๐Ÿ–๏ธ Monthly Investment for Retirement Calculator

Calculate how much you need to invest every month for retirement after considering inflation, retirement age, life expectancy, existing savings, retirement income, investment growth and annual investment increases.

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Enter details

Your average monthly living expenses today.
100 means the same spending level as today, before inflation.
Savings already available for retirement.
Money expected to be available at retirement, such as a future bonus or maturity value.
Pension, Social Security, annuity or other regular retirement income.
Amount you want to leave at the end of retirement.
Increase your monthly investment by this percentage each year.

Fill in the details and click Calculate to see your results.


Also available in our Android app, with charts and full breakdown tables.

๐Ÿ“˜ About the Monthly Retirement Investment

This calculator estimates the monthly investment required to build a retirement corpus for a person in any country.

It considers inflation, retirement age, life expectancy, current savings, other money available at retirement, retirement income, annual investment increases and expected investment returns.

It also compares the required investment with the current monthly investment plan.

๐Ÿงฎ Formula

Retirement expense
Retirement monthly expense = Current monthly expense ร— Retirement lifestyle % ร— (1 + Inflation)^Years to retirement
Existing savings growth
Current savings at retirement = Current savings ร— (1 + monthly return)^months
Monthly investment target
Required monthly investment = Corpus still needed รท Step-up investment factor
Projected retirement corpus
Projected corpus = Existing money at retirement + Future value of current investment plan

Where

  • Years to retirement = Retirement age minus current age
  • Retirement expense is increased for inflation until retirement
  • Current savings are compounded until retirement
  • Monthly investment can increase each year by the selected step-up percentage
  • Required retirement corpus is the present value at retirement of expenses less retirement income plus the desired legacy amount
The projection is an estimate based on the assumptions entered. Investment returns and inflation are not guaranteed.

โœ๏ธ Worked example

Example with 6% inflation

You enter
Current Age36 yrs
Retirement Age60 yrs
Life Expectancy85 yrs
Current Monthly Expenses50000
Retirement Lifestyle100%
Expected Inflation6%
Current Retirement Savings1000000
Other Money Available at Retirement0
Expected Monthly Retirement Income0
Annual Increase in Retirement Income0%
Desired Legacy Corpus0
Current Monthly Investment20000
Annual Increase in Investment5%
Expected Pre-Retirement Return10%
Expected Post-Retirement Return8%
You get
Years to Retirement24
Years in Retirement25
Monthly Expense at Retirement202,447
Monthly Retirement Income0
Required Retirement Corpus45,345,200
Existing Money at Retirement10,914,100
Corpus Needed from Investments34,431,100
Required Monthly Investment Today19,336.9
Required Monthly Investment at Retirement62,363.4
Current Plan Monthly Investment at Retirement64,502
Projected Corpus from Current Plan46,526,000
๐ŸŸข Surplus / ๐Ÿ”ด Shortfall1,180,740
Additional Monthly Investment Needed0
Future Value of Current Monthly Investments35,611,900

A person aged 36 plans to retire at 60, expects to live to 85, spends 50000 per month today and invests 20000 per month with a 5% annual increase.

Try this example โ†’

๐Ÿงญ How to use this calculator

What you enter

  • Current Age (yrs)
  • Retirement Age (yrs)
  • Life Expectancy (yrs)
  • Current Monthly ExpensesYour average monthly living expenses today.
  • Retirement Lifestyle (%)100 means the same spending level as today, before inflation.
  • Expected Inflation (%)
  • Current Retirement SavingsSavings already available for retirement.
  • Other Money Available at RetirementMoney expected to be available at retirement, such as a future bonus or maturity value.
  • Expected Monthly Retirement IncomePension, Social Security, annuity or other regular retirement income.
  • Annual Increase in Retirement Income (%)
  • Desired Legacy CorpusAmount you want to leave at the end of retirement.
  • Current Monthly Investment
  • Annual Increase in Investment (%)Increase your monthly investment by this percentage each year.
  • Expected Pre-Retirement Return (%)
  • Expected Post-Retirement Return (%)

What you get

  • Years to Retirement
  • Years in Retirement
  • Monthly Expense at Retirement
  • Monthly Retirement Income
  • Required Retirement Corpus
  • Existing Money at Retirement
  • Corpus Needed from Investments
  • Required Monthly Investment Today
  • Required Monthly Investment at Retirement
  • Current Plan Monthly Investment at Retirement
  • Projected Corpus from Current Plan
  • ๐ŸŸข Surplus / ๐Ÿ”ด Shortfall
  • Additional Monthly Investment Needed
  • Future Value of Current Monthly Investments

๐Ÿ’ก What this calculator includes

  • Inflation adjusted retirement expenses
  • Current retirement savings
  • Other money available at retirement
  • Pension or other retirement income
  • Annual increase in retirement income
  • Annual increase in monthly investment
  • Pre-retirement return
  • Post-retirement return
  • Desired legacy corpus

๐Ÿ’ก How to use the result

  • Compare the required monthly investment with your current monthly investment.
  • If the current plan shows a shortfall, increase the monthly investment, increase the annual step-up, extend the retirement age or review the assumptions.
  • Use conservative return assumptions because actual investment returns can vary.

โ“ Frequently asked questions

What inflation rate should I enter?

Enter the long term annual inflation rate you expect to experience before and during retirement. A higher inflation assumption increases the required retirement corpus.

What is an annual investment increase?

It is the percentage by which your monthly investment rises each year. For example, a 5% increase means 20000 becomes 21000 after one year.

Can I include pension or Social Security income?

Yes. Enter the expected monthly retirement income and an annual increase if you expect that income to rise over time.

What is the legacy corpus?

It is the amount you want to remain at the end of your retirement period for heirs, family or other goals.

Does this calculator guarantee my retirement amount?

No. The result is a projection based on the assumptions entered. Inflation, investment returns, taxes, fees and future income can differ from the assumptions.