larger part of the ending balance.
Nominal vs Real Value
The calculator reports a nominal future balance. Inflation can reduce what that future amount buys. If you want to think in today's purchasing power, compare the projection with an inflation assumption separately or reduce the assumed return to a real-return estimate.
What This Calculator Leaves Out
- Taxes, account fees, contribution limits, and employer matching
- Changing contributions or salary growth
- Sequence of returns and market volatility
- Required withdrawals or retirement spending needs
Related Calculators
Use the Retirement Calculator when you want a withdrawal estimate, the 401k Calculator for employer-match planning, and the IRA or Roth IRA Calculator for account-specific contribution projections.
Frequently asked questions
Does this guarantee how much I will have at retirement?
No. It is a fixed-assumption projection. Actual balances depend on market returns, fees, contribution changes, taxes, withdrawals, and how consistently contributions are made.
Why is projected growth sometimes larger than contributions?
Compounding has more time to work in longer projections. As the balance grows, the same percentage return applies to a larger amount, so investment growth can eventually exceed the money you personally added.
Should I use nominal or real returns?
Use the version that matches your decision. A nominal return shows future account dollars; a real return adjusts for inflation and is better when you want to compare future purchasing power with today's spending.
When should I use the Retirement Calculator instead?
Use the Retirement Calculator when you want years-to-retirement logic and a withdrawal estimate. This calculator is narrower: it focuses on building the future balance from savings and contributions.
