Entry boxes

Your Age Input your current age. The calculator will project 20 and 40 years out, adding 20 and 40 years to the age you enter.

Current Value of Investable Liquid Assets Enter the current value of your investable assets, which the calculator will use, along with your other assumptions (below) to determine a directionally accurate prediction of your portfolio’s future value.

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Spend Rate
(as a percent of Asset Value) Input a number as a percentage of the total asset values you would like to spend each year. For example, 1% of a $10,000,000 portfolio would allow you to spend $100,000 in the first year. As your portfolio grows or shrinks your Spend Rate will be adjusted accordingly.
Tip: How much do you, can you, or should you spend? The result may help you evaluate whether to adjust your Spend Rate.

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Projected Average Investment Return After Fees Pick an average rate of return, minus your investment fees, that you think will reflect what your portfolio will return during a 20- to 40-year period. (Include banking, management, family office, and accounting or legal investment advisor fees. A reasonable estimate of these fees is between 1 and 2 percent. If you used 10% for your projected return and 1% for investment fees, enter 9% in this calculator.
Tip: The average rate of return of the S&P 500 between 1926 and 2007, pretax, was in the neighborhood of 10% per year. and Obviously, if you remained invested in equities in 2008 and 2009 your average return would look very different today.

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Projected Average Tax Rate Enter your combined federal and state income tax rate.
Ask your accountant to estimate your current average total tax rate (or projected average rate for the next 20 to 40 years).

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Projected Inflation Rate Assumption Historically, inflation has averaged 3 to 4 percent per year. Inflation in the 1970’s was in the teens and inflation in 2007 was lower than 3%. Pick a rate that you think will represent the next 20 to 40 years.
Tip: You might want to factor in a different inflation rate than the government reports, based on what goods and services you consume. For instance, if your purchases are weighted heavily on food and fuel, your personal inflation rate could be much different than the long-term average.

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Initial Spend Rate This is calculated by multiplying what you entered above in the "Current Value of Investable Liquid Assets" by the "Spend Rate". If the amount you current spend per year is more or less then this amount, you may want to change the "Spend Rate" percentage until it matches what you currently spend.

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Annual Contribution to Worth (Savings) Enter an amount if you are still contributing to your net worth (your annual contribution from your work or non-portfolio income ). It should be the amount you can put into your investments after all spending and taxes on the non-portfolio investing portion only. The calculator will compute taxes on your investments.

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Spend Rate at % of Assets in Each Year

Current Year

20 Years

40 Years

Age :

Value Liquid Assets @ % of Assets Spend Rate

Spend Rate @ % of Assets

Projected Investment Return After Fees

Tax Rate

Inflation Rate

Increase/decrease to Portfolio After Tax & Spending 

Spend Rate to Keep up With Inflation

Spending Power/Intergenerational Equity Ultimate spending power—your ability to provide intergeneration equity in the future. For example, if the calculator returns 100%, you will be able to provide full intergenerational equity for one child. If the calculator returns 300%, you will be able to provide intergeneration equity for three offspring. If the calculator returns anything less then 100%, you will not be able to provide full intergenerational equity for any of your kids—you will also likely need to reduce your own lifestyle as you grow older to avoid outliving your assets.

Initial Spend Rate, Then Keep Up With Inflation

Current Year

20 Years

40 Years

Age :

Value Liquid Assets @ Spend Rate This calculator computes this figure by multiplying your initial spend rate (increased by inflation) by your portfolio value, to show you how much more of your assets you will need to spend to keep up with future inflation over the next 20 to 40 years.
Tip: If you see a negative future portfolio value ,that means you will run out of money before or at that year. You may want to consider inputting different Spend Rates and recalculate.

Spend Rate to keep up With Inflation

Projected Investment Return After Fees.

Tax rate

Inflation Rate

Increase/decrease to portfolio After Tax & Spending 

Annual Contribution After Spending

Current Year

20 Years

Age :

Value Liquid Assets 

Projected Investment Return After Fees

Tax rate

Annual Contribution to Worth (Savings)

Annual Increase in Wealth

Reduction in Buying Power Due to Inflation

Inflation Adjusted Wealth @ Inflation

Family Business Growth Calculator

Projected Inflation Rate Assumption Historically, inflation has averaged 3 to 4 percent per year. Inflation in the 1970’s was in the teens and inflation in 2007 was lower than 3%. Pick a rate that you think will represent the next 20 to 40 years.
Tip: You might want to factor in a different inflation rate than the government reports, based on what goods and services you consume. For instance, if your purchases are weighted heavily on food and fuel, your personal inflation rate could be much different than the long-term average.

How Many Families Does Your Business Currently Support? Enter the number of family members who are stockholders (receiving dividends/distributions) and/or employees (receiving salary) from the family business.

How Many Additional Families Do You Want It To Support ? Enter the number of family members who will be stockholders or employees of the family business (see “how many years to reach that support?” below).

How Many Years To Reach That Support ? Tip: Your children will likely want to enjoy your current lifestyle by the time they reach age 30. If your youngest child is currently 10 and the oldest 15, you may want to enter 15 to 20 years to meet this expectation. If you believe some other age, such as 40 or 50, is more appropriate, enter the number of years until your children will completely share in the family business fortune.

Growth Rate Needed