Decision context
Stress-test the assumptions behind a long-term projection
Retirement estimates can seem authoritative because the horizon is long. Their usefulness comes from showing which assumptions drive the gap, not from predicting a specific outcome.
Treat the income-gap output as a prompt to test savings, timing, inflation, and retirement-income assumptions rather than a statement of future security.
Return timing matters
A constant-rate projection cannot show the effect of gains and losses arriving in a different order around retirement.
Income needs have several layers
Housing, health care, taxes, benefits, family support, and inflation are not inferred from the desired-income field.
Illustrative scenario
A worker keeps the same contribution but moves the retirement age two years later. The changed result reflects both additional contributions and two more years of assumed growth, which should be discussed separately.
What this calculator does
The tool projects a balance to a target retirement age, can increase contributions annually, translates a current-dollar income target using the entered inflation rate, and compares that target with an illustrative withdrawal percentage. The yearly table exposes the contribution and growth assumptions.
When to use it
Use it when setting a contribution target, discussing the effect of retiring earlier, or testing how a lower return changes a long-term savings picture. It is best used with several conservative scenarios.
Inputs explained
- Current age: your age at the start of the retirement projection.
- Retirement age: the age when the projection stops accumulating contributions.
- Current savings: the existing balance that can grow over the projection period.
- Monthly contribution: the recurring amount added each month.
- Annual return: the yearly growth assumption used in the projection.
- Desired monthly income: the income target used for a simple retirement gap comparison.
- Annual inflation: the yearly price-growth assumption used to translate today's desired income into future dollars.
- Contribution growth: the percentage by which the modeled monthly contribution increases after each projection year.
- Withdrawal rate: the illustrative annual percentage of projected savings used for the income comparison; it is not a personalized safe-withdrawal recommendation.
Formula or method
Current savings and monthly contributions are grown at a constant entered annual return until the chosen retirement age. The contribution can grow annually, the income target is inflated into future dollars, and the withdrawal comparison applies the percentage entered by the user to the projected balance.
Worked example
A projection can look large because it spans decades. Compare a lower-return run and a later-retirement-age run to understand whether the conclusion depends on one fragile assumption.
How to interpret the result
Projected savings are not a safe spending amount. Longevity, inflation, taxes, fees, sequence of returns, pensions, Social Security, health costs, and withdrawals can materially change a retirement outcome.
Practical checks before using the result
- Use today's spending power as a separate inflation question; the tool converts the entered income target into future dollars but does not forecast a personal cost-of-living index.
- Review contribution increases separately from investment-return assumptions so you know which lever is within your control.
Common mistakes
- Assuming the same return every year or treating an average as a guaranteed path.
- Comparing a projected account balance directly to one year of desired income without considering how long withdrawals must last.
Limitations and disclaimers
These results are general estimates only and are not financial, tax, or legal advice. They do not include live lender, payroll, tax-authority, market, contract, fee, insurance, or jurisdiction-specific data.
Related calculator context
Use Compound Interest to isolate savings growth and Inflation Calculator to express a target in future dollars. A qualified planner can address withdrawal strategy and benefits coordination.
Related glossary terms
These plain-English definitions can help you check the terms used in this calculator before relying on the result.
Frequently Asked Questions
Why cannot a constant-return projection show sequence risk?
A constant-rate projection cannot show the effect of gains and losses arriving in a different order around retirement. Projected savings are not a safe spending amount. Longevity, inflation, taxes, fees, sequence of returns, pensions, Social Security, health costs, and withdrawals can materially change a retirement outcome.
How should inflation and contribution increases be tested separately?
Use today's spending power as a separate inflation question; the tool converts the entered income target into future dollars but does not forecast a personal cost-of-living index. Review contribution increases separately from investment-return assumptions so you know which lever is within your control.
Which retirement risks are outside this projection?
These results are general estimates only and are not financial, tax, or legal advice. They do not include live lender, payroll, tax-authority, market, contract, fee, insurance, or jurisdiction-specific data.