finance calculator

Retirement Calculator

Plan retirement savings, income targets, and contribution needs.

Formula Verified by Dr. Elizabeth Vance, PhD

Quick actions: Save inputs, view saved runs, print, share, or export results

Saved Runs

Inputs

Current age

Retirement age

Current savings$

Monthly contribution$

Annual return%

Results

Projected retirement savings

$2,376,362

Total contributions$470,000

Investment gains$1,906,362

Years until retirement35 years

Average monthly growth$4,539

Bookmark this Retirement Calculator

Retirement planning requires continuous monitoring. Save this page to recalculate your nest egg targets when income, contribution levels, or target ages adjust.

Formula

Retirement savings method

Retirement savings = current savings compounded monthly + monthly contributions compounded until retirement

The calculator projects retirement savings using current savings, ongoing contributions, and assumed annual return.

Step by step

How the calculation works

1Enter current age, retirement age, savings, monthly contribution, and expected return.
2The calculator compounds savings month by month until retirement.
3Results show projected savings, contributions, and investment gains.

Example

Retirement example

A 30-year-old with $50,000 saved, contributing $1,000 per month until age 65 at a 7% annual return, is projected to reach about $2.1M.

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Trinity Study Success Rate Calculator

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Simulate how market volatility near retirement impacts portfolio depletion timeline.

How to understand and use this calculator

Projecting Your Target Retirement Nest Egg

Retirement planning is the process of building an asset base (nest egg) sufficient to generate ongoing income when you stop working. The size of the nest egg required depends directly on your desired retirement lifestyle and monthly expenses.

To model this trajectory, the calculator compounds your current retirement savings, adds your planned monthly contributions, and applies your expected annual return over the years remaining until your target retirement age.

Discretionary Income and the 4% Safe Withdrawal Rule

To determine if your projected retirement balance is sufficient, financial planners rely on the 4% Rule (developed in the Trinity Study). This safe withdrawal rate states that you can withdraw 4% of your total portfolio value in the first year of retirement, and adjust that amount for inflation annually, with a high probability of not running out of cash over 30 years.

$$\text{First Year Annual Income} = \text{Retirement Nest Egg} \times 0.04$$

For example, a nest egg of $1,000,000 supports an annual retirement income of $40,000. Under this rule, to generate $80,000 in annual income, you must target a total retirement portfolio of $2,000,000.

The Impact of Inflation on Retirement Targets

A common pitfall in retirement planning is ignoring inflation. A million dollars today will buy significantly less in 30 years because rising prices erode purchasing power. If inflation averages 3.0% per year, the cost of goods will double in about 24 years.

To account for inflation and view your future nest egg in today's purchasing power, subtract the expected inflation rate (e.g., 3.0%) from your expected annual return input. For example, if you expect an 8.0% market return, input a 5.0% return rate to view inflation-adjusted retirement value.

The Power of Employer Matches (401k/IRA)

If your employer offers a matching contribution to your 401(k), take full advantage. An employer match is effectively a 100% return on your contributed capital. Ensure you add both your personal contribution and the employer match amount to your monthly contribution inputs.

Related concepts

Safe Withdrawal Rate

The annual percentage of a portfolio withdrawn in retirement, minimizing risk of insolvency.

Roth IRA

A tax-advantaged retirement account offering tax-free investment growth and withdrawals.

Nominal Value

The face value of currency, unadjusted for inflation and purchasing power loss.

Frequently Asked Questions

How much do I need to save for retirement?+

A common rule of thumb is to save 25 times your expected annual retirement expenses (which supports the 4% safe withdrawal rule).

What is the 4 percent rule?+

The 4% rule is a guideline stating that you can safely withdraw 4% of your total retirement portfolio in the first year, adjusting for inflation annually, with low risk of running out of money over 30 years.

Does this calculator account for inflation?+

No. The calculator displays nominal values. To adjust for inflation, subtract the estimated annual inflation rate (e.g., 3%) from your expected return input.

What is the difference between a traditional 401k and a Roth IRA?+

Traditional 401ks use pre-tax contributions and are taxed upon withdrawal. Roth IRAs use after-tax contributions and allow tax-free growth and tax-free withdrawals in retirement.

What is a safe withdrawal rate (SWR)?+

An SWR is the estimated percentage of your retirement portfolio you can withdraw annually without depleting the balance before the end of your retirement term.

How do employer matching contributions work?+

Employers match a portion of your contributions (e.g., 50% of the first 6% you contribute) to your retirement account, providing free capital that compounds over time.

What is the catch-up contribution rule?+

IRS guidelines allow individuals aged 50 and older to make additional "catch-up" contributions above standard annual limits to 401ks and IRAs to accelerate retirement readiness.

Does this include Social Security income?+

No. The calculator models private retirement portfolio growth. You can subtract your estimated Social Security benefits from your target retirement expenses to find your required portfolio withdrawal rate.

What is a target-date fund (TDF)?+

A TDF is a mutual fund that automatically adjusts its asset allocation (glide path) from aggressive stocks to conservative bonds as you get closer to your target retirement year.

What is the danger of early retirement withdrawals?+

Withdrawing funds from tax-advantaged accounts before age 59½ typically triggers a 10% IRS penalty plus standard income taxes, and disrupts compounding growth.

How to understand and use this calculator

Projecting Your Target Retirement Nest Egg

Discretionary Income and the 4% Safe Withdrawal Rule

$$\text{First Year Annual Income} = \text{Retirement Nest Egg} \times 0.04$$

The Impact of Inflation on Retirement Targets

The Power of Employer Matches (401k/IRA)

Related concepts

Safe Withdrawal Rate

The annual percentage of a portfolio withdrawn in retirement, minimizing risk of insolvency.

Roth IRA

A tax-advantaged retirement account offering tax-free investment growth and withdrawals.

Nominal Value

The face value of currency, unadjusted for inflation and purchasing power loss.

Frequently Asked Questions

How much do I need to save for retirement?+

A common rule of thumb is to save 25 times your expected annual retirement expenses (which supports the 4% safe withdrawal rule).

What is the 4 percent rule?+

Does this calculator account for inflation?+

No. The calculator displays nominal values. To adjust for inflation, subtract the estimated annual inflation rate (e.g., 3%) from your expected return input.

What is the difference between a traditional 401k and a Roth IRA?+

Traditional 401ks use pre-tax contributions and are taxed upon withdrawal. Roth IRAs use after-tax contributions and allow tax-free growth and tax-free withdrawals in retirement.

What is a safe withdrawal rate (SWR)?+

An SWR is the estimated percentage of your retirement portfolio you can withdraw annually without depleting the balance before the end of your retirement term.

How do employer matching contributions work?+

Employers match a portion of your contributions (e.g., 50% of the first 6% you contribute) to your retirement account, providing free capital that compounds over time.

What is the catch-up contribution rule?+

IRS guidelines allow individuals aged 50 and older to make additional "catch-up" contributions above standard annual limits to 401ks and IRAs to accelerate retirement readiness.

Does this include Social Security income?+

What is a target-date fund (TDF)?+

A TDF is a mutual fund that automatically adjusts its asset allocation (glide path) from aggressive stocks to conservative bonds as you get closer to your target retirement year.

What is the danger of early retirement withdrawals?+

Withdrawing funds from tax-advantaged accounts before age 59½ typically triggers a 10% IRS penalty plus standard income taxes, and disrupts compounding growth.

Retirement Calculator

Inputs

Results

Bookmark this Retirement Calculator

Retirement savings method

How the calculation works

Retirement example

Learn more about this calculation

Retirement Savings Timeline: Plan by Stage and Age

401(k) vs IRA Guide: Limits, Match, Taxes, and Contribution Order

Tax-Advantaged Accounts: 2026 Rules and Comparison

Trinity Study Success Rate Calculator

Sequence of Returns Risk Simulator

Retirement Calculator

Inputs

Results

Bookmark this Retirement Calculator

Key output metrics

Contributions vs investment gains

Retirement savings timeline

How to understand and use this calculator

Projecting Your Target Retirement Nest Egg

Discretionary Income and the 4% Safe Withdrawal Rule

The Impact of Inflation on Retirement Targets

The Power of Employer Matches (401k/IRA)

Related concepts

Frequently Asked Questions

Retirement savings method

How the calculation works

Retirement example

Learn more about this calculation

Retirement Savings Timeline: Plan by Stage and Age

401(k) vs IRA Guide: Limits, Match, Taxes, and Contribution Order

Tax-Advantaged Accounts: 2026 Rules and Comparison

Trinity Study Success Rate Calculator

Sequence of Returns Risk Simulator

Key output metrics

Contributions vs investment gains

Retirement savings timeline

How to understand and use this calculator

Projecting Your Target Retirement Nest Egg

Discretionary Income and the 4% Safe Withdrawal Rule

The Impact of Inflation on Retirement Targets

The Power of Employer Matches (401k/IRA)

Related concepts

Frequently Asked Questions